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1) Cavitation occurs due toA) High velocity B) Low Barometric Pressure C) High Pressure D) Low pressureE) None of these
2) The velocity of fluid particle at the centre of the pipe section isA) Maximum B) Minimum C) Average D) R.M.S E) None of these
3) During throttling processA) Internal energy does not change B) Pressure does not changeC) Entropy does not change D) Enthalpy does not change E) None of these
4) In an automobile gear box is fitted betweenA) Engine and clutch B) Clutch and Differential C) Differential and heelsD) Clutch and Wheels E) None of these
5) During an adiabatic process the change in entropy isA) + ve B) –ve C) Zero D) +ve or –ve E) None of these
6) Volume of air at 27°C is 2 cu-m. What will de the volume at 372°CA) 2 cu-m B) 3 cu-m C) 6 cu-m D) 8 cu-m E) None of these
7) Air conditioning meansA) Cooling B) Heating C) Dehumidifying D) All the above E) None of the above
8) Brazing is the process of joiningA) Two ferrous materials B) One ferrous and one non ferrous materialC) Two Non ferrous materials D) Two non-metals E) None of these
9) Second Law of Thermo dynamics defines ……………… A) Heat B) Work C) Enthalpy D) Entropy E) None of the above
10) Acoustic materialsA) Absorb sound B) Reflect sound C) Create sound D) Absorb & create sound E) None of these
11) The basic shaft isA) One which has no upper deviation B) One which has no lower deviationC) One which has least deviation on both upper and lower sideD) Does not exits E) None of these
12) The standard angle between the V belt isA) 20° B) 30° C) 45° D) 40° E) None of the above
13) The purpose of annealingA) Induce Hardening B) Induce stress C) Harden the surface D) Remove Stress E) Noneof these
14) The tool signature comprisesA) 5 elements B) 6 elements C) 7 elements D) 8 elements E) None of these
15) A shim isA) A treatment given to a surface to prevent rusting B) A dull corner on a shaftC) A thin piece of sheet metal used between mating parts to provide the proper distance D) A surfaceon which bearings are fitted E) None of these
16) Spot facing isA) Localized machining of a component B) Machining of a spot to fit other artsC) Machining of spot on the surface of a part to furnish a flat bearing or the head of a bolt or nut D) Aspot prepared on shaper or milling machineE) None of these
17) Quill isA) A tool used in milling machine to cut T-slots B) A holding device used on planers C) Cutting a blindkey way on an object D) A steel tube in the head of some machine tools that encloses the bearingsand rotating spindle on which are mounted the cutting tools E) None of these
18) Which of the following materials will have highest value of contraction allowance?A) Cast iron B) Aluminium C) Brass D) Malleable iron E) None of these
19) In hot blast cupolaA) Temperature is high B) Melting rate is high C) Carbon % in castings is highD) Air supplied is preheated E) None of these
20) Which one of the following is used for Thermocouple junctions?A) Elinvar B) Manganin C) Nichrome D) Muntz metal E) None of these
21) In a sine bar the standard length is measured fromA) Edge to edge B) Between inner circumferences of two buttons C) Between outer circumferences oftwo buttons D) Between the centers of two buttonsE) Any of the above.
22) The surface roughness on a drawing is represented byA) Circle B) Square C) Zigzag lines D) Triangle E) none of these
23) A sine bar is used to measureA) Surface roughness B) Gear Profiles C) Internal tapers D) External tapersE) Any of these
24) M 10 screws have a pitch ofA) 0.5 mm B) 1.25mm C) 1.5mm D) 10mm E) None of these
25) A diffuserA) Converts kinetic energy into thermal energy B) Converts potential energy into kinetic energy C)Converts pressure energy into kinetic energyD) Converts thermal energy into kinetic energy E) None of these
26) A substance above critical temperature exists asA) Solid B) Liquid C) Dry vapour D) Wet vapour E) Gas
27) Working medium for closed cycle gas turbine should haveA) High molecular weight B) Low specific volume C) Higher adiabatic indexD) Lower specific speed E) None of the above
28) In a cupola the raw material isA) Pig iron and iron scrap B) Iron ore C) Cast steel D) Steel ingots E) Steel billets
29) Surging isA) An unsteady, periodic and reversal of flow in the compressor. B) The fixed mass flow rateregardless of pressure ratio C) The reduction in lift force at higher angles of incidence D) None of theseE) All the above
30) Ice is slippery when a man walks on it forA) Its surface is smooth B) There is no friction C) It is very chill D) Increase of pressure causes it tomelt E) It has lubricating capacity
31) In case of black body A) =0, =0, =1 B) =0, =1, =1 C) =0, =1, =0 D) =1, =1, =0 E) =1, =0, =0
32) A hot wire anemometer is used to measure Pressure of gases.
33) The operation of cutting multiple holes is calledA) Trimming B) Notching C) Perforating D) Lancing E) None of the above
34) A twist drill is specified byA) The size of hole it can drill B) A number specifying whole size C) A letter of alphabet D) Any ofthe above E) None of the above
35) Dry bulb temperature depends onA) Humidity of air B) Water vapour content of air C) Condition of airD) All above E) None of the above
36) The potential energy stored up in a deformed body is known asA) Strain energy B) Potential energy C) Resilience D) Deformation energyE) None of the above
37) Idler pulley is used forA) Maintaining belt tension B) Changing direction of rotation C) For stopping motion frequently D)For running during idling periods only E) None of the above
38) Continuous chips may be formed while machiningA) Brittle material B) Hard material C) Tough material D) Ductile materialE) None of the above
39) The output of blast furnaceA) Cast steel B) Mild steel C) Pig iron D) Cast iron E) None of the above
40) An ordinary mercury thermometer can be used for temperature aboutA) 100°C B) 200°C C) 400°C D) 500°C E) None of the above
41. A stone initially at rest is dropped from the edge of a very tall building. Taking acceleration as10m/s2, what was the change in the speed of the stone during the 4th second?a. 10m/s b. 30m/s c. 15m/s d. 40m/s e. None of the above
42. Which of the following methods in welding uses a pool of molten metal?a. Carbon arc welding b. TIG welding c. Submerged arc welding d. MIG weldinge. Thermit welding
43. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through itsvertex and parallel to the base is __________ than that passing through its C.G. and parallel to the base.a. Nine times b. six times c. four times d. one-half e. one-third
44. A hydrometer is used to measurea. velocity of fluids b. velocity of gases c. flow of fluids d. specific gravity of fluidse. none of these
45. A taper provided on the pattern for its easy and clean withdrawal from the mould is known as A.machining allowance B. draft allowance c. shrinkage allowance d. distortion allowance e. None of theabove
46. How many of the following statements may be false?1. Weight is a scalar quantity. 2. Parallelogram law of forces is applicable for finding the resultant of allkinds of forces. 3. Law of conservation of momentum is developed from Newton’s third law. 4. The unitof impulse is Newton/second. 5. The frictional force depends on shape and area of contact of the bodies.a. One only b. Two only c. Three only d. Four only e. All of the above
47. The standard dimensions of the drawing sheet A2 isa. 594x420 mm b. 420x297 mm c. 841x594 mm d. 297x210 mm e. None of the above
48. ISO stands for International Standards Organisation.
49. The branch of science that deals with study of body in motion, considering the forces that causes themotion is known asa. Dynamics b. Statics c. Kinematics d. Kinetics e. None of these
50. Second law of thermodynamics definea. internal energy b. entropy c. enthalpy d. temperature e. none
51. Which mechanical property a metal should possess to enable it to be mechanically formed?a. ductility b. malleability c. elasticity e. machinability e. None of the above
52. The pH value of water isa. 3 b. 5 c. 7 d.9 e.None.
53. Which of the following refers to investment casting?a. lost wax method b. accuracy casting c. centrifugal casting d. both (a) and (b)e. both (a) and (c)
54. The angle of projection shown in the figures A and B respectively are
A) B)
a. First angle and third angle b. Third angle and first angle c. Third angle and fourth angled. Fourth angle and third angle e. None of the above
55. The ratio of volumes of a sphere and a cone isa. 4r/h b. 4r/3h c. 2r/h d. 3 e. None
56. In green-sand moulding, uniform ramming leads toa. less change of gas porosity b. uniform flow of molten metal into the mould cavityc. greater dimensional stability of the casting d. less sand expansion type of casting defectse. None of the above
57. Which one of the following processes in welding uses non-consumable electrodes?a. TIG welding b. MIG welding c. Manual arc welding d. Submerged arc weldinge. None of the above
58. The properties of LASER are high coherence, unidirectional, Monochromatic, Long distancepropagation
59. The unit of moment of inertia isa. Kg/m2 b. Kg-m2 c. Kg/m d. Kg-m e. None
60. Disposable patterns are made ofa. wood b. rubber c. metal d. polystyrene e. all the above
61. Ball bearing material?a. chromium b. high carbon steel c. medium carbon steel d. low carbon steel
62. Necking? a. drill a hole in a plate b. groove is a cylinder c. initially making a spot to join the metald. drill with rivet
63. Size of lathe specified bya. Gross wt b. chuck dia c. swing d. speed of chuck
64. Power transmitted from lead screw to carriage througha. half nut b. rack and pinion c. gear box d. pulley
65. Left hand tool of lathe - ? Ans: Feed from Head stock to tail stock
66. Using HSS tool in lathe, max speed will be given ina. cast iron b. mild steel c. aluminium
67. In which operation in lathe, cutting speed will be minimum fora. parting off b. taper turning c. finishing d. thread cutting
68. Gratings are used in connection witha. linear displacement measurement b. surface texture measurement
c. angular measurement
69. At what position, strain will increase, when stress is constanta. upper yield point b. lower yield point c. proportional limit d. elastic limit
70. shape of bending moment, it shows when we applied no external load,a. linear b. curve d. parabolic
71. Relationship between E, k, G? Ans: E= 9KG / (3K+G)
72. Mechanism used in petrol engine?a. slider mechanism b. crank mechanism c. slider crank mechanism
73. 18/8 steel containsa. 18% Ni ,8% Cr b. 18% Cr ,8% Ni c. 18% Vd ,8% Ni d. none of these
74. Sulphur is removed from cast-iron when same is melt in cupola the flux is --?
75. Plaster pattern & cores are made up ofa. plaster of paris b. cement c. white powder
76. Pilot tube is used to measure velocity.
77. Darry weisbach formula usage? Ans: Hf = (4f l v 2)/ (2 g d)
78. Velocity distribution for laminar flow in circular pipe? Ans: Parabolic
79. If resultant, R=0, bodya. rotate with uniform accl. b. Rotate with uniform disp. c. Does not rotate d. Rotate
80. Shock load measures energy.
81. Carbon steel is an alloy of iron and carbon with varying quantities of ………..?Phosphorous & sulphur
82. Varigon’s theorem - Algebraic sum of moments of a given set of forces about a point is equal to themoment of their resultant.
83. Compound mechanism is with more than a. 2 links b. 3 links c. 1 link
84. Type of governor used in record player for adjusting the turn table isa. hartung governor b. Pickering governor c. proell governor d. porter governor
85. Pantograph, all pairs are a. sliding b. turning c. spherical d. self closed pair
86. Belt drive isa. positive b. not positive c. for small torque only d. power transmission for parallel axis only
87. Quasi static process, definition
88. Total energy line represents?
89. If mass/energy transfer is zero, then what system? Ans: Isolated system
90. Which cycle is less efficient?
91. What chuck is used for brass castings? a. 4 jaw b. 3 jaw c. collet d. magnetic
92. Which is most important for measuring instrument?a. precision b. sensitiveness c. accuracy d. repeatability
93. Purpose of tolerance a. for perfect fit b. can’t machine exact size c. allowance.
94. According to Boyle’s law for a perfect gasa.T2/T1=P2/P1,if V is kept constant b.T2/T1=V2/V1,if P is kept constantBoth (a) and (b) above. P2/P1=V1/V2, if T is kept constant PV/T constant
95. Absolute Zero pressure will occura. At sea level b. At the centre of the earth c. When molecular momentum of the system become zerod. Under vaccum condition e. At a temperature of -273 degree k
96. Boyle’s law i.e. PV=constant is applicable to gases undera. All ranges of pressure b. Only small range of pressure c. High range of pressure d. Steady change ofpressure e. Atmospheric conditions
97. The Internal energy of a system is a function of onlya. Pressure b. Temperature (absolute) c. Volume d. Pressure and temperature e. Pressure andtemperature and volume
98. Pick up the wrong statementa. 2-stroke engine can be run in any direction b. In 4-stroke engine a power stroke is obtained in 4-strokes c. Thermal efficiency of 4-stroke engine is more due to positive scavenging d. Petrol enginesworks on otto cycle e. Petrol engines occupy more space than diesel engines for same power output
99. Diesel fuel, compare to petrol isa. Less difficult to ignite b. Just about the same to ignite c. More difficult to ignited. Highly ignitable e. None of the above
100. The function of a condenser in thermal power plant is to condense steam into condensate to bereused again
101. In diesel engine, the compression ratio in comparison to expansion ratio isa. Same b. Less c. More d. Variable e. More / Less depending on engine capacity
102. Flash point of fuel is Minimum temperature to which oil is heated in order to give offinflammable vapours in sufficient quantity to ignite momentarily when brought in contact with aflame
103. The function of piston rod in IC engine is toa. Transfer motion from piston to cross headb. Transfer motion from piston to connecting rodc. Provide reciprocating motion to slide valved. Convert reciprocating motion of piston to rotary motione. To control cut off point
104. Electroplating requires? (1) AC 2) DC 3) high frequency ac
105. Carnot cycle has max efficiency for reversible engine
106. Fuel-air ratio in a petrol engine fitted with suction carburetor, operating with dirty air filter ascompared to clean filter will be? Higher
107. In S.I engines, air fuel ratio for idling speed is?
108. Helical gears are used for noise reduction.
109. Hardest cutting tool material is tungsten carbide.
110. for uniform strength of beam condition req.a. Depth constant, width increases. b. Depth increases, width decreases.c. Both should be increases. d. All the above. e. None of the above
111. Phenomenon of chocking in compressor meansa. No flow of air b. Fixed mass flow rate regardless of pressure ratio c. Reducing mass flow rate withincrease in pressure ratio d. Increased inclination of chord with air stream e. Does not occur
112. A jet engine works on the principle of conservation ofa. Mass b. Energy c. Flor d. Linear momentum e. Angular momentum
113. The domestic refrigerator uses following type of compressora. Centrifugal b. Axial c. Miniature sealed unit d. Piston type of reciprocating e. None of the above
114. Ammonia is Toxic and non-inflammable
115. If operating temperature of system is low, then refrigerant with low boiling point should be used
116. Poise to the unit of Viscosity
117. A bucket of water is hanging from a spring balance. An iron piece is suspended intowater without touching sides of bucket from another support .The spring balance reading willa. Increase b. Decrease c. Remain same d. Increase / decrease depending on depth of immersione. Unpredictable.
118. Liquids transmit pressure equally in all directions. This is according toa. Boyle’s law b. Archimedes principle c. Pascal’s law d. Newton’s formula e. Chezy’s equation
119. Piezometer is used to measurea. Pressure in pipes, channels etc. b. Atmospheric pressure c. Very low pressured. Difference of pressure between two points e. Flow
120. The centre of gravity of a triangle lies at the point ofa. concurrence of the medians b. Intersection of its altitudes c. Intersection of bisector of angles d.Intersection of diagonals e. All of the above
121. A ball is throwing up. The sum of kinetic and potential energies will be maximum ata. Ground b. Highest point c. In the centre while going up d. At all the pointse. In the centre while coming down
122. The atmosphere of earth is retained due toa. Gravitational pull of earth b. Outer molecule attraction forces on the molecule c. As a result ofcohesion, adhesion, osmosis, etc. d. Spherical shape of earth e. Mean speed of molecule being much lessthan the escape velocity
123. According to Hooke’s law, stress and straina. Are directly proportional b. Are inversely proportional c. Are curvilineraly relatedd. Have unpredictable relationship e. None of the above
124. In an ideal machine, the output as compared to input isa. Less b. More c. equal d. May be less or more depending on efficiency e. Always equal
125. Creep in belt is due toa. Material of the pulley b. Material of the belt c. Larger size of the driver pulley d. Uneven extensionsand contractions due to varying tension e. Expansion of belt
126. The horse power transmitted by a belt is depending upona. Tension on tight side of belt b. Tension on slack side of belt c. Speed of pulley d. All of the above
127. Melting point of iron isa. 1539°C b. 1601 °C c. 1489 °C d. 1712 °C e. 1131 °C
128. Cupola produces following Materiala. Cast iron b. Pig iron c. Wrought iron d. Malleable iron e. White iron
129. Brass Contains 70% copper and 30% zinc
130. In which type of Welding chemical reaction takes placea. Resistance b. Termite c. Forge d. Gas
131. Resistance to fatigue strength is measured bya. Tensile Test b. Shear Test c. Endurance Limit
132. A fly wheel starts from rest and accelerates uniformly and reaches 25 rpm in 3 seconds. What willbe the angular velocity (in rpm) after 10 seconds? a. 20 b. 25 c. 45 d. 50
133. Radio active materials emitsa. Alpha b. Beta c. Gamma d. All the above
134. Expansion valves are used in pipes carryinga. Water b. Steam c. Viscous fluid d. Air at high pressure
135. ON/OFF Control application Valvea. Ball valve b. Globe valve c. Needle valve d. Butter fly valve.
136. Thermal Conductivity of Solids with increase of tempa. Increases b. Decrease c. Increases then Decrease d. Unpredictable
137. Idling mixture in Petrol Enginesa. Rich b. Lean c. Variable
138. Radiator is made up ofa. Brass b. Steel c. Plastic d. Cast Iron
139. Hysterises loss is least affected by a. Temperature b. Frequency c. Weight d. Density
140. Compiler is used forA. High level to the Language understandable by machines B. To convert the programmes from Digitalto Analog form C. To compile the instructions in registers D. Both B & C
141. Heat treatment of steel changesa. Physical b. Chemical c. Mechanical properties
142. Fusible plug is used fora. To control Steam Temperature b. To put off the fire when the water level in the boiler falls below thealarming limit c. To avoid Explosion.
