PART I
a) Al-alloy bolt smaller than ¼ mm diameter are not used in primary structure
b) Al-alloy bolts and nuts are used where they will be repeatedly removed for purpose of maintenance and inspection
c) Both are correct d) None of these
2. AN-73 drilled head bolt is similar to the
a) Close tolerance bolt b) Special bolt
c) Standard hex-bolt d) All of these
3. To-bolt is a trade name of
a) An internally treaded two piece rivet
b) An externally treaded three piece rivet.
c) An internally treaded three piece rivet
d) An externally treaded two piece rivet
4. During installation of To-bolt
a) The nut is turned while the bolt is held
b) The bolt is turned while the nut is held.
c) Bolt are turned at the same time d) None of these
5. The lock bolt combines the features of a
a) High strength bolt and nut b) High strength bolt and rivit
c) High strength bolt, rivet and nut d) None of these
6. Blind type lock bolts are
a) Used where only one side of the work is accessible
b) As a) & they have exceptional strength
c) As b) & sheet pull together characteristic
d) As c) & where it is difficult to drive a conventional rivet
7. 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 fork
d) None of these
8. Which of the bolt head code marking shown identifies a internal hex head bolt?
a) b) c)
1) a 2) b 3) c 4) 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 vibration
b) S.L.N are used where bolt or nut subject rotation
c) Both a) & b)
d) None of these
10. Elastic stop nuts are not used
a) Where temperature is lower than 250oF b) Higher than 250oF
c) Between 250oF to 750oF d) None of these
11. Special washers are used
a) Where a bolt is installed at an angle to a surface
b) Where perfect alignment with a surface is not required
c) Both a) & b)
d) None of these
12. The marking found on the head of the stud
a) Body diameter, length & shank type
b) Body diameter, length & head type
c) Only length d) None of these
13. Airloc pasteners consists of three parts
a) Stud, grommet and receptacle b) Stud & grommet
c) Stud, cross pin and receptacle d) None
14. 7x19 cable is made up
a) Seven strands of 7 wires b) Nineteen strands of seven wires each
c) Seven strands of nineteen wires each
d) 19 strands of 19 wires each
15. The diameter range of 7x19 cables are
a) 1/8 to 3/8”
b) 1/16 to 3/32”
c) 1/8 to ¼”
d) 1/8 to 1/16”
16. Turnbuckle assembly is a
a) Mechanical screw
b) Making minor adjustment in cable length and adjusting cable tension
c) Consisting two threaded terminals and a threaded barrel
d) All the above
17. Push-pull tubes are generally made in short lengths to
a) Prevent vibration and bending under tension load
b) Prevent vibration and bending under compression load
c) Only prevent vibration
d) None
18. Corrosion resistant steel cotter pin is used in locations where
a) Magnetic material is required b) Resistance to corrosion is desired
c) Both d) None
