Paper –II set-5 15/09/15

1. P.N. junction in transistor conducts in:a) Forward biasb) Reverse biasc) Bothd) None

2. Which fibre has higher compressive strength:a) Carbon fibreb) Ceramicc) kevlar

3. Mark the correct statement:a) Hot water quenching minimizes distortion and alleviates crackb) Large forgings and heavy sections can be quenched in hot or boiling water.c) High-velocity water sprays are useful for parts formed from clad sheet and for large sections of almost all alloys.d) All

4. Galvanometer is transferred in ammeter:a) By connecting low resistance in series to the galvanometerb) By connecting high resistance in series to the galvanometerc) By connecting low resistance in parallel to increase ranged) By connecting high resistance in parallel to increase range

5. Mark the correct statement:a) Off set screw drivers are constructed with both ends bent at 90º to the shankb) Rachet screw driver is used for heavy dutyc) Reed and prince screw driver is interchangeable with Philips sod) All are correct

6. Where high temperature is used for brazing:a) For high power solderb) Special type of flux is usedc) Not used for brazingd) None

7. High heat of Al-sheet from fire causes:a) Increase ductilityb) Decrease ductilityc) Increase resistanced) None (increase, conductance)

8. In artificial aging hardening is done at:a) Moderate temperatureb) Room temperaturec) Critical temperatured) None

9. Overnight parking shall be done:a) Position the a/c in down wind directionb) Position the a/c in up wind directionc) As in (b) and light a/c must be tiedd) As in (c) and heavy a/c must be tied

10. In double start thread:a) Lead is equal to pitchb) Lead is 2 times of pitchc) Pitch is 2 times of leadd) None

11. Hacksaw blade length is measured:a) Between center of end holesb) From the one end of blade to other end

12. Color of 2024-T Al-alloy is:a) Greyb) Greenc) Blue + yellowd) Red

13. In drawing which shows the position of part in relation to other is:a) Detail drawingb) Assembly drawingc) Installation drawingd) Sectioning drawing

14. The minimum distance between two clamps of a/c tube is:a) 16”b) 24”c) 8”d) 36”

15. Flare less tube fitting consists of following parts:a) Body, sleeve, flared tube and nutb) Body, sleeve and nutc) Sleeve, nut and end terminalsd) Sleeve, shoulder, beaded tube and nut

16. Color of fire extinguisher fluid line is:a) Yellowb) Brown or yellowc) Redd) Maroon

17. If two end terminals of PN junction is connected through a conducting wire than:a) A steady current flows from P-type to n-type materialb) No steady current flows from wirec) Steady current flows from n-type material to p-type material through wired) Any one of the above

18. A prime limitation with directly heated cathode is due to:a) Low frequencyb) Voltage fluctuationc) High frequencyd) Phase

19. Bottle jack is used for:a) Removing a wheel or complete single wheel assembly form one landing gearb) Only removing brake unit

c) Only removing single unitd) All of the above

20. During jacking the a/c outside the hanger:a) Face the a/c tail to wingb) Can be jacked in any directionc) Surface should be hard and leveld) None

21. Mark the correct statement:a) Straight flute reamer has a tendency to reduce chatterb) Buttoning reamer is tapped at bottom for starting aidc) Spiral flute reamer is tapped at bottom for aid in startingd) None

22. In a PNP transistor application, a solid state device is turned on when the:a) Base is negative w.r.t. the emitterb) Base is positive w.r.t. the emitterc) Emitter is negative w.r.t. based) Any one of above

23. Where is an AN-clevis bolt used in an airplane:a) For tension and shear load conditionsb) Where external tension load are appliedc) Only for shear load applicationd) Only for taking radial loads

24. To detect a minute crank using dye penetrant inspection usually requires:a) That a developer is applied to flat surfaceb) A longer than normal penetrating timec) The surface to be highly polishedd) Do not require excessive surface preparation

25. CPCP refers to:a) Control processing of computer programmeb) Corrosion prevention and control programmec) Corrosion prevention and cause detection programmed) Corroded parts corrugation programme

26. Mark the correct statement:a) ATA – code 30 indicates, lightb) ATA – 61 code indicates propellerc) ATA – 29 indicates power plantd) All are correct