143. Effect of Cavitation in Turbinesa. Noise and Vibration b. Efficiency c. Decrease in life of blades d. All the above.
144. The correct relation between Gauge pressures, Absolute pressure, Atmospheric pressure (4 choices)
145. Which of the following has the maximum Head?a. 33 inches Hg b. 756 mm of Hg c. 31.6 m of water (Not clear) d. 1.013 kg/sq.cm
146. Manometer is effective fora. High pressure b. Very High pressure c. Low pressure d. None of the above
147. Elasticity of a fluid is measured bya. Modulus of Elasticity b. Rigidity Modulus c. Bulk Modulus d. None of the above
148. Where the bending stress is maximum for I Section Beama. Neutral axis b. At the joint of wedge and flank c. where the shear stress is maximum d. Outer most ofthe fibres
149. The oil of sp. gravity 0.9 and water are kept in two identical vessels, Hydro static Pressure atbottom of oil will be a. More than pressure of the water at the bottom b. Less than pressure of the waterat the top c. Same d. Insufficient data
150. Cp / Cv of Gas at varying temperaturesa. Constant b.Increases c. Decreases(With some conditions)
151. Compression ratio of the C.I. Enginea. 8 to 10 b. 10 to 15 c. 16 to 20 d. None
152. The sate of the refrigerant in the vapour compression cycle before throttlinga. Wet b. Dry
153. Feuler gauges are used to Measure the clearance
154. High moisture content in the last stage of turbine will causea. Corrosion b. Low thermal efficiency c. Low Blade life d. All the above
155. What alloying material imparts corrosive resistance properties of steel a. Ni-Cr b. V,Cr c. Cr
156. Chip breakers are used fora. To permit small chips b. to increase tool life c. Safety
157. Jigs are used fora. Turning b. Milling c. Drilling d. Grinding
158. In coal refineries magnets are used to separatea. Dust b. Iron particles c. Sand d. All the above
159. Statistical processing is done fora. Improve the quality b. maintain the quality c. both 1 and 2 d. to increase the profit
160. What will happen to the specific volume of the water when it is heated from 0 degree ca. Increases b. Decreases c. Remain Constant
161. Reason for slipping when we walk on the Icea. Ice suface is smooth b. When we apply pressure on the Ice it gets melted
162. When the Ice cubes present in the glass of water get melted what will happen to the level of watera. Increases b. Decreases c. Doesn't change
163. First law of Thermodynamics deals witha. Conservation of Mass b. Conservation of Momentum c. Conservation of Energyd. Conservation of Heat
164. Tonnage of 165 domestic refrigerators
165. Thermal Conductivity of Water with increase in tempa. Increases with temp b. Decreases then increases c. Increases then Decreases d. Does not change
166. Purpose of conducting Tensile Test - Ductility
167. Which structure can be viewed by Naked Eye?a. Micro Structure b. Grain c. Macro d. Atomic
168. What is the material of Crank Shaft? Forged Steel or Less Carbon Steel
169. Standard time = a. normal time minus allowance b. reliability time
170. Energy stored in the spring when it is fully compressed without any deformation is Strain Energy
171. For which of the following material machinability is high? Aluminium
172. 24 & 2 in M24X2 represent which of the two parameters respectively?Diameter and Pitch
173. What is the equation governing kinematics links and pairs?a. L=2p-3 b. L=2p-4 c. L=3p-5
174. Pick out the wrong statementa. Joule cycle consists of 2 constant volume processes and 2 adiabatic processesb. Otto cycle consists of 2 constant volume processes and 2 adiabatic processesc. Ericsson cycle consists of 2 constant volume processes and 2 adiabatic processesd. None of the above
175. For same compression ratio which of the following cycle is more efficient?a. Otto b. diesel c. Dual Cycle d. All the above.
176. The angle between face of the tool and plane parallel to the base of the tool isa. rake angle b. clearance angle c. cutting edge angle d. lip angle
177. Bevel gears are used for transmitting torque betweena. Intersecting & coplanar shafts b. Non-intersecting & non-coplanar shaftsc. Non-parallel & non-coplanar shafts d. None of the above
178. Expansion process in Otto cycle lasts from TDC to BDC.
179. Which type of thread is more effective for power transmission in one direction?a. Square b. ACME c. Buttress d. Trapezoidal
180. The state of a liquid during evaporation isa. Vapour b. Steam c. Water vapour d. None of the above
181. Throttle valve is used in steam engines toa. control pressure of steam b. control volume of steam c. control temperature of steamd. none of the above
182. The pressure P in terms of its mean kinetic energy/unit volume E isa .E/3 b.E/2 c.3E/4 d.2E/3 e.5E/4
183. Convert volumetric to gravitational, relative volume of each constituent of flue gasa. %mw b. xmv c. me d. xsw e. %sw
184. Which is correct for reversible polytrophic process?a. temperature constant b. density constant c. volume constantd. entropy constant e. same heat transfer
185. If a gas or vapour allowed to expand through a minute holea. free expansion b. hyperbolic c. adiabatic expansion d. parabolic e. throttling
186. Minimum work of compressor is possible, when the adiabatic index isa.0.75 b.1 c.1.27 d.1.35 e.2
187. Under ideal condition, isothermal, isochoric, adiabatic and isobaric area. Static b. dynamic c. quasi-static d. stable e. thermodynamic
188. If a heat engine attains 100% efficiency, then it isa. Zeroth law b. I law c. II law d. no e. all
189. If Q1 is the heat in source, Q2 is the cold sink for heat pump then COPa. Q1 / (Q1- Q2) b. Q2 / (Q1- Q2) c. (Q1- Q2) / Q1 d. Q2 / Q1
190. The output of diesel engine is increased ifa. more fuel b. flywheel size c. incoming air d. scavenging e. supercharging
191. Key used between shaft and pulley is made from? Cold rolled mild steel bars
192. Hardness of steel depends on shape & distribution of ….in iron? Carbides
193. Hardening of Machine tool guideways is done by? Flame hardening
194. Carriage and tailstock are placed in ….. guideways? Different
195. Acetylene is stored in liquid form
196. Size of shaper is specified by? Length of stroke
197. Hardness of wheel (or) grade of wheel refers to? Strength of bond of wheel
198. For grinding harder materials…… is used? Softer grade
199. Dielectric medium in EDM is? Kerosene
200. The most popular firing sequence a.1234 b.1324 c.1423 d.1243 e.1342
201. Accumulation of carbon in the cylinder increases whena. decrease in volume b. volumetric efficiency c. ignition timed. effective compression ratio e. travel time
202. For same power, same speed, flywheel of petrol and diesel engine area. smaller b. greater c. equal d. none
203. If petrol is used in diesel engine, then which will occura. higher knocking b. black smoke c. More fuel Consumption d. improper combustion
204. Reciprocating compressor is used fora. large quantity of air at high pressure b. large quantity of air at low pressurec. low quantity of air at low pressure d . Low quantity of air at high pressure
205. Thermal diffusivity is ____________a. Dimensionless b. Used in radiation c. used in Convectiond. Used in Conduction
206. When the Centre of pressure and Centre of gravity are equal?When the body is horizontal
207. Flow of particles in definite path without change in the path of the particlea. One dimensional b. laminar c. turbulent d. steady state
208. Vortex on whirlpool is due toa. cavitation b. wake c. drag
209. Sling Psychometer is used for Humidity
210. Axial flow pump is used large flow and small head of fluid
211. Hardening of shear face in press tool is to ---------------.
212. Blank size is equal to ……….in presswork. Size of punch
213. Bending moment diagram for a UDL in cantilever beam.a. Parabola b. Triangle c. Rectangle.
214. Reverse joule cycle is ………. (Bell coalman cycle, Rankine cycle, brayton cycle)
215. During idling and low speed running which mixture is used……..rich mixture, lean mixture,
216. Multi slurry is used for …………? High efficiency, balancing and uniform torque, runcontinuously when one cylinder is failed.
217. Entropy changes with ……?a. internal energy change, b. Pr & Vol change c. change of state d. Change in temp
218. In which process max work can be obtained….? Const Volume, Const Pr, Const Temp, ConstEntropy
219. In throttling process………is constant? (Enthalpy, entropy)
220. To avoid caviation Superheated steam allowed
222. What is Rupture Necking due to prolonged creep
223. A belt drive, where pulley dia is double, and then it key length must bea. doubled b. same c. increase the critical length d.
224. Surface contact in motion is calleda. roller pair b. surface pair c. lower pair d. sliding pair
225. For fluctuating load----------- is useda. ball bearing b. roll bearing c. thrust bearing d. sleeve bearing
226. D1 and D2 are pulley dia, and then the speed ratio is given by D2/D1
227. In pinion and gear design, the design must be made bya. gear b. pinion c. both
228. The plate is severely deformed at a side then it grains becomesa. Ductile b. Malleable c. Brittle
229. What is recrystallation temperature? Maximum temperature upto which old crystal disappears
230. What is austempering? Heated steel is quenched from the Austenizing Temperature
231. Acetylene is stored in --------- forma. liquid b. solid c. compressed d. All the above
232. Tool life is concentrated ona. cutting speed b. material c. feed or depth d. All the above
233. Reamer is used fora. To drill b. to correct the size and finish c. Threading
234. Statistical quality control charts usesa. statistics b. probability c. all the above.
235. Material used for coating the electrode is calleda) Protective layer b) binder c) slag d) deoxidizer e) flux
236. The strength of a properly welded joint as compared to base metala) Same b) more c) less d) unpredictable e) two can’t be compared
237. The surface to be machined are marked on the pattern by the following colora) Black b) yellow c) red d) blue e) green
238. A 20 tonne press implies thata) Weight of press is 20 tonnes b) press can handle works weighing upto 20 tonnesc) it can exert pressure upto 20 tonnes d) its foundation should be designed for 20 tonnes.e) its turnover in a day is 20 tonnes
239. No lubricant is required when cutting threads ina) Tungsten carbide b) Mild Steel c) Titanium d) Brass or cast-iron e) HSS
240. The difference between planner and shaper is that in former casea) Tool moves over stationary work b) tool moves over reciprocating workc) Tool can machine internal as well as external details d) both tool and job reciprocatese) Tool is stationary and job reciprocates
241. Powder metallurgy techniques are used in production ofa) High carbon tool steel b) HSS tools c) tungsten carbide tools d) twist drills e) ceramics
242. Drilling is an example ofa) Simple cutting b) uniform cutting c) orthogonal cutting d) oblique cuttinge) Intermittent cutting
243. Reamer is used to correct thea) Size and position of drilled hole. b) size and roundness of holec) Finish and position of drilled hole. d) finish and size of drilled holee) Finish and depth of a drilled hole.
244. The operation of milling two sides of a work piece simultaneously is calleda) Gang milling b) climb milling c) square milling d) straddle milling e) End milling
245. In which type of milling operation the chip is cut off at thinnest place and the chip thicknessincreases along chip length a) Up milling b) down milling c) end milling d) climb milling e) key waymilling
246. A sine bar is specified bya) Its total length b) the center distance between two rollers c) size of the rollersd) The distance between rollers and upper surface e) weight of sine bar
247. Expressing a dimension as 18.3±0.02 mm is the case ofa) Unilateral tolerance b) bilateral tolerance c) limiting dimensionsd) All the above e) none of the above
248. LASER stands for Light amplification by simulated emission of radiation
249. Gantt chart provides the information abouta) Material handling b) proper utilization of manpower c) production scheduled) Efficient working of machine e) all the above
250. Normalising operation is carried out ina) Furnace b) air c) water d) oil e) controlled atmosphere
251. Draw the Fillet welding symbol
252. Who is the father of scientific management? F.W.Taylor
253. PERT stands for Projection Evaluation and Review Technique
254. Draw Third angle projection symbol
255. What is the unit of specific gravity? No Unit.
256. Momentum is a _______________ quantity (Scalar / Vector)
257. Pressure applied in a liquid in all directions will be given by Pascal’s law.
258. In Piercing and punching, clearance will be applied on Punch
259. Permanent plastic deformation of metals under compression is known as Malleability
260. To increase corrosion resistance which material will be added? Chromium
261. Cycle used in petrol engine? Otto
262. What is the use of index pulley? To provide grip to the pulley.
263. What is resilience? Energy absorbed by the material when it is loaded.
264. M20*2 –in this 20 represents what? Major Dia
265. Property of which type of material is same in all directions? Isotropic of materials
266. Solder is an alloy consisting of Tin & Copper
267. In a cantilever beam when a point load is applied on free end, where will failure occur? At thefixed end.
268. Plastic deformation due to constant load at high temp is known as Creep.
269. What is Galvanizing? The process of coating of zinc by hot dipping.
270. ABC analysis deals with Controlling inventory costs money.
271. When pulley dia is doubled, width is kept constant, tension is kept constant key size should bea. Doubled in length. b. Doubled in depth. c. Both twice.
272. Thermoplastics can be molded by Injection molding
273. Which load is safe for beam---------------?a. Point load. b. UDL locally. c. UDL fully. d. UVL.
274. Machine tool drives are generally given in:a. Arithmetic progression b. Geometric progression c. Harmonic progression d. None of the above
275. Finite element analysis is used in:a. Accurate measurement b. Stress analysis C. metallurgy D. none of the above
276. Coolant is generally not used while machining:A. low carbon steel B. high carbon steel C. cast iron D. alloy steel
277. Machinability of steel is improved by the presence of:A. nickel B. tungsten C. sulphur D. chromium
278. Negative rake angle:A. increases cutting force B. reduces cutting force C. no effect on cutting force D. none of the above
279. The hardest tool material used is:A. coated carbide B. high speed steel C. boron nitride D. diamond
280. Stick slip phenomena is associated withA. spindle rotation B. belt drives C. slide movement D. none of the above
281. Gear hobbing is:A. shaping process B. generating process C. forming process
282. Cutting speed of HSS tools while cutting low carbon steel is:A. 40M/Min B. 250M/Min C. 500M/min D. none of the above
283. Cutting speed of carbide tools while cutting low carbon steel is:A. 40M/Min B. 250M/Min C. 500M/min D. 80M/Min
284. Straightness that can be achieved over a length of 300mm by grinding:a. 0.005-.01mm b. 0.1-0.2mm c. 0.05-0.1mm d. 0.5-0.8mm
285. The circularity achieved by finish turning on a standard centre lathe is:a. 0.005-0.008mm b. 0.0-0.08mm c. 0.1-0.2mm d. 0.2-0.3mm
286. Honing can correct:A. oviality B. taper C. straightness of bore D. axial curvature
287. Machine tool sliding surfaces are finish matched by:a. surface grinding b. fine milling c. slideway grinding d. scraping
288. Close sliding fit is given by:a. H7/g6 b. H7/h6 c. H7/p6 d. H7/k6
289. 60H6 can be achieved by:A. turning B. boring C. drilling D. internal grinding
290. The displacement accuracy which can be achieved on a jig boring machine is:A. 5/µm B. 50/µm C. 100/µm
291. Hardness values in cast iron can be measured in:A. shore b. BHN c. Rockwell d. None of the above
292. Auto collimator is used to measure:a. Dia upto 0.001mm b. Lengths c. Straightness d. Involutes error
293. Surface finish is measured by:a. Comparator b. Planograph c. Sprit level d. None of the above
294. The outside diameter of a 20 teeth 3 module gear is:a. 54 b. 60 c. 63 d. 70
295. Herring bone gear is used for:A. high speed transmission B. noise free transmission C. better load transmission D. none of the above
296. In a right angle transmission by helical gears, the hands of the helix of the gears are:A. same B. opposite C. immaterial D. none of the above
297. Worm drive is always self-locking: true or false
298. Most hydrostatic bearings normally work under:A. const flow system B. const pr system C. const temp system D. const vol system
299. Ball bearings are not generally used in crank shafts of automobiles because:A. of high cost B. of high speed C. cannot be assembled D. none of the above
300. Bronze is used in journal bearings essential to:a. reduce friction b. reduce heat c. eliminate oxidization d. eliminate seizing.
301. The spindle of high precision cylindrical grinder is mounted on:A. ball bearing B. taper roller bearing C. hydrostatic bronze bearing D. needle bearing
302. To accelerate the flow of gases:A. nozzle is used B. diffuser is used C. dia of pipe to be increased D. none of the above will help
303. Hydraulic accumulator:A. acts as an accumulator for dirt B. acts as storage of hydraulic energyC. acts as a pressure relief arrangement D. none of the above
304. When ice which is floating in water, melts, does the level of water:A. goes up B. goes down C. remain the same
305. Hammer blow in pipe happens due to:A. friction in pipes B. change in temperature C. stoppage of flow D. none of the above
306. Temperature rise in fluid flow causes:A. reduction in viscosity B. increase in viscosity C. no effect
307. Ratio between velocity of sound and velocity of any object is:A. prandtl number b. Reynolds number c. Avagadro’s number d. Mach number
308. Cavitation effect in flow occurs due to:a. Excess pressure b. Excess temperature c. Excess flow d. None of the above
309. In electrical locomotives ultimate transmission is by:a. AC motor b. DC shunt motor c. DC series motor d. Synchronous motor
310. Four beams of identical sections and lengths are made of cast iron, aluminium, steel and hardenedsteel. The beams are fixed at both ends, for a uniformly distributed load which will deflect least: a. Castiron b. Aluminium c. Steel d. Hardened steel
311. Geneva mechanism is used for obtaining:a. Intermittent motion b. Accelerating motion c. Continuous motion d. None of the above.
