DGCA PAPER II QUESTIONS FROM : 9A CHAPTER 51. Which statement is correct?a) Al-alloy bolt smaller than mm diameter are not used in primary structureb) Al-alloy bolts and nuts are used where they will be repeatedly removed for purpose of maintenance and inspectionc) Both are correctd) None of these2. AN-73 drilled head bolt is similar to the a) Close tolerance boltb) Special boltc) Standard hex-boltd) All of these

3. Jo-bolt is a trade name of a) An internally treaded two piece rivetb) An externally treaded three piece rivet. c) An internally treaded three piece rivetd) An externally treaded two piece rivet

4. During installation of Jo-bolta) The nut is turned while the bolt is heldb) The bolt is turned while the nut is held.c) Bolt are turned at the same timed) None of these

5. The lock bolt combines the features of aa) High strength bolt and nutb) High strength bolt and rivitc) High strength bolt, rivet and nutd) None of these

6. Blind type lock bolts area) Used where only one side of the work is accessibleb) As a) & they have exceptional strengthc) As b) & sheet pull together characteristicd) As c) & where it is difficult to drive a conventional rivet7. How is a clevis bolt used with a fork-end cable terminal recurred?a) With a shear nut tightened to a snug fit with no strain imposed on the fork and safetied with a cotter pin.b) With a castle nut tightened until slight binding occurs between the fork and the fitting to which it is being attached.c) With a shear nut and cotter pin or a thin self-locking nut tightened enough to prevent rotation of the bolt in the forkd) None of these

8. Which of the bolt head code marking shown identifies a internal hex head bolt?a) b)c)

1) a2) b3) c4) none

9. Which statement is correct?a) Self-locking nuts are used on a/c to provide tight connections which will not shake loose under severe vibrationb) S.L.N are used where bolt or nut subject rotationc) Both a) & b)d) None of these

10. Elastic stop nuts are not useda) Where temperature is lower than 250oFb) Higher than 250oFc) Between 250oF to 750oFd) None of these

11. Special washers are useda) Where a bolt is installed at an angle to a surfaceb) Where perfect alignment with a surface is not requiredc) Both a) & b)d) None of these

12. The marking found on the head of the studa) Body diameter, length & shank typeb) Body diameter, length & head typec) Only lengthd) None of these

13. Airloc pasteners consists of three partsa) Stud, grommet and receptacleb) Stud & grommetc) Stud, cross pin and receptacled) None

14. 7x19 cable is made upa) Seven strands of 7 wiresb) Nineteen strands of seven wires eachc) Seven strands of nineteen wires eachd) 19 strands of 19 wires each

15. The diameter range of 7x19 cables are a) 1/8 to 3/8b) 1/16 to 3/32c) 1/8 to d) 1/8 to 1/16

16. Turnbuckle assembly is a a) Mechanical screwb) Making minor adjustment in cable length and adjusting cable tensionc) Consisting two threaded terminals and a threaded barreld) All the above

17. Push-pull tubes are generally made in short lengths toa) Prevent vibration and bending under tension loadb) Prevent vibration and bending under compression loadc) Only prevent vibrationd) None

18. Corrosion resistant steel cotter pin is used in locations wherea) Magnetic material is requiredb) Resistance to corrosion is desiredc) Bothd) None

19. Which is correct statementa) Pin rivet are used only in shear applicationb) They should never be used where the grip length is less than the shank diameterc) Bothd) None

20. Pin rivetsa) Hi-shear rivetsb) Used where access to both side of the material is requiredc) They are approximately three times as strong as solid shank rivetsd) All

21. 10 KB 105a) Flat headb) Flat head & countersunkc) Countersunk d) None

22. 10 KB 107a) Closed end and a keyb) Flat headc) As a and countersunk headd) None

23. AN 10 DH5A where H indicatea) 5/8 diameter head drilledb) 5/8 diameter head and shank drilledc) 5/8 diameter & shank drilledd) None24. O-rings can be detected bya) 4 power magnifying glassb) Small cracks, particles of foreign material or other irregularities are checked by rollingc) Slight stretching of the ring checked by doweld) All