27. When capacitive reactance becomes equal to inductive reactance of a circuit it is called:a) Phase-inb) Phase-outc) Resonantd) Impedance matching

28. PFD in reference to NDT means:a) Ultrasonic flow detectionb) Dye penetrant inspectionc) Anodic detection inspectiond) Eddy current testing

29. When a lead-acid battery is charged by constant current method, then its full charge can be detected as:a) Three testing of electricity gives same specific gravity valueb) Voltage stops risingc) Gassing will occurs rapidlyd) All above are wrong

30. What should be the first step of the procedure in sketching an a/c wing skin repair:a) Draw heavy guidenessb) May out the repairsc) Block in the viewsd) Draw extension lines

31. A cathode (election emitter) used in thermionic emission must have following characteristics:a) High matching pointb) High matching strengthc) Low work functiond) All above are correct

32. When bolts and rivets are used to joint the metal sheets, then both should be protected from corrosion by:a) Applying grease on bothb) By plating bolt and rivetsc) By painting bolt and rivetsd) They must be placed separately approximately, 2-times than the thickness of the metal being joined

33. Denting in metal tube is acceptable if:a) Not more than 10% of tune diameterb) Less than 20% of tube diac) Not more than 40% of tube diad) Must be rejected if dent occurs

34. Primary control surfaces are:a) Elevator, rudder, aileron and leading edge flapb) Elevator, rudder, aileron and trailing edge flapc) Elevator, slots, spoiler and flapsd) Elevator, rudder and aileron

35. Crazing in plastics occurs due to:a) Manganeseb) Phosphorusc) Silicond) Sulphur

36. Mark the correct statement:a) Single needle pointed end scriber should be sharp and surface should be checked for flatness with straight edgeb) Single needle pointed end scriber should be sharpc) 90º bend, scriber should not be sued as far as possibled) All of the above

37. If a line is divided into 25 division so that 25 divisions of this line is equal to 24 division of another line so that minimum distance that can be measured is equal to difference between the value of each division. It is the principle of:

a) DTIb) Micrometerc) Vernier scaled) Rules

38. Magnesium surface should be cleared with:a) Stiff-hog bristleb) Steel woolc) Crocus clothd) Steel wire brush

39. Which of the following frequency is used for space propagation:a) 2 KHZb) 30 MHZ and abovec) Upto 30 MHZd) 20 KHZ — 200 MHZ

40. Fusible metals are used for tube bending has:a) Low melting point and ductileb) Hard and high melting pointc) Should expand on solidifyingd) Both (a) & (b) are correct

41. For very accurate readings during such calibrations the thimble may be viewed under a microscope of:a) Low magnificationb) Medium magnificationc) High magnification

42. When hydraulic fluid lines and electrical line is passing through same portion of a/c structure:a) Hoses should be fitted above the wires and should be secured to a/c structure.b) Electrical wire should be fitted above and to secure to a/c structurec) A minimum of 4-distance should be maintained between two and any of two can be unstable aboved) Either of wire can be installed above and a minimum of

43. In straight and level flight:a) Lift = Drag & Thrust = Weightb) Lift = Thrust & Drag = Weightc) Lift = Weight & Drag = Thrustd) None of the above

44. Black smith anvil is made by:a) Machiningb) Forgingc) Extrusiond) Both (a) & (b)

45. Crevice corrosion caused due to:a) Metal and non-metal comes in contact and oil is present between themb) Contact between metal and non metalc) Plastic and metal contactd) Due to improper heat treatment

46. Modern computer consists of:a) Hardwareb) Softwarec) CPU, input/outputd) ROM, software and logic gates

47. Fretting corrosion occurs due to:a) Stationary parts are subjected to relative motion to each otherb) Direct contact with caustic liquid and battery fumesc) Improper beat treatmentd) Combination of tensile stress and corrosive environment

48. Amount of electron that can be stored on capacitor is proportional to:a) Both plate area and distance between themb) Plate area and does not depend upon distance between themc) Plate area and inversely proportional to distanced) Distance between plates and inversely proportional to area

49. Resistance for a straight conductor does not depends upon:a) Lengthb) Shape of class sectionc) Temperatured) Material