312. Corioles component is associated with:a. Displacement b. Acceleration c. Velocity d. None of the above
313. Effect of increase of outside diameter of a helical compression spring on its rigidity is:a. Increased rigidity b. Decreased rigidity c. No effect d. Dry friction
314. Jominey curve is related to the study of:a. Hydraulics b. Thermodynamics c. Electrical d. None of the above
315. TTT diagram is used in:a. Surface finish b. Heat treatment c. Stress analysis d. Thermodynamics
316. Mehanite is the name given to a type of:a. Alloy steel b. Granite c. Nodular cast iron d. Cast iron
317. Unwanted impurity in molten aluminium is:a. Oxygen b. Carbon dioxide c. Nitrogen d. Hydrogen
318. Carburizing is done:A. For blackening of high carbon steel B. For case hardening of low carbon steelc. For post hardening process to reduce internal stressesd. To increase machinability of high tensile steels
318. Hardness in steel is as a result of:a. Martensitic structure b. Pearlitic structure c. Leduburetic structure d. Austenitic structure
320. Piston of an IC engine is made out of:a. Cast iron b. Steel casting c. Beryllium alloy d. Aluminum alloy
321. Montreal protocol limits the use of Ozone depleting substance
322. The crank shaft of a 300 HP IC engine is:a. Hot forged b. Shell moulded c. Cold forged d. Obtained through investment casting.
323. Rain drop is spherical due to Surface tension
324. Global warming is due to Carbon-di-oxide
325. One ton of refrigeration is equal to 12000 btu/hr
326. For a laminar flow Reynolds flow should be Less than 2000
327. In latent heating a substance changes phase without increase in temperature
328. Degree of saturation is ratio of _______?
329. A pipe friction test shows that, over the range of speeds used for the test, the non-dimensionalfriction factor f, varies inversely with Reynolds No. It can be inferred from above that, ans. Pipe shouldbe smooth.
330. In a rough turbulent flow in a pipe, the friction factor would depend upon?Ans. Pipe diameter and pipe condition.
331. What is the refrigerant used in vapour absorption cycle?
332. Expansion in a vapour compression cycle is an Isenthalpic process
333. What is the work of throttling process? Ans. Expansion
334. What is the material of heat exchanger tubes? Ans. Copper
335. Tachometer is used to measure Speed
336. Mercury is used in manometer because ________?
337. Check valves are used to ensure unidirectional flow
338. Anti-freeze agent used is Ethylene glycol
339. Anemometer can be used to measure _________?
340. Bypass factor of a cooling coil is _________?
341. Aspect ratio of a rectangular duct is the ratio between its _______?
342. The temp that is numerically the same in Fahrenheit & centigrade scales is ________?
343. The loudness of sound depends upon its ________?
344. Dew point is the temperature at which water vapor will undergo ________?Ans. Condensation
345. In inductance _______ leads _______?
346. Power factor is least in ______? a. capacitance b. resistance c. inductance
347. Barometer is used to measure _______?
348. Identify the odd one out a. DIN b. ISI c. JIS d. IIT
349. If the NPSH requirements of a pump are not satisfied it wills _______?
350. Approach of a cooling tower is the difference between temperatures of ________?
351. A parallel flow heat exchanger will perform better than a counter flow heat exchanger. Statewhether this is true or false
352. The index that normally reflects laminar flow in a tube is ______? Ans. Reynolds no.
353. Pressure drop in air duct is influenced by __________? ans. Shape of the duct
354. By increasing the intake air temp, efficiency of IC engine will _______? Ans. decrease
355. The velocity of the sound depends ona. pitch b. quality and pitch c. loudness and quality and pitch d. none of the above
356. Theoretical correct air fuel ratio for petrol a.6:1 b.9:1 c. 10:1 d. 15:1
357. The knock in diesel engine occursA. instantaneous and rapid traverse of first part of the chargeB.Reduction of the delay periodC.instantaneous and auto ignition of the end part of the chargeD.All the above
358. Ignion quality of the diesel fuel oil is measure by index no is calleda. octane b. cetene c. calorific value d. carbon no
359. Carnot cycle maximum efficiency forA. reversible engine b. irreversible c. petrol d. diesel
360. Compressed air coming out of the punctured foot balla. attains atm temp b.remains at same temp c.becomes cooler d.becomes hotter
361. The product of EI isa. flexural rigidity b.section modulus c.polar modulus d.modulus of rupture
362. Which of the following is the thin cylinder?a. boilers b.steam pipes c.water pipes d.all the above
363. Hoop stress induced in the thin cylinder by winding it with wire under tension will bea.0 b.tensile c.compressive d.shear
364. As compared to rivet joint to welded joint has ------ strengtha.higher b.lesser c.either above d.none of the above
365. ------------ gear train is one in which each shaft call as one wheel onlya.simple b.compound c.epicyclic d.none
366. In the clock ----------gear train is used to commonly minute to houra.simple b.compound c.epicyclic d.none
367. If the earth shrinks by half the radius duration of one dayA.4 hrs b.6 hrs c.12 hrs d.24 hrs
368. A tool used in cutting an external thread is calleda. twist drill b.tap c.die d.end mill
369. In ----- moulding green sand is is generally useda. floor b. late c. bench d. it
370. With increase in cutting speed power requirement isa. decrease linearly b.remains constant c.increase linearly d.Unpredictable.
371. What will be the locus of a point on a thread unwound from a cylinder?a. involute b. helix c. straight line d. circle
372. The ratio of no teeth to pitch circle diametera. pitch b. circular pitch c. diametrical pitch d. module
373. Difference between dedendum and addendum isa. backless b.clearence c. flank d. tooth space
374. Compare to air craft air velocity in a rocket isa. 0 b. less c.more d. same
375. -------------is suitable for space travela. turbo jet b. turbo prop c. rocket d. all the above
376. Rain drop is spherical due toA. surface tension B. specific weight C. specific gravity D. all of the above E. none of the above
377. By increasing the intake air temperature, efficiency of an IC engine will generallyA. increases B.decreases C. remains the sameD. increases at the beginning and then decreases graduallyE. none of the above
378. A stone initially at rest is dropped from the edge of a very tall building. Taking acceleration as10m/s2, what was the change in the speed of the stone during the 4th second?a. 10m/s b. 30m/s c. 15m/s d. 40m/s e. None of the above
379. What type of thread is used in lead screw of a lathe?A. acme thread B. V-thread C. square D. buttress E. none of the above
380. In latent heating, a substance involves _________ in phase with _________ in temperature.A. change, increase B. no change, increase C. change, no increase D. no change, no increaseE. none of the above
381. For a cantilever beam with uniformly varying load, shape of bending moment curve isa) Parabolic b) hyperbolic c) Straight line d) cubic e) None of the above
382. Hammer blow in pipe happens due toa) Friction in pipes b) Change in temperature c) stoppage of flow d) All the above e) none
383. Which of the following statement(s) is/are true?a. A parallel flow heat exchanger will perform better than a counter flow heat exchangerb. Montreal protocol (1987) limits the use of ozone depleting substancec. Both (a) and (b) are true d. None of the above is true e. Data insufficient
384. The mercury does not wet with the glass. This is due to the property of the liquid known asa. Cohesion b. Adhesion c. Capillarity d. Surface tension e. both (a) and (b)
385. The increase in hardness due to cold working is known asA. age hardening b. work hardening c. induction hardening d. flame hardening e. none
386. Which of the following methods in welding uses a pool of molten metal?a. Carbon arc welding b. TIG welding c. Submerged arc welding d. MIG welding e. Thermit welding
387. A spark plug gap is kept betweenA. 0.3 to 0.7 mm B. 0.2 to 0.8 mm C. 0.4 to 0.9 mm D. 0.4 to 1 mm E. none
388. Which of the following fuel has little tendency towards detonation?a. Benzene b. Iso-octane c. N-heptane d. Alcohol e. None of the above
389. Which mechanical property a metal should possess to enable it to be mechanically formed?A. ductility b. malleability c. elasticity e. machinability e. None of the above
390. The strain energy stored in a spring, when subjected to maximum load, without sufferingpermanent distortion, is known asa. Strain energy b. Resilience c. Proof Resilience d. Proof stress e. None
391. How many of the following statements may be false?1) The index that normally reflects the nature of flow in a duct is Reynolds number2) One ton of refrigeration is equal to 12000 btu/hr3) Pressure drop in air duct is influenced by shape of the duct4) The viscosity of hydrogen increase with increase of temperatureA. One only b. Two only c. Three only d. All the above e. None of the above
392. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through itsvertex and parallel to the base is __________ than that passing through its C.G. and parallel to the base.a. Nine times b. six times c. four times d. one-half e. one-third
393. A hydrometer is used to measurea. velocity of fluids b. velocity of gases c. flow of fluids d. specific gravity of fluids e. none of these
394. Which law states that change in internal energy of a perfect gas is directly proportional to thechange in temperature?a. Avagadro’s law b. Gay-Lussac law c. Joule’s law d. Newtonian law e. None of these
395. A taper provided on the pattern for its easy and clean withdrawal from the mould is known asA. machining allowance b. draft allowance c. shrinkage allowance d. distortion allowancee. None of the above.
396. Hygrometry deals with moisture content in air
397. 1 kg-m =9.81 J
398. Relation between gauge, abs atm pressures
399. Work-study deals with
400. Time study deals with
401. Expand MIS-Management Information System
402. CPM and PERT deals with determining the status of the project
403. To avoid cavitation in a centrifugal pump inlet pressure should be high
404. Expand NTP- Normal temperature and pressure
405. Dalton’s law of pressure total pressure equals sum of partial pressures.
406. As per Avogadro’s hypothesis molecular wt of all gases occupy the same volume under sameconditions of temp and pressure
407. Use of intercooler- to reduce work input.
408. Use of after cooler to reduce volume of receiver.
409. Water hammer occurs due to sudden obstruction in flow.
410. ABC analysis deals with
411. Main objective behind plant layout isA. to avoid back tracking b. To minimize the space occupied
412. Efficiency of diesel engine as compared to petrol engine under same rated load (high)
413. Which of the following is not present in a CI engine?a. Fuel injector b. Carburetor c. Fuel pump
414. Which of the following is not present in a SI enginea. Spark plug b. Carburetor c. Fuel injector
415. Pour point is (min temp at which a liquid flows at set condition)
416. Zeroth law of thermodynamics
417. In value engg “value” means----------
420. Second law of thermodynamics deals with entropy
421. Mach no deals with------
422. Output=9kW, Input=30kW, Efficiency=? 30%
423. Overall hear transfer co-eff. Present ina) Conduction b) Convection c) Conduction and convection d) All modes of heat transfer.
424. Orifice Definition provision for flow of liquid with regulation
425. Break even point no profit and no loss
426. If a block of ice floating in a tub of water and gets melted then what will be the level of water a.falls down b.rises c. remains the same
427. Compressed air coming out of a punctured footballA) Remains at the same temperature B) becomes hotter C) becomes cooler
428. Heat transfer takes place as pera) Second law b) First law c) Zeroth law
429. Choking in compressor means change in mass flow rate with proportional to Pr ratio, change inmass flow rate with inversely proportional to Pr ratio, fixed mass flow rate regardless to Pr.
430. Formation of frost in refrigeratora) Can be prevented if design is proper b) Heat transfer becomes more c) Heat lossd) Immaterial.
431. Supercharging is the process of increasing the density of the inlet charge.
432. How will you find the unburnt mixture in exhaust gas?a) Analyzing CO b) Analyzing Oxygen.
433. Compression ratio is the ratio ofa) Delivery pr.to inlet pr. b) Inlet pr to delivery pr. c) Stroke volume to clearance volume
434. To reduce moisture troubles the compressor main should bea) Vertical b) Horizontal c) Slanting
435. Critical activity isa) Zero float b) High float c) Low float
436. Cash discounts is based ona) Sold on credit b) Bargaining capacity of the seller c) Payment of instant cash437. 1 kW-hr=3600 kJ.
438. Which process is more effective for compression?a) Isothermal b) Adiabatic c) Polytrophic
439. What did W.H. Taylor do?
440. An adiabatic compression is one in which no heat enters or leaves the system.
441. What happens if the refrigerator doors are kept open? The room will be warmed up gradually.
442. In break even analysis, profit occurs when sales revenue >total cost.
443. In which device, the temp of the refrigerant is the lowesta) Compressor b) Condenser c) Expansion valve d) Evaporator
444. A material piece weighs 2.5 kg in air and 3 kg, when immersed in water, then sp.gr is
445. A body of sp.gr 7 is immersed in mercury of sp.gr 13.6. What percent of the body will be immersedin water? 0.515.
446. 1 tonne of refrigeration is the cooling effect produced when melting one tonne of ice
447. Unit of power Watt.
448. What is the use of the reverse flow of air in compressor?a) Cleaning the dust particles settled b) Velocity of the air flow increases c) pressure increases
449. Rota meter – Flow measurement
450. If we use petrol in diesel engine lot of fuel will remain unburnt.
451. In V belt drive contact is made on a) bottom b) sides c)bottom and sides
452. The intake of air in an air compressor can be had froma) An area nearby coal yard. b) An area nearby a cooling tower. c) A room in which conditioned air ismaintained at 20°C. d) Atm air maintained at 1°C
453. Section modulus of hollow shaft PI/32*(D4-d4)/D
454. Down milling is also called ___________? Climb milling
455. Drilling is an example of ____________? Oblique cutting
456. Section view of ’C’ washer___________?
457. Deflection of simple supported beam carrying UDL _________? 5/384*WL^4/EI
458. Flexible coupling is used because
459. Washer is used to provide ________________? Bearing area
460. Initial tension is considered in 1) Tension springs 2) Compression springs 3) Both
461. Kelvin plank law deals with 1) Conservation of work into heat 2) conservation of heat into work
462. Soldering alloy consists of __________? Tin and lead
463. Why chromium is used in steel alloys? Corrosive resistance
464. High cutting speed is obtained while machining 1) HSS 2) carbide 3) CBN
465. Metal forming is an example of _____________? chipless machining
466. Top rake angle is provided for______________? Easy removal of chip
467. Alloying is done for increased strength and application
468. Why transformer is used in welding 1) to convert AC to AC 2) AC to DC 3) DC to AC
469. Spherical cast iron is getting from Grey cast iron by adding _________? Mg
470. In throttling process Enthalpy__________? constant
471. 70 cc of engine means____________? Swept volume
472. Geneva mechanism is used for______________? Intermittent motion
473. In NC system for profile machining1) Point to point 2) contour motion 3) paraxial motion.
474. In centreless grinding, the grinding wheel and the regulating wheels rotate in the same direction.
475. Centridal distance of a semi circle 4*r/3*pi
476. Highest packing factor: FCC
477. Which chart takes care of control attributes: P chart, C chart, R chart
478. Fixture is used for holding the work piece without disturbing the tool path
479. Code for circular interpolation G 02
480. Order of transmission in a car: EFCPD (Engine Flywheel Clutch Propeller shaft Differential)
481. Reverse gear has less speed because1. More speed is not necessary in reverse gear 2.Steering is difficult in the reverse direction 3.less spaceavailability 4. Design simplification
482. Use of annealing: _____________? To relieve stresses
483. Pulley question: w=f/2
484. Equivalent stiffness of springs in series: k1k2 / (k1+ k2)
485. Deflection=5 mm. stiffness=k. then applied load is 5 k
486. Bevel gear is used in differential.
487. Which of the following uses consumable electrodes? MIG.
488. Alloy used in the manufacture of surgical instruments.Martensitic stainless steel (Chromium steel)
489. Uses of superconductors.
490. What path does double slider crank mechanism follows. (Check if it is Elliptical).
491. Ratio between Brake horse powers to the energy supplied. Brake thermal efficiency
492. Two emfs E1 and E2 are given. Among two lengths one is given. Be clear with the relationbetween ratios of emfs to the lengths across.
493. What is anodizing?
494. What is honing?
495. What is hermoplastic?
496. The value of pressure used in elec resistance welding 2KN
497. Up milling opposite direction
498. Down milling same direction
499. Pump in sewage lobe pump
500. Pump in oil gear pump
501. Heat transfer based on which the law second law.
502. Sum using thermal coefficient of exp to fin stress
503. Critical speed of a shaft is affected by Span of the shaft
504. Starting friction is low in
505. Heat transfer is based on which law (zeroth, first, 2nd, kirchoff)
506. In refrigeration where will temp be max? Between compress and condenser
507. Stoichiometric AF ratio is chemically correct mixture by efficiency.
508. How will u compute performance of diesel eng? bsfc
509. How will u pump sewage water i.e. which pump? Lobe pump
510. How will u pump viscous fluid? Gear pump
511. Honing process: Surface finish
512. If thread angle is increased (mechanical adv decreases)
513. Principal plane condition :( shear stress 0, normal stress max)
514. If refrigerator is opened in a room, fan is also on. What will happen to room temp? Tempincreases.
515. Graft in casting
516. How will u improve resistance?
517. Magnetic compass indicatesa) true north pole b) anionic earth pole c) geographic north pole d) magnetic north pole.
518. For a cantilever beam with uniformly varying load, shape of bending moment curve isa)parabolic b) hyperbolic c) straight line d) cubic.
519. For perfectly elastic bodies, coefficient of restitution is a) 0 b) 0.5 c) 1 d) infinity.
520. For 1st order lever, mechanical advantage is a) <1 b)>1 c) =1 d) none.
521. 18:4:1 in H.S.S represent a) 18tu : 4vn : 1 cr. Other choices r just interchanged.
522. Due to intense braking of an automobile reaction of wheels on roadA. Will be equally distributed to all 4 wheels. B. Will be more at rear wheels C. Inertia will be on thefront wheels. D. Not remember.
523. Thermal efficiency of I.C engines will be a)20-25% b)30-35% c)60-75% d) 45- 55%.
524. when a mass is supported by spring of spring constant k, which is cut in 4 equal pieces and theconnected in parallel way the equilent spring constant is a)k/4 b) 16k c) 64k d) k.
525. when a mass is supported on roof of a elevator and elevator moves with an acceleration of 4.9 m/s2shows a spring reading of 15kg, then the weight of the body is a) 10 b) 15 c) 30 d)20.526. Mass production of bolts and rivets is bya .hot extrusion b .forging c .cold heading d .cold peening
527. why doesn’t mercury stick to glass tubea .cohesive force>adhesive force b .cohesive force<adhesive force c .cohesive force= adhesive forced .none of the above
528. How r bolts and nuts manufactured? A. head stamping b .cold extrusion c .cold peening d .forging
529. Euler’s formula is used for column of length a. >80 b. <80 c. >90 d. >110
530. If a body weighing 40kg floats in water with 40% of volume immersed, the sp.gravity of the bodyis a. 1 b. 0.16 c. 0.25 d.