25. Clevis bolt are used fora) Tension loadb) Tension & shear loadc) Shear loadd) None

26. Internal wrenching bolts are suitable for use in a) Shear loadb) Tension & shear loadc) Tensiond) None

27. A cross inside triangle indicatesa) Close tolerance boltb) Corrosion resistant steel boltc) Stainless steel boltd) Screw

28. A/C screw is generally manufactured witha) Class-1 fit of threadb) Class-2 fit of threadc) Class-3 fit of threadd) Class-4 fit of thread

29. Generally speaking, bolt grip length should be a) 1 time the thicker material through which they extendb) Equal to thickness of material + one diameterc) Equal to thickness of material through which they extendd) Any length

30. Stainless steel rivet heada) Raised double dashb) Raised dashc) Raised crossd) No marking on head

31. A hole is corroded which cannot be removed, is repaired bya) Scrap out the partb) Helicoilc) Acres sleeved) Use special washer

32. Tw=100; Te=?Extension=5,A=20(Torque wrench)a) 150 in lbsb) 125 in lbsc) 175 in lbsd) 200 in lbs

33. For shear jointa) Clevis pinb)Taper pinc) Roll pind) Cotter pin

34. Solid rivet of 1/8 diameter is replaced by (CAP)a) Two rivet of 1/16 diameterb) Three rivet of 1/16 diameterc) Four rivet of 1/16 diameterd) Cannot be replaced

35. Colour code for o-rings a) Red dot for hydraulic fluidb) Green dot for fuelc) Yellow dot for skydrol fluidd) d) None

36. For safetying turnbuckles, locking wire is used ina) Single wrapb) Double wrapc) Double wrap spirald) All are correct

37. Dzus fasteners consist of a stud, grommet and receptacle, stud length is measured ina) Tenth of an inchb) Sixteenth of an inchc) Hundredth of an inchd) Thousandth of an inch

38. A grub screw is aa) Headless type set screwb) Cap screw with fine threadsc) Machine screw with flat countersunk headd) Cylindrical piece threaded at both ends and is plain in the middle

39. Grip length of cherry lock rivet is measured in incrementsa) 1/8b) 3/32c) 1/16d)1/32

40. Identifying marks on the head of Al-alloy rivet indicatea) Shank sizeb) Head treatment given by manufacturerc) Specific alloy and by manufacturerd) All are correct

41. The solid shank rivet, which is used in interior of a/c, where maximum strength is needed a) round headb) brazier headc) flat headd) as in c) & is AN-442

42. The standard range for counter sunk head angle isa) 72 - 120b) 78 - 112c) 78d) 100

43. To repair or replacement of protuding head riveta) round headb) counter sunk head is neededc) universal head is usedd) any rivet can be selected

44. For riveting Mg alloy sheeta) 5056 rivet should be used.b) monel rivet should be usedc) mild steel should be usedd) All of the above

45. Which material you select for attaching Ni-steel sheeta) Monelb) 2017-Tc) 2024-T6d) Mild steel

46. Which one of the following rivet is ready for use as received & need no further heat treatment.a) 2117b) 2017-Tc) 2024d) 1100

47. Ice-Box rivets area)2017-Tb) 2117-Tc) 2024-T d) a) & c) are correct

48. The specification for universal head rivet a) AN-470b) MS-20613c) MS-20615d) all

49. The protective film of zinc chromate over rivet identified bya) its yellow colourb) pearl grayc) its white colourd) its silver gray colour

50. Part No. AN 470B 3 8 indicatesa) shank diameter is 3 b) rivet length is 8 16 32c) material is 5056 Al alloyd) all of the above

51. Mark the correct statement.a) Identification marking shall appear either on shank or head of rivet.b) The rivet length shall be taken in fraction of 32 of an inch.c) Group-A, Al-alloy can be used with Group-B Al-alloy keeping in view the dissimilar metal corrosion factor.d) Both a) & b) are correct.

