TEST 1: Kinematics1. ME Board October 1999

It deals only with the motion of bodies without reference to the forces that cause them.A. KineticsB. MotionC. KinematicsD. Acceleration

2. ME Board October 1999Progressive change in position of a body is called;A. Acceleration B. MotionC. ForceD. Momentum

3. ME Board April 1998Cam in general may be divided into two classes; uniform motion and _____ motion cam.A. ReverseB. GravityC. DeceleratedD. Accelerated

4. ME Board October 1997Product of mass and linear velocity is known as;A. ImpulseB. Linear MomentumC. Angular MomentumD. Impact

5. ME Board April 1997It is the motion of an object diminished or decreased speed. A. DecelerationB. Retarded MotionC. Negative ImpulseD. All of these

6. ME Board October 1996It is the property of matter, which causes it to resist any change in its motion or state of rest.A. BrakeB. FrictionC. InertiaD. Impulse

7. ME Board October 1996If the velocity of mass is the same all the time during which motion takes place is called;A. DecelerationB. Uniform MotionC. AccelerationD. None of these

8. ME Board October 1996Statement that a given body is an static equilibrium means that the body cannot;A. A many type of motionB. Be acted upon by more than one forceC. Undergo any DisplacementD. have any type of acceleration

9. ME Board April 1996It is a science of motion that can be solved in terms of scalar and vector algebra.A. KinematicsB. Curvilinear translationC. ProjectileD. Acceleration

10. ME Board October 1995An object thrown upward will return to earth, the magnitude of the terminal velocity equal to;A. ZeroB. ½ the initial velocityC. Twice the initial velocityD. Initial Velocity

11. ME Board October 1993

The follower reciprocates or oscillates in a plain perpendicular to the axis of the rotation of the cam.A. Radial CamB. Cylindrical CamC. Cam CurvesD. Tangential Cam

12. ME Board October 1993The follower reciprocates or oscillates in a plain parallel to the axis of the rotation.A. Cam CurvesB. Cylindrical CamC. Tangential CamD. Radial Cam

13. ME Board October 1993A cone formed by elements, which are perpendicular to the elements of the pitch cone at the large end.A. Cone distanceB. Back coneC. Root coneD. Cone center

14. ME Board April 1992The ability of moving body to perform work is called;A. Internal energyB. Potential energyC. Kinetic energyD. Flow work

15. A slider crank chain is made up of ______.A. One turning and one sliding pairB. One turning and two sliding pairsC. Two turning and one sliding pairD. Three turning and one sliding pair

16. A Scott-Russell mechanism is made up of;A. Rotating pair onlyB. Sliding and turning pairsC. Turning and rotary pairsD. Turning pair only

17. Ackerman steering gear is made up of;A. Rolling and sliding pairs B. Rolling pairsC. Sliding and rotary pairsD. Turning pairs

18. A cam where the follower reciprocates or oscillates in a plain parallel to the axis of the cam is called;A. Circular camB. Cylindrical camC. Reciprocating camD. Tangential cam

19. Instantaneous center of rotation of a link in a four bar mechanism lies on;A. A point obtained by intersection of extending adjoining

linksB. Left side pivot of this linkC. Right side pivot of this linkD. Any of the choices above

20. A vector quantity that describes both how fast it is moving and the direction in which it is heated;A. AccelerationB. DisplacementC. Motion D. Velocity

21. Which of the following is the rate at which the velocity is changing?A. AccelerationB. LinearC. MotionD. Velocity

22. The direction of the ______ is toward the center in which, the study moves.A. Centripetal accelerationB. Centrifugal accelerationC. Radial cam

D. Tangential23. It is the device that changes the magnitude, direction or mode

of application of a torque or a force while transmitting it for a particular purpose.A. FrameB. MachineC. MechanismD. Structure

24. The process of obtaining the resultant of any number of vectors.A.B. Vector CompositionC. Vector QuantityD. Vector resolution

25. It has magnitude, direction and sense.A. Scalar quantityB. Absolute quantityC. Vector quantityD. Relative velocity

26. A plate, cylinder or other solid with a surface of contact so designed as to cause or modify the motion of the piece.A. CamB. DiskC. GearD. Pulley

27. When acceleration is zero, theA. Velocity is constantB. Velocity is negativeC. Velocity is variableD. Velocity is zero

28. When velocity is changing, the acceleration isA. ConstantB. Not constantC. VariableD. Zero

29. Klein’s construction is used to determine the A. Acceleration of various partsB. Angular acceleration of various partsC. displacement of various partsD. Velocity of various parts

30. Klein’s construction can be used whenA. Crank has a uniform angular accelerationB. Crank has a uniform angular velocityC. Crank has a non-uniform angular velocityD. B and C above

31. The cam angle isA. The angle subtended by live portion of a cams centerB. The angle of rotation of a cam for a definite

displacement of the followerC. The angle subtended at the cam center by the portion of

the cam during which the follower movesD. The angle subtended by the cam at the cam center

when the follower dwells32. The pitch point on a cam refers to

A. Any point on pitch curveB. A point at the distance equal to pitch circle radius from

the centerC. The point of cam pitch circle that has that has the

maximum pressure angleD. None of the above

33. For a kinematics chain to be considered as mechanismA. None of the links should be fixedB. One link should be fixedC. There is no such criterionD. Two links should be fixed

34. Hart mechanism has how many links?A. 4B. 6C. 8D. 12

35. Peaucellier mechanism has how many links?

A. 4B. 5C. 6D. 8

36. A cam with a roller follower would constitute which type of pair?A. Closed pairB. Higher pairC. Lower pairD. Open pair

37. Kinematics pairs are those pairs that haveA. Elements of pairs not held together mechanicallyB. Point or line contact between the elements when in

motionC. Surface contact between the two elements when in

motionD. Two elements that allow relative motion

38. A pantograph is a mechanism havingA. Higher pairsB. Lower pairsC. Rolling pairsD. Spherical pairs

39. The number of links of a pantograph is equal toA. 3B. 4C. 5D. 6

40. In elliptical trammels;A. All four pairs are turningB. One pair turning and three pairs slidingC. Three pairs turning and one pair slidingD. Two pairs and two pairs sliding

41. The Klein’s method of construction for reciprocating engine mechanismA. Enables determination of Coriolis componentB. Is a simplified form of instantaneous center methodC. Is based on acceleration diagramD. Utilizes a quadrilateral similar to the diagram of

mechanism for reciprocating engine42. If a particle of a link has a velocity that changes both in

magnitude and direction of an any instant, thenA. It must have only unidirectional accelerationB. It must have two components of acceleration e.g. ,

centripetal and tangentialC. It must have three components of acceleration e.g. ,

centripetal, centrifugal and tangentialD. It must have three components of acceleration e.g. ,

centripetal, centrifugal and gravitational43. Select the one that has the higher pair

A. Crosby indicator mechanismB. Hart’s straight line mechanismC. Thompson indicator mechanismD. Both gearing mechanism

44. A shaft revolving in a bearing forms A. Cylindrical pairB. Higher pairC. Lower pairD. Sliding pair

45. The total number of instantaneous center for a mechanism of N links is equal toA. 2NB. (N-1)(N+1)C. 2N (N-1)D. N (N-1)/2

46. A kinematics chain needs a minimum ofA. 2 link and 2 turning pairsB. 3 links and 3 turning pairsC. 3 links and 2 turning pairsD. 4 links and 4 turning pairs

47. For kinematics chains formed by lower pair, the relation between the number of joint J is given by

A. L = 2/3 (J+2)B. L = 3/2 (J+2)C. L = 2/3 (L+2)D. J = 3/2 (L+2)

48. In case of an elliptical trammel, A. 1 pair turns and 2 pairs slideB. 2 pairs turn and 2 pairs slideC. 2 pairs turn and 1 pair slideD. All 4 pairs turn

49. Coriolis component of acceleration is found in A. four bar mechanismB. Mechanism of steam engineC. Higher pairD. Whitworth-quick-return mechanism

50. It is one that is not appreciably deformed by the action of any external force or loadA. Rigid bodyB. StructureC. FrameD. Mechanism

TEST 2: Stresses1. At a given section of an I beam, the maximum bending stress

occurs at theA. Maximum shear stress areaB. Neutral axisC. Web joint near the flangeD. Outermost

2. The resultant of two or more forces is aA. Couple of forcesB. Concurrent of forcesC. MomentumD. Resolution of forces

3. Two or more forces acting together, could be replaced by a single force with same effect in a mass called;A. Couple of forcesB. Resolution of forcesC. ResultantD. Concurrent of forces

4. The frictional forces defends on coefficient of friction andA. TorqueB. Weights of objectC. Normal of forceD. Moment

5. Shear modulus is also known as;A. Shear elasticityB. Poisson’s ratioC. Modulus of elasticityD. Modulus of rigidity

6. the maximum stress induced in a material when intermittent or repeated load without causing failure is called:A. Ultimate stressB. Endurance limitC. Ultimate strengthD. Elastic limit

7. Internal stresses exerted by the fibers to resist the action of outside force is called:A. Shearing stressB. Tensile stressC. Ultimate stressD. Compressive stress

