Paper-II ( Sets)

7/30/2019 Paper-II ( Sets)

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Set -1

1. 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 wheretemperature exceed 250F.2. Which type of Synthetic rubber will bethe first choice for manufacturing ofaircraft tubeless tyre

a. Butyl rubber b. Neoprene rubberc. BUNA-N d. thiokol

3. Which synthetic rubber is chiefly used inaircraft hot air duct as sealing ring andwire insulation

a. Silicon rubber b.Polymethane rubber c. BUNA-S d.BUNA-N

4. Highest resistance to deterioration butlowest physical property is thecharacteristic of which kind of syntheticrubber.

a. GR I b. GR Sc. GR P d.

GR A

5. To valcanise thiokol rubber, whichelement to be added

a. Sulfur b. Sulfuroxide c. Zinc d. Zinc oxide

6. Which material is used formanufacturing of hydraulic booster pistonseal

a. Styrene butadiene seal b.Nitrile rubber

c. Flexon rubberd. Fluoro carbon rubber

7. Natural rubber attains fibrous structurewhen

a. It under goes at lowtemperature b. It is frozen

c. It is heated to 1300C d.It undergoes continues stress at normal

temperature

8. The grade of Kevlar fiber is used foraircraft structure

a. Kevlar 49 b. Kevlar 149 c.Kevlar 29 d. Kevlar 129

9. The composition for E glass is

a. Magnesia-alumina-silicate glassb. Lime-alumina

borosilicate glassc. Soda borosilicate glass

d. None of the above

10. Truly outstanding properties ofstrength competes with stronger steel iskind of fiber

a. S glass b. Hollowfibre glass c. A glassd. Carbon glass

11. Which composit material is difficult tocut or drill

a. Glass fibre b. Aramidc. Carbon / Graphite

d. None of above

12. Mark the wrong statement for carbon /graphite fibre

a. Is used to fabricate primary

structure b. It has high strength andhigh rigidityc. It takes compressive load

d. It is ductile in nature

13. Corrosion control techniques areemployed when corbon fibre is in contactto aluminium

a. A layer of fiber glass is used asa barrie

b. Aluminium is anodized, primedand painted prior to assembly

c. Both (a) and (b) will be appliedtogether


14. Which composite material is useful formaking aircraft parts that are subject tohigh stress and vibration

a. Fibergalss b. Aramid c.Carbon / Graphite d. None of these

15. Mark the correct statementa. Carbon fiber are electrically

non conductiveb. Carbon fibers have high

thermal expansionc. Carbon fibers have high fatigue

resistance

16. Boron fibers are made by sintering theboron elements on a thin film of material

a. Titanium b. Tinc. Tungsten d. All above

17. Which fiber material bears all tension,compression and bending stresses

a. Ceramic fiber b. Boronfiber c. Fiber glass d. Graphite fiber


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18. Mark the correct statement in FiberOrientation

a. Warp direction is designated at900

b. Weft is designated at 00

c. Bias is at 450 angle of fillthreads


19. For repairing of fabric, which weave tobe useda. Plain weave b. Basket weavec. Satin weave d. All of these

20. Find out the wrong answer: Hybrids ofcomposite material used in Aviation fieldare

a. Kevlar with carbon / graphiteb. Kevlar with fiber glass

c. Carbon / graphite with fiberglass d. None of these

21. In fiber science, which acts as a curing

agent a. Resin b. Matrixc. Catalyst d.

All of these

22. Plexiglass isa. Thermoplastic b.

Thermoset c. Laminatedd. None of these

23. Mark the correct answer:Apart from strongest adhesive

characteristics of epoxy resin, it has otheradvantages

a. Useful at very high temperatureb. It withstand bendingstress

c. Reasonable rigidity and flexibilityd. All of these

24. Mark the correct answer:The advantages of fillers to add to

resins area. To control viscosity and weight

b. To increase pot life andstrength

c. Both (a) and (b)d. None of these

25. Nomex is aa. Filler material b. Matrix

c. Reinforced fiber d.Core material

26. Tapered roller bearing supporta. Radial load b. Thrust load c.

Both (a) and (b)

27. Bearing used on high powered aircraftengine is

a. Ball bearing b. Rollerbearing c. Plain bearing d. Both (a) and (c)

28. Plain bearings are used fora. Connecting rods b. Crank

shaft c. Cam shaft d.All of these

29. Bearings are used to takea. Thrust load b. Radial

load c. Side load d.Both (a) and (b)