531. Axial claw clutches a. Disengages b. engages c. engages only with load d. operates only with load
532. If center distance of a involutes mating gear changes then the pressure anglea. Increases b. decreases c. remains unaltered
533. Normalising isA. heated above critical temp and cooled in air. B. heated above critical temp and quenched in oilC. heated below critical temp and cooled in air
535. The best suited material for permanent magnet a. Alnico b. silicon
536. Hooke’s joint is used forA. parallel and intersecting shafts B. non parallel non intersectingC. nonparallel and intersecting D. parallel and non intersecting
537. To have a const.velocity ratio the two gears should have (or) angular velocity of the gear willremain the same if the .......... cuts the line joining ........ at a fixed point law of gearing
538. Which of the following is a loose running fit a. h6f6 b.h6e6 c. h6d6
539. Fahrenheit and centigrade are equal at a.-40 b.0 c. 32 d.100
540. M10 hexagonal bolt is manufactureda. upset forging and thread rolling b. Casting and thread rolling
541. Specific speed in a turbo machine depends on a. geometric shape, b. size, c. head, d. all the above.
542. Unit of surface roughness is a.micron, b. PPM, c. mm2 d. meter
543. Mohr’s circle is used to find
544. Storage, transportation, operation, delay, inspection symbols are used inA. process chart, b. mam m/c chart, c. grant chart, d. all the above.
545. Melting point of ice changes with a. increase with pressure, b. increase with pressure ratio.
546. If the speed of fan is doubled, quantity of air displaced isa. doubled, b.4times, c.1/2 times d. remains same.
547. Which has less carbon content?A. tool steel, b. spring steel, carburising steel, forging steel.
548. When a helical compressive spring is subjected to axial compression load, the stress induced in thespring will be a. tensile, b. compressive, c. shear. d. none
549. For a bar element if area, length, and stress are doubled the elastic strain energy will beA. Half b. doubled c. 4 times d. 8 times
550. For a punching die, 2mm thick sheet, dia. D, force f, the shear force is 8800.
551. Spheroidising is a process ofA. annealing b. normalizing c. tempering d. case hardening
552. What type of thread is used in lead screw of a lathe A. acme thread B. V C. Square D. buttress
553. Wear allowance of a go nogo end plug gauge is given for a.. go end b. nogo end
554. Internal spur gears can be made by using a. Gear shaping b. slotting c. Gear hobbing
555. Height of the capillary varies with A. Increase with increase in dia of tube B. increase with increasein sp. weight C. increase with decrease in dia D. increase with decrease in sp. weight
556. A bolt of nominal diameter 33mm the stress of 100N/mm2 the safe load isA) 60 KN b) 100 KN c) 160 kN.
557. A cylinder with in 1% of the tolerence capacity limit, the permissible tolerence in height and radiusare is 0.2% radius and 0.25 height.
558. In ball bearings cage is used fora. to maintain the ball position b) to maintain parallelism between inner and outer race.
559. Pumped storage plants are used mainly for A. High head b) run off river.
560. For an incompressible solid, poisson’s ratio is
561. Distance of ozone layer from surface of eartha. 0 to 100 km b 20 to 50 km c. 50 to 100 km d. 10 to 15 km
562. An elevator is moving up with an acc. of 4.9 m/sec2 a body weighing 15 kg is attached with springbalance. What is the value in the spring balance a. 10 b. 15 c. 20 d. 30
563. At same heat input and max pressureA. efficiency of otto cycle more than diesel B. efficiency of dual cycle more than dieselC. efficiency of diesel cycle more than otto
564. Bending stress is (y is the distance from the neutral axis)A. inversely proportional to y b. proportional to y c. independent of y
565. If the body is 40% immersed in water what will be its specific gravity
566. The temp at the three edges of a square shaped body is 0 C and on the fourth edge is 100 c find theTemp at the centre of the square a. 25 b. 100 c. 50 d. 0.
567. Machine tool drives are generally given in:a) Arithmetic progression b) geometric progression c) Harmonic progressiond) none of the above
568. Finite element analysis is used ina) Accurate measurement b) stress analysis c) Metallurgy d) none of the above
569. Coolant is generally not used while machininga) low carbon steel b) high carbon steel c) cast iron d) alloy steel
570. Machinability of steel is improved by the presence ofa) nickel b) tungsten c) sulphur d) chromium
571. Negative rake anglea) increases cutting force b) decreases cutting force c) no effect on cutting forced) none of the above
572. The hardest tool material used isa) Coated carbide b) high speed steel c) boron nitride d) diamond
573. Stick slip phenomenon is associated witha) Spindle rotation b) belt drives c) slide movement d) none of the above
574. Gear hobbing isa) Shaping process b) generating process c) forming process
575. Cutting speed of H.S.S tools while cutting low carbon steela) 40m/min b) 250m/min c) 500m/min d) none
576. Cutting speed of carbide tools while cutting low carbon steela) 40m/min b) 250m/min c) 500m/min d) 80m/min
577. Straightness that can be achieved over a length of 300mm by grindinga) 0.005 -0.01mm b) 0.1-0.2mm c) 0.05-0.1mm d) 0.5-0.8mm
578. The circularity that can be achieved by finish turning on a standard centre lathe isa) 0.005-0.008mm b) 0.0-0.08mm c) 0.1-0.2mm d) 0.2-0.3mm
579. Honing can correcta) oviality b) taper C) Straightness of bore d) axial curvature
580. Machine tool sliding surfaces are finish matched bya) surface grinding b)fine milling c) slide way grinding d)scraping
581. Close sliding fit is given bya) H7/g6 b) H7/h6 c) H9/p6 d) H7/k6
582. 60H6 can be achieved bya) Turning b) boring c) Drilling d) internal grinding
583. The displacement accuracy which can be achieved on a jig boring machinea) 5/µm b) 50/µm c) 100/µm
584. Hardness value in cast iron can be measured ina) shore b)BHN c)Rockwell d)none
585. Auto collimator is used to measurea) dia upto 0.001mm b) lengths c) straightness d) Involutes error
586. Surface finish is measured bya) comparator b) planograph c) sprit level d) none
587. The outside diameter of a 20 teeth 3 module gear isa) 54 b) 60 c) 63 d) 70
588. Herring bone gear is used fora) High speed transmission b) noise free transmission c) Better load transmission d) none
589. In a right angle transmission by helical gears, the hands of the helix of the gears area) Same b) opposite c) Immaterial d) none
590. Worm drive is always self-locking a) True b) false
591. Ball bearings are not generally used in crank shafts of automobiles becausea) of high cost b)of high speed c)cannot be assembled d)none
592. Most hydrostatic bearings normally work undera) Constant flow system b) constant pressure systemc) Constant temperature system d) constant volume system
593. Bronze is used in journal bearings essential toa) Reduce friction b) reduce heat c) Eliminate oxidization d) eliminate seizing
594. The spindle of high precision cylindrical grinder is mounted ona) Ball bearing b) Taper roller bearing c) Hydrostatic bronze bearing d) needle bearing
595. To accelerate the flow of gasesa) nozzle is used b) diffuser is used c) dia of pipe to increased d) none of these will help
596. Hydraulic accumulatora) Acts as an accumulator b) acts as a storage for hydraulic energyc) Acts as a pressure relief d) none
597. When ice which is floating in water, melts, does the level to watera) go up b) go down c) remain the same.
598. Hammer blow in pipe happens due toa) friction in pipes b) change in temperature c) stoppage of flow d) none
599. Temperature rise in fluid flow causesa) reduction in viscosity b) increase in viscosity c) no effect
600. Ratio between velocity of sound and velocity of any object isa) prandtl number b) Reynolds number c) Avagadro’s number d) mach number
601. Cavitation effect in flow occurs due toa) Excess pressure b) excess temperature c) excess flow d) none
602. In electrical locomotives ultimate transmission is bya) AC Motor b) DC Shunt Motor c) DC Series Motor d) Synchronous motor
603. Geneva mechanism is used for obtaininga) Intermittent motion b) accelerating motion c) continuous motion d) none
604. Corioles component is associated witha) Displacement b) acceleration c) velocity d) none
605. Effect of increase of outside diameter of a helical compression spring on its rigidity isa) Increased rigidity b) decreased rigidity c) no effect d) dry friction
606. Jominey curve is related to the study ofa) Hydraulics b) thermodynamics c) electrical d) none
607. TTT diagram is used ina) Surface finish b) heat treatment c) stress analysis d) thermodynamics
608. Mehanite is the name given to a type ofa) Alloy steel b) granite c) nodular cast iron d) cast iron
609. Unwanted impurity in molten aluminium isa) oxygen b) carbon dioxide c) nitrogen d) hydrogen
610. Hardness in steel is a s a result ofa) martensitic structure b) pearlitic structure c) leduburetic structure d) austenitic structure
611. Carburising is donea) For blackening of high carbon steel b) for case hardening of low carbon steel c) For posthardening process to reduce internal stresses d) to increase machinability of high tensile steels
612. Piston of an IC engine is made out ofa) cast iron b)steel casting c)beryllium alloy d)aluminium alloy
613. The crank shaft of a 300 HP IC engine isa) hot forged b) shell moulded c) cold forged d) obtained through investment casting
614. A 6kg ball is suspended from two wires of equal length. The angle between the wires is 90degrees. What is the tension in each wire? a. 58.8N b. 41.6N c. 29.4N d. 83.2N
615. A 523 kg experimental rocked sted can be accelerated from rest to 1602 km/h in 1.82s. What netforce is required? a. 4.6X106N B. 4.6X105N C. 1.6X106N D. 1.3X105N
616. A force that averages 984N is applied to a 0.42kg steel ball moving at 13.8 m/s by a collision thatlasts 0.027s. If the force is in a direction opposite to the initial velocity of the ball, what is the finalspeed of the ball? A. 77.1m/s B. 63.3m/s C. 13.8m/s D. 49.5m/s
617. A stone initially at rest is dropped over the edge of a very tall building. Taking g as 10m/s2, whatwas the change in the speed of the stone building during the 4th second?A. 10m/s B. 30m/s C. 15m/s D. 40m/s
618. How long will it take a 2000w motor to lift a 320kg container vertically upwards for 26m?(g = 9.8 m/s2) A. 29s B. 6.3s C. 4.2s D. 4.1s
619. A collision between two isolated items will in generally conserveA. the total kinetic energy and the total momentum of the system.B. the total kinetic energy but not the total momentum of the system.C. the total momentum but not the total kinetic energy of the system.D. the momentum of each object.
620. What is the force exerted on a submarine window of 2m2 area, if the submarine is at a depth of2km below the surface?(the density of sea water is 1.03X103 kg/m3)A. 4.04X107N B. 4.04X104N C. 2.02X104N D. 2.02X107N
621. A body partially floats with 2/3rds of its volume under the surface of a fluid. If the density of thefluid is X kg/m3, what is the density of the body?A. 3/2 X kg/m3 B. 2/3 X kg/m3 C. 14.7 X kg/m3 D. 0.15 X kg/m3
622. How many of the following statements are true:A. the buoyant force on a body depends on the shape of the bodyB. The buoyant force on a body always acts in the same directionC. the buoyant force on a body depends on the mass of the bodyD. The buoyant force on a body depends on the density of the fluid surrounding the bodyA. only one B. only two C. only three D. only four
623. How many of the following statements may be false?A. The pressure in a fluid depends on the density of the fluid.B. The forces due to pressure in a fluid act perpendicular to the surface of a body immersed in a fluid.C. The buoyant force experienced by a body immersed in a fluid depends on the density of the bodyD. The buoyant force always acts vertically upwards on a body immersed in a fluidA. Only one B. Only two C. Only three D. All four
624. How many atoms are present in a mole of CH4?(Avagadro’s number = 6.023X1023 /mole) A. 1.2X1024 B. 3.01X1024 C. 1.2X1023 D. 6.023X1023
625. A power station generates 500MW of power and exhausts 800MW as waste heat into theenvironment. What is the efficiency of the power station?A. 61.5% B. 38.5% C. 62.5% D. 23%
626. How long does it take a 350W coffeepot to boil of 0.7L of water initially at 100°C.The latent heat of vapourisation of water = 2.1X106 J/kg.A. 6.1 min. B. 7.0 min C. 3.9 min. D. 3.1 min.
627. A 16 ohm resistor and 8 ohm resistor are connected in series across a 12V battery. What is thevoltage across each resistor respectively? A. 8V , 4V B. 4V , 8V C. 12V, 12V D. 6V, 6V
628. How many of the following statements regarding sound are true?A. Intensity depends on the square root of the amplitudeB. Loudness only depends on the intensity of a soundC. The pitch of a sound depends on the frequencyD. Sound is reflected whenever a change in acoustic impedance is encounteredA. Only one B. Only two C. Only three D. All four
629. How many of the following statements regarding light are true?A. Light travels in a straight line even when it crosses between two media of different refractive indexB. Infrared light has longer wavelength than ultra-violet lightC. Light can behave both like a ray and like a particleD. It is possible to get a real image with a concave lenses A. Only one B. Only two C. Only three D. All four
630. The pressure p in terms of its mean kinetic energy/unit volume E isa .E/3 b.E/2 c.3E/4 d.2E/3 e.5E/4
631. Convert volumetric to gravitational, relative volume of each constituent of flue gasa. %mw b. xmv c. me d. xsw e. %sw
632. Which is correct for reversible polytrophic process?a. temperature constant b. density constant c. volume constantd. entropy constant e. same heat transfer
633. If a gas or vapour allowed to expand through a minute holea. free expansion b. hyperbolic c. adiabatic expansiond. parabolic e. throttling
634. Minimum work of compressor is possible, when the adiabatic index isa.0.75 b.1 c.1.27 d.1.35 e.2
635. Under ideal condition, isothermal, isochoric, adiabatic and isobaric area. static b. dynamic c. quan-static d. stable e. thermodynamic
636. If a heat engine attains 100% efficiency, then it isA. Zeroth law b. I law c. II law d. no e. all
637. If Q1 is the heat in source, Q2 is the cold sink for heat pump then COPa. Q1 / (Q1- Q2) b. Q2 / (Q1- Q2) c. (Q1- Q2) / Q1
638. The output of diesel engine is increased ifa. more fuel b. flywheel size c. incoming air d. scavenging e. supercharging
639. Accumulation of carbon in the cylinder increases whena. decrease in volume b. volumetric efficiency c. ignition timed. effective compression ratio e. travel time
640. for same power, same speed, flywheel of petrol and diesel engine area. smaller b. greater c. equal d. none
641. If petrol is used in diesel engine, thena. higher knocking b. black smoke c. lot of fuel d. improper combustion.
642. Reciprocating compressor is used fora. large quantity of air at high pressure b. large quantity of air at low pressurec. low quantity of air at low pressure d . low quantity of air at high pressure
643. Lean relation for a. specific gravity b. dynamic viscosity
644. Centre of pressure = centre of gravity when
645. Vortex on whirlpool is due to a. cavitation b. wake c. drag
646. What it is Rupture?647. A belt drive, where pulley dia is double, and then it key length must bea. doubled b. same c. increase the critical length
648. Surface contact in motion is calleda. roll pair b. surface pair c. lower pair d. slide
649. For fluctuating load----------- is useda. ball bearing b. roll bearing c. thrust bearing d. sleeve bearing
650. In pinion and gear design, the design must be made by a. gear b. pinion c. both
651. The plate is severely deformed at a side then it grains becomesa. ductile b. malleable
652. What is recrystallation temperature?
653. What is austempering?
654. Acetylene is staid on --------- form a. liquid b. solid c. compressed
655. Tool life is concentrated on a. cutting speed b. material c. feed or depth
656. Reamer is used for
657. In an ideal gas compared to a real gas at very high pressure occupies?
658. Kinetic theory of gases assumes that collisions between the molecules are?
659. The condition of perfect vacuum that is at absolute zero pressure can be attained at?
660. Specific heat of air?
661. Which law states that internal energy is function of Temperature?
662. Minimum work done for an adiabatic process the value of n?
663. Air Refrigerator works on?
664. When crude oil heated Which Hydro carbon comes first?
665. What is the purpose of Supercharger?
666. 1Kg of carbon to CO, Amount oxygen required?