19. Which is correct statement
a) Pin rivet are used only in shear application
b) They should never be used where the grip length is less than the shank diameter
c) Both
d) None
20. Pin rivets
a) Hi-shear rivets
b) Used where access to both side of the material is required
c) They are approximately three times as strong as solid shank rivets
d) All
21. 10 KB 105
a) Flat head b) Flat head & countersunk
c) Countersunk d) None
22. 10 KB 107
a) Closed end and a key b) Flat head
c) As a and countersunk head d) None
23. AN 10 DH5A where H indicate
a) 5/8” diameter head drilled b) 5/8” diameter head and shank drilled
c) 5/8” diameter & shank drilled d) None
24. O-rings can be detected by
a) 4 – power magnifying glass
b) Small cracks, particles of foreign material or other irregularities are checked by rolling
c) Slight stretching of the ring checked by dowel
d) All
25. Clevis bolt are used for
a) Tension load b) Tension & shear load
c) Shear load d) None
26. Internal wrenching bolts are suitable for use in
a) Shear load b) Tension & shear load
c) Tension d) None
27. A cross inside triangle indicates
a) Close tolerance bolt b) Corrosion resistant steel bolt
c) Stainless steel bolt d) Screw
28. A/C screw is generally manufactured with
a) Class-1 fit of thread b) Class-2 fit of thread
c) Class-3 fit of thread d) Class-4 fit of thread
29. Generally speaking, bolt grip length should be
a) 1½ time the thicker material through which they extend
b) Equal to thickness of material + one diameter
c) Equal to thickness of material through which they extend
d) Any length
30. Stainless steel rivet head
a) Raised double dash b) Raised dash
c) Raised cross d) No marking on head
31. A hole is corroded which cannot be removed, is repaired by
a) Scrap out the part
b) Helicoil
c) Acres sleeve
d) Use special washer
32. Tw=100; Te=? Extension=5, A=20 (Torque wrench)
a) 150 in – lbs b) 125 in – lbs
c) 175 in – lbs d) 200 in – lbs
33. For shear joint
a) Clevis pin b)Taper pin c) Roll pin d) Cotter pin
34. Solid rivet of 1/8” diameter is replaced by (CAP)
a) Two rivet of 1/16” diameter
b) Three rivet of 1/16” diameter
c) Four rivet of 1/16” diameter
d) Cannot be replaced
35. Colour code for o-rings
a) Red dot for hydraulic fluid
b) Green dot for fuel
c) Yellow dot for skydrol fluid
d) d) None
36. For safetying turnbuckles, locking wire is used in
a) Single wrap b) Double wrap
c) Double wrap spiral d) All are correct
37. Dzus pastners consist of a stud, grommet and receptacle, stud length is measured in
a) Tenth of an inch b) Sixteenth of an inch
c) Hundredth of an inch d) Thousandth of an inch
38. A grub screw is a
a) Headless type set screw
b) Cap screw with fine threads
c) Machine screw with flat countersunk head
d) Cylindrical piece threaded at both ends and is plain in the middle
39. Grip length of cherry lock rivet is measured in increments
a) 1/8” b) 3/32” c) 1/16” d)1/32”