8. Alloy steel axle under repeated load/stress will eventually fail if the load/stress is above the endurance for the steel under consideration. The endurance limit of the steel is thereforeA. Equal to the allowable stress of the modulus of elasticityB. Equal to half of the ultimate strengthC. Equal to module of elasticityD. Equal to 80% of the elastic limit

9. Moment of inertia is called:A. Modulus of elasticityB. Weep strengthC. Radius of gyrationD. None of these

10. Deflection of a beam is A. Proportional to the modulus of elasticity and moment of

inertiaB. Proportional to the load imposed and inversely to the

length squaredC. Inversely proportional to the modulus of elasticity and

moment of inertiaD. Inversely proportional to the weight imposed times the

length11. Continuous stretching under load even if the stress is less

than the yield point is called:A. PlasticityB. ElasticityC. CreepD. Ductility

12. It is the opposite direction of parallel forcesA. ConcurrentB. CoplanarC. CoupleD. Non coplanar

13. The ratio of the moment of inertia of the cross section of the beam to the section modulus isA. Equal to the radius of gyrationB. Equal to the area of the cross sectionC. Measure of a distanceD. Dependent on modulus of elasticity of beam measure

14. The differential of the shear equation is which of the followingA. Bending moment of the beamB. Tensile strength of the beamC. Slope of the elastic curveD. Load of the beam

15. Could be defined as simply push and pull is known asA. WorkB. ForceC. InertiaD. Power

16. The changes in shape or geometry of the body due to action of a force on it is called deformation orA. Shearing stressB. StressesC. Compressive stressD. Strains

17. Ability to resist deformation under stress is calledA. PlasticityB. All of theseC. StiffnessD. Toughness

18. The property of the material relates the lateral strain to longitudinal strain is calledA. StressB. StrainC. Poisson’s ratioD. Endurance limit

19. The single force which produces the same effect upon a body as two or more forces acting together is calledA. Resultant forceB. Co-planar forceC. CoupleD. Non co-planar force

20. The ability of metal to resist crushed is calledA. Shearing strengthB. Compressive stressC. Torsional strengthD. Tensile strength

21. Finding the resultant of two or more forces is calledA. Co-planar

B. Non co-planar forcesC. CoupleD. Composition of forces

22. In general, the design stress and factor of safety are related as followsA. Design stress = ultimate stress times factor of safetyB. Design stress = ultimate stress divide by factor of safetyC. Factor of safety = design stress divided by ultimate

stress D. Ultimate stress = factor of safety divided by design

stress23. Stresses that are independent to loads are known as

A. Working stressesB.C. Residual StressD. Shear stresses

24. The ratio of unit lateral deformation to unit longitudinal deformation is calledA. Poisson’s ratioB. Willan’s lineC. Modulus of elasticityD. Deformation

25. Separate forces, which can be so combined are calledA. Non-concurrent forcesB. CoupleC. Combined forcesD. Concurrent forces

26. Endurance strength is nearly proportional to the ultimate strength but not withA. Yield strengthB. Design stressC. Shear stressD. All of these

27. The three moment equation may be used to analyze aA. Tapered columnB. Continuous beamC. Endurance limitD. Tensile stress

28. Poisson’s ratio is the ratio ofA. Shear strain to compressive strainB. Elastic limit to compressive strainC. Lateral strain to longitudinal strainD. Elastic limit to proportional limit

29. The product of the resultant of all forces acting on a body and the time that the resultant actsA. Angular impulseB. Angular momentumC. Linear impulseD.

30. The systems of forces and opposite collinear forces are added, which of the following if any is true?A. Equilibrium is destroyedB. Equilibrium is maintainedC. None of these is trueD. An unbalance of moment axis

31. What is the property of the material, which resist forces acting to pull the material apart?A. Shear strengthB. Tensile strengthC. Torsional strengthD. Compressive strength

32. What is the metal characteristic to withstand forces that causes twisting?A. Torsional strengthB. Modulus of elasticityC. Twisting momentD. Elasticity

33. The unit deformation is calledA. TorsionB. StrainC. Stress

D. Shear34. The total amount of permanent extension of the gage length

measured after specimen has fractured and is expressed as percentage increase of the original length.A. ElongationB. StrainC. StressD. Elastic limit

35. Strength of a material is that of a stress intensity determined by considering the maximum test load to act the original area of the test specimens calledA. Yield pointB. Ultimate strengthC. Break strengthD. Elastic limit

36. The maximum stress, which is reached during a tension test is calledA. StressB. ElasticityC. StrainD. Tensile strength

37. Which of the following is the differential of the shear equation?A. Bending momentB. Load on the beamC. Tensile strength of the beamD. Slope of the beam

38. The change in length per unit original length isA. StrainB. StressC. DeformationD. Elastic modulus

39. The ability of material or metal to resist being crushed isA. Fatigue strengthB. Bending strengthC. Torsional strengthD. Compressive strength

40. The ability of metals to withstand loads without breaking down is termed asA. StrainB. StressC. ElasticityD. Strength

41. The ability of a metal to withstand forces that causes a member to twistA. Shear strengthB. Tensile strengthC. Bearing strengthD. Torsional strength

42. The ratio of stress to strain within the elastic limit is calledA. CreepB. Modulus of rigidityC. Modulus of elasticityD. Poisson’s ratio

43. The last point at which a material may be stretched and still return to its un deformed condition upon release of the stress.A. Rupture limitB. Elastic limitC. Proportional limitD. Ultimate limit

44. The deformation that results from a stress and is expressed in terms of the amount of deformation per inch.A. ElongationB. StrainC. Poisson’s ratioD. Elasticity

45. The internal resistance a materials offers to being deformed and is measured in terms of applied load.A. StrainB. ElasticityC. Stress

D. Resilience46. The maximum stress induced in a material when subjected to

alternating or repeated loading without causing failure.A. Ultimate strengthB. Yield strengthC. Endurance strengthD. Rupture strength

47. The maximum stress to which a material may be subjected before failure occurs is called.A. Rupture strengthB. Ultimate strengthC. Yield strengthD. Proportional limit

48. The total deformation measured in the direction of the line of stress.A. StrainB. ElasticityC. ElongationD. Contraction

49. The total resistance that a material offers to an applied load is calledA. Friction torqueB. StressC. RigidityD. Compressive force

50. The ability of metal to withstand forces thus following a number of twist.A. Shear strengthB. Bearing strengthC. Endurance limitD. Deformation

Test 5

1. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of degrees/foot of length.a. 0.004 to 0.006b. 0.08 to 1c. 0.006 to 0.008d. 0.008 to 1

2. For universal joint shaft angle should be degrees maximum and much less if in high rotational speed.a. 12b. 16c. 15d. 14

3. It is a good design practice for steel line shafting to consider a limit to the linear deflection of inch/foot length maximum.a. 0.050b. 0.010c. 0.020d. 0.060

4. It is a rotating machine member that transmits power.a. Camb. Platec. Shaftd. Flywheel

5. A stationary carrying pulleys, wheels and etc. that transmit power called:a. Axleb. Propeller shaftc. Turbine shaftd. Machine shaft

6. A line shaft is also known as:a. Counter shaftb. Jack shaftc. Main shaftd. Head shaft

7. Which of the following shaft intermediate between a line shaft and a driven shaft?a. Counter shaftb. Jack shaftc. Head shaftd. All of the above

8. Short shaft on machines are calleda. Core shaftsb. Head shaftsc. Medium shaftsd. Spindles

9. For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress isa. Constantb. Maximumc. Minimumd. Zero

10. Criteria for the limiting torsional deflection vary from 0.08 per foot of length for machinery shafts to per foota. 1°b. 2°c. 3°d. 4°

11. For transmission shafts the allowable deflection is one degree in a length of diametersa. 10b. 15c. 20d. 25

12. An old rule of thumb for transmission shafting is that the deflection should not exceed of length between supporta. 0.01 in. per footb. 0.02 in. per footc. 0.03 in. per footd. 0.04 in. per foot

13. In general for machinery shafts, the permissible deflection may be closer toa. 0.02 in/ftb. 0.01 in/ftc. 0.002 in/ftd. 0.030 in/ft

14. The speed at which the center of mass will equal the deflecting forces on the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft turns.a. Critical speedb. Geometrical speedc. Mean speedd. Unit speed

15. For shaft, minimum value of numerical combined shock and fatigue factor be applied in every case to the computed bending moment isa. 1.0b. 1.3c. 1.5d. 1.8

16. It is suggested that the design factor of yield strength be about 1.5 for the smooth load, about 2 to 2.25 for minor shock loads, and when the loading reverses during operationa. 3.0b. 4.0c. 3.5d. 4.5

17. A column is called short column whena. The length is more than 30 times the diameterb. Slenderness ratio is more than 120c. The length is less than 8 times the diameterd. The slenderness ratio is more than 32

18. For a circular shaft subjected to torque the value of shear stressa. Is uniform throughoutb. Has maximum value at the axisc. Has maximum value at the surfaced. Is zero at the axis and linearly increases to a

maximum value at the surface of the shaft19. The compression members tend to buckle in the

direction ofa. Axis of loadb. Perpendicular to the axis of loadc. Minimum cross-sectiond. Least radius of gyration

20. A reinforced concrete beam is considered to be made up ofa. Clad materialb. Composite materialc. Homogenous materiald. Heterogeneous material