667. Horse power per tones of refrigeration?
668. Scale formation on the surface of the boiler tubes due to?
669. Axial shift in steam turbine occurs due to?
670. Latent heat of vaporization at low pressure and temperature?
671. Shaft revolving in a bearing which pair?
672. Difference between dedendum and addendum?
673. The fatigue life of a part can be improved by?
674. Rotational tendency of force?
675. The frequency of transverse vibration is 3 Hz then critical speed?
676. Advantage of V belt?
677. In gear boxes which type of key is used
678. A structural member subjected to an axial compressive force is called?
679. Pig iron is produced in which furnace?
680. Heat generation of arc welding is due to?
681. In what angle does an object thrown height will travel the longest distance?
682. Angle of contact between the journal and bearing?
683. The coupling is required to connect two parallel shaft distance between the shaft is small andvariable?
684. Carbon is added to steel to increase its hardness-True/False
685. Wings of airplane are made by Stretch forming
686. To protect from thrust which type of follower is used? Roller follower/mushroom or sphericalfollower.
687. With increase in temperature--- Viscosity of liquid--- Decreases
688. Heavy machine beds are made of CI for Vibration Damping
689. For shock resistance and vibrations we use malleable cast iron.
690. Rupture strength Load/Neck area.
691. Washer is used for increasing bearing area.
692. Surface endurance limit depends on surface finish
693. In a uniformly distributed load of 6n/m over a 5 meter length simply supported beam, the value ofB.M at the point where shear force is zero (17.5/22.5/55/75)
694. Cam size depends on (base circle/pitch circle/prime circle/none)
695. Poisons ratio is higher in (rubber/steel/wood)
696. In drill tool carbon % is (<0.4 %, 0.8% -1.6%, 1-2.5%)
697. Finishing operation in lathe is done at (low speed/high speed)
698. Degree of freedom in super structure (1/positive/negative/zero)
699. Axial compressors follow the process in ideal conditions (adiabatic/isotropic/isothermal)
700. Forced draft has negative pressure drop (true or false)
701. The key used in the gears for transmitting power (flat/saddle/spline/square)
702. Dye penetration test is (pouring/surface tension/capillary/none)
703. Poisson ratio Lateral strain/linear strain.
704. Endurance limit is depending upon Surface finish
705. in which furnace, pig iron is made blast
706. Corrosion resistant material cr and ni
707. Centipoise is unit of viscosity
708. Broaching is made to produce broaching
709. Steady rest is used for supporting long job in lathes
710. Drill angle 118 degree
711. In parson's turbine, relation between angles a1=b2, a2=b1 (a=alpha,b=beta)
712. Refrigerant used in refrigerator R 134a/ Freon
713. Composition of babbit metal? 88 % tin , 8% antimony, 4% copper
714. Cantilever beam failure of surface finish is represented by? triangle
715. At what angle in the valve timing, Diesel engine injection occurs? 20 degree before TDC
716. Name any one non destructive test? laser beam/ utrasonic
717. Clutch is located between? engine and gear box
718. What is the Melting pt of iron? 1539 degree Celsius
719. Name any one Gear material? cast iron , phosphor bronze, alloy steel , carbon steels
720. Drill material composition? 0.8% - 1.6 %
721. Which mechanism is used to hold the gear? ratchet mechanism
722. Reynolds number range for laminar flow –? for flat plate < 5*10^5 ,for pipe < 2000
723. Nusselt (for natural) number is function of which number? grashoff and prandtl number
724. Angle of contact between journal and bearing?
725. What is the function of cutting fluid? cool the tool and the work piece/lubrication/ improvessurface finish
726. Dual cycle combination of which two cycles? otto and diesel cycle
727. In screw jack --------which thread is used? square thread
728. ACME thread angle? 29 degrees
729. Frequency of a system is 3 Hz then find the speed in rpm? 180 rpm
730. For which gear shafts are co-axial? reverted gear train
731. Say true/false:a) in simple gear train every shaft is attached with one simple gear only Trueb) Radiation heat transfer is varied with T to the power of 4. true
732. The velocity of the sound depends ona. pitch b. quality and pitch c. loudness and quality and pitch d. none of the above
733. Theoretical correct air fuel ratio for petrola.6:1 b.9:1 c. 10:1 d . 15:1
734. The knock in diesel engine occursa. instantaneous and rapid traverse of first part of the charge b. Reduction of the delay periodc. instantaneous and auto ignition of the end part of the charge d. All the above
735. Ignition quality of the diesel fuel oil is measure by index no is calledA. octane b. cetene c. calorific value d. carbon no
736. Carnot cycle maximum efficiency fora. reversible engine b. irreversible c. petrol d. diesel
737. Compressed air coming out of the punctured foot ballA. attains atm temp b. remains at same temp c. becomes cooler d. becomes hotter
738. The product of EI isa. flexural rigidity b. section modulus c. polar modulus d. modulus of rupture
739. Which of the following is the thin cylinder?a. boilers b. steam pipes c. water pipes d. all the above
740. Hoop stress induced in the thin cylinder by winding it with wire under tension will bea.0 b. tensile c. compressive d. shear
741. As compared to rivet joint to welded joint has ------ strengtha. higher b. lesser c. either above d. none of the above
742. ------------ gear train is one in which each shaft call as one wheel onlya. simple b. compound c. epicyclic d. none
743. In the clock ----------gear train is used to commonly minute to houra. simple b. compound c. epicyclic d. none744. If the earth shrinks by half the radius duration of one daya. 4 hrs b.6 hrs c.12 hrs d.24 hrs
745. A tool used in cutting an external thread is calledA. twist drill b. tap c. die d. end mill
746. In ----- moulding green sand is generally used A. floor B. late C. bench D. it747. With increase in cutting speed power requirement isa. decrease linearly b. remains constant c. increase linearly d. Unpredictable.
748. What will be the locus of a point on a thread unwound from a cylinder?a. involute b. helix c. straight line d. circle
749. The ratio of no teeth to pitch circle diametera. pitch b. circular pitch c. diametrical pitch d. module
750. Difference between dedendum and addendum isa. backless b. clearance c. flank d. tooth space
751. Compare to air craft air velocity in a rocket isa. 0 b. less c. more d. same
752. -------------is suitable for space travela. turbo jet b. turbo prop c. rocket d. all the above
753. H7-h6 isa. clearance fir b. transition fit c. interference fit d. sliding fit
754. Thread angle of unified thread isa.30 b.40 c.50 d.60
755. The function of ---------------- is to transform input motion of rotation in to out put motion oftranslationa. screw b. bolt c. nut d. key
756. the most important element which control the physical property of steel isa. silicon b. manganese c. tungsten d. carbon
757. Austempering is the heat treatment process used to obtain greatera. hardness b. toughness c. softness d. brittle ness
758. Zeroth law of thermodynamics, Joule’s law, Newton’s 2nd law of rotary motion, Third law ofthermodynamics
759. Coefficient of friction is the ratio of
760. If a body is moving in a circular path, a force comes into the path, which acts along with the radiusof the circular path and is directed towards the centre of the path, what is the force?
761. Gravitational acceleration at a place is 6 times the value of gravitational acceleration at earth. Theweight of the body at that place will be
762. The acceleration of a particle moving with simple harmonic motion (SHM) is maximum,
763. Low grade fuels have
764. In case of exhaust silencer of a petrol engine is partly chocked it is likely to result in
765. Temporary hardness of water is caused by
766. Velocity ratio of a belt is
767. The compression ratio of diesel engine lies in the range of
768. For any thermodynamic process the area under T-s curve represents
769. When the load on CI engine decreases its efficiency increases. This is due to
770. Torque given by engine will be maximum when the engine
771. Decrease in engine speed from no load to full load is
772. Kinematic pair is classified as
773. Isentropic process means
774. A process in which no heat is supplied or rejected is
775. Which of the following are fire tube boilers?
776. The study that deals with man and environment is
777. What is the effect of supercharging on detonation in case of petrol engine?
778. Mode of heat transfer in which there is no change in molecular motion is
779. Effect on efficiency of carnot cycle……….
780. Question on benzon boiler & composite bar
781. In cold and hot rolling which cannot be done? Hollow circular section
782. Pearlite consists of ---------------------? ferrite and cementite
783. In Pert project time=
784. Crank rotates at 4pi radians per second, crank radius 10 cm piston velocity?
785. Path traced by a point on a double slider crank.
786. For maximum economy air fuel ratio in petrol?
787. Orthogonal cutting angle between relative velocity and
788. In grey cast iron -------- welding is used? MIG
789. For chipless machining non conventional method used ------ Laser beam machinig
790. Melting point of steel -- 1000 to1380
791. To increase toughness in steel ----- ? Nickel and vanadium
792. Notch toughness test? IZOD
793. Number of instantaneous centers in four bars mechanism? Six
794. Circle which takes the basic rolling action as that of the gear? Pitch circle
795. Gear train in gear boxes for automobile? Compound
796. Coupling used in perfectly aligned shafts? Rigid flange coupling
797. Time period of a simple pendulum?
798. Euler’s formula for buckling?
799. Cantilever beam deflection with central loading length l?
800. Efficiency of otto cycle depends on ------
801. Ratio of work and heat transfer in polytrophic process?
802. LVDT purpose?
803. Newton’s law of viscosity relatesa) shear stress and rate of deformation b) pressure, viscosity & velocityc) shear stress, viscosity and pressure
804. Fatigue life of a member can be improved by a) Polishing b) shot peening
805. Water droplets falling down assume spherical shape due to ------------ propertya) cohesion b) surface tension c) adhesion
806. Differential gear is used while turning
807. The efficient gear drive isa) helical b) spur c) worm d) bevel e) all the above
808. In a V-Belt, contact will be made only along the sides
809. Ina flour mill, -------- type of drive is used flat belt drive
810. In which process, high accuracy of hole can be achieved?a) drilling b) reaming c) broaching
811. In designing a pulley, shaft and a key, which is made weaker?a) key b)pulley c) shaft d) all have the same strength
812. In compounding of turbines, ------a) Efficiency increases b) Turbine Speed decreases c) to avoid axial shift
813. In bolt tightening, the type of load in the bolt is tensile
814. After grinding, which type of process is used to relieve stress?a) Annealing b) normality c) tempering d) no stress is induced
815. Cast Iron is used in machine bed ways for Damping Vibrations
816. Ideal fluid obeysa) Pascal’s Law b) Newtonian Law c) Bernoulli’s Principle d)Continuity Equation
817. A flat washer has more bearing area
818. Barometer is used for ---------------
819. The material whose property is same in all the materials is isotropic
820. Impact strength is an index of
821. Inventory cost depends upon ---------
822. Which of the following is not a vector quantity?a) weight b)Force c)Velocity d)Acceleration
823. Governor sensitivity w1, w2 given (w1-w2)*2/(w1+w2)
824. Boiling water nuclear plant fuel Plutonium.
825. What is the max shear force in the following?
826. Given the B.M.Diagram, what is the shear force diagram?
827. Hygrometry is used to measure the humidity
828. Buoyancy force acts in met centre of the body.
829. ORN ans. Stack in critical path.
830. Moment of Inertia of shaft pi/64 *d4
831. Rotary Compressors for what? High quantity, low pressure
832. Power of diesel engine
833. What is a function of differential?
834. Expansion of OHC
835. Speed of cam shaft half the crank shaft
836. Which process increase hardness and doesn’t decrease strength?
837. Which of following is boiler accessory?
838. PERT deals with
839. Distance between bore of cylinder and connecting rod bearing is called
840. Swirl is used to
841. Octane rating deals with
842. Motor used for starting an engine
843. DIN is formed from which country?- Germany, US, Austria, Japan
844. Break even analysis is
845. Capital expenses is
846. PERT IS _______ ORIENTED, CPM is ______ oriented
847. In Screw jack, which thread is used
848. Copper sheets are produced by
849. Nozzles are used for _____pr. And _____ velocity.
850. In 6cm cube, how many 1*2*6 blocks are formed?
851. Gantt chart is used for
852. Gang milling means
853. Slippery in ice is due to
854. why rain droplets are spherical in shape
855. why bubbles shines-due to diffraction
856. shim is associated with
857. Priming is done in __________ pump
858. Carburetor implies mixture of
859. Gear box is placed between
860. Stuffing box is used in
861. What is importance of universal motor?
862. Differential and gear box, between them which gear is used
863. Self locking screw means
864. Basic shaft should fall
865. Shaft, pulley, key is designed on the basis of keeping key weaker.
866. Brazing is used for what materials
867. 60cm wheel, 40cm wheel. First wheel moves distance with 280rev., then no of rev. then no. of rev.second wheel moves for same distance
868. Radius =10cm if it is decreased by four what is percentage reduction in area
869. Knocking in SI engine
870. Crank shaft is manufactured by
871. Hot working increases
872. Chromium when added, it increases
873. Annealing is used for improving following property. All of the above
874. Sine bar is used to measure external taper
875. Precision is ___________
876. Module is _______________
877. Rack is _______________
878. Radial distance below the PCD and base circle is ______________
879. Which gear is used for more seed reduction?
880. What type of heat transfer in radiator of automobile?
881. Why scraping of lathe bed
882. In 10MW motor, what is type of cooling?
883. Stator of induction motor, what is type of cooling
884. What is a frictionless bearing?
885. Stress induced on the cycle bearing
886. Second time of the clock increases 5m in day. What should be done on the length of the pendulumbar
887. The difference between the dry bulb and wet bulb temperature
888. Perpetual motion machine second kind
889. What are the thermoplastics?
890. Depression angle of mercury
891. If no resistance is offered in circuit- it implies
892. Power capacitor is a
893. Why Hg is used in the manometer
894. Which material used in EDM
895. Need for distributor
896. Ignition coil is represented by
897. A question on spindle taper----- ans is Morse taper
898. Velocity of fluid particle at the centre of the pipe
899. More than two support continuous beam
900. After the removal load the body does not comes to original stage instantaneously – it implies
901. Antifriction bearing ball bearing
902. Slip gauge’s lowest measurement
903. What is the ring on the bottom portion of the piston?
904. The shafts are connecting two intersecting axis universal coupling
905. II second law of thermodynamics defines ---------- (entropy)
906. Cavitation in cf pump because of low pressure
907. Priming is in cf pump
908. Carburetor mix of fuel + air
909. Carburetor principle - venturi
910. Antifriction bearing?
911. Worm gear is used for-high reduction ratio
912. Break even analysis which is considered-fixed variable
913. Capital expenditure –fixed asset
914. Straddle milling?
915. Tool signature consists of
916. State of refrigeration-condenser (in-vapour out-liquid)
917. Rivet property –it should be hard
918. In center of cf pump which will be more- a. velocity b. pressure c. both
919. In automobile battery will be specified in –volts
920. Gear box location
921. Hardness and toughness is considered while selecting a tool for m/cary and material
922. For transmitting power from gear box to wheels which joint is used-universal joint
923. Surging in compressor?
924. Oldham coupling?
925. In IC engine down rings are-oil rings
926. Water bubble having colour-total internal reflection
927. Spherical shape of droplet is because of –surface tension
928. Backlash in gear
929. Slip gauge accuracy is .001 mm
930. Beams with so many supports-continuous beam
931. Highest friction in load-taper roller
932. Axis same-flange
934. Crank shaft manufacturing –forging
935. Din tolerance-germany
936. EDM tool material
937. Power capacitor is used for
938. Parkenising and anodizing
939. In a drawer, 5 white socks and 8 black socks are there. To draw one pair of socks, minimum no ofsocks that has to be drawn? Ans.3
940. Radius of a cylinder is increased by 30%, then increase in volume will be -------(height isconstant).Ans.69%
941. The mass of a ball is 250 g and velocity is 10m/s.The potential energy at maximum height isAns.12.5 [1/2*M*V2]
942. Work done to lift 80 kg of water to a height of 30 m in 1min is Ans. 0.4 kw
943. A thin wire is subjected to tensile stress. There is no increase in resistance. Then what willhappen? Ans. Temperature remains the same.
944. Resistances in parallel.(6,10,15).Then overall resistance will be Ans.3
945. Stoichiometric combustion requires how many percentage of excess air? Ans.0%
946. The shape of the BMD in a cantilever beam will be Ans. Triangle
947. The dimensional formula for force is MLT-2
948. In connecting rod, what type of bearing is used? Ans.Needle Bearing
949. If ‘a’ is the coefficient of thermal expansion and E is young’s modulus, the-----
950. Corrosion is due to organic effect
951. Capillarity is due to Surface Tension
952. Cavitation occurs when Actual pressure of fluid < Vapour pressue of the fluid
953. At what temp, degree Celsius and Fahrenheit values are the same? -40 degree C
954. Temperature: heat is same asa) IQ: intelligence b) vote: popularityc) Ohm: Resistance d) Speed: distance
955. Cold is related to hot as loyalty to 1) Treachery 2) disgrace
956. Galvanising is coating of Zinc
957. In a Spring damper system, mass is made of quartz. What happens to frequency? 4
958. Annealing is a stress relieving process True
959. 16 C is a grade of ----- Aluminium
960. Resistance to fatigue is endurance. True
961. Relative humidity is a measure of mass of moisture in volume of vapour. False.
962. Dalton’s law-Partial pressure
963. Newton’s Law-Motion
964. Boyle’s Law-Pressure and volume relation
965. Joule’s Law-Mech. Equivalent of heat
966. Kirchoff’s Law-Electric circuit
967. Hooke’s Law-Elasticity
968. Air velocity-Anemometer
969. Stagnation pressure- pitot tube
970. Rpm- Stroboscope
971. Humidity- Hygrometer
972. Furnace temp- pyrometer
973. If a body is at -10 degree C (ice) and if it is to be converted into saturated vapour ,how much heat isnecessary?
974. According to Newtonian Law, shear stress is directly proportional to velocity gradient.
975. In casting molten metal flows through _______. (runner)
976. Which one C% is high?A. 28Cr50 B. 40Cr C. C35
977. What is the type of failure in Key that is used in Flange Coupling?
978. Spring is not subjected to Transverse shear
979. Principal Stress = 1000, -600. What is maximum shear stress?
980. Order of efficiency….. 2 Strokes SI, 4 Strokes CI
981. if Inlet air temp increases, efficiency(petrol engine) increases but compressor efficiency decreasesTrue
982. Specific energy is high?a. Turning b. drilling c. grinding d. planning
983. Dynamic loading which considerationa. Elastic limit b. Poisson ratio c. Yield strength d. Endurance limit
984. Match the following Mohrs circle - Principle stress Martensite - Hard and brittle Phase Degree of freedom - kinetics Section modulus - flexural rigidity Plastic water bottle - blow moulding
985. Which cycle uses two isentropic and two isothermal processes
986. A material is loaded still yield point and the load is removed.a. Increase in yield stress b. Decrease in yield stressc. Unchanged yield stress d. Reaches UTS
987. A thin wire is subjected to tensile load. Temperature is same. The resistance remains constant.
986. Aeroplane is flying at 800 kmph. Air temperature is zero.a. Subsonic b. Supersonic c. Sonic
987. Match Kirchoff law - electrical circuit Dalton’s law - partial pressure Hooks law - elasticity Joules law - work equivalent to heat
988. Natural gas has maximum percentage of methane
989. A perfect gasA. has zero viscosity b. has constant viscosityC. satisfies the relation PV = MRT d. incompressible
990. Density in terms of viscosity isa. kinematic viscosity/ dynamic viscosity b. dynamic viscosity/ kinematic viscosityc. kinematic viscosity x dynamic viscosity d. any of the above
991. Reynolds number for pipe flow is given by:a. VD/v b. VD µ/d c. VD?/µ d. VD/µ
992. A barometer is used to measurea. very low pressures b. very high pressuresc. pressure difference between two points d. atmospheric pressure
993. A Kaplan turbine is suitable forA. high head low discharge b. high head high dischargeC. low head low discharge d. low head high dischage
994. In a centrifugal pump installation while starting, the position of delivery valve isa. fully open b. fully closed c. half opened. d. more than half open
995. An air vessel is provided at the summit in syphon toa. regulate the flow b. increase discharge c. increase velocity d. avoid an interrupt in the flow
996. a material which recovers fully after unloading but not instantaneously is known asa. plastic b. elastic c. partially elastics d. inelastic
997. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as a. hysteresis b. inelasticity c. creep d. boeschinger effect
998. The modulus of rigidity is defined asA. the ratio of true stress to true strain b. the ratio of shear stress to shear strainC. the ratio of longitudinal stress to longitudinal strainD. the ratio of twisting moment to cross sectional area.999. For a thin cylinder the ratio of longitudinal stress/hoop stress is a. ½ b. 1 c. 2 d. 4
1000. If two forces of magnitude P act as an angle . Their resultant will bea. 2P cos /2 b. 2Psin c. 2Pcos d. p cos 2
1001. The angle of projection of a projectile is double the angle of inclination of the plane on which aparticle is projected. The ratio of time of flights on the upward inclined plane and downward inclinedplane will be equal toa. 1/cosa b. 1/2cosa c. 1/sina d. 1/2sina
1002. The equations m d2x/dt2+cdx/dt +kx = 0 representsa. free vibration b. forced vibrationc. periodically forced vibration d. free vibrations with viscous damping
1003. While designing for screw threads care should be taken to provide adequate length of engagementfor the screw and nut threads so as to prevent failure of threads ina. tension b. compression c. torque d. shear
1004. Maximum principal stress theory in applicable forA. elastic materials B. plastic C. ductile D. brittle
1005. For traction applications, the type of motor best suited isa. induction motor b. synchronous motor c. dc shunt motor d. dc series motor
1006. A babbit isa. a eutectic of iron and iron phosphate b. a gadget for measuring volume c. a measure of magneticinduction produced in a material d. antimony bearing lead or tin alloy(ans)
1007. The blow off pressure of a safety valve isa. slightly above atmospheric pressure b. half of the boiler working pressurec. boiler working pressure d. 106% of boiler working pressure
1008. In case of a saddle keyA. the key way is cut in a shaft only b. the key way is cut in both shaft and hubC. the key is welded to shaft d. the key way is cut in hub only
1009. Splines are used whena. the power to be transmitted is high b. the power to be transmitted is lowc. the torque is high d. axial relative motion bet. Shaft and hub is necessary.