40. Identifying marks on the head of Al-alloy rivet indicate
a) Shank size b) Head treatment given by manufacturer
c) Specific alloy and by manufacturer d) All are correct
41. The solid shank rivet, which is used in interior of a/c, where maximum strength is needed –
a) round head b) brazier head
c) flat head d) as in c) & is AN-442
42. The standard range for counter sunk head angle is
a) 72˚ - 120˚ b) 78˚ - 112˚ c) 78˚ d) 100˚
43. To repair or replacement of protuding head rivet
a) round head b) counter sunk head is needed
c) universal head is used d) any rivet can be selected
44. For riveting Mg alloy sheet
a) 5056 rivet should be used. b) monel rivet should be used
c) mild steel should be used d) All of the above
45. Which material you select for riveting Ni-steel sheet
a) Monel b) 2017-T c) 2024-T6 d) Mild steel
46. Which one of the following rivet is ready for use as received & need no further heat treatment.
a) 2117 b) 2017-T c) 2024 d) 1100
47. “Ice-Box” rivets are
a)2017-T b) 2117-T c) 2024-T d) a) & c) are correct
48. The specification for universal head rivet –
a) AN-470 b) MS-20613 c) MS-20615 d) all
49. The protective film of zinc chromate over rivet identified by
a) its yellow colour b) pearl gray
c) its white colour d) its silver gray colour
50. Part No. – AN 470B 3 – 8 indicates
a) shank diameter is 3 ” b) rivet length is 8 ”
16 32
c) material is 5056 – Al alloy d) 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 rivet
a) D b) AD c) DD d) B
53. The absence of latter following the AN-standard number indicate
a) material is Al-alloy b) material is steel
c) material is mild steel d) any of the above
54. The head marking „Raised triangle‟, indicate the rivet is
a) 5056 b) 2219 c) 7075 d) Monel
55. The head marking for 2024-T is
a) raised dot b) raised double dash
c) raised three dash d) recessed double dash
56. The marking „recessed single dash‟ indicate the rivet is
a) QQW – 423 b) QQS-633 c) 2117 d) QQ1-281
57. The shank length used for making blind head in a „pull thru rivet‟ is
a) ½” – 1” b) ¼” - ⅓” c) 3/64” – ¼”
d) 3/64” – 1/8”
58. Its proven fatigue strength make it the only blind rivet interchangeable structurally with solid rivet is
a) wire draw cheeylock rivet b) dill lock rivet
c) bulb cherrylock rivet d) deutsch rivet
59. To joints requiring an excessive amount of „sheet take-up‟, you may select
a) pin rivet b) wire draw cherrylock rivet
c) bulb cherry lock rivet d) all of the above
60. Riv nut is
a) hollow, blind rivet b) made of 6053-Al alloy & a)
c) counter bored & thread inside d) all of the above
61. In Part No. – 10 KB 106, KB indicates
a) close end & keyless b) close end & keyed
c) open end & keyed d) open end & keyless
62. Part No. – 10 - B -107 indicates
a) Riv nut having flat head b) Pin rivet having round head
c) Riv nut having counter sunk head d) Deutsch rivet
63. Pin rivet -
a) not a blind type
b) have the same shear strength as bolt of equal diameter.
c) as in b) & are about 40% weight of bolt
d) all of the above.
64. Pin rivets are used
a) in compression b) in tension
c) in shear d) all of the above & also carry bending load.
65. The Part No. – NAS 177 – 14 – 17 indicates
a) flat head Jo-bolt b) flat head Avdelok fastener
c) flat head pin rivet d) counter sunk head, pin rivet
66. The hardware pre-lubricated & must not be degreased before assembly is/are –
a) Jo-bolt b) Avdelok Fastener
c) Both a) & b) are correct d) Huck mechanical lock rivet
67. The AN-3 to AN-20 (hex head a/c bolt) is
a) General purpose bolt b) Close tolerance bolt
c) Internal wrenching bolt d) 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 identified
a) by material b) by method of securing
c) a) & shape of head d) all of the above
70. The head marking on bolt indicate –
a) bolt material
b) name of manufacturer
c) 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) asterisk c) single raised dash d) two raised dash
72. For a bolt, part no. – AN3DD5A indicates
a) bolt is drilled for saftying b) material of bolt is 2017 Al-alloy
c) diameter bolt is 5/16” d) length of bolt is 5/8”
73. Eye bolt is used
a) 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 indicates
a) brazier head, stump type lock bolt b) flat head, stump type lock bolt
c) counter sunk, stump type lock bolt d) counter sunk, pull type lock bolt
76. The specification AN 335 indicates
a) fine thread, light hex nut b) fine thread, plain hex nut
c) coarse thread, check nut d) coarse thread, plain hex nut
77. Castellated shear nut is used
a) 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 nut
a) 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 is
a) Al-alloy b) Steel alloy c) Brass d) 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 250˚F.
ANSWER:-
1. D 2. C 3. C 4. B 5. B
6. D 7. A 8. B 9. A 10. B
11. A 12. B 13. C 14. C 15. A
16. D 17. B 18. B 19. C 20. D
21. A 22. C 23. D 24. D 25. C
26. B 27. A 28. B 29. C 30. B
31. C 32. B 33. B 34. C 35. C
36. D 37. C 38. A 39. C 40. C
41. D 42. B 43. C 44. A 45. A
46. A 47. D 48. D 49. A 50. C
51. A 52. C 53. C 54. B 55. B
56. A 57. D 58. C 59. B 60. D
61. B 62. C 63. D 64. C 65. D
66. C 67. A 68. D 69. D 70. C
71. C 72. D 73. C 74. D 75. B
76. D 77. D 78. C 79. C 80. B