50. Working voltage of capacitor should be:a) At least 20% higher than appliedb) At least 50% higher than appliedc) Equal to applied voltaged) Less than 50% than applied voltage

51. Mark the correct statement:a) Philips screw driver has sharp endb) Reed and prince screw driver has blunt endc) Reed and prince screw has larger area in centerd) Both are interchangeable

52. For high speed a/c, it has wing:a) Thicker than low speed a/cb) Thinner than low speed a/c and thick wing tipc) Equal to low speed a/cd) Any one of the above

53. Digital system of computer is working on:a) Decimalb) Binaryc) Hexagonald) Octagonal

54. Close tolerance bolts:a) Can be used in machined partsb) Corrosion resistance areac) Tight fit is permissiond) Both (a) & (b)

55. Mark the correct statement:a) Prick punch is used to mark center mark for drilling purposeb) Center punch is used for removing binded rivets, bolts

c) Prick punch is used for making reference marks on sheet metald) All are correct

56. If the thimble scale zero mark is above the zero mark of barrel mark in micrometer, it indicates:a) Positive errorb) Negative errorc) Zero errord) None

57. Mark the correct statement:a) Turbo jet engines require shorter runway length than turbofan engineb) Turbo fan engines require lesser runway length for takeoffP than turbo jet enginec) Turbo jet engine produces more thrust than turbo fand) Both (b) & (c) are correct

58. After welding of butt joint:a) Heat treatment is required as cold working to be doneb) Heat treatment is not necessary as no cold working is to be performedc) With torch heat, heating the welded area only slightlyd) It is not necessary

59. Mark the correct statement in respect to fuelling:a) A/c can be grounded with carbon cabinb) Refueling van can be grounded with metal chain discharge behind the vanc) Both a/c and van are kept at euqal potential with a wired) All of the above

60. How many terminals can be taken out from stud:a) One terminal per studb) Two terminal per studc) Four terminal per studd) Any no. of terminals can be taken out from one stud

61. While de-fuelling the sweep back wing a/c:a) Outboard wing fuel tanks should be emptied firstb) Inboard wing fuel tanks should be emptied firstc) Empennage fuel tanks should be emptied firstd) Any one of the above

62. Mark the correct statement:a) Brinell hardness tester measure depth of penetration and reading is directly indicated on dialb) Bareel is sued for testing steelc) Rock wel tester measure dia of penetrationd) None of the above

63. Depth of screw thread is:a) Distance between root and creast measured ┴ to axib) Distance between creast of one thread and creast of adjacent threadc) Equal to line joining creast and rootd) None of the above

64. The ability to detect minute crack with radiography is called:a) Radiograph resolutionb) Radiograph sensitivityc) Radiograph processingd) Radiograph densitye) All

65. In plastics, minute crack occurring at weaker area due, to applied load and extends both sides:a) Crazingb) Creepingc) Fatiguingd) Crevice corrosion

66. Turn buckle consists of:a) Brass barrel with left and right hand threadb) Stainless barrel with either left hand or right hand threadc) Only cadinium plated steel barrel and end fittingd) None of the above

67. In selecting rivets:a) No type, and size depends on shear stressb) As in (a) and tensile strength and does not depends on bearing strengthc) Rivet dia should be twice the thickness of metal being joinedd) None of the above

68. If 1cm of main scale is divided in 20 equal division 24 division of main scale is divided in 25 equal division of vernier scale, least count is:a) 0.0002 cmb) 0.002 cmc) 0.2 cmd) 2.0 cm

69. Backlash in the gear can be measured by:a) D.T.I.b) Micro meterc) Thread gauge (filler gauge)d) Telescoping gauge

70. Nomex and kevlar are used for making composites as:a) They are used interchangeablyb) Both have some molecular sizec) Both have same internal structured) Both have same strength

71. Ballast is used for:a) Bringing the c.g. within c.g. pointsb) Leveling the lateral arm on central pointc) Both (a) & (b)d) None

72. Leveling of a/ca) Lateral leveling of H/A is more critical than L/Ab) Jacking points are located on longitudinal axis

c) Leveling is always done on longitudinal axisd) Leveling of lateral point is always done on longitudinal axis