1010. A circulating water pump of a condenser is of the centrifugal type and directly connected to athree phase induction motor running at 900 rpm. The pump delivers 30000 litres per min. against thedynamic head of 10m. The horse power of the motor required to drive the pump would bea. 20-30 b. 40-50 c. 50-60 d. 60-70
1011. As per Indian boilers regulations the type of joint preferred for longitudinal joint isa. welded joint b. welded joint which cover plate c. riveted lap joint d. riveted butt joint
1012. Hydraulic testing of boilers is done at pressuresa. below and above atm. b. Slightly above atm.c. At half the working pressure of boiler d. At 1-1/2 to 2 times the working pre.
1013. Rankine formula is valid upto slenderness ratio of a. 60 b. 80 c. 100 d. 120
1014. A shaft is subjected to a torque T and bending moment M. the equivalent twisting moment wouldbe: a. (M2+T2)1/2 b. (M2+4T2)1/2 c. (4M2+T2)1/2 d. (M2+T2)1/2 + (m/2)1/2
1015. The average values of modulus of rigidity for Al, brass, copper, nickel and steel in descendingorder is Al, Ni, Br, copper, steel
1016. Resistance to fatigue of a material is measured by endurance limit.
1017. A solid shaft of 100mm dia transmits 100HP at 450/PI rpm. The torque in kg, m on the shaftwould be a. 250 b. 375 c. 500 d. 750
1018. the critical speed of a shaft is affected bya. diameter of the disc b. eccentricity c. span of the shaft d. all(ans)
1019. In order to avoid interference for 20 pressure and teeth minimum of teeth should bea. 8 b. 12 c. 16 d. more than 18
1020. The phenomenon of elongation and contraction of the bolt is know asa. slip b. creep c. fatigue d. elasticity
1021. In hydro dynamic bearingsa. the oil film pressure is generated by external pump b. the oil film pressure is generated by dead weightof shaft c. the oil film pressure is generated only when the shaft rotatesd. the oil film is sufficiently thick
1022. Which steel will have max percentage of carbon?a. C14 b. C15cr65 c. C20cr18ni20 d. C40cr40
1023. Jaw clutches a. cause shock loads when engaging b. get disengaged at high rpm c. getdisengaged in reverse direction d. are friction clutches which generate heat when engaged
1024. A body which does not contain voids or empty spaces is known asA. continuous body b. an isotropic body c. heterogeneous body d. crystalline body
1025. The limiting load beyond which the material no longer behaves elastically known asA. breaking load b. limiting load c. load bearing load capacity d. elastic limit
1026. If a body has identical properties all over it is known asA. homogeneous b. isentropic c. ductile d. elastic
1027. Cold work is done on the metalA. below the thermal critical range b. above the thermal critical range c. at zero degree centigradetemps. D. after slightly warming the metal in furnace.
1028. A plug gauge is use for measuringa. taper bores b. cylindrical bores c. spherical holes d. screw threads
1029. a master gauge is a. used by masters b. used by all mechanics c. a standard gauge checkingaccuracy of gauges used on shop floors d. a gauge used by experienced technician.
1030. In centre less grinding the work piece advanced by a. push given by operator b. hydraulic force c.force exerted by grinding wheel d. force exerted by regulating wheel (ans)
1031. In climb milling is work moves in the same direction as rotation of the cutter.
1032. The binding material used in cemented carbide tools isa. nickel b. cobalt c. chromium d. carbon
1033. A 250mm diameter is turned at a cutting speed of 20m/min feed 0.5mm per rev. of spindle at aspindle speed of 25rpm now if the dia of workpiece is double and spindle speed is also double the timetaken to turn the job will bea. Four times the original time B. double the original timeC. no change in turning time D. one fourth the original time
1034. The passage way of bringing the molten metal to the mould cavity is known as:a. piping system b. loaming system c. gating system d. entry system
1035. A third flask sometimes used between cope and drag is calleda. riddle b. middle c. fillet d. cheek
1036. Shot blasting is a. process of cleaning moulding sand b. process of cleaning core sandc. process of supplying blast of hot air to cupola d. process of cleaning casting
1037. The function of a transducer isa. to amplify the input signal b. to modify the input signal c. to convert the primary signal into a moreuseful quantity usually an electrical impulse d. to codify the input signal
1038. The method of testing hardness by brinell test is based on the principle ofa. indentation b. penetration c. rebound d. scratching
1039. In thermit welding heat is generatedA. from combustion of gases b. electric arc c. reaction of oxygen with metalD. chemical reaction involving finely divided al and iron oxide.1040. Ultrasonic machining is best suited fora. non ferrous metal b. amorphous solids c. brittle materials d. dielectrics
1041. In EDM the material of the tool is a. satellite b. diamond c. carbide d. high speed steel
1051. Bearing lining is a. bronze b. duralumin c. delta metal d. babbit
1052. The process of cutting thin gears from metal sheets is known asa. extruding b. stamping c. sintering d. rolling
1053. An optical flat works on the principle ofa. polarization of light b. refraction of light c. dispersion of light d. interference light ray
1054. The term CLA is used in connection with: a. surface hardness b. surface finishc. stresses in a component d. average speed of a gear.
1055. Dressing in foundry practice is the process of addition of chemicals to the molten metal toimprove its fluidity
1056. A steel piece after hardening is heated to 300C and then cooled in oil. The property imparted tothe steel piece will be: a. softness b. toughness c. hardness d. annealing
1057. 1 kW hour is the same asa. 1000 joules b. 1000 watt sec c. 3600 watt hours d. 3600,000 watt sec.
1058. The equipment used for pulverizing is known asa. stroker b. burner c. hopper d. ball mill
1059. If (2n-1) divisions on the main scale are equal to n divisions on the vernier scale and if S is thevalue of the smallest division, then least count would be:a. 2n/S b. S/2n-1 c. S/2n d. S/n
1060. Pipes are insulated so that a. the may not break under pressure. b. There is min. corrosion c. Theycan withstand higher fluid pressures d. Heat loss from the surface is minimized.
1061. Elements of Constantain….….
1062. Unit for dynamic viscosity…….poise
1063. What is the cutting speed of HSS single point cutting tool while machining CI a.6m/minb.11m/min c. 22m/min d. 33 m/min
1064. Definition of mach no……... inertia force/elastic force
1065. Subsonic velocity occurs when a. throat b. convergent. C. divergent d. convergent divergent
1066. Bombers are used in a. turbojet b. ramjet c. pulse jet d. turbo propeller
1067. The gradient of any hardened steel. a. marten site. B. pearlite c. austenite
1068. Symbol for total run out
1069. Symbol for pressure relief valve
1070. Escape velocity Ans: 11.2km/sec
1071. Moment of inertia of solid sphere a. 1/2 Mr2 b. 2/3 Mr2 c. 1/8 Mr2
1072. 1 stroke=--------m^2/sec.
1073. AutoCAD window (default) size
1074. 18-4-1 HSS denotes the sequence % of a) tungsten, Cr, Ve b) W, Cr, Mn
1075. 75 cm of mercury= ……………..cm of water
1076. In which process glass is machined………..a) usm b) edm c)ecm
1077. Non consumable electrode use in a) TIG b) MIG c) USM
1078. C, H2 is added in surface in which process a) carburizing b)nit riding c)cyaniding
1079. Degree of freedom of vibration system a) 0 b) 4 c) 2 d) 3
1080. The function of control rod a) absorb the Neutrons b) to prevent the radiation
1081. The fuel used in nuclear thermal power plant a) uranium b) plutonium c) thorium
1082. Compression ratio in motorcar a)5 b)16 c)7 d)13
1083. Cetene no of diesel engine for efficient operation -50, 100,1,20
1084. Hoop stresses is …….circumferential tensile stress
1085. If E is 2 times of rigidity modulus then Poisson ratio will be ----0, 2, 1, 4
1086. If diameter is double the resistance will be -----R/4, R/8, R/2, 2R
1087. Formula coriolisis component------2wr,
1088. Which one is semiconductor material -------germanium, silica
1089. The body rotates around a fixed axis the motion will be-------- rotation, circular,Translation, rotation and translation
1090. Min dia of hole that can be punched…….4TFs/Fc, 4TFc/Fs
1091. The ratio of I.P/B.P………volumetric efficiency, relative efficiency,
1092. In which gear the min axial thrust is available…..worm, herringbone, spur, helical
1093. worm gear commonly used due to ……high speed reduction, easy to M/F, low cost,low power consumption
1094. In which thread stress is induced in one direction ….ACME, buttress
1095. Use of economizer……..extract heat from flue gas, increase the efficiency
1096. PERT technical is ….target based, process based etc
1097. The value means in value Engg…………Total cost of the product, etc
1098. Backlash definition …
1099. Steam bleeding is done to ….extract steam from turbine and heat the feed water
1100. Non positive pump …….centrifugal pump
1101. When rotary compressors are used …………..high discharge low pressure, etc…..
1102. Density of water max at ………0 degree C, 4, 20, 100
1103. When walking on the ice slippery is due to ……..no friction, ice breakage, ice chill, PrIncreases melts the ice
1104. Stainless steel contains for corrosion …..Chromium, Cu, Zn, Ni.
1105. Metal regains its original position after unloading but not instantaneously……elastic,Plastic, anelastic , partially plastic
1106. For ductile material which theory of failure is used……..distortion energy theory, maxprinciple stress theory
1107. Max principle theory is used in which material?1108. For brittle materials which theory of failure?
1109. Standard time ……a) operational time+ allowance+ ideal b) normal time + allowance
1110. Work study means…….
1111. The least amount of material removed in …….lapping, honing, super finishing, grinding
1112. Glazing of grinding wheel due to …….break of bonds, break of abrasive particles,wear of abrasive particles
1113. The size of inlet valve compared to exit valve …….less, more, depending on the applications
1114. Definition for torsional rigidity …….
1115. Stiffness ……..force/unit deflection
1116. In which axis moment of inertia is less…….vertical, horizontal, central, it is not dependent on axis
1117. In case of forming the stress value is ……above yield point within ultimate strength,within proportionality, etc
1118. Spark loss in cycle …….0.1 second, 0.01 s,
1119. the ratio volumetric strain and Poisson ratio
1120. Which polymer is crystalline ………PVC, etc
1121. Shrinkage allowance is high for ……..Brass, CI, etc
1122. No of tolerance grade used in SI ……..18, 16, 21
1123. which one is correct fit indication …….50 H8/g7, H8/g7, g7/H8, H8/g7-50
1124. in which place the millimeter reading is available……Thimble, barrel , anvil, ratchet
1125. Advantage of die casting ………high productivity, high tolerance,
1126. In case of super sonic flow …….the velocity increase with decreasing area, the VIncreases with A increasing, there is no change, none of this
1127. More power required in centrifugal compressor due to …..Air leakage, air I water,Heavy liquid,
1128. Gas behaves as ideal at ……..vacuum, high Pr & High Temp, critical temp
1129. Recystalline temp of steel ………
1130. Specific heat of air…….
1131. Entropy changes with ……internal energy change, Pr & Vol change, change of state, change intemp
1132. In which process max work can be obtained….Const Vol, Const Pr, Const Temp, Const Entropy
1133. In throttling process………is const (enthalpy, entropy)
1134. Reverse joule cycle is ……….(bell coalman cycle, Rankine cycle, bray ton cycle
1135. In vernier caliper class A, B, C classification due to ……range, accuracy, L.C,
1136. Wheatstone bridge is used to measure resistance, low current, high voltage, high current
1137. Dynamometers are used to measure torque
1138. Product layout used in batch prodn, continuous prodn, efficient use of machines.
1139. The locus of the point on the circumference of the circles rolls along the straight lines without slipcycloidal path, involute, epi cycloid
1140. The rocket works on the principle of ________a. Linear moment b. angular moment c. force d. flow
1141. The basic hole is one…… lower deviation is zero, upper deviation is zero
1142. Random errors follow which curve……..hyperbolic, parabolic, causian, scatter
1143. In selective assembly, type of fit used……..string fit, wringing fit, free fit, press fit
1144. While tapping, the size of the hole is drilled…….. Equal to thread dia, less than threadDia, more than thread dia
1145. Use of differential ……….
1146. Which one has high wave length……. Alpha rays, beta rays, x rays, uv rays
1147. QS-9000 is applicable for ______ industriesa. textile b. electronics c. chemical d. automobile
1148. force which acts along the radius of the circle and away from the centre is _____a. centrifugal b. centripetal c. radial d. axial
1149. Life of the tool is affected by _______a. cutting speed b. feed c. depth of cut d. chip thickness e. all
1150. Basic tool in work study isa. stop watch b. bar chart c. process chart d. planning chart
1151. Shaft is subjected to ______ a. torsion b. bending c. axial d. any of the above
1152. Standard metric pitch of M14 is ____ a. 0.80 b. 0.85 c. 0.9 d. 0.95
1153. The cutting tool used for machining HSS is ____ a. carbide b. CBN c. satellite
1154. The parameter for process variation is _______ a. Cp b. Cpk c.pp d. ppk
1155. The system is capable when the value of Cp and Cpk is __a. 1.13 b. 1.43 c. 1.23 d. 1.33
1156. What are TPM, PPM, PPM (regarding quality) and SPM?
1157. What are BIS, APQP, ISO and PPAP?
1158. The point angle of drill is _____ a.120 b. 119 c. 118 d. 117
1159. Outer dia – (2 * module) = ________ a. inner dia b. addendum c. dedendum d. PCD
1160. Draw the symbol for Symmetry, concentricity, Perpendicularity and Circular runout.
1161. (COP) H.P = (COP) R + 1
1162. If spring is cut into two pieces the stiffness will _______ (double)
1163. Wahl stress factor…
1164. Cetene number = ___________
1165. What is brine solution?
1166. Corrosion inhibitor _____
1167. Adiabatic process is _________ ( no heat )
1168. Material for -- cylinder liner; cylinder; piston rings
1169. Compression ratio is = (Vs+ Vc)/Vc
1170. Theory of failure _____1171. What are the TQC tools? (Paretto diagram, histogram, tree shaped diagram, arrow diagram, cost &effect analysis, stratification analysis)