21. The column splice is used for increasing a. Strength of the columnb. Cross-section area of the columnc. Length of the columnd. All the above

22. A simply supported beam has a uniformly distributed load on it, the bending moment isa. Triangleb. Parabolac. Semi-circled. Rectangle

23. The power obtained by piston reaches flywheel through the a. Countershaftsb. Crank shaftsc. Transmission shaftsd. Line shafts

24. There are two types of crankshafts, namelya. Single piece and built upb. Forged and turnedc. Rotary and stationary

25. Engine valves get open by means ofa. Cam shaftb. Rocker shaftc. Crank shaftd. Valve guard

26. The value of allowable stresses which are generally used in practice for main transmitting shafts isa. 282 kg/cm3

b. 423 kg/cm3

c. 599 kg/cm3

d. 620 kg/cm3

27. The value of allowable stresses which are generally used in practice for line shafts carrying pulleys isa. 150 kg/cm3

b. 282 kg/cm3

c. 423 kg/cm3

d. 550 kg/cm3

28. The value of allowable stresses which are generally used in practice for small short shafts, countershafts isa. 282 kg/cm3

b. 599 kg/cm3

c. 650 kg/cm3

d. 750 kg/cm3

29. Torsional deformation in transmission shafts should be limited to in 20 diametersa. 1 °b. 2°c. 3°d. 4°

30. Lateral deflection caused by bending should not exceeda. 0.001 in per foot of length

b. 0.005 in per foot of lengthc. 0.01 in per foot of lengthd. 0.05 in per foot of length

31. Front axle should be lived anda. Weakb. Deadc. Strongd. None of these

32. The steering is coupled to the two front wheels by means of aa. Connecting rodb. Tie rodc. Push rodd. Spindle

33. In the overdrive transmission system the rotation speed rest higher than that of engines speeda. Main shaftb. Crank shaftc. Propeller shaftd. Machine shaft

34. A slip joint the length of the propeller shafta. Increaseb. Decreasesc. Keeps appropriated. None of the above

35. The transmission system incorporates clutch, gear box, and propeller shaft anda. Brakeb. Differentialc. Steeringd. Main shafting

36. The lay shaft moves the primary shafta. Equal tob. More thanc. Less thand. In the gear ratio

37. The main shaft is lifted the lay shafta. Beforeb. Afterc. Parallel tod. Adjacent to

38. In the top gear, the rotational speeds of remain the samea. Primary and lay shaftsb. Main and lay shaftsc. Primary and main shaftsd. Secondary and main shafts

39. The primary and lay shafts rotate in directiona. In the sameb. Differentc. Reversed. None of the above

40. It is an integral part of a machinea. Spindleb. Axlec. Counter shaftd. Machine shaft

41. Stresses in shafts are analyzed througha. Torsional b. Bendingc. Axiald. All of these

42. What is the standard stock length?a. 16 ftb. 20 ftc. 24 ftd. All of the above

43. Centrifugal separators that operate at speeds also employ these flexible shafts.a. 1000 to 3000 rpm

b. 5000 to 10000 rpmc. 15000 to 30000 rpmd. 20000 to 50000 rpm

44. Which of the following materials used for shaftinga. AISI 3240b. AISI 3150c. AISI 4063d. AISI 33000

45. The process of redistributing the mass attached to a rotating body in order to reduce vibrations arising from a centrifugal forcea. Shaft couplingb. Shaft balancingc. Shaft hooperd. Stator balancing

46. In many cases the of the shaft is an import design featurea. Deflectionb. Rigidityc. Sized. Strength

47. Commercial shafting is made ofa. Low carbon steelb. Cast ironc. Brassd. Bronze

48. What is the most common material for shafting?a. Wrought ironb. Cast ironc. Mild steeld. Aluminum

49. Cold drawing produces a shaft that hit rolling, but with higher residual stresses.a. Weakerb. Strongerc. Harderd. None of the above

50. Allowable stresses in shear equal to are common in design of a shafta. 3000 to 5000 psib. 4000 to 6000 psic. 5000 to 8000 psid. 6000 to 10000 psi

Test 6

1.A type of coupling that allows slight amount of torsional angular flexibility due to introduction with some elastic material cylindrically wrapped around the bolts in the flange.a. Simple bonding elastic couplingb. Elastic material bushed couplingc. Elastic material bounded couplingd. All of these2. Which of the following keys that is square or flat and tapered with head?a. Pin keyb. Saddle keyc. Gib-head keyd. None of the above3. What are considered as the most common keys?a. Flat keysb. Square keysc. Saddle keysd. A & B above4. A key may either straight or tapered. It is usually a drive fit.a. Pin keyb. Saddle keyc. Gib-head keyd. None of these

5. A key with of the several patented methods of keyed into a hole that is small enough to close the slit, assembled in radial direction.a. Fit keyb. Saddle keyc. Roll pind. Pin key6. Kennedy keys are also known as.a. Tangential keysb. Normal keysc. Saddle keysd. Roll pin7. A key shaft that allows the hub to move along the shaft but prevents the rotation of the shaft.a. Woodruff keyb. Feather keyc. Gibbs keyd. Square key8. Which of the following type of fits use for involute splines?a. Close fitb. Press fitc. Sliding fitd. All of these9. Used for permanent fits and are similar to involute splines except that the pressure angle is 14.5 deg.a. Separation loadb. Stub serrationsc. Spline shaftd. Involute serrations10. In the case of knuckle joint, the pin is most likely to fail ina. Compressionb. Shearc. Tensiond. Double shear11. In case of sunk key,a. The key is cut in both shaft and hubb. The key way is cut in hub onlyc. The key way is cut in shaft onlyd. The key way is helical along the shaft12. Splined shafts are generally fora. Aircraftsb. Automobilesc.d.13. Splines are used whena. The power to be transmitted is lowb. The power to be transmitted is highc. The torque is highd. Axial relative motion between shaft and hub is necessary14. Which key normally used in wristwatches?a. Kennedy keyb. Sunk keyc. Tangent keyd. None of the above15. If a square key and shaft are to be of the same material and of equal strength the length of key would be equal toa. db. 0.75 dc. 1.2 dd. 1.5 d16. A type of key that is used in self-aligning machine key made by a side milling cutter in the form of a segment of a disk.a. Kennedy keyb. Saddle keyc. Tangent keyd. Woodruff key17. A female mating member that forms a groove in the shaft to which the key fits.

a. Key pathb. Key wayc. Key holderd. Key hole18. A square taper key fitted into a keyway of square section and driven from opposite ends of the hub is known as.a. Barth keyb. Feather keyc. Kennedy keyd. Saddle key19. A machine member employed at the interface of a pair of mating male and female circular cross – sectioned members to prevent relative angular motion between these mating.a. Key wayb. Keyc. Constant keyd. Variable key20. A feather key is one of the following types ofa. Sunkb. Taperedc. Paralleld. Tangent21. Permanent keys made integral with the shaft and fitting into key ways broached into the mating hub.a. square keyb. splinesc. woodruff keysd. kennedy keys22. A type of square key with bottom two corners beveled is calleda. Flat keyb. Feather keyc. Barth keysd. Woodruff keys23. The bearing load on feather keys should not exceeda. 600 psib. 800 psic. 1000 psid. 1200 psi24. The two keys are angularly spaceda. 45°b. 60°c. 75°d. 90°25. The three keys are angularly spaceda. 60°b. 90°c. 120°d. 180°26. The permissible crushing is about times the permission shear stress.a. 1.5b. 1.7c. 1.9d. 1.1027. Practical considerations required that the hub length should be at least .a. 1.2db. 1.5dc. 1.7dd. 1.9d28. For three keys, a percent overload often is used.a. 10b. 15c. 20d. 2529. A pin that is cylindrical in shape with a head on one end and a radial through hole in the other end.a. Clavis pinsb. Taper pinsc. Dowel pins

d. Taper pins30. Used for the attachment of levers, wheels and similar devices onto shafts for light-duty service.a. Clevis pinsb. Cotter pinsc. Dowel pinsd. Taper pins31. The key fits into mating grooves in the shaft and mating member is called:a. Key wayb. Key pathc. Key holed. None of these32. Used as couplings, or in addition to overload, where there is danger of injury to machines or to materials in process.a. Flange couplingsb. Involute couplingsc. King pinsd. Shear pins33. A coupling that transmits power via the frictional forces induced by pulling the flanges toward each other over slotted tapered sleeves is known asa. Flange couplingb. Flange compression couplingc. Ribbed compression couplingd. Rigid coupling34. What is used for absorbing some shock and vibrations that may be appear on one shaft and of preventing the occurrence of reversed stresses caused by the shaft deflecting at the coupling.a. Flange couplingb. Flexible couplingc. Rigid couplingd. None of these35. For a single Hooke’s coupling the shaft angle should not be greater than.a. 10°b. 12°c. 15°d. 30°36. A universal coupling isa. A rigid couplingb. A type of flange couplingc. Used for collinear shaftsd. Used for non-collinear shafts37. A flange coupling is

a. Flexibleb. Used for collinear shaftsc. Used for non-collinear shaftsd. Used only on small shafts rotating at low speed38. In flange coupling the weakest element should be thea. Boltsb. Flangec. Keyd. Shaft39. In flange coupling the flange bolts are designed fora. Fatigueb. Shear forcesc. Compressiond. Tensile forces40. Which of the following mechanical devices is used for uniting or connecting parts of a mechanical system?a. Couplingb. Keysc. Splinesd. Flexible couplings41. A coupling that employs a fluid to provide angular flexibility between the input and output shafts.a. Rigid couplingb. Flexible couplingc. Hydraulic couplingd. Oldham coupling42. Which of the following type of coupling is used with collinear shafts?a. Collar couplingb. Rigid couplingc. Flexible couplingd. Hydraulic coupling43. Which of the following used to connect shafts that have lateral misalignment?a. Compression couplingb. Collar couplingc. Chain couplingd. Oldham coupling44. A coupling that is composed of two slotted members, which are connected by a continuous steel spring, and lies in the slots.a. Ajax couplingb. Flak couplingc. Lord couplingd. Slip coupling