52. The material code for 2024 T riveta) Db) ADc) DDd) B

53. The absence of latter following the AN-standard number indicatea) material is Al-alloyb) material is steelc) material is mild steeld) any of the above

54. The head marking Raised triangle, indicate the rivet isa) 5056b) 2219c) 7075d) Monel

55. The head marking for 2024-T isa) raised dotb) raised double dashc) raised three dashd) recessed double dash

56. The marking recessed single dash indicate the rivet isa) QQW 423 b) QQS-633c) 2117d) QQ1-281

57. The shank length used for making blind head in a pull thru rivet isa) 1b) - c) 3/64 d) 3/64 1/8

58. Its proven fatigue strength make it the only blind rivet interchangeable structurally with solid rivet isa) wire draw cheeylock rivetb) dill lock rivetc) bulb cherrylock rivetd) deutsch rivet

59. To joints requiring an excessive amount of sheet take-up, you may selecta) pin rivet b) wire draw cherrylock rivetc) bulb cherry lock rivetd) all of the above

60. Riv nut isa) hollow, blind rivetb) made of 6053-Al alloy & a)c) counter bored & thread insided) all of the above

61. In Part No. 10 KB 106, KB indicatesa) close end & keylessb) close end & keyedc) open end & keyedd) open end & keyless

62. Part No. 10 - B -107 indicatesa) Riv nut having flat headb) Pin rivet having round headc) Riv nut having counter sunk headd) Deutsch rivet

63. Pin rivet - a) not a blind typeb) have the same shear strength as bolt of equal diameter.c) as in b) & are about 40% weight of boltd) all of the above.

64. Pin rivets are useda) in compressionb) in tensionc) in sheard) all of the above & also carry bending load.

65. The Part No. NAS 177 14 17 indicatesa) flat head Jo-boltb) flat head Avdelok fastenerc) flat head pin rivetd) counter sunk head, pin rivet

66. The hardware pre-lubricated & must not be degreased before assembly is/are a) Jo-boltb) Avdelok Fastenerc) Both a) & b) are correctd) Huck mechanical lock rivet

67. The AN-3 to AN-20 (hex head a/c bolt) isa) General purpose boltb) Close tolerance boltc) Internal wrenching boltd) Special purpose bolt

68. Mark the correct statement.a) Steel bolt smaller than No.- 10-32 are not use in primary structure.b) The AN-3 & AN-73 series bolt are interchangeable for all practical purpose.c) b) is correct from the stand point of tension & shear strength.d) All are correct.

69. Bolt can be identifieda) by materialb) by method of securingc) a) & shape of headd) all of the above

70. The head marking on bolt indicate a) bolt materialb) name of manufacturerc) a), b) & whether bolt is a standard type or special purpose bolt.d) a) & b) are correct

71. The marking for corrosion resistant steel bolt is a) raised dash b) asteriskc) single raised dashd) two raised dash

72. For a bolt, part no. AN3DD5A indicatesa) bolt is drilled for saftyingb) material of bolt is 2017 Al-alloyc) diameter bolt is 5/16d) length of bolt is 5/8

73. Eye bolt is useda) where internal tension load is applied.b) head is slotted to received common screw driver.c) used for external tension load.d) both b) & c) are correct.

74. Mark the correct statement.a) where, there is not much clearance, stump type lock bolt is used.b) alloy steel lock bolt may be used to replace steel Hi-shear rivets.c) as in b) provided the diameter and head is similar.d) both a) & c) are correct.

75. Bolt part no. ALSF E 88 indicatesa) brazier head, stump type lock boltb) flat head, stump type lock boltc) counter sunk, stump type lock boltd) counter sunk, pull type lock bolt

76. The specification AN 335 indicatesa) fine thread, light hex nutb) fine thread, plain hex nutc) coarse thread, check nutd) coarse thread, plain hex nut

77. Castellated shear nut is useda) in tension application.b) in shear application only.c) as in a) & with drilled clevis bolt, taper pin etc.d) as in b) slotted for safety.

78. Stainless steel self locking nuta) having locking shoulder & key.b) used in application where temperature exceed 250 F.c) a) , b) & also called high temperature self locking nut.d) all are wrong.

79. Material used for Tinnerman instrument mounting nut isa) Al-alloyb) Steel alloyc) Brassd) Monel 80. Mark the correct statement.a) Elastic stop nut can be used many time.b) As in a) & when turn with fingers, replace it.c) Every time the parts disassembled, replace the elastic stop nut.d) As in c) & used at place where temperature exceed 250F.

