Set-13 dtd 6/10/20151. Centre of cylindrical & round shaft is found by:a) Combination setb) Micrometerc) DTI

2. Pitch of metric micrometer is:a) 0.5 mmb) 0.05 mmc) 0.1 mmd) 0.01 mm

3. Part of thread joining two adjacent flank at bottom of groove:

a) Elankb) Gestc) Rootd) Depth of thread

4. D.P. is:a) No. of teeth per inch of pitch diameter & size of teethb) Imaginary circle on which teeth are locatedc) (a) & (b)

5. C.P. of spur gear is:a) Distance between corresponding point of adjacent point on

tooth at pitch circleb) Distance between root & crest

6. Scratches in highly stressed skin can cause:a) Crack at high speedb) Starting point for corrosion at high speedc) Cause filliform corrosiond) All

7. Binary equivalent of (296)10 is : a)(100101000)2

b)(111000000)c)(100001000)

8. Decimal equivalent of (111011)2 is a) (59)10

b)69c)58

9. Mark correct statement:a) And has logic of ‘1’ when both of input have logic ‘1’b) And has logic of ‘1’ when both of input have logic ‘0’c) And has logic of ‘0’ when both of input have logic ‘1’

10.Mark the correct statement:a) ‘OR’ gate has logic of ‘1’ when either input is oneb) ‘OR’ gate has logic of ‘1’ when input is ‘zero’

11.Machine level language is:a) Low level languageb) High level languagec) Not exist

12.Analog computer is:a) Less accurate than digital computerb) More accuratec) Some accuracy as digital

13.Volatile memory of computer is:a) Floppy diskb) Hard diskc) Compact diskd) Which is not saved & destroyed after power supply is off

14.In altimeter:a) 2 aneroid below are usedb) 3 aneroid below are usedc) Have barometric pressure setting scaled) All

15.In pitot static system, static pressure is measured at two points on either side of fuselage for:

a) Preventing position errorb) Formation of ice (reducing)c) Both (a) & (b)

16.A gyro having freedom of rotation in all three direction is:a) Space gyro or free gyrob) Tied gyroc) Space & rate gyro

17.Tied gyro is:a) It has freedom in two directionb) It has freedom in three direction & controlled by an

external sourcec) It has freedom in three directiond) It has freedom in three dimension & controlled by gravity

18.Peening is:a) Clogging of file teethb) Stretching of metal by hammering

19.In an enclosed area, in pressure of moisture sparking will produce:

a) Ozoneb) Hydrochloric acidc) Sulphuric acidd) Nitric acid

20.In basic computing system always use:a) One entry and two exit pointb) Two entry and one exit pointc) One entry & one exit pointd) Any no. of entry & exit point

21.Most common method of marking on stressed a/c structure:a) Electrogravingb) Vibratory percursionc) Metal stampingd) Etching or electro chemical method

22.Mark the correct statement:a) There is marking on shank of boltb) Swaged terminal are formed by rollingc) In case of large nut there in a marking on a mating partd) a/c parts are marked by clectrotoning method

23.Mark the correct statement:a) In brinnel hardness testing dia of impression is a measure

of metals hardness while in rockwell testing depth of impression is measured

b) In both, dia of impression is measuredc) In both, depth of impression is measured

24.Mark the correct statement:a) On a certain crystals, when voltage is applied then

mechanical stress is inducedb) When stress is applied then electric field is generatedc) When round wave is applied to cyrstal the a/c is generationd) All

25. If the driver gear has 60 teeth and it is moving with speed at 40, what will be the speed of driver gear if it has 20 teeth:

a) 100b) 120c) 60d) None

26. Lift is due to1) Pr-droop on upper surface of wing2) Pr-droop on lower surface of wing3) Velocity increase at lower surface of wing

27. Aspect ratio1) Span/Mean chord2) Span2/mean chord3) Span/area2

4) Span/area

28. If transformation ratio is 1:2 of on step up transformers then what about the secondary current:

1) current will double of original (primary current)2) current will be half of original3) no change in current4) current becomes one third

29. Purpose of vertex generator:1) High speed characteristic of wing2) Low speed characteristic of tail surface3) Both 1 & 24) Vertex generator is not used on tail surface

30. Ventral fin is used for which stability:1) Longitudinal stability2) Directional stability3) Lateral stability4) Both 2 & 3

31. If power = 28 watt, cmf = 28 volt what is R,1) 28Ω2) 30Ω3) 29Ω4) 1

32. Marks the correct statement:a) Tungsten is a type of thermionic emitterb) Toxicated tungsten is an indirectly heated cathodec) Oxide coated has less work function than tungsten or

thoriated tungstend) Both (a) & (c) are correct

33. Current transformers is:a) step upb) step down

c) Transformeation ratio is unit

34. Mark the correct statement:a) Transformer works on mutual induction principleb) It has eddy current & Cu losses while operationc) Transformer cores are laminatedd) All