45. Shaft couplings are used in machinery for several purposes. The most common purpose of shaft coupling isa. To provide for the connection of shaft of units that are manufactured separatelyb. To provide for misalignment of the shaftsc. To reduce the transmission of shock loads from one shaft to anotherd. All of the above46. Typical hub length falls between where D is the shaft diameter.a. 1.2D and 1.8Db. 1.25D and 2.4Dc. 1.30D and 2.5Dd. 1.35D and 3.0D47. The diameter of the large end of the pin should be

the shaft diametera. ¼b. 1/3c. ½d. 3/248. The most common type of sliding action fastener and is widely used on doors is thea. Pawl fastenerb. Magnetic fastenerc. Sliding latchd. Screw fastener49. When the key is not fitted on all four sides experience has shown that, the permissible crushing tress is about

times the permissible shear stress.a. 1.3b. 1.5c. 1.7d. 1.950. The mechanical fasteni9ng that connects shafts together for power transmission.a. Couplingb. Keyc. Splinesd. None of the above

Test 7

1. Top surface joining two sides of thread in screw is known asa. Pitchb. Top flankc. Top landd. Crest

2. Screw thread projecting from a cylindrical surface is aa. Thread seriesb. Thread shearc. Straight threadd. Taper thread

3. The conical surface at the starting end of the thread is calleda. Pitch coneb. Chamferc. Crestd. Flute

4. The surface connecting the crest and roots of the screw thread.a. Lead angleb. Length of engagementc. Top landd. Flank

5. The theoretical profile of the thread for a length of one pitch in the axial plane on which design forms of both the external threads are based.a. Basic form of threadb. Effective threadc. Basic profile of threadd. Design form of external thread

6. The top and bottom-land for gears is similar formed as to crest and for screw thread.a. Flankb. Rootc. Flank toothd. Top land

7. Some experiments made at Cornell University showed that experience mechanic could bread a bolt due to nut tightening.a. 3/8 inchb. 5/8 inchc. ½ inchd. 7/16 inch

8. The angle included between the sides of the thread measured in an axial plane in a screw threada. Angle of threadb. Angle between thread or 40 degc. Helix angle threadd. Half angle thread

9. Length of contact between two mating parts in a screw and nut threads measured axially is calleda. Arc of contactb. Depth of engagementc. Length of engagementd. Axis of contact

10. Major and minor diameters are commonly used ina. Screw threadb. Boltc. Geard. All of these

11. Nominal diameter of bolts is thea. Major diameterb. Minor diameterc. Shear diameterd. Mean diameter

12. A is a kind of thread in which the width of the thread and the space between threads are approximately equal

a. Square threadb. Acme threadc. Buttress threadd. Whit worth thread

13. A kind of thread that is generally useda. UNECb. UNCc. UNFd. UNEF

14. A type of bolt commonly used in the construction that is threaded in both ends.a. Stud boltb. Acme threaded boltc. Square threaded boltd. Hex bolt

15. A hand tool used to measure tension in boltsa. Shaverb. Tachometerc. Tensord. Torque wrench

16. One of the following is not a tap used for cutting threads in holesa. Tapping tapb. Plug tapc. Taper tapd. Bottoming tap

17. Type of bolt intended for used in bolting wooden parts together or wood to metal. It has a short portion of shank underneath around head, which is designed to keep the bolt from turning in the wood when the nut is tightened.a. U-boltb. Carriage boltc. Eye boltd. Stud bolt

18. A cylindrical bar of steel with threads formed around it and grooves or flutes running lengthwise in it, intersecting with the threads to form cutting edges. It is used to cut internal threads.a. Grooveb. Lapc. Tapd. Flute

19. A kind of bolt, which has no head nut instead, has threads on bolt ends.a. Stud boltb. Acme threaded boltc. Square boltd. Hex bolt

20. Refers to the diameter of the imaginary cylinder that bounds the crest of an external thread.a. Mean diameterb. Stress diameterc. Minor diameterd. Major diameter

21. The distance in inches a screw thread advances axially in one turn.a. Leadb. Circularc. Pitchd. Mean pitch

22. Which of the following type of threads recommended for general use?a. UNCb. UNEFc. UNFd. NC

23. It is frequently used in automotive and aircraft work.a. UNCb. UNEFc. UNF

d. NC24. Which of the following type of threads are useful in

aeronautical equipment?a. UNCb. UNEFc. UNFd. NC

25. It is used on bolts for high pressure pipe flanges, cylinder head studs etc.a. UNCb. UNEFc. UNFd. 8UN

26. Refers to a screw fastening with a nut on it.a. Boltb. Fastenerc. Rivetd. None of these

27. Which one that has no nut and turns into threaded hole?a. Rivetb. Screwc. Stud boltd. U-bolt

28. Refers to an old name for an unfinished through bolt, comes with a square.a. Coupling boltb. Machine boltc. Stud boltd. Automobile bolt

29. Which type of bolt that finished all over, usually having coarse threads?a. Coupling boltb. Machine boltc. Stud boltd. Automobile bolt

30. A type of bolt distinguishes by a short portion of the shank underneath the head being square or finned or ribbed.a. Carriage boltb. Coupling boltc. Machine boltd. Stud bolt

31. It is a type of bolt threaded on both ends than can be used where a through bolt is impossible.a. Carriage boltb. Coupling boltc. Machine boltd. Stud bolt

32. A cheap variety of bolt was made in small sizes.a. Stud boltb. Carriage boltc. Stove boltd. Mini bolt

33. A large wood screw is used to fasten machinery and equipment to a wooden base.a. Lag screwb. Log screwc. Wood screwd. None of these

34. The length of contact in a tapped hole should be a minimum of about for cast iron.a. Db. 1.5Dc. 1.2Dd. 2D

35. When the location of bolt is such that it would normally be shear, it is better practice to use aa. Dummy boltsb. Mid-pinsc. Crank pins

d. Dowel pins36. A locking device used to maintain pressure between the

threads of the bolt and nut.a. Gasketb. Lock nutsc. Lock washerd. Lock out

37. The crest diameter of a screw thread is the same asa. Major diameterb. Pitch diameterc. Minor diameterd. None of the above

38. Turn buckle hasa. Left hand threads on both endsb. Left hand threads on one end and right hand

threads on other endc. Right hand threads on both endsd. No threads

39. The diameter of a washer is generallya. Equal to the diameter of boltb. Slightly more than the diameter of the boltc. Slightly less than the diameter of the boltd. Of any size that suits the application

40. The stress concentration is maximum at in a standard coarse thread.a. All over the surfacesb. Flankc. Rootd. Top surface

41. Elastic nut is a locking device that has a. One small nut is tightened over main nut and main

nut tightened against smaller one loosening, creating friction jamming

b. A slot is cut partly in middle of tightening of screwc. Hard fiber or nylon cotter is recessed in the nut

and becomes threaded as the nut is screwed on the bolt causing a tight grip

d. Through slots are made at top and cotter pin is passed through these and a hole in the bolt and cotter pin splitted and bent in reverse direction at other end

42. Foundation bolts of specified size should be used and surrounded by a pipe sleeve with an inside diameter of a least times the diameter of the anchor bolt.a. 1b. 2c. 3d. 4

43. Foundation bolts should be at least times the diameter of the anchor bolta. 12b. 14c. 16d. 18

44. No foundation bolt shall be less than mm diameter.a. 10b. 12c. 14d. 16

45. Anchor bolts should be embedded in concrete at least times the bolt diameter.a. 10b. 20c. 30d. 40

46. The screw thread commonly used for transmission of motion is one of the following types of threads.a. Acmeb. Veec. Knuckle

d. British association47. The spindle bench vises sre usually provided with

a. Buttress threadsb. Square threadsc. Acme threadsd. V-threads

48. Any devices used to connect or joint more components.a. Boltb. Screwc. Fastenerd. None of the above

49. When the threads are opposite hand, the driven screw moves rapidly is known asa. Bearing screwb. Compound screwc. Differential screwd. Set screw

50. The threaded length is about times the diameters.a. 1.25b. 1.5c. 1.8d. 2.0

Test 8

1. Extra flexible hoisting rope application isa. 6 x 27b. 6 x 37c. 6 x 9d. 6 x 21

2. All items and abbreviations deal with wire rope arrangement except this which deals with wire rope materials strength.a. Performedb. IWRCc. Mpsd. Lang lay