81. Characteristics of steel are controlled bya) Removal of carbon from ironb) Types of alloying elements added to itc) Amount of alloying elements added to itd) All are correct82. Bearing strength of a material refers toa) Direct tensile load it can bearb) Resistance to tear at the point of applied loadc) Resistance to fracture at the point of applied loadd) Resistance to shear83. Characteristics of metals relating to drawing it into wire isa) Tensile strengthb) Malleabilityc) Ductilityd) Brittleness84. Fusibility of a metal refer to its property that permitsa) Weldingb) Drawing into thin sheetsc) Drawing into wiresd) Good thermal conductivity85. Aluminium alloy 1100 impliesa) Pure aluminiumb) It contains 11% copperc) It contains 111% zincd) Heat treated alloy86. Aluminium alloys have a four digit index system where each digit signifies something. In 2024, the first digit indicatesa) Copper is the major alloying elementb) Two alloying elements have been addedc) Total percentage of alloying elements d) None of these87. Alclad is a metal consisting ofa) Aluminium alloy core with pure Al surfaceb) Pure aluminium core with Al alloy surfacec) Alternating layers of pure Al & Al alloysd) None of these88. Which of the following aluminium alloy is heat treated and artificially aged?a) 3003-Fb) 5052-Hc) 6061-Od) 7075-T689. Clad aluminium alloys are used in aircraft. They area) Lighter than other aluminium alloysb) Stronger than unclad aluminium alloysc) Easily heat treatabled) Less susceptible to corrosion90. Aircraft structural members made from sheet metal can normally bea) Repaired, except when subjected to compressible loadsb) Repaired, except when subjected to tensile loadsc) Repaired using approved methodd) Not repaired & need replacement only91. Medium carbon steels have a carbon percentage ofa) 0.1 0.3b) 0.3 0.5 c) 0.5 1.0d) 1.0 2.092. High carbon steel is generally used fora) Shock absorbersb) Landing gear strutsc) Engine mounting boltsd) Springs & files93. What material is used in the construction of firewall of aircraft engines?a) Aluminium alloyb) Stainless steelc) Chrome-molybdenum steeld) Tungsten steel94. Which of the statement is correct?a) Both heat treatable & non heat treatable aluminium alloys can be strain hardenedb) Strain hardening is same as cold workingc) Strength & hardness increases during cold workingd) All are correct

95. Find out the wrong statement regarding titaniuma) It is highly corrosion resistantb) It maintain strength at elevated temperaturesc) It has good resistance to creepd) It is magnetic96. The balls used for ball bearings are made ofa) Cast ironb) Cast steelc) Wrought irond) Carbon chrome steel97. Files used in fitting shop are made froma) Cast ironb) High carbon steelc) Chrome steeld) Mild steel98. Property of a material to be drawn plastically before breaking is called ductility. Most ductile material isa) Copperb) Goldc) Leadd) Tin99. i) Aluminium has high electrical and thermal conductivityii) Ductility of aluminium improves with the addition of iron & silvera) Only i) is correctb) Only ii) is correctc) Both i) and ii) are correctd) Neither i) nor ii) is correct100. i) Muntz metal is same as yellow brassii) Muntz metal contains copper & zinc in the ratio of 3:2a) Only i) is correctb) Only ii) is correctc) Both i) and ii) are correctd) Neither i) nor ii) is correct

101. SAE 2340 isa) Chromium steel with 3% chromiumb) Nickel chromium steel with 0.3% carbonc) Nickel steel with 3% Nickel & 0.4% carbond) Carbon (0.4%) steel

102. Engine mounts are made up ofa) 18-8 corrosion resistance mild carbon steelb) Chrome molybdenum mild carbon steelc) Chrome molybdenum high carbon steeld) None of these

103.During nitric acid test, if the material shows strongly magnetic nature, then it isa) Monel metalb) Carbon steelc) Nickel steeld) 18-8 steel

104. Weldability is poorest in case ofa) Plain carbon steelb) Low carbon steelc) High carbon steeld) Wrought iron

105. Carbon steel isa) Refined form of cast ironb) Extremely hardc) Made by adding carbon to steeld) An alloy of iron & carbon with varying quantities of sulphur & phosphorous

106. Stainless steel is corrosion resistance due to presence ofa) Siliconb) Cobaltc) Chromiumd) Manganese

107. Manganese is added to low carbon steel toa) Make them tough & hardb) Raise their tensile strengthc) Improve machine abilityd) Increase corrosion resistance