1172. Question on section modulus, Zeroth law of thermodynamics, TTT and stress strain diagram.
1173. The bending moment is maximum at, the shear forceA. Zero B. Changes it’s Sign C. Maximum D. None of the above
1174. The shear force max at, the bending momentA. Zero B. Changes it’s Sign C. Maximum D. None of the above
1175. The max strain energy stored in the body is called as ___________(Resilience)
1176. About proof resilience (max load acting on the spring ---)
1177. The value of Drill bit angle
1178. Another Name of Bell Coleman cycle (ans :reverse carnot cycle)
1179. Petrol dilutes at what temp?
1180. What is pour point?
1181. Pig Iron to be converted to cast iron at what temp?
1182. Chamfering is important in which operation? (Ans: threading)
1183. Which thread gives maximum grip?
1184. Angle between lathe centers? a) 30 deg b) 45 deg c) 90 deg d) 60 deg
1185. What type of material can be machined using HSS tool?(Choice : MS ,Al, Brass)
1186. A combination of pearlite and ferrite gives which type of iron?(Choice: Hard / Very hard / Soft / )
1187. Cutting fluid used for machining alloys (choice: Water, Heavy oil, Sulpurized mineral oil, Solubleoil )
1188. Petrol is rated by ___________(Ans: Octane no)
1189. Fuel consumption in IC Engines is increased due to _____________.
1190. Ultrasonic machining is done for ----(Glass ,Sintered carbide,…etc)
1191. Draught is caused by ______A. Chimney B. Mechanical Fan C. Steam jet D. All the above
1192. The steam occupied in clearance volume is called as________A. saturated steam B. Superheated steam C. Wet Steam
1193. The power produced by a Single acting engine is as compared to Double actingA. engine B. Half C. Double D. Same
1194. Which type of curve is used to represent a stream lineA. 1D B. 2D C. 3D D. None of the above
1195. The ratio of Clearance volume /Swept volume is called asA. Expansion Ratio B. Compression Ratio C. Cut – off Ratio
1196. In Vapour Absorption cycle which type of absorbent is used?A. Ammonia B. Water C. Aqua- ammonia
1197. Advantage of Vapour Absorption CycleA. Cooling rate will be increased B.Less power required
1198. If the carbon steel is heated above it’s critical temp what will happen in it’s grain sizeA. Relatively decreases B. Rapidly increase C. Increase and then decrease
1199. Gear size is measured byA. PCD B. Base circle C. Module D. All the above
1200. Cam size is depends on _____________
1201. In vapour compression cycle the min temp will be in which process.
1202. If we apply a transverse load on a beam what type of moment will be created?
1203. During radial twisting what type stress occur?
1204. In bearing in which direction the thrust occur? Axial Thrust
1205. Taper in lathe spindle?A. 1:30 B. 1:10 C. 1:15 D. 1:45.
1206. Tumbler gear mechanism used in lathe for what purpose?
1027. Which type of tool material is used for hot machining?
1208. The ratio of heat available in the furnace to the heat required to produce steam?
1209. High calorific value of coal?
1210. 1 m3 of water? (1000litre)
1211. The length of divergent portion of the cone when compared to the convergent portion in a venturimeter?
1212. One molecule of oxygen is how many times heavier than one atom of hydrogen.
1213. In diesel engine fuel distribution occurred by?
1214. For aligning two parallel shaft which type of coupling used?
1215. If we increase the compression ratio in IC engines what will happened?
1216. Critical speed of the shaft depends upon what?
1217. Torsional vibration occur when particles of body moves in which direction
1218. When two rotors mounted at the end of the shaft how many nodes will occurs?
1219. After casting which heat treatment process will be done?
1220. In alloy steel which type of cutting fluid is used?
1221. In 24 -40 meter/min cutting speed using HSS cutting tool which type of material can be machined.
1222. Material used for coating the electrode is calleda) protective layer b) binder c) slag d) deoxidizer e) flux
1223. The strength of a properly welded joint as compared to base metala)same b) more c) less d) unpredictable e) two cant be compared
1224. The surface to be machined are marked on the pattern by the following colora) Black b) yellow c) red d) blue e) green
1225. A 20 tonne press implies thata) weight of press is 20 tonnes b) press can handle works weighing upto 20 tonnes c) it can exertpressure upto 20 tonnes d) its foundation should be designed for 20 tonnes e) its turnover in a day is20 tonnes
1226. No lubricant is required when cutting threads ina)tungsten carbide b) mild steel c) titanium d) brass or castiron e) hss
1227. The difference between planner and shaper is that in former casea) tool moves over stationary work b) tool moves over reciprocating work c) tool can machine internalas well as external details d) both tool and job reciprocates e) tool is stationary and job reciprocates
1228. Powder metallurgy techniques are used in production ofa) high carbon tool steel b) HSS tools c) tungsten carbide tools d)twist drills e)ceramics
1229. Drilling is an example ofa) simple cutting b) uniform cutting c) orthogonal cutting d) oblique cutting e)intermittent cutting
1230. Reamer is used to correct thea) size and position of drilled hole b) size and roundness of hole c) finish and position of drilled holed) finish and size of drilled hole e) finish and depth of a drilled hole
1231. The operation of milling two sides of a workpiece simultaneously is calleda) gang milling b) climb milling c) square milling d) straddle milling e) end milling
1232. In which type of milling operation the chip is cut off at thinnest place and the chip thicknessincreases along chip lengtha) Up milling b) down milling c) end milling d) climb milling e) key way milling
1233. A sine bar is specified bya) Its total length b) the center distance between two rollers c)size of the rollers d) the distancebetween rollers and upper surface e) weight of sine bar
1234. Expressing a dimension as 18.3±0.02 mm is the case ofa) Unilateral tolerance b) bilateral tolerance c) limiting dimensions d) all the above e) none of theabove
1235. Gantt chart provides the information about a) material handling b) proper utilization of manpowerc) production schedule d) efficient working of machine e) all the above
1236. All welding symbol - ref: machine drawing book
1237. Father of scientific management
1238. Normalising operation is carried out ina) Furnace b) air c) water d) oil e) controlled atmosphere
1239. Pressure applied in a liquid in all directions will be given by Pascal law
1240. In Piercing and punching clearance will be applied on
1241. Permanent plastic deformation of metals under compression malleability1242. To increase corrosion resistance which will be added?
1243. Cycle used in petrol engine
1244. Use of index pulley
1245. What is resilience?
1246. M20*2 –in this 20 represents what?
1247. One question about isotropic of materials1248. Solder is an alloy consisting of tin and copper
1249. In a cantilever beam point load is applied on free end, where failure will accure
1250. Plastic deformation due to constant load at high temp creep
1251. ABC analysis deals with controlling inventory costs money
1252. Type of hatching is given you having to identify the material - ref: m/c drawing book
1253. Study about combination die, compound die and progressive die.
1254. Cavitation can be avoided in a turbine if:a. the specific speed is low b. No. of blades are kept lowc. vane length is increased keeping the vane loading the samed. Temp. of the incoming fluid is kept as high as possible
1255. Free vortex region is not suitable for low hub-tip ratio compressor stage because:a. reaction near the hub will be low b. Reac. near the hub will be highc. Specific work near the hub will be low d. relative velocity will be very high
1256. If 2 centrifugal blowers are operated in seriesa. volume flow increases, pressure remains same b. volume flow decreases, pressure increasesc. volume flow remains the same, pressure increases d. volume flow and pressure increases
1257. The specific work developed by a turbine depends on:a. peripheral speed of the impeller and the velocity of the fluid b. Density of the mediumc. peripheral speed of the wheel d. peripheral speed of the wheel and the tangential component
1258. Volute casing in a centrifugal blower is employed to:a. collect the fluid b. recover the pressure and also to collect the fluidc. to increase the velocity of the fluid d. increase the specific work of the fluid
1259. Power required to drive a centrifugal compressor is proportional to:a. speed b. cube of the speed c. square of the speed d. does not change with speed
1260. The design efficiency of the pump increases witha. increasing specific speed b. decreasing specific speedc. not effected specific speed d. decreasing specific sped and increasing density
1261. The cavitation in a hydraulic machine is namely due toa. low velocity b. low pressure c. high velocity d. high pressure
1262. Francis turbine part load conditions are obtained by:a. adjusting guide vanes b. adjusting the impeller vanes c. adjusting the impeller speed d.adjusting impeller and guide vanes
1263. Chromotograph is an apparatus used for:a. finding the colour of an object b. control flow of gases c. quantitative and qualitativeanalysis of gaseous product d. finding the density of the particle in a pneumatic conveyor
1264. The rorometer uses the following principle for fluid flow measurement:a. Const. area and variable differential pressureb. variable area and variable differential pressurec. variable area and variable viscosity d. variable area and constant differential pressure
1265. Purpose of feed water treatment is:a. prevent corrosion of steel tube b. prevent scale formation on the tubes by the dissolved impurityc. reduce boiling point of water d. obtain dry steam
1266. if a water pump develops 10 m head on earth, what would be its head if it is operated on moon:a.10/6 m c.>10 m b. 10 m d. none of above
1267. The vaccum efficiency of the condenser is the:a. ratio of partial pressure of steam to absolute vaccum b. ratio of partial pressure of steam to atm.Pressure c .ratio of vaccum developed by the condenser to absolute vaccum d .ratio of partial pressureof steam to the absolute pressure in the condenser
1268. In the temperature entropy plot:a. Constant Temp. and pressure lines are parallel b. constant volume line is steeper than the const.Pressure line c. constant volume coincides with the constant pressure line d. constant pressure lineis steeper then the constant volume line
1269. For determining the fatigue life a. Max. Principal stress is the factor b. Max. Compressivestress is the factor c. Max. Tensile stress is the factor d. Max. Shear stress is the factor
1270. 2 identical specimens one with rough surface finish and other with fine finish, having identicalsmall notches are subjected to same reverse bending load:a. life of smooth specimen is more b. life of rough specimen is morec. both will have same life d. lives are not related
1271. Rotary compressors are used for delivering:a. small quantities of air at high pressure b. large quantities of air at high pressurec. small quantities of air at low pressure d. large quantities of air at low pressure
1272. In an axial flow compressor the ratio of pressure in the rotor blades to the pressure rise in thecompressor in one stage is known as:a. work factor b. slip factor c. degree of reaction d. pressure coefficient
1273. The Kinematic viscosity is thea. ratio of absolute viscosity to the density of the liquidb. ratio of density of the liquid to the absolute viscosityc. product of the absolute viscosity and density of the liquidd. product of absolute viscosity and mass of the liquid
1274. A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order toa. slow down the speed of fast moving neutrons b. control the reac.c. reduce the temperature d. extract heat from nuclear reaction
1275. In a nozzle, the effect of supersaturation is to:a. decrease dryness fraction of steam b. decrease specific volume of steamc. increase the entropy d. increase the heat drop
1276. Elastic ratio for a material is defined as_________
1277. Raleigh flow is known as ___________
1278. The vent valve provided in a centrifugal pump is ____
1279. Volute casing in a centrifugal pump is employed to ____
1280. For a elastic material yield point is defined as ________
1281. Mohr’s theory of failure is applicable to _______ a. elastic b. brittle c. ductile d. none
1282. Rotary compressors are used for __________
1283. Heat transfer in boundary layer is due to ________
1284. Lubricating grease is a mixture of _________
1285. Kaplan turbine is used for _______- (head)
1286. _________ cycle is used for refrigeration cycle.
1287. __________ pump is used when the viscosity of the liquid is more.
1288. Centrifugal head can be increased by increasing the _____
1289. Ultimate strength in shear compared to tension is _____
1290. Kinematic viscosity is ______
1291. Enthalpy entropy diagram is ______
1292. Nuclear fusion is _____
1293. Rainbow is due to ______
1294. Vacuum efficiency of a condenser is ______1295. Francis turbine is used for _________
1296. Which is not NDT _____- ( tensile testing)
1297. PITOT TUBE is used for ______________________ (Measuring Velocity)
1298. Rotary compressor is used for_____________
1299. Hydraulic Radius is_______________
1300. Hydraulic Diameter is_________
1301. What will happen after Nuclear Fusion? to atoms join together to form on Nuclei
1302. In Grinding rotation of wheels ( Same / Opposite Direction)
1303. If __________ cycle is reversed it can be used for Refrigeration. (Carnot)
1304. In a room refrigerator operating at a full efficiency if kept open what will happen to roomtemperature?
1305. In a two tank A & B having 2 liquids Water & Kerosene .The tank A has two 1cm dia outlets andtank B has one 2 cm dia outlet. Which will empty soon?
1306. Yield point in stress strain curve is _______________
1307. Parallel flow Vs Cross flow Heat Exchanger.
1308. Cavitation can be avoided in turbine by__________
1309. Double pipe heat exchangers are preferred when?
1310. Cavitation in pipe is caused by______
1311. After the emission of alpha particles Neutron to Proton Ratio is_______
1312. ____________is used for peak load plantNuclear PP b. Solar PP c. Thermal PP d. Wind PP e. Hydel PP
1313. If earth has no atmosphere what will happen to Earth’s Temp?
1314. Wire of Resistance 10 ohm, Length is increased 3 times, Same Density, What is new resistance?(Depends on L/A ratio) Ans. 90 Ohms
1315. Transformer Primary – 4000 Turns, 2.5 kV, and Secondary – 250 V, what is no of turns inSecondary coil? (Ans. 400)
1316. Mean coil dia of the spring is 0.8 cm, No of turns 5, wire dia 0.01cm, Length of the coilis_________?(Ans. 12.6 cm)
1317. Valve used for supplying oil to the burner in the boilerIsolation Valve b. Needle Valve c. Non Return Valve d. Relief Valve e. Butterfly Valve
1318. JIT is for _________(Ans. Inventory Control)
1319. Water is flowing in a 5 cm dia pipe line at a velocity of 10 m/s, the pressure drop across orificemeter in a water line is 2 cm of Hg. If the mercury is replaced by a liquid and immiscible with water thepressure drop will be ________(Ans 17 cm)
1320. Steam separator in thermal power plant is used for________
1321. V belts touches on a) side b)both side and bottom
1322. Thermal power plant uses a) Rankine cycle b) Otto Cycle
1333. Geneva Mechanism used for a) Continuous b) intermittent
1334. Which is the poor conductor a. silver b)copper c)al d)carbon
1335. Increasing hard ness by cold working a. work hardening b. Cold hardening c. hothardening
1336. Which can be used for high speed application a. hss b. cementite carbide
1337. Gantt chart used for
1338. Permanent joint is a. rivet b. bolt c.nut
1339. Centigrade and Fahrenheit is coincide a.-40 b.32 c.-32
1340. Harden material is a. hss b. cbn c. cementite carbide
1350. When the ice melts what is the water level remains same
1360. Diesel fuel quality measures by cetene number
1361. Feet analysis used for stress analysis
1362. Bomb colorimeter used to measure the CV of a. liquid b. Solid c. solid and liquid
1363. On astembering the structure formed is bainite
1364. Testing of material in the presence of notch a) impact strength
1365. Brass is an alloy of a. cu & zinc
1366. Which can be drawn in to wires a. cu b.tin c. steel
1367. When white cast iron is cooled the product formed is a. malleable ci b. spheroidal c.Gray ci
1368. Case hardening done for a. low carbon steel b. high c steel
1369. Washers is used for
1370. Cold working is decrease fatigue strength
1371. Softest alloy of steel a. bearlite b. austentite c. martensite
1372. To reduce knocking in si engine is to add a. tetra ethyl lead b.. Methyl iso…
1373. Heating steel above appear critical temp and cooled in air is normalizing
1374. P/a = (22/7)^2*e*(l/k)^2 l/k stands for slenderness ratio
1375. Solder is an alloy of lead and tin
1376. Alloying element is added to steel a. to increase strength b. to reduce cost
1377. Coolant is used to a. increase e tool life b. Reduce heat during machining
1378. No of instantaneous center is n*(n-1)/2
1379. Cutting speed is more for a. cbn b .carbon1380. Annealing is a process of
1381. Austermpering is a process of
1382. Springs are connected in parallel 1/k=1/k1+1/k2+…
1383. Antifriction bearing is
1384. Powder metallurgy is done by
1385. ISO 9001stands for
1386. A core drill is done in previously drilled hole
1387. In compound drawing ‘O’ refers toa.) Circularity b.) Concentricity. C.) cylindrical d.) None
1388. in engineering drawing one has to checka.)Dimensional accuracy b.) Errors c.) Neatness d.) all
1389. Wankel engine is rotary engine
1391. In a rectangle diagonal are 410. Area cannot be determined.
1392. Major composition of stainless steel is Chromium.
1393. Sand is mainly Silicon dioxide.
1394. A pair of dice is thrown. What is the probability of getting sum of odd numbers?(Answer - 0.5)
1395. Austenite constitutes Gamma iron
1396. Thermal conductivity of steel is greater than cast iron
1397. Fixture is work holding device
1398. Density of steel is less than cast iron.
1399. Value of Pi is 22/7or 3.1416
1400. Max. deflection of a beam with U.D.L in simply supported beam WL3 / (48EI)
1401. Coupling of right hand & left hand thread turn buckle.
1402. Critical speed of shaft depends on natural frequency.
1403. Surface hardening is done by (carbursing, nitriding, flame hardening,)Answer-all
1404. 8 men and 4 women 4 task finished in 16 hours. 4 men 8 women 7task finished in 32hours. How many men are required to commit 3 tasks in 8 hours? 16 men
1405. In a class 28% are from other states. Of remaining 25% are from rural areas. What is thepercentage of students who come from urban area? 51%
1406. A tractor costs rupees 2 lakhs. Given a loan at 16% rate of interest at margin of 25%. He paysRs.40, 000 after one year. How much is the balance. Rs.1, 34,000
1407. A train is moving away from the stationary man at 33 m/s with a frequency of 1200 Hz. What isthe observed frequency if the velocity of sound is 330 m/s? 1090 Hz
1408. What is meant by super elevation? (Rail elevation)
1409. Size of a room is 4m X 3.5m X 3m. How many box of size 21cm X 25cm X 25cm can be stacked?3200 boxes
1410. If a principal amount is doubled in 8 years in compound interest, what is the ratio of interest? 9%
1411. A stone is dropped from a height. It’s velocity depends on height
1412. Damping force in freely vibrating with negligible velocity and directly proportional todisplacement.
1413. External threading can be done bya.) Milling b.) Rolling c.) Single point tool d.) all above.
1414. If an Exponential is ex =0.25. In exponential distribution average value is x.log 0.25.
1415. Size of the bolted joint depends on tension.
1416. Gear hobbing is used for all type of gears not bevel gears.
1417. Front and side view of an object is triangle. Cone and pyramid.
1418. External thread cutting is done with cutting and forming
1419. Boat running in a still water at 15km/hr upstream crosses 40km (refer)
1420. Velocity of a planet when it is nearest to star is 10 km/s farthest velocity is 2.5km/hr. ratio of thefarthest to nearest distance is 1:4.