3. One of the following materials is not mentioned for wire rope pulley / sheave applications.a. Plasticb. Ironc. Paperd. Copper alloy

4. The factor of safety generally applied in wire rope design starts at 3-4 for standing rope application, 5-12 for operating rope and for hazard to life and properly application like foundry operation.a. Higher valueb. 7 – 10c. 8 – 10d. 10 – 18

5. In the selection of wire rope, regular lay means wires and standards are arranged in the following manner .a. Twisted in same directionb. Twisted in any directionc. Twisted in opposite directiond. Twisted in along direction

6. A process of prestressing or ever stressing a hollow cylindrical member beyond an elastic range by hydraulic pressure.a. Presstageb. Stress relievingc. Auto frottaged. Countersinking

7. When two touching surfaces have a high contact pressure and when these surfaces have minute relative motion a phenomenon calleda. Carvingb. Frictionc. Frettingd. Prestressing

8. Pipes subjected to high pressures are generally made bya. Slush castingb. Pressure castingc. Extrusiond. Centrifugal casting

9. Hoop stress refers toa. Circumferential tensile stress

b. Compressive stressc. Radial stress

10. Autfrettage is the method of a. Calculating stress in thick cylindersb. Increasing life of thick cylindersc. Prestressing thick cylindersd. Relieving thick cylinders

11. The radial pressure and hoop tension for a thick cylinder isa. Maximum at inner surface and decreases

toward outer surfaceb. Minimum at inner surface and increases

towards outer surfacec. Minimum at inner and outer surfaces and

maximum in the middled. Maximum at inner and outer surfaces and

minimum in the middle12. Assuming longitudinal strain to be constant at any

point in thethickness of the cylinder, the radial stress Sr and hoop are related asa. Sr - Sh = constantb. Sr + Sh = constantc. Sr/Sh = constantd. Sr – Sh/Sr = constant

13. Thin cylindrical shell of diameter d and thickness t when subjected to internal pressure P, if Poisson ratio of material is µ, the circumferential or hoop strain isa. Pd(1-2µ)/2tEb. Pd(1-2µ)/4tEc. Pd(1/2 - µ)/2tEd. Pd(1/2 - µ)/4tE

14. A cylinder in which the ratio of the wall thickness to the inside diameter is may be called a thin cylinder.a. Less than 0.05b. Less than 0.07c. More than 0.05d. More than 0.07

15. External pressure tubes in boilers are designed with an apparent factor of safety ofa. 1 to 3b. 4 to 6c. 5 to 7d. 8 to 10

16. Refers to a hollow product of round or any other cross section having a continuous periphery.a. Gearb. Flywheelc. Sphered. Tube

17. The thickness should be multiplied by to obtain the nominal wall thicknessa. 5/8b. 8/5c. 7/8d. 8/7

18. It is used in high pressure cylinders.

a. Thin walled cylindersb. Thick walled cylindersc. Solid walled cylindersd. Hard walled cylinders

19. To obtained safe working pressure the critical pressure, should be at least times the working pressure.a. 3b. 4c. 5d. 6

20. The radial pressure between the cylinders at the surface of contact depends on the of the materials.a. Strengthb. Hardnessc. Modulus of elasticityd. Modulus of rigidity

21. In cross or regular lay ropes thea. Direction of twist in strands is opposite to

the direction of twist of strandsb. Direction of twist of wires and strands are

the samec. Wires in two adjacent strands are twisted in

opposite directiond. Wires are not twisted

22. Which of the ropes will be most flexible?a. 6 by 7b. 6 by 19c. 6 by 37d. 8 by 19

23. A wire rope that the wires and strands are twisted in opposite direction.a. Long layb. Lang layc. Regular layd. Performed

24. A wire rope that the wires and strands are twisted in same directiona. Long layb. Lang layc. Performedd. Non-performed

25. A type of rope used for haulages, rigging, and guardrails.a. 6 x 35 IWRCb. 6 x 25 IWRCc. 7 x 7 IWRCd.

26. A rope used for general purposesa. 6 x 15 IWRCb. 6 x 21 IWRCc. 6 x 19 IWRCd. 7 x 28 IWRC

27. A type of rope used for lines, hawsers, overheated cranes, hoists.a. 6 x 34 IWRCb. 6 x 35 IWRC

c. 6 x 37 IWRCd. 6 x 45 IWRC

28. The regular material for wire rope are made ofa. Cast steelb. Chromiumc. Wrought irond. High-carbon steel

29. The ultimate strength of improve Plow Steel is in the range ofa. 200 and 400 ksib. 240 and 280 ksic. 230 and 260 ksid. 400 and 500 ksi

30. The minimum suggested design factor of for ropes miscellaneous hoisting equipmenta. 2b. 3c. 4d. 5

31. To avoid excessive wear rate the recommended limiting pressure for 6 x 19 ropes is for cast iron.a. 200 psib. 300 psic. 400 psid. 500 psi

32. To avoid excessive wear rate the recommended limiting pressure for 6 x 19 ropes is for cast steel.a. 700 psib. 900 psic. 1000 psi d. 1200 psi

33. To avoid excessive wear rate the recommended limiting pressure for 6 x 19 rope is for manganese steel.a. 2000 psib. 2300 psic. 2500 psid. 3000 psi

34. Wire ropes are made from col-drawn wires that are first wrapped intoa. Layerb. Segmentc. Strandsd. None of these

35. The designation 6 by 7 indicates that the rope is made of 6 strands each containing a. 7 piecesb. 7 diametersc. 7 wiresd. 7 strands

36. Ropes are made ofa. Aluminum alloysb. Copperc. Bronzed. All of the above

37. The ratio of the strength of all the inside wires to the strength of all the wires in the rope isa. Excess strengthb. Reserve strengthc. Factor of safetyd. Ratio of factor

38. The chief usage of wire ropes at the present time isa. Elevatorsb. Cranesc. Tramwaysd. All of the above

39. Tests and theoretical investigations by J. F. Howe indicate that for steel ropes are the ordinary constructions the value of modulus of elasticity isa. 10,000,000 psib. 10,500,000 psic. 11,000,000 psid. 11,500,000 psi

40. Average mine hoists practice is to use drums times the rope diametersa. 60 to 70b. 60 to 80c. 60 to 90d. 60 to 100

41. What is the recommended sheave diameter for haulage rope?a. 70db. 71dc. 72dd. 73d

42. What is the recommended sheave diameter for standard hoisting rope?a. 40db. 45dc. 50dd. 55d

43. What is the recommended sheave diameter for extra-flexible hoisting rope?a. 30db. 31dc. 32dd. 33d

44. Wire ropes are made from cold-drawn wires that are first wrapped into a. Pulpb. Strandsc. Helicesd. Hemp

45. The Roebling Handbook suggest minimum design factor of guy’s isa. 3.0b. 3.5c. 4.0d. 5.0

46. The Roebling Handbook suggest minimum design factor of miscellaneous hoisting equipment is

a. 3.0b. 5.0c. 7.0d. 9.0

47. An extra flexible rope isa. 6 x 7b. 6 x 19c. 6 x 37d. 7 x 7

48. The strength of the rope is always the sum of the strength of wires.a. Less than b. More thanc. Equald. The same

49. One of the most popular wire rope isa. 6 x 7b. 6 x 19c. 6 x 37d. 7 x 7

50. The minimum factor of safety of small hoist isa. 3b. 5c. 7d. 9

TEST 9

1. To avoid brittleness of weld or the residual stress in the welding it is normally stress relieved of A. QuenchingB. NormalizingC. TemperingD. Drawing

2. A of welding whereby a wire or powder from the nozzle of a spray gun is fused by a gas flame, arc or plasma jet and then molten particles are projected in a form of a spray by means of compressed air or gas is known asA. Elector-slug building

B. Electro-beam weldingC. Plasma-arc weldingD. Metal spray welding

3. Weld metal impact specimen shall be taken across the weld with one face substantially parallel to and withinA. 3/4inB. 1/32 in.C. ¼ in.D. 1/16 in.