108. Cold bending of an aluminium sheeta) Is not permittedb) Softens the material at the bendc) Strain hardens material at the bendd) Results in material failure irrespective of bend radius

109. Titanium can be identified bya) Chemical testb) Spark testc) Moistening & scratching with pencild) Both b) & c) are correct

110. L shaped channels are produced bya) Forgingb) Extrusionc) Machiningd) Casting

111. Muntz metal is used fora) Nuts & boltsb) Parts in contact with salt waterc) Fuel & oil linesd) Both a) & b) are correct

112. All carbon steels have well defined critical point & range. Low carbon steel hasa) Two critical pointsb) Three critical pointsc) Four critical pointsd) Six critical points

113. In steel, grain becomes coarser whena) It is heated to a temp just below critical pointb) It is heated above critical rangec) Depends upon carbon percentaged) It does not happen at all

114. Creep in metals isa) Elongation due to temperatureb) Temporary elongation due to temperature and stressesc) Permanent set due to stresses and high temperature operationd) All are correct

115. Magnesium alloys area) Magneticb) Light in weightc) Cheap & easy to machined) Highly prone to corrosion

116. i) Bronze is superior to brass in corrosion resistance propertyii) Duralumin can be age hardeneda) Only i) is correctb) Only ii) is correctc) Both i) and ii) are correctd) Neither i) nor ii) is correct

117. i) Clad metals are two dissimilar metals joined together under high hydraulic pressure ii) Clad metals mean forged non ferrous metalsa) Only i) is correctb) Only ii) is correctc) Both i) and ii) are correctd) Neither i) nor ii) is correct

118. Aluminium alloys 2017 & 2024 must be transformed from the heat treatment medium to quench tank within 10 seconds or so. A delay results ina) Retarded age hardening b) Reduced corrosion resistancec) Dull/Strained surfaced) Hard/brittle surface119. Grip length of the bolt isa) Total length of the boltb) Plain shank length of the boltc) Length under the head to the end of the boltd) None of these

120. In close tolerance bolt, force applied to drive in isa) 10 ounce hammerb) 20 ounce hammerc) 12 to 14 ounce hammerd) Sledge hammer

121. AN 4 - 7 bolt showsa) 7/8 diab) 1/4" lengthc) 4 lengthd) 1/4" dia

122. Bolt of class 4 fit isa) Loose fitb) Free fitc) Close fitd) Tight fit

123. Special washer AC 950 and AC 955 are used wherea) Bolt is installed at angle to surfaceb) Bolt is installed head downc) It can be used any whered) None of these

124. To prevent the crushing surface on wooden structure with nut and bolt, the washer used isa) AN 936b) AN 935c) AN 970d) AN 960

125. Where shear load is taken by the bolt, the nut used isa) Plain nutb) Castle nutc) Castellated shear nutd) Self locking nut

126. In the patch repair of the Aircraft skin, the edge distance (distance from the center of the rivet to the edge of the sheet) should be (d is diameter of rivet)a) 2d to 4db) 8dc) 6dd) 75% of the pitch

126. S in Al-alloy designation indicates: a) Cast alloyb) Wrought alloyc) As in b) and used for a/c structure d) None

127. Which Al-alloy is more corrosion resistant? a) 2 Sb) 3 Sc) 17 Sd) 52 S

128. Al clad is generally of a) 17 S & 24 Sb) 24 S & 52 Sc) 52 S & 53 Sd) 53 S & 62 S

129. A/C rivets are identified by a) Head Styleb) Alloyc) Length & Diameterd) All of these

130. Which of the following is the Non-Magnetic? a) Inconelb) K-Monelc) Moneld) All of these

131. SAE 13XX represents a) Magnesium Steel b) Manganese Steel c) Silicon Steeld) Chromium Steel

132. Hot piece of metal is increased in thickness and decreased in length a) Upsettingb) Down settingc) Swagingd) Rolling

133. Which material you select for riveting Ni-steel sheeta) Monelb) 2017-Tc) 2024-T6d) Mild steel

134. Which one of the following rivet is ready for use as received and need no further heat treatmenta) 2117b) 2017-Tc) 2024d) 1100