35. Laminated core of transformers provides:a) Low reluctance path to magnetic fieldb) Low reluctance path to A.C. fieldc) High reluctance path to Magnetic fieldd) High reluctance path to A.C. field

36. Diode conducts when it is Reverse biaseda) Zener diodeb) PN Diodec) Act as voltage regulator

37. Mark the correct statement:a) Algorithm is set of program in a particular sequenceb) Pictoral representation of Algorithm is flow chartc) As in 2 & 3 flowchart makes the problem easierd) All

38. Microprocessor at least consist of:a) CPUb) ALUc) Memoryd) All

39. Which of the gate represent parallel switch circuit:a) ANDb) NANDc) OR

40. Series DC Generator has emf. At no load is:a) Maximum of rated voltageb) Minimum of rated voltagec) Maximum of rated voltage IR dropd) No induced emf.

41. Long shunted compound wound generator has:a) Shunt field across both armeture & revies fieldb) Series field across both armeture & revies fieldc) Shunt field across armature only

42. Self excited generator has:a) Permanent generatorb) Scparate DC sourcec) Electromagnetic coil which is magnetized by machines

current itselfd) All

43. Inter poles magnet or generator:a) has same poles as the previous one main poleb) has same poles as the incoming one main polec) as in (b) are connected inseries with armature coil

44. Polar inductor magneto:a) all magnet, coil & rotor are fixedb) magnet rotates and coil & soft iron core are fixedc) magnet & coil are stationary & rotor rotates

45. The range marking an instrument is in accordance with:a) manufacturer of instrumentb) type certificated data sheet (TCDS)c) TCDS & maint. & flight manual

46. Bareol tester is used for:a) steelb) cu, Al & others softer material

47. Color coding of O-ring gives:a) sizeb) shapec) fluid & vapour capability

48. Bunas rubber is used for:a) tyre & tubeb) oil pipe & fuel pipec) hy. Fluid pipe

49. Neoprene is non compatable for:a) weathersb) aeromatic fuelc) non-aeromatic fueld) neptha

50. Toluo is used:a) for thinner of paintb) for thinner of Zn chromatic primersc) a thinner for dope filmd) both (a) & (b)

51. Jo bolt is:a) internally threaded 2 pieces rivetb) externally threaded 2 pieces rivetc) internally threaded 3 pieces rivetd) externally threaded 3 pieces rivet

52. Hi-Tigue interference fit is used:a) in fatigue strength structureb) any straight shank fastner can be usedc) both (a) & (b)d) none

53. Hi-tigue has:a) interference fitb) chamfered fitc) reacesed hole

54. Bolt used to join terminal fitting to cable is:a) elevis boltb) hex headc) close tolerance

55. 18-8 steel is:a) 18% cr & 8% Ni C.R.S.b) carbon steel 18% cr & 8% Ni.c) Both (a) & (b)

56. Which cable is more resistance to fatigue:a) galvanized steel cableb) stainless steel cablec) carbon steel cable

57. Tang of drill:a) found on tapered shank drillb) assist in removing the shank from socketc) both (a) & (b)

58. Regarding margin of a drill mark the correct statement:a) margin to a drill prevent binding of drill during drillingb) is a difference between inner & outer diac) is a difference between helix angle & flute angled) both (a) & (b)

59. Trueness of surface plate is checked by:a) DTIb) Surface gaugec) Micrometer

60. Color of O2 & C2H2 hoses are:a) black & redb) red & blackc) white & redd) black & blue

61. Hoses have resisable fitting it consist:a) socket, sleeve & nutb) socket, nut & nipplec) clamp, nut & nippled) clamp, sleeve & nut

62. In x-ray depth of penetration depends upon:a) powerb) time of applicationc) thickness of specimen

63. Power factor is:a) true power (KWT apparent power (KVA)b) cosine of phase anglec) both (a) & (b)d) app. Power/true power & line of phase angle

64. Active component of current is:a) watt full elementb) watt less elementc) idled) both (a) & (b)

65. Excessive tightness of clamp on hoses cause:a) cold flowb) hot flow

66. Landing gear wheel alignment is done by:a) torque linkb) shock strutc) drag braced) all

67. Needle bearing is:a) radial typeb) axial typec) as in (a) & used where oscillatory motion is necessary

rather than rotaryd) as in (b) rather than rotary

68. Size of tube is an wall clutch numbers:a) out side dia in 1/16” incrementb) inside dia in 1/16” incrementc) outside dia in 1/32” incrementd) inside dia in 1/32” increment