4. A joint between to overlapping members in whom the overlapped edge of one member is welded with a fillet weld is calledA. A single welded lap jointB. Double welded lap jointC. Track weld

5. A weld place in groove between two butting members is calledA. Full-fillet weldB. Tack weldC. butt weldD. fillet weld

6. A weld of approximately triangular cross-section that join two surfaces at approximately right angles as in lap joint, tee joint, corner joint.A. Single welded lap jointB. Fillet weldC. Tack weldD. Butt weld

7. A fillet weld whose size is equal to the thickness of the inner joint member is calledA. Butt jointB. Butt weldC. Tack weldD. Full-fillet weld

8. A weld made to hold the parts of a weldment in proper alignment until the final welds are made ofA. Butt weldB. Tack weldC. Fillet weldD. Full fillet weld

9. Test is designed primarily for application to electric-welded tubing for detection of lack of penetration or overlaps resulting from flash removal in the weldA. Butt weldB. PasteC. Lap weldD. Double butt weld

10. The internal stresses existing in a welded connection areA. Relieved by x-ray analysisB. Maybe relieved when weld is pennedC. Not relieved when the weld is pennedD. Not relieved by heat treatment

11. A welding operation in which a non-ferrous fillet metal at a temperature below that of the metal joined but is heated above 450CA. Spot weldingB. Gas weldingC. BrazingD. Arc welding

12. Uniting two pieces of metal by means of a different metal which is applied between the two in molten stateA. CastingB. WeldingC. SolderingD. Brazing

13. Joining metal by means of high current at low voltage. During the passage of current, pressure by the electrodes produces a forge weld:A. Spot weldingB. Resistance welding

C. Steam weldingD. Gas welding

14. A fusion process in which the metal is heated together into a solid joint.A. Electric arc weldingB. Gas weldingC. Spot weldingD. Projection welding

15. As one example, the ASME code for riveted joints permits the design surface compressive stress to be about ________ higher than the design tensile stress.A. 40%B. 50%C. 60%D. 70%

16. In a pressure vessel, the ratio of minimum strength of joint to the strength of solid joint is known asA. EfficiencyB. Joint efficiencyC. Performance factorD. Relative strength

17. In a pressure vessel, the usual factor of safety may be taken asA. 2B. 3C. 5D. 5

18. Are resistance welds, usually round in the same form as the electrodes that press the sheets togetherA. Edge jointB. MIG jointC. Spot jointD. TIG joint

19. Consists of short lengths (2 to 3 inches long) of welds with space between as 6 inches on centers.A. Intermittent weldB. MIG weldC. Spot weldsD. TIG welds

20. An intermittent weld, lightly done to hold the members in position for assembly purposes or for principal weldingA. Edge weldB. Tack weldC. Back weldsD. Half welds

21. A welding operation that uses hot flame and metal rod is known asA. Gas weldingB. Arc weldingC. Resistance weldingD. Automatic welding

22. The arc is covered with a welding composition and bare electrode wire is fed automaticallyA. Resistance welding

B. Submerged arc weldingC. Induction weldingD. Spot welding

23. Treating the weld as a line, the amount or inertia about center of gravity of a circular weld or diameter d would b

A. π d2/36

B. πd2/6

C. π d3/36

D. πd3/4

24. For butt welding of two plates each of which is 25 mm thick, the best process would beA. TIG weldingB. MIG weldingC. Gas weldingD. Electro slag welding

25. What should be the maximum size of the fillet weld?A. 2 mmB. 3 mmC. 5 mmD. 7 mm

26. The maximum size of the fillet weld that can be made in single pass is A. 3 mmB. 6 mmC. 8 mmD. 12 mm

27. Which diamond riveted joint can be adopted?A. Butt jointB. Lap jointC. Double riveted lap jointD. All types of joints

28. Wiping is the process ofA. Applying flux during welding processB. Clearing the welded surface after the

welding operation is overC. Connecting load pipes by soldering alloyD. Low temperature welding

29. A collimated light beam is used for producing heat inA. Laser weldingB. MIG weldingC. Plasma weldingD. TIG welding

30. During MIG welding the metal is transferred in the form ofA. A fine spray of metalB. Continuous flow of molten metalC. Electron beamD. Solution

31. If “t” is the thickness of sheet to be spot welded then electrode tip diameter is equal to

A. √ t

B. 1.5√ tC. 2.5√ tD. 2√ t

32. Weld spatter refers toA. FluxB. Filler materialC. Welding defectD. Welding electrode

33. Which of the following metals can be suitably welded by TIG welding?A. AluminumB. MagnesiumC. A and B aboveD. Stainless steel

34. Arc blow takes place inA. Arc welding when straight polarity is usedB. Arc welding when reverse polarity is usedC. Gas weldingD. Welding stainless steel

35. Unlike matrials or materials of different thickness can be butt welded byA. Adjusting initial gapB. Adjusting time duration of currentC. Control of pressure and currentD. All of the above

36. The phenomenon of weld decay takes place in A. BrassB. BronzeC. Cast ironD. Stainless steel

37. Laser welding is widely used inA. electronic industryB. Heavy industryC. Process industryD. Structural work

38. Up to what thickness of plate, edger preparation for welding is not needed?A. 2 mmB. 4 mmC. 8 mmD. 12 mm

39. Grey cast iron is best welded byA. ArcB. MIGC. Oxy- acetyleneD. TIG

40. In resistance welding, the pressure is releaseA. Just at the time of passing the currentB. Aftr completion of currentsC. After the weld coolsD. During heating

41. Half corner weld is usedA. Where severe loading is encountered and

the upper surfaces of both pieces must be in the same plane

B. Where efficiency of joint shold be 50%C. Where longitudinal shear is presentD. None of the above

42. Projection welding isA. Continuous spot welding processB. Multi spot welding processC. Used to form frameworksD. All of the above

43. Reducing flame is obtained in oxy- acetylene welding withA. Excess oxygenB. Excess of acetyleneC. Equal parts of both gasesD. Reduced acetylene

44. Brasses and bronzes are welded usingA. Carburizing flameB. Neutral flameC. Oxidizing flameD. Reducing flame

45. One of the following function is not performed by coating on the welding electrodes is to A. Increase the cooling rateB. Provide protective atmosphereC. Refuse oxidationD. Stabilize the arc

46. Welding defect called arc blow occurs inA. Arc welding using ac currentB. Arc welding using dc currentC. Gas weldingD. MIG welding

47. The purpose of using flux in soldering is toA. Increase fluidity of solder materialB. Full up gaps in bad jointC. Prevent oxide formationD. Lower the melting temperature of the solder

48. The parts are lapped and held in place under pressureA. Butt weldingB. Spot weldingC. Steam weldingD. Projection welding

49. The parts are brought together lightly with current flowing and then separated slightlyA. Mash weldB. Steam weldingC. Flush weldingD. Percussion welding

50. Which of the following produced a series of spot welds made by circular or wheel type electrodes?A. Steam welding B. Mash weldingC. Spot weldingD. Steam welding

TEST 101. The soldering material commonly applied for

automobile radiator cores and roofing seams.A. 15/85 % tin and lead

B. 50/50% tin and leadC. 45/55% tin and leadD. 20/80% tin and lead

2. The flux that should be provided in soldering electrical connection or commutator wires as its tends to corrode the connectors calledA. Sal ammoniacB. Zinc chlorideC. StearinD. Acid fluxes

3. A brazed joint is ___ soldered joint.A. Stronger thanB. The same strength asC. Three times as strong asD. Weaker than

4. Brazing requiresA. Hard solderB. Soft solderC. More heatD. Choices A and C

5. What is the reason why lead is used in solders?A. It has a high melting point.B. It has a low melting point. C. It is cheapD. Choices B and C

6. The higher the melting pint of the solder, theA. Harder the solder jointB. Softer the solder jointC. Stronger the solder jointD. Weaker the solder joint

7. Special solders used for aluminum usually requireA. less heatB. More heatC. The same heat as copper wireD. The same heat as sheet metal

8. The flux usually used for hard solder isA. AlumB. BariumC. BoraxD. Rosin

9. Soft solder melts at approximately

A. 250℉B. 350℉

C. 450

D. 550℉10. Soft solder is made of

A. Copper and zincB. Tin and copperC. Tin and leadD. Tin and zinc

11. Prepared soldered paste flux is most popular but if you did not have any, you could use _____ as substituteA. Hydrochloric acid

B. Nitric acidC. Sulfuric acidD. Any of the above

12. Hard solder is made ofA. Copper and zincB. Tin and copperC. Tin and leadD. Tin and zinc

13. Soldered will not unite with a metal surface that hasA. Dirt on itB. Grease on itC. Oxidation on itD. Any of the above

14. If muriatic acid is used as a flux, the soldered area must be cleaned thoroughly afterwards to preventA. Anyone touching it from getting burnedB. Remaining acid form eating the metalC. The acid form evaporating and the solder

disintegratingD. None of the above

15. Sweating is the process ofA. Soldering two different kinds of metalB. Separating two pieces of metal that have

been soldered togetherC. Tinning two surfaces, applying flux them,

holding the two together and heatingD. None of the above

16. A surface to be soldered should be prepared byA. Acid cleaning the surfacesB. Filing the surfacesC. Scraping the surfacesD. Any of the above

17. One fo the most important factors that is often overlooked when soldering is the fact thatA. The surfaces to be soldered must be cleanB. The two metals to be soldered must not be

the sameC. The two metals to be soldered must be the

sameD. All surfaces should be dipped in acid first

18. When soldering, flux is used forA. Keeping the metal from getting too otB. Keeping the solder from running off the

metalC. Keeping the tip of the soldering iron and

cleanD. Remove and prevent oxidation of the metals

19. Soldering is the process ofA. Holding two metals together by heatingB. Joining two metals by a third soft metal that

is applied in a molten stateC. Holding two different kinds of metals

together by heatingD. All of the above

20. Brazing is used for joiningA. Tow ferrous materialB. One ferrous and non-ferrous material

C. Two non-ferrous metalD. Two non-metals

21. What is the most commonly used flux for brazing?A. Zinc chlorideB. Zinc and tinC. Zinc and copperD. Zinc and lead

22. Multi spot welding process is also reffered as _____weldingA. TackB. FilletC. TIGD. Projection

23. The maximum temperature developed for oxy-hydrogen welding is

A. 1755℃B. 1965℃C. 2565℃D. 3440℃

24. The maximum temperature developed for oxy-acetylene welding is

A. 1965℃B. 2565℃C. 3440℃D. 4565℃

25. A mixture of aluminum powder and a metal oxide powder is ignited by a special powder in a crucible.A. Thermit weldingB. Stud weldingC. Resistance weldingD. Gas welding