1421. A crank pressure is maximum at ¾ of the stroke
1422. Mechanical dimension is length, mass & time
1423. In Rockwell hardness machine in which scale maximum load can be applied A, B , C 50 an 150kg C scale
1424. What is Trepanning? Making large holes by removing metal along the circumference of ahollow cutting tool
1425. Which is important for drawing a gear a. base circle b. pitch circle c. all the above.
1426. Hardenability means Ease with which the material can be hardened
1427. Gear system in which axial thrust is absent. Herringbone
1428. In which casting complex shapes can be made? Investment Casting
1429. Inert gas is used in which types of welding TIG / MIG
1430. Function of a Differential Gear to allow rotational speed variation of a wheel while taking aturn
1431. Which is superfinishing operation a. planning b-Honing c, shaper d. End milling
1432. Difference between nut and screw. Nut can be used in through hole but Screw can not be usedin through hole & Nut can be used only along with the bolt but screw need not be.
1433. What is stud? Used for aligning components. It is screwed to one of the part
1434. Normal value of voltage in spark plug & distributor function. 10 to 20000 V
1435. What do you understand by Wankel engine? Wankel engine – Rotory Engine (No Pistons)
1436. Lubricating grease consists ofa. fatty oil, mineral oil,& additives b. fatty oil, soap & additivesc. mineral oil, soap & additives d. mineral oil and additives.
1437. In which of the following work piece moves and tool remains stationarya. Planing b. shaping c. milling d. drilling.
1438. Which tool has multiple cutting edges? Miller / Broaching tool
1439. Seamless pipe is made by ___________ process. Extrusion
1440. Meaning of overdrive. Speed of the driven member is greater than the prime mover
1441. What is ISO 9000 standard for quality. Quality Management & Quality Assurance standards
1442. Unit of surface tension. N/m
1443. Which pipe material is used for carrying corrosive liquid?a. stainless steel b.nickel pipe c. chromium pipe
1444. For batch production of automotive components which lathe is preferreda. captive lathe b. turret lathe c. CNC
1445. In centre less grinding the two wheels rotates ina. same direction b. opp direction
1446. To get deep hole in less tensile strength material which drilling is preferred step drilling
1447. Definition of Broach? Process of producing keyways or slots in a single stroke
1448. In which part of the lathe the honing operation is done? a. chuck b. lathe bed c. tail stock
1449. What is the thread angle for ACME thread? 290
1450. Which diameter is kept in mind while roughing the top face of gear teeth?
a. pitch b. base circle c. addendum d. deddendum.
1451. Which is ferrous material? a. inconel b. carbon steel c. monel
1452. What is lapping? Super finishing process to obtain good surface finish
1453. The axial stress on a member which is subjected to a sudden load when compared to load appliedgradually is a. same b. double c. half d. quadraple
1454. Annealing affects which property of materiala. ductility b. hardness c. machinability d. both b& c
1455. Austempering affects what property of material. Improve toughness & Ductility
1456. Which process cannot be used to produce external threads?forging b. Rolling c. milling d. turning
1457. The crystalline structure of graphite isa. Simple cubic b. FCC c. BCC d. HCP
1458. JIT means: Just In Time - inventory control
1459. Manometer sensitivity of a given area depends on cross section area at that point
1460. Which of the following has lowest thermal conductivity?a. steel b. SS c. Bronze d. copper
1461. Dissimilar metals can be joint by a. brazing b. welding c. soldering
1462. Tapering of deadend of tailstock is measured bya. taper gauge b. sine bar c. vernier d. ring gauge
1463. Hygrometry deals with Moisture content in air
1464. Which material has the highest Cp value? a. air b. water c. copper
1465. Relation between gauge, abs & atm pressuresAbs pressure = Atmospheric Pressure + Gauge Pressure
1466. An object weighs 3kg in air, 2.5kg in water, what is its density?
1467. Time study deals with Time taken to complete one operation
1468. Expand MIS Management Information System
1469. CPM and PERT deals with determining the status of the project
1470. To avoid cavitation in a centrifugal pump Inlet pressure should be high
1471. Expand NTP Normal temperature and press
1472. Dalton’s law of pressure Total pressure equals sum of partial pressures
1473. What is Avogadro’s hypothesis Molecular wt of all gases occupy the same volume under sameconditions of temp and pressure.
1474. What is the use of intercooler? to reduce work input
1475. What is the use of after cooler? To reduce volume of receiver
1476. Water hammer occurs due to sudden obstruction in flow
1477. ABC analysis deals with Inventory Control
1478. Main objective behind plant layout is to avoid back tracking
1479. Efficiency of diesel engine as compared to petrol engine under same rated load High
1480. Which of the following is not present in a CI engine a. Fuel injector b. Carburetor c. Fuel pump1481. Which of the following is not present in a SI engine a. Spark plug b. Carburetor c. Fuel injector
1482. What is pour point? Min temp. at which a liquid flows at set condition
1483. Zeroth law of thermodynamics when two bodies are in thermal equilibrium individually withthe third body the two bodies are in thermal equilibrium with each other
1484. In value engineering “value” means Functional or Utility / Cost
1485. What is Mach no c/a
1486. Output=9kW, Input=30kW, Efficiency=? 30%
1487. Overall hear transfer co-eff. Present in Conduction and convection
1488. Definition of Orifice provision for flow of liquid with regulation
1489. What is Break even point. No profit and no loss
1490. If a block of ice floating in a tub of water and gets melted then what will be the level of watera. falls down b. rises c. remains the same
1491. Compressed air coming out of a punctured footballa. Remains at the same temperature b. Becomes hotter c. Becomes cooler
1492. Heat transfer takes place as per a. Second law b. First law c. Zeroth law
1493. Choking in compressor means fixed mass flow rate independent of the pressure ratio
1494. Formation of frost in refrigerator Immaterial
1495. Supercharging is the process of increasing the density of the inlet charge
1496. How will you find the unburnt mixture in exhaust gas? Analyzing Oxygen
1497. Compression ratio is the ratio of Delivery pr. to inlet pr.
1498. What is the material used in permanent magnet? ALNICO
1499. Critical activity has Zero float
1500. At what temperature °C and °F are the same?
1501. 1 kW-hr = 3600 kJ.
1502. Which process is more effective for compression? isothermal
1503. What did W.H. Taylor do? Taylor theory of gauging
1504. An adiabatic compression is one in which no heat enters or leaves the system
1505. What happens if the refrigerator doors are kept open? The room will be warmed up gradually
1506. In which device, the temp of the refrigerant is the LowesCompressor b. Condenser c. Expansion valve d. Evaporator
1507. In break even analysis, profit occurs when sales revenue >total cost
1508. A material piece weighs 2.5 kg in air and 3 kg, when immersed in water, then sp.gr is2.5 / 3
1509. A body of sp.gr 7 is immersed in Hg of sp.gr 13.6. What percent of the body will be immersed inwater? 0.515
1510. 1 tonne of refrigeration is the cooling effect produced when melting one tonne of ice
1511. Unit of power in SI System. Watt
1512. Which of the following does not form a real image?Concave b. Convex c. telescope d. microscope
1513. What is the use of Rota meter? Flow measurement
1514. If we use petrol in diesel engine lot of fuel will remain unburnt
1515. The intake of air in an air compressor can be had from Atm air maintained at 1°C
1516. If v=220V, I=25A, power factor=0.8, freq=400Hz. If the motor runs for 3 hrs, what is the powerconsumed?
1517. Power stroke in diesel cycle is what process? Adiabatic process
1518. Boiling point of mercury?
1519. When salt is added to water, what happens to its freezing point? Increases
1520. What motor do they use in railway engines for traction? DC Series motor
1521. What motor is used for running lathe spindle? AC Motor
1522. Type of magnetic material used for small motors. ferromagnetic
1523. If the barometer shows 300mm Hg, what is the absolute pressure?
1524. Which gear type does not have axial thrust? Herringbone
1525. Which of the following is not a thermal radiation law? Lamberts law
1526. In which units sound is measured? Decibels
1527. Velocity of sound at sea level?
1528. Which of the following is formed due to the attraction between moon and earth? Tides
1529. Instrument used for measurement of high temperatures? Pyrometer
1530. Thread used in lathe lead screw? ACME Thread
1531. If two forces of magnitude P act as an angle$. Their resultant will bea. 2P cos /2 b. 2P sin c. 2P cos d. P cos2
1532. The angle of projection of a projectile is double the angle of inclination of the plane on which aparticle is projected. The ratio of time of flights on the upward inclined plane and downward inclinedplane will be equal toa. 1/cosa b. 1/2cosa c. 1/sina d. 1/2sina
1533. The center of gravity of circular cone lies on the axis at a height from base:a. H/4 b. H/3 c. 3h/4 d. 3h/5
1534. The slope of constant pressure line on temperature entropy diagram is give bya. S/T b. T/S c. Cf/T d. T/Cf
1535. The fact that the product of pressure and volume of a fixed amount of gas is of approximatelyconstant value is known as:a. Charle’s law b. Gay lussac’s law c. Dalatons law d. None of the these
1536. The net work done in a polytrophic process is equal to? P1V1 – P2V2/(n-1)
1537. For a reversible adiabatic process the change in entropy isa. Zero b. Minimum c. Maximum d. Infinite
1538. Otto cycle consists of the set of processes asa. Two isentropic and two constant volumes b. Two isentropic and two constant pressures.c. Two adiabatic and two isothermal d. Two isothermal and two constant volumes.
1539. In a 2 stroke engine we get one power stroke ina. 180 degree of crank rotation b. 270 degree of rotationc. 360 degree of crank rotation d. 540 degree of crank rotation
1540. Latent heat isa. Heat that does not follow first law of thermo dynamicsb. Heat required to change the substance from solid to gaseous statec. Heat required to change the state of substance from liquid state to solid stated. Heat required to change the state or condition under which the substance exists
1541. The vapour pressure is related to the enthalpy of vaporization in;a. Clausius clapeyron equation b. Henrys law c. Raoults law d. Maxwell’s equation
1542. An optical pyrometer work on the principle ofa. Expansion of fluids b. Change of electrical resistancec. Thermo electric effect d. Mono chromatic radiation
1543. Octane number of petrol generally available is in the rangea. 10-25 b. 25-60 c. 20-75 d. 80-100
1544. On a psychometric chart sensible heating or cooling is represented by:a. A horizontal line b. A vertical line c. Inclined line d. Curved line
1545. Dry ice isa. Free from water b. Free from dissolved air or gasesc. Does not contain impurities d. Solidified form of carbon dioxide
1546. A diffuser is used toa. Increase velocity and decrease pressure b. Increase velocity as well as pressurec. Decrease velocity and increase pressure d. Decrease velocity as well as pressure
1547. Air fuel ratio for a gas turbine is closer to a. 10:1 b. 15:1 c. 20:1 d. 60:1
1548. Chocking isa. Variation of mass flow rate in proportion to pressure rationb. Variation of mass flow rate in inverse proportion to pressure rationc. Fixed mass flow rate regardless of pressure rationd. None of these
1549. Kinematics of machines deals witha. Apparatus for applying mechanical powerb. Number of inter related partsc. The forces acting on the parts of the machined. The relative motion between the parts neglecting the consideration of the force.
1550. Dynamic of machines deals witha. The relative motion between the parts, neglecting the consideration of forcesb. The forces acting on the parts of the machine.c. The apparatus for applying mechanical powerd. The number of inter related parts, each having a definite motion
1551. A cycle chain is a kinematic chaina. Yes b. No c. Yes, provided the links are limited in numberd. Yes, provided the distance is limited
1552. The total number of instantaneous centers for a mechanism of n links is :a. N b. N/2 c. N(n-1) d. N(n-1)/2.
1553. The number of links in a pantograph is equal toa. 3 b. 5 c. 4 d. 6
1554. In a cam and follower mechanism, for the uniform velocity of the follower, the displacementcurve will havea. No slope b. Constant slope.c. Slope in positive direction only d. Slope in both positive and negative direction
1555. A point on a link connecting double slider crank chain traces aa. Straight line path b. Circular path c. Parabolic path d. Elliptical path
1556. The number of instantaneous centers for a four bar chain mechanism would bea. 3 b. 4 c. 5 d. 6
1557. The maximum efficiency along an inclined plane is? 1- sin?/1+sin?
1558. Can simple band brake be made self energizing typea. Yes b. Yes, but with few limitationsc. Yes, but will require several modifications d. No
1559. The function of a governor isa. To control the engine speed b. To maintain the speed of engine constantc. To maintain constant piston speed of engined. To maintain the speed of an engine within prescribed limits of varying loadconditions
1560. If n1 and n2 are the max. And min. Equ. Speeds then sensitiveness of governor would be a.N1+n2/2n1 b. N1+n2/2n2 c. N1-n2/2n1 d. N1-n2/2(n1+n2)
1561. The advantages of involute profile over cycloidal are given below. Identity if there is any incorrectstatementa. The straight the teeth of the basic rack for the involute profile admits of simple toolsb. The profile for the flank and face is a single curve in the involute systemc. The variation in the center distance within limits does not affect the two mating gears in the involutesystem d. The interference is inherently absent in this system
1562. The differential gear in the automobiles is used toa. Reduce speed b. Assist in changing speedc. Provide jerk free movement of vehicle d. Help in turning
1563. A vibrometera. Indicates vibration amplitude b. Indicated vibration frequencyc. Indicates nature of vibrations d. Only indicates second and above harmonics
1564. Hammer blow in locomotives resultsa. Pulsating torque b. Uniform torquec. Tendency to lift wheel from rails d. Uneven speed
1565. Simply supported beam of length L with a concentrated load acting on the mid span. If the massof beam is negligible compared to the mass acting, the naturall frequency of the system would be?(48EI/ml3)1/2
1566. The abbreviation P.I.V. drive system stands fora. Polar inertia Vee belt b. Purely intergral variancec. Perfectly induced velocities d. Positive infinitely variable
1567. A swinging field type dynamometer isa. Torsion dynamometer b. Transmission type dynamometerc. Friction dynamometer d. Electrical dynamometer
1568. What is the process used to get soft core and hard case? Case Carburizing
1569. By which process we get more hard and wear resistant surface?a. Nitriding b. Chrome plating
1570. What is the formula for output power? 2πNT/60000
1571. Radius of gyration is proportional to….a. 1/m b. m c. sq. root of m/a d. sq.root of I/m Ans. d
1572. How to increase the surface finish?a. increase speed of work piece b. Increase depth of cut c. Both
1573. Allowance given in casting is to accommodate taper….. Distortion
1574. Material for machine bed? CI
1575. Material of aircraft wings? Aluminium
1576. Based on which factor(s) we have to select a bearing? Comp & Fatigue strength.
1577. Modulus of elasticity? Stress/Strain
1578. Which of the following material has anisotropic property? Aluminium
1579. Shaft diameter depends on______________
1580. Stroboscope is used for measuring?a. Rpm of the spur gear. b. Temperature calibration. c. Velocity of the reciprocating engine. d. All theabove. e. None of the above.
1581. A ball tied at the end of a flexible inelastic string of length l is making S.H.M in vertical plane. Atthe mean position the mass has Max K.E and min. P.E
1582. A block of steel is loaded by a tangential force on its top surface while the bottom surface is heldrigidly. The deformation of block is due to shear only
1583. Controlling force in a centrifugal type of governor is provided only by combination of deadweight and spring
1584. The bolts in a flange coupling are designed under shearing stress caused by torque transmitted
1585. The advantage offered by multiple plate clutches as compared to single plate clutch is less radialspace requirement
1586. The cost of mechanical drives increases in this order flat belt, v-belt, chain, Gear
1587. The density of fluid varies with change of temperature
1588. A soap bubble has a spherical shape because a sphere will have minimum surface area for agiven volume
1589. A liquid in atm of air begins to boil when vapour pre. Of liquid slightly exceeds the airpressure
1590. The phenomenon of surface tension of liquid causes liquid surface to contact
1591. Mercury is used as barometric fluid because of its high density
1592. Variations of pressure and volume at constant temperature are correlate through
1593. A gas is so expanded in a cylinder that its temperature remains constant. Several values ofpressure and volume are recorded. Volume is plotted as ordinate and inverse of pressure as abscissa. Theresulting curve will be
1594. An engine receives 15152J/s of heat and produces 5kW of power. The efficiency of the engine is27.5
1595. An engine operating on diesel cycle is more efficient than an engine operating on otto cyclebecause compression ratio is higher in diesel engine than in engine operating on otto cycle
1596. The entropy principle states that the entropy of an isolated system remains constant
1597. H7-h6 isa. clearance fir b. transition fit c. interference fit d. sliding fit1598. Thread can be formed by all process excepta. Forging b. rolling c. Milling d. Turning
1599. Thread used in screw jack, lead screw?
1600. Which is not related to thermal radiation?a. planck law b. steffan boltzmann law c. Fourier law
1601. Radiator type used in bus?
1602. Definitions of normalizing, tempering, quenching, etc.
1603. Normal hardness value of cast iron used in lathe bed. In BHN
1604. In which process material is not removed? a. punching b. coining c. tapping d. embossing
1605. Which type of transmission drive is Noiseless – (Belt drive/ Gear/ Chain)
1606. Which type of gear gives less noise? (Worm / Helical / Spur)
1607. Relation between speed & diameter.
1608. Which is more thicker? (SWG10, SWG16, SWG20)
1609. Which bearing can withstand both thrust & radial?
1610. What type welding is used for Aluminum?
1611. Critical stress of column is proportional to?
1612. __________allowance is allowed in taper castings.
1613. Toughness is a measure of ….….?
1614. Deflection of spring is predominantly due to spring index.
1615. How will you measure the Hardness of Rubber (Vickers / Brinell)
1616. What type of material is used for machine bed?
1617. Which of the following is antistatic material? (MS / Steel / Brass / Al)
1618. Carbon is added to steel-to increase? Hardness
1619. Guideways are hardened by which hardening method?
1620. Carbon is added to engine parts to enhance-------- property.
1621. A metal has K temp gradient and 2K for another metal. If a hot fluid is passed through a pipe thepipe should be made up ofa. K inside, 2K outside. b. 2K inside, K outside c. Any of the above d. None of the above.
1622. Crowning of pulley is done for?
1623. If temp increases viscosity of gas & liquid ---------------.
1624.. Shear angle in press tool? To avoid burr, easy shear