69. Fatigue stress over a man caused by:a) emotional stressb) noise over 80 dbc) continuous workd) all

70. Exfoliation corrosion is:a) extensive case of intergranual corrosionb) formed at the grain boundaries & repartees the layer of

metalc) cleaned by mechanical meansd) both (a) & (b)

71. 2017 rivets are:a) heat treatable before drivenb) heat treatable after drivenc) non heat treatable

72. Tensile cable is:a) Alb) Stainless steelc) Nickel coated Cu or Ald) Timed Cu

73. Angle of achme thread is:a) 60ºb) 45ºc) 29ºd) 37º

74. Mark the correct statement:a) roll causes yaw & veer the a/cb) yaw cause roll & veer the a/cc) roll causes yaw & yaw caused rolld) none

75. Identification on hoses:a) geometric symbolsb) masks made up of C.C. (color code)c) wordd) all

76. Which view is used to show the location of object at an angle to plane:

a) sectional viewb) plan viewc) elevationd) auxiliary view

77. Avgas 100LL has color:a) dyed blueb) dyed redc) green

78. Additives are added to:a) prevent microbiological growthb) to act as antifreeze

c) to avoid detorationd) both (a) & (b)

79. When securing steel bolt in soft alloys:a) zinc coating is usedb) chromium coatingc) cadmium platingd) Ni-plating

80. Corrosion on Mg is cleaned by:a) HCI Sotb) Sulphuric acid sotc) 10% wt. by of chromic acid + 0.1% H2SO4

81. What is difference between Al oxide & iron oxide:a) iron oxide is porousb) Al oxide is porousc) Al oxide is non porousd) As in (c) it prevent further corrosion once formed

82. Interior cleaning of a/c is done by:a) detergent & soapb) phosphoric acidc) vacuum cleanerd) all are correct

83. Temperature inside furnace is measured by:a) pyrometerb) thermocouplesc) thesnmeter

84. In a parallel inductor, capacitor resonance circuit:a) no current flowb) maximum current flowc) have low resistance

85. Mark the correct statement:a) Rhcostat has three terminalb) Potentiometer has three terminalc) As in (b) & has low resistance valued) Rchostat has two terminals & has low resistance

86. In which type of soldering localized heating is used:a) Resistance Brazingb) Induction brazingc) Furnace brazing

87. Flux used for soft soldering:a) To prevent effect of oxidationb) To remove oxidec) To increase strengthd) All

88. Ultrasonic soldering equation is used for:a) Feb) Alc) Honeycomb

89. In tail wheel A/c when nose is in the direction of wind:a) Elevator is fully unpackedb) Elevator is fully downlockedc) Elevator is fully neutral positiond) 2” or 3” from neutral

90. Part of thread joining two adjacent blank at bottom of groove:

a) Flankb) Rootc) Depthd) Pitch

91. Scratches at high stressed skin can cause:a) crack at high speedb) starting point of corrosion at high speedc) causes filliform corrosiond) all

92. A gyro having freedom of rotation in all three direction is:a) Space Gyro or free Gyrob) Tied Gyroc) Space Gyrod) Rate Gyro

93. Mark alloying element of 2024 isa) Nickelb) Copperc) Silverd) Magnesium

94. Mark the correct statementa) AND has logic of ‘1’ when both L/P have logic ‘1’b) AND has logic of ‘1’ when both L/P have logic ‘0’c) OR has logic of ‘1’ when both L/P have logic ‘1’

95. In an enclosed area in pr of moisture sparking will producea) Ozoneb) HCl acidc) H2SO4 acidd) HNO3 acid

96. Most common method of marking on stressed A/C structure

a) Electro engravingb) Metal stampingc) Acid etchingd) Electrochemical method

97. Mark the correct statementa) There is marking on shank of boltb) Swaged terminals ate for sed by rollingc) Increase of large nut there is marking on mating partsd) A/C parts can be marked by electro etching.

98. When the length of heater is reduce what about wattage rating:

a) Increasesb) Decreasesc) Remain same

99. In Ni-Cd Battery electrolyte spillited in eyes what should be used:

a) Baking sodab) Water dilute solution of Boric acidc) Plenty of water

100. Modulus of elasticity:a) Stress/Strain within elastic limit

b) Stress/Strain above elastic limitc) Strain/Stress within elastic limitd) Strain/Stress above elastic limit

101. In a cell potential difference is the difference between on of electrode of cell to:

a) other electrode of cellb) Zinc platec) Carbon plate

102. Color of Zinc coated rivet:a) Yellowb) Silvery grayc) Pearl grayd) None