26. A welding where an arc is struck between two tungsten electrodes into which a jet of hydrogen is directedA. Atomic hydrogen weldingB. Electron beam weldingC. Electro slug weldingD. Flash welding

27. A common rule is to make the rivet hole diameter from ________ for rivets in single or double shear.A. 1.2 t to 1.4 t

B. 1.2√t to 1.4√ tC. 1.3√ t to 1.6√ tD. 1.4√ t to 1.8√ t

28. Fusion welding is the name frequently given to processes not requiring pressure. It is sometimes calledA. Flash welding

B. Seam weldingC. Spot weldingD. Thermit welding

29. The ratio of the load that will produce the allowable stress in any part of the joint to the load that will produce the allowable tension stress in the unpunched plate.A. Efficiency of the weldedB. Efficiency of the jontC. Performance factor D. Load factor

30. Thicker plates usually require excessive rivet sizes and for practical reasons the rivet diameter is made approxiamatelyA. 1.2t

B. 1.2√ tC. 2t

D. 2√ t31. The process of joining metals by means by

heating to a temperature above the recrystallization temperature or to fusion with or without the application or pressureA. BrazingB. SolderingC. WeldingD. Seaming

32. The process of bonding two or more pieces of metal together by means of another metal whose melting point is below 800 F⁰A. BrazingB. SeamingC. SolderingD. Welding

33. The process of joining metal parts by means of a non ferrous fitter or alloy that melts at a temperature above 800 F.⁰A. BrazingB. SeamingC. SolderingD. Welding

34. The process of joining metals in which the two parts are joined by heating them electrically to a temperature above the recrystallization temperature.A. Flash weldingB. Projection weldingC. Thermit weldingD. Resistance welding

35. A fusion welding process in which the welding heat is obtained from an electric arc set up either between the base metal and one electrode or between to electrodes.A. Arc weldingB. Gas weldingC. Fusion welding

D. Spot welding36. Refers to the capacity of a metal to be joined by

welding in a satisfactory manner.A. Flame platingB. Metal sprayingC. MetalizingD. Weldability

37. A surfacing method of blasting particles of tungsten carbide onto the surface of a piece of metal.A. Flame platingB. Metal sprayingC. MetalizingD. Powder pouring

38. For fusion welding, efficiency shall be taken as equal toA. 80%B. 60%C. 90%D. 95%

39. When the tensile strength of steel shell plates is not known it shall be taken asA. 379. 31 N/mm2

B. 565.71 N/mm2

C. 556.17 N/mm2

D. 671.55 N/mm2

40. Minimum thickness for boiler plate shall beA. 3.56 mmB. 5.36 mmC. 6. 26 mmD. 6. 56 mm

41. The strength of iron rivets in single shear inA. 262 N/mm2

B. 303 N/mm2

C. 524 N/mm2

D. 607 N/mm2

42. The strength of steel rivets in single shear isA. 262 N/mm2

B. 303 N/mm2

C. 524 N/mm2

D. 607 N/mm2

43. When the longitudinal seams are of lap riveted construction the minimum factor of safety isA. 5B. 6C. 7D. 8

44. The maximum allowable working pressure of a non-code steel or wrought iron heating boiler of welded construction shall not exceed.A. 0.5 barB. 1.0 barC. 1.5 barD. 2.0 bar

45. The ASME Boiler Code requires that the edge distance must be not less thana. 1.5db. 2.0d

c. 2.5dd. 3.0d

46. A method of resistance welding in which the heating and the pressure are localized at specified points by providing embossed or coined projections on the pieces to be joined.A. Projection weldingB. Flash weldingC. Seam weldingD. Resistance welding

47. An intermittent weld, lightly done to hold the members in position for assembly purposes or for the principal welding.A. Spot weldB. Tack weldC. Butt weldD. Fillet weld

48. What type of welding that the hot flame and a metal rod are used?A. Seam weldingB. Gas weldingC. Spot weldingD. Resistance welding

49. It used for joining members of approximately equal in cross-sectionA. Mash weldingB. Butt weldingC. Upset weldingD. Choices B and C

50. The melting point of the filler material in brazing is approximately or above.A. 420 F⁰B. 600 F⁰C. 800 F⁰D. 1000 F⁰

Test 111. The rule of thumb in journal bearing design, the

clearance ratio/clearance should beA. 0.01001B. 0.0101C. 0.0110D. 0.0010

2. Also called eccentrically loaded bearingA. Full bearingB. Offset bearingC. Partial bearingD. Fitted bearing

3. Wahta type of bearing which totally encloses the shaft?A. Offset bearingB. Central bearingC. Babbitt bearingD. Full bearing

4. All are functions of lubricating oil exceptA. AdhesionB. Corrosion preventionC. Act as coolant

D. To tighten the load5. It is considered semi-solid lubricant

A. Lube oilB. GraphiteC. GreaseD. All of these

6. Metal that assists lubrication or lubricant in itselfA. ZincB. AntimonyC. BabbitD. Lead

7. Which of the following materials is unsuitable as a bearing?A. TeflonB. Low carbon steelC. Cast ironD. Nylon

8. Aerostatic bearing is one in whichA. The lube oil is supplied under pressureB. Lube oil is not pressurizedC. There is no lube oilD. Bearing is lightly loaded

9. At the same thermal and minimum film, thickness limitation as sleeveA. Ball bearingB. Roller bearingC. Thrust bearingD. Full bearing

10. The desired between two surfaces having relatively sliding motion is knownA. Lube oilB. GraphiteC. PackingD. Lubrication

11. What bearing composed of two principal parts, namely theA. Bearing and journalB. Clearance and fittedC. Bolt and BabbittD. Bolt and cylinder

12. When the line of action of the load bisects the arc of partial bearing it is said to be:A. Eccentrically loadedB. Fit loadedC. Centrally loadedD. Surface loaded

13. It is the difference in the radii of the bearing and the journalA. Even clearanceB. Clearance ratioC. Fit clearanceD. Radii clearance

14. It is one in which the radii of the journal and the bearing are the sameA. Clearance bearingB. Fitted bearingC. Full bearingD. Partial bearing

15. The line that passes through centers of the bearing and the journal is called the A. Line of actionB. Line of centersC. Line of tangentD. Under cut

16. Length-diameter ration was a good compromise for the general case of hydrodynamic bearings. It is approximately equal toA. 1B. 2C. 3D. 4

17. Operating temperature of oil film ranges _____________ or lessA. 120 F to 190 FB. 130 F to 160 FC. 140 F to 150 FD. 140 F to 160 F

18. At higher temperature, the oil oxidizes more rapidly aboveA. 120FB. 140FC. 160FD. 200F

19. A conclusion repeatedly verified by experiments is _____ that the smoother the surface.A. ConstantB. The greater the load capacity of the bearingC. None of theseD. Variable

20. Which of the following is considered an advantage for bearing materials?A. ConformabilityB. EmbeddabilityC. CompatibilityD. All of these

21. For thrust bearing the speed at moderate operating conditions is A. 50<Vm>200 fpmB. 50<Vm>220 fpmC. 50<Vm>250 fpmD. 50<Vm> 290 fpm

22. The 200 series bearing is calledA. HeavyB. LightC. MediumD. None of these

23. The 300 series bearing is calledA. Heavy B. LightC. MediumD. None of these

24. A type of roller bearing in which the balls are assembled by the eccentric displacement of the inner ring.A. Shallow-groove ball bearingB. Self-aligning ball bearing

C. Filling-slot ball bearingD. Deep-groove ball bearing

25. Which of the following is not a type of ball bearing?A. Shallow-groove ball bearingB. Self-aligning ball bearingC. Fillet-slot ball bearingD. Deep-groove ball bearing

26. Steel ball for ball bearing are manufactured byA. CastingB. Cold headlingC. RollingD. Turning

27. In hydrodynamic bearingsA. The oil film pressure is generated only by

the rotation of the journalB. The oil film is maintained by supplying oil

under pressureC. Do not need external supply of lubricantD. Grease is used for lubrication

28. If P = bearing pressure on projected bearing area, Z= absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given byA. ZN/PB. Z/ PNC. ZP/ ND. P/ZN

29. The rated life of a bearing changesA. Directly as loadB. Inversely as fourth power of loadC. Inversely as cube of loadD. Inversely as square of load

30. In oiless bearingA. The oil film pressure is produced only by the

rotation of the journalB. The oil film I maintained by supplying oil

under pressureC. Do not need external supply of lubricantD. Grease is needed to be applied after some

intervals31. A shaft rotating in anticlockwise direction at slow

speed inside a bearing will beA. At bottom most of bearingB. Towards left side of bearing and making

metal to metal contactC. Towards left side of bearing and making no

metal to metal contactD. Towards right side of bearing and making

no metal to metal contact32. A machine part that supports another part, which

rotates, slides or oscillateds in or on itA. JournalB. BearingC. RollerD. Casing

33. The part of a shaft or crank which is supported by and turns in bearing.

A. CasingB. BushingC. RollerD. Journal

34. It is also called anti-friction bearing.A. Rolling bearingB. Thrust bearingC. Tapered bearingD. Single row bearing

35. Which of the following is a bearing material?A. BabbittB. BronzeC. PlasticsD. All of the above

36. It acts toward the center of the bearing along a radius.A. Thrust loadB. Tangential loadC. Radial loadD. Peripheral load