135. Ice-Box rivets area) 2017-Tb) 2117-Tc) 2024-Td) Both a) & c)

136. The specification for universal head riveta) AN-470b) MS-20613c) MS-20615d) All of these

137. Part No AN 470 B 3-8, indicatesa) Shank dia is 3/16b) Rivet length is 8/32c) Material is 5056-Al alloyd) All of the above

138. Packing is made of a) Asbestosb) Corkc) Synthetic or natural rubberd) Felt139. SAE 2340 isa) Chromium steel with 3% chromiumb) Nickel chromium steel with 0.3% carbonc) Nickel steel with 3% Nickel & 0.4% carbond) Carbon (0.4%) steel

140. During nitric acid test, if the material shows strongly magnetic nature, then it isa) Monel metalb) Carbon steelc) Nickel steeld) 18-8 steel

141. Weldability is poorest in case ofa) Plain carbon steelb) Low carbon steelc) High carbon steeld) Wrought iron

142. Stainless steel is corrosion resistance due to presence ofa) Siliconb) Cobaltc) Chromiumd) Manganese

143. L shaped channels are produced bya) Forgingb) Extrusionc) Machiningd) Casting

144. Creep in metals isa) Elongation due to temperatureb) Temporary elongation due to temperature and stressesc) Permanent set due to stresses and high temperature operationd) All are correct

145. Grip length of the bolt isa) Total length of the boltb) Plain shank length of the boltc) Length under the head to the end of the boltd) None of these

146. In close tolerance bolt, force applied to drive in isa) 10 ounce hammerb) 20 ounce hammerc) 12 to 14 ounce hammerd) Sledge hammer

147. Special washer AC 950 and AC 955 are used wherea) Bolt is installed at angle to surfaceb) Bolt is installed head downc) It can be used any whered) None of these

148. In magnet steel, the alloying elements are a) Nickel, Cobaltb) Silicon, Nickelc) Molybdenum, Copperd) Tungsten, Cobalt

149. MS 20004 is a a) Internal wrenching boltb) Close tolerance boltc) Clevis boltd) None of these

150. Mark the incorrect statement, regarding K monel metala) It is ferrous alloyb) It is used for gears and chainc) It is non ferrous alloyd) It is corrosion resistant

151. The symbol is fora) Woodb) Cast ironc) Steeld) Rubber

152. Corrosion resistant steel used in Aircraft construction isa) 18 8 steel b) Medium carbon steelc) 18 6 steeld) Silicon steel

153. Major alloying elements of stainless steel are ( in order of % composition)a) Ni Crb) Ni Vc) W Nid) Cr Ni

154. Forging steel isa) Low Carbon steelb) Medium Carbon steelc) High Carbon steeld) Either a) or c)

155. Exhaust collector is made up ofa) Silicon steel b) Titanium steelc) Chromium steeld) Ni Cr steel

156. Which element is responsible for Red hardness property?a) Tib) Tac) Mod) W

157. Which elements are responsible for Penetration hardness?a) Mn, Sb) Mn, Pc) Mn, Crd) Cr, C

158. Stainless steel isa) Ni Cr steelb) Cr Mo steelc) Ni W steeld) Cr Va steel

159. Silicon in steel acts asa) Oxidiser b) Deoxidiserc) Impurityd) Both b) & c)

160. Mark the correct statementa) SAE 2330 is chromium steelb) SAE 3250 is used in making axle shafts because of high strengthc) SAE 3115 is used for making piston pins, cam rings

161. Steel is preheated before welding to a) Include strength b) Enhance its creep resistancec) Enhance its creep resistance

162. Steel used for wing-hinge fittings & flying wire trunnions isa) SAE 4140b) SAE 6150c) SAE 1015

163. Steel used commercially for automatic machine production isa) SAE 4135b) SAE 4615c) SAE 6115

164. Steel used as an alternate for SAE 4130 steel isa) SAE 8620b) SAE 8630c) SAE 9260

165. Pyrometer is used toa) Measure the temperatureb) Protect the furnacec) Give protective atmosphere

166. The fastest rate of cooling is given bya) Brineb) Oilc) Water

167. The tip of the rivet is upset to form a second head and that is known asa) Round headb) Shop headc) Flat headd) Brazier head