73. Annealing is done on heat treatable parts to:a) Relief internal stresses set up during cold workingb) As in (a) and harden the metalc) As in (a) and soften the metald) None of the above

74. A micro switch will close or open a circuit with the movement of:a) 1 or moreb) 1 or lessc) Both (a) & (b)d) None

75. Capacitance of a capacitor is directly proportional to:a) Plate area and distance between platesb) Plate area and inversely proportional to distance between platesc) Distance between plates and inversely proportional to plate aread) None

76. Color of the fire, protection fluid line is a) redb) brownc) greend) brown and orange

77. A/c bolts are manufactured with always (FAA-9A,122)a) class 1 fitb) class 2 fitc) class 3 fitd) class 4 fit

78. Which of the following precision instrument is used for tightening the nut on bolt with proper torque is (FAA-9A,138)a) socket wrenchb) torque wrenchc) ratchet wrench

79. For repairing the oversize hole with sleeve, the hole must be drilled oversized by a) 3/16b) 1/32c) 1/64d) 3/64

80. 7 x 19 size of cable indicates a) 7 wires of 19 strandb) 7 strand of 13 wirec) 7 strand of 19 strandd) none

81. Clevis bolt used in fork end of cable fittinga) AN-CRS boltsb) NAS-CRS bolts

82. Intergranular corrosion is normally caused by a) internal stressesb) improper heat treatmentc) electrolyted) all of the above

83. Spilled electrolyte of lead-acid battery is neutralized by a) ammoniab) baking sodac) vinegard) both a & b

84. What type of battery charger is recommended for final charging of a Ni-cad battery(9A,315)a) Constant current chargerb) Constant voltage chargerc) Both a & bd) Any one of the above

85. Corrosion product in magnesium is removed by a) steel wire brush b) carborundum abrasivec) stiff hog bristle brush d) all of the above

86. Purpose of heat treatment of titanium is a) thermal hardening to improve strength b) annealing for subsequent workingc) relieve stressesd) all of the above

87. The process capacity of a computer is determined by a) MHZb) KHZc) RAMd) Frequency

88. Hardness testing method of steel is a) brinell or barcolb) barcol or Rockwellc) brinell or Rockwelld) none

89. T6 indicates a) artificially aged onlyb) SHT and cold workedc) SHT and their artificially agedd) Solution heat treated

90. Mental fatigue of human is caused by a) long period of dutyb) emotional stressc) noise d) all of the above

91. A micro switch will open or close a circuit with the movement of a) 1/16 or lessb) 1/16 or morec) both

d) none

92. Range of ammeter is extended by connecting a resistor with moving coil in a) parallelb) seriesc) any one of the aboved) none

93. Capacitance of a capacitor is directly proportional to a) plate area and distance is directly proportional to b) plate area and inversely proportional to distance between the platesc) distance between the plates and inversely proportional to plate aread) both a & b

94. Calculate the power when E=28 volts and R=10 (9A-284)a) 78.4 wattsb) 7.84 wattsc) 2.8 wattsd) 280 watts

95. If Z is impedance, r is internal resistance and R is external resistance, then a) Z=R+ rb) Z2=R2+r2c) Z=R2+r2d) None

96. Unit of radioactivity is a) Rutherford scaleb) Bequirelc) Both a & bd) None

97. Mark the correct statement a) straight fluted, reamer prevents chatteringb) spiral fluted reamer is tapered to aid in starting c) bottoming reamer is tapered to aid in startingd) none of the above

98. (110)2 is binary of decimal

a) 3 b) 5c) 6d) 7

99. Instrument panels are usually shock mounted to absorb ------ shocka) low frequency , high amplitudeb) high frequency, high amplitudec) low frequency, low amplituded) high frequency, low amplitude

100.Piston engine operation is based on a) charle’s lawb) brayton cyclec) boyle’s law

d) both a & c

101.End of steel bar sometimes painted in various colors and color combination as a mean of identifying different grade of steel a) solid colors identify the alloy and strips identify the carbon contentsb) strips identify the alloy and solid colors identify the carbon contentc) both a & bd) none of the above