37. Conrad bearing is also known asA. Needle bearingB. Ball bearingC. Roller bearingD. Tapered bearing

38. The combined effect of many of the variables involved in the operation of a bearing under hydrodynamic lubrication can be characterized by the dimensionless number called:A. Reynolds NumberB. Prandtl NumberC. Grashof NumberD. Sommerfeld Number

39. It exits primarily to guide the motion of a machine member without specific regard to the direction of load application.A. radial bearingB. Journal bearingC. Thrust bearingD. Guide bearing

40. It carries a load collinear to the axis of possible rotation of the supported member.A. Guide bearingB. Journal bearingC. Thrust bearingD. Radial bearing

41. The 400 series bearing is called:A. LightB. MediumC. HeavyD. Extra heavy

42. The product of length and diameter of the bearing is called:A. Shearing areaB. Compressive areaC. Projected areaD. Cross-sectional area

43. If the length over diameter of the bearing is unity, it is also known asA. Long bearingB. Short bearingC. Medium bearingD. Square bearing

44. A bearing in which the length ratio Length/diameter is greater than 1.A. Short bearingsB. Long bearingsC. Square bearingsD. Medium bearings

45. The product of absolute viscosity and rotational speed divided by the unit loading.A. Section modulusB. Bearing modulusC. Shear modulusD. All of the above

46. From the line of radial loading on the bearing to the position of the minimum oil-film thickness.A. Attitude angleB. Latitude angleC. Longitude angleD. Altitude angle

47. The radial distance between the center of the bearing and the displaced center of the journal is called.A. ConcentricityB. EccentricityC. EmbeddabilityD. None of the above

48. Which of the following is an example of solid lubricant?A. Molybdenum disulfideB. GraphiteC. Tungsten disulfideD. All of the above

49. The length ratio L/D typically varies betweenA. 0.1 to 0.5B. 0.2 to 0.6C. 0.2 to 0.8D. 0.25 to 1.0

50. The operating temperature of the Babbitt is limited toA. 200°FB. 300°FC. 400°FD. 500°F

Test 121. A heavy rotating body which serves as a reservoir

for absorbing and redistributing kinetic energy.A. GearB. BrakesC. FlywheelD. Fan

2. Which of the following is not a use of spring?A. Absorbs energy

B. Measure weightC. Source of energy in clocksD. Measure the thickness

3. The ratio of mean diameter of coil to the coil diameterA. Wahl factorB. Diameter ratioC. Spring indexD. Lead angle

4. The overall length of the spring when it is compressed until all adjacent coils touched.A. Compressed lengthB. Free lengthC. Solid lengthD. None of these

5. The length of coil sprig under no load.A. Compressed lengthB. Free lengthC. Solid heightD. None of these

6. In general, steel spring are made of relatively high carbon steel usuallyA. More than 0.5%B. 5%C. Less than 0.5%D. 10%

7. When heat treated wire is coiled cold, it should be stress relieved for bending stresses after cooling by being heated at some at what temperature?A. 400FB. 500FC. 600FD. 700F

8. A low cost spring material, suitable where service is not severe and dimensional precision is not needed.A. Hard drawn wire springB. Helical springC. Stainless steelD. Helical tension spring wire

9. A hard drawn also 80% reduction but it is made of high-grade steelA. Music wireB. Oil tempered wireC. Song wireD. Chromium- silicon

10. A spring wire with good quality for impact loads at moderately high temperatureA. Hard drawn wire springB. Helical spring wireC. Chromium-siliconD. Helical tension spring wire

11. A type of coil where the helical coil is wrapped into a circle forming an annular ringA. Volute springB. Motor springC. Hair springD. Garter spring

12. A type of spring where thin flat strip wound up on itself as a plane spiral, usually anchored at the insideA. Volute springB. Motor springC. Hair springD. Garter spring

13. A type of spring made in the form of dished washerA. Volute springB. Motor springC. Hair springD. Believille spring

14. In laminated spring the strips are provided in different lengths forA. EconomyB. Reduction in weightC. Improved appearanceD. Space consideration of the utility stage

15. An elastic stored energy machine element that when released, will recover its basic formA. FlywheelB. ClutchC. BrakesD. Spring

16. When a spring is made of ductile material, the curvature factor would beA. ZeroB. ConstantC. UnityD. Positive

17. The solid length plus the clearance plus the maximum deflection.A. Free lengthB. HeightC. DistanceD. Original length

18. The majority of coils springs are made of coil tempered carbon steel wire containing______________ carbon.A. 0.30 to 0.40%B. 0.40 to 0.50%C. 0.50 to 0.60%D. 0.60 to 0.70%

19. Experimental results indicate that the actual frequency of the spring is fromA. 5 to 10%B. 10 to 15%C. 15 to 20%D. 20 to 25%

20. According to W.M. Griffirth, the critical frequency of the spring should behold at least ________ times the frequency of application of a periodic load.A. 5B. 10C. 15D. 20

21. The actual number of coil is _________ in a squared and ground ends.A. n B. n + 2C. ndD. ( n + 1) d

22. The solid length of squared ends isA. (n+3)dB. (n+1)dC. npD. n + 2

23. The free length of ground ends isA. np + 3dB. np + 2dC. np + dD. np

24. the shortest length for the spring during normal operationA. compressed lengthB. operating lengthC. solid lengthD. free length

25. the relationship between the force exerted by a spring and its deflection is calledA. spring indexB. spring rateC. wahl’s factorD. Spring angle

26. The ration of the mean diameter of the spring to the wire diameter is calledA. Spring indexB. Spring ratioC. Spring rateD. Spring constant

27. Refers to the axial distance from a point on one coil to the corresponding point on the next adjacent coil.A. LeadB. Spring distanceC. PitchD. Spring deflection

28. The spring index for general industrial uses should beA. 5 to 7B. 6 to 8C. 7 to 9D. 8 to 10

29. What is the spring index of valve and clutch?A. 3B. 5C. 7D. 9

30. Refers to the space between adjacent coils when the spring is compressed to its operating lengthA. Coil allowanceB. Coil toleranceC. Coil clearanceD. None of these

31. The most practical spring designs produce a pitch angle is less than A. 12°B. 15°C. 20°D. 25°

32. Engine valves get shut by means of A. Valve lockB. TappetC. Valve springD. Adjusting screw

33. Which of the following materials is used for leaf and coil spring?A. AISI 3140B. AISI 3150C. AISI 3240D. AISI 4063

34. The circumference of a coil spring times the effective number of coils is calledA. Active lengthB. Solid lengthC. Compressed lengthD. Operating length

35. For spring subjected to light service, the factor of safety __________ is suggestedA. 1.5B. 2.0C. 2.5D. 3.0

36. Refers to a flat or curved made of thin superimposed plates and formin a cantilever or beam of uniform strength.A. Laminated springB. Graduated springC. Full springD. Conical spring

37. Cross wire grooves are types whichA. Decrease the danger of skiddingB. Absorb shocks because of road unevennessC. Provide good factionD. Provide better load carrying capacity

38. The _____ of parallel connection of spring is always constantA. ElongationB. LoadC. Thermal conductivityD. Resistance

39. Speedometer drive is generally taken fromA. DynamoB. FlywheelC. GearD. Front wheel

40. The device for smoothing out the power impulses from the engine is known asA. ClutchB. FlywheelC. GearboxD. Differential

41. Typical hub length falls betweenA. 1.25D to 2.4DB. 1.25D to 5DC. 1.3 D to 3.4DD. D to 7D

42. The recommended coefficient of fluctuation of flywheels for punching, shearing, and pressing machine isA. 0.05 to 0.10B. 0.03 to 0.05C. 0.002 to 0.005D. 0.01 to 0.02

43. Attached to the rear end of the crankshaft is theA. Vibration damperB. FlywheelC. Drive pulleyD. Timing gear

44. Flywheel is also known asA. Steering wheelB. Front wheelC. Balance wheelD. Rear wheel

45. What energy is stored in flywheels?A. Kinetic energyB. Internal energyC. Potential energyD. Rest energy

46. What is the function of the flywheel?A. To keep the speed fluctuation within the

desired limitsB. To limit the momentary rise or fall in speed

during sudden changes of loadC. To keep the angular advance or retardation

within prescribed limit as compared with a perfectly uniform angular speed

D. All of the above47. In many flywheel designs, about how many

percent of the weight is concentrated in the hub and armsA. 20B. 30C. 35D. 45

48. A large rotary machine part whose function is to store energy and to produce uniform angular velocity of the shaft or reciprocating engine.A. CamB. IdlerC. FlywheelD. Chuck

49. A massive wheel, which by its inertia assists in securing uniform motion of machinery by resisting sudden changes of speed.A. LinkageB. CrankC. Planetary gearsD. Flywheel

50. The function of a flywheel is to

A. Complete the unusual strokeB. Operated the enginesC. Keep the engines weight lightD. None of theses