168. O ring packings are used for preventing a) Internal leakb) External leakc) One direction leakd) Both a) & b)

169. Gaskets are made ofa) Asbestos b) Copperc) Corkd) All of these

170. In hex bolt, the length is measureda) Under the head to the end of the boltb) Plain portion of the shankc) Total lengthd) Threaded length

171. Aircraft bolts are made ofa) Mild steelb) Stainless steelc) Aluminum alloyd) Cadmium plated nickel steel corrosion resistance steel and aluminum alloy

172. Packing is made ofa) Asbestosb) Corkc) Synthetic or natural rubberd) Felt

173. Running seals area) Packingb) Gasketc) Wiperd) None of these

174. Washer (gasket) used for spark plug isa) Asbestosb) Copperc) Corkd) All of these

175. Gasket used on uneven or varying space is made ofa) Asbestosb) Corkc) Copperd) All of these

176. Seals used for cleaning and lubricating is called a) Wiperb) Gasketc) Packingd) None of these

177. To identify Ferrous metala) hardness test is usedb) Spark test is usedc) Heat treatment is carried outd) Grinding stone is used

178. Solution heat treatment & artificially eged is indicated bya) T5b) T7c) T6d)T8

179. The most widely used alloys in aircraft construction are hardened bya) Cold workb) Hot rollingc) Heat treatmentd) All the above

180. The heat range for salt bath Furnaces area) Depending upon composition of bathb) As in a) & normally 6500 F to 17000Fc) As in a) & normally 3250F to 24500Fd) None of these

181. Al and its alloys are covered with pure aluminium to corrosion resistance is calleda) Sherardizingb) Anodizingc) Claddingd) Chromating

182. Magnesium parts are protected for temporary storage witha) Claddingb) Anodizingc) Platingd) Chrome pickle treatment

183. The multiple disk break assembly consist ofa) 3 statorsb) 4 rotatorsc) 1 bearing careerd) All above

184. In anodizing of Al alloys a thin layer of film on the surface is formed ofa) Al oxideb) Sodium oxidec) Potassium oxided) Calcium oxide

185. Dichromate treatment is given toa) Al partsb) Steel partsc) Magnesium partsd) Copper parts

186. Al Alloy bell cranks employing pressed in taper pins are suspected toa) Fatigue corrosionb) Fretting corrosionc) Stress corrosiond) None of these

187. Raised countersunk heads bolt nominal length is measured froma. Under the head to the tipb. Total length of the boltc. Threaded lengthd. Distance from upper surface of the head (excluding the raised portion) to the extreme end of shank

188. Bolt head is ofa Steelb. Corrosion resistant steelc. Al. Alloyd. Brass

189. Bolt head is ofa. Steelb. Al. Alloyc. C.R.S. close toleranced. Al. Alloy close tolerance

190. AN 935 isa. Plain washerb. Lock spring washerc. Shake proof washerd. None of above

191. AN 936 isa. Shake proof washerb. Lock spring washerc. Plain washerd. None of above

192. Grub screws are used fora. Locking the boltb. Locking the nutc. Locking two threaded componentsd. To stop end movement of piston

194. Taper pin are manufactured with taper of a. 1 in 48b. 1 in 10c. 1 in 50d. 1 in 60

195. Main constituents of Inconel area. Nickel and Ironb. Nickel and Chromiumd. Nickel and Copperd. Copper and Manganese

196. Aircraft wheels, brake pedals, control columns are made out ofa. Nickel alloyb. Magnesium alloysc. Magnesium alloy castingsd. Wrought Magnesium alloy

197. Anti-corrosive treatment given to copper and its alloys in order to reduce electric potential between these parts and its adjacent steel or aluminium parts isa. Galvanizingb. Parkerizingc. Metal sprayingd. Cadmium plating

198. In order to increase elasticity and strength and reduce tackiness in rubber, the process is known asa. Vulcanizingb. Calenderingc. Hardeningd. None

199. Aircraft rivets are identified bya. Head styleb. Alloyc. Length & diameterd. All

200. SAE 13XX representsa. Magnesium Steelb. Manganese Steelc. Silicon Steeld. Chromium Steelpg-93