30. Bearing used where high compressivepressure, is generally made ofa. Babitt b. Bronze

c. Siliver bronze d. All of these

31. Bearing which offer more friction ismade of

a. Bronze b. Babittc. Silicon d.None of these

32. The amount of electricity a capacitorcan store is directly proportional to

a. Distance between the plate andinversely proportional to theplate area

b. Plate area and is not affectedby the distance between theplate.

c. Plate area and inverselyproportional to the distance

between the plated. None of these

33. The correct way to connect a test voltmeter in a circuit is

a. In series with a unit b.Between the source voltage and the load

c. In parallel with unit d.Both (a) and (c) are correct

34. Typical application of Zener diode is asa. Full wave rectifiers b.

Half wave rectifierc. Voltage regulator d.

Amplifier

35. The method used to rapidly charge aNickel Cadmium battery utilizes

a. Constant current and constantvoltage b. constant current and varyingvoltage

c. Constant voltage and varyingcurrent

d. Varying voltage and varyingcurrent


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36. What tasks are completed prior toweighing an aircraft to determine its emptyweight

a. Remove all items except thoseon aircraft equipment list, drainfuel and hydraulic fluids

b. Remove all items on theaircraft equipment list, drainfuel, compute oil and hydraulic

fluid weightc. Remove all items except thoseon the aircraft equipment list,drain fuel and fill hydraulicreservoir

d. All of these

37. Useful load of an aircraft is thea. Difference between the

maximum gross weight andempty weight

b. Difference between the netweight and total weight

c. Some of the empty weight and

the max. gross weightd. Weight of the fuel

38. Certain amount of slacks must be leftin flexible hose during installation becausewhen under pressure it

a. Expand in length and diameterb. Expand in length and contracts

in diameterc. Contracts in length and

expands in diameterd. Contracts in length and

diameter39. Excessive stress on fluid or pneumatic

metal tubing caused by expansion orcontraction due to temperature change canbest be avoided by

a. Using short, straight sectionsof tubing between fixed partsof aircraft

b. Not projecting the aircraft tosudden change in temperature

c. Providing bends in the tubingd. None of the above

40. Which heat treating process of metalproduces a hard, wear resistance surfaceover strong, tough core

a. Case hardening b.Annealing c. Temperingd. Hardening

41. Which of the following hose materialsare compatible with phosphate-ester basehydraulic fluids

a. Butyl b. Buna-Nc. Neoprene d. Buna-S

42. In a metal tubing installation

a. Rigid straight line runs arepreferable

b. Tension is undesirable becausepressurisation will cause is toexpand and shift

c. A tube may be pulled in if thenut will start on the threadedcoupling


43. Magnetic particles inspection is usedprimarily to detect

a. Distortionb. Deep surface flaw

c. Flaws on or near the surfaced. Flaws in plastic material

44. Which material cannot be heat treatedrepeatedly without harmful effects

a. Unclad aluminium alloys insheet forms

b. 6061- T9 Stainless steelc. Clad aluminium alloy

d. Carbon steel45. What is generally used in theconstruction of aircraft engine fire walls

a. Stainless steelb. Chromium

Molybdenum alloy steelc. Magnesium Titanium alloy steel

d. Wrought iron46. A fiber type self locking nut must neverbe used on an aircraft if the bolt is

a. Under shear loadingb. Under tension loadingc. Subject to rotation

d. All of these

47. Aircraft bolts are usually manufacturedwith aa. Class-I fit for the threadb. Class-II fit for the threadc. Class-III fit for the threadd. Class-IV fit for the thread

48. Hose and a few projecting globules arefound in a weld. What action should betaken

a. Re-weld the defective portions

b. Remove all the old weld and re-weld the jointc. Grind the rough surface smooth,

inspect and re-weld all gaps / holesd. Can be used in the same way49. Which condition indicate a part hascooled too quickly after being welded

a. Cracking adjacent to the weldb. Discoloration of the base metalc. Gas pockets and porosityd. Slag inclusion

50. Which tool is used to measure theclearance between the surface plates and a


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relatively narrow surface being checked forflatness.

a. Depth gauge b. Thickness gaugec. Dial indicatord. Vernier

Caliper

51. Which tool is used to find the center ofa shaft or other cylinder work

a. Combination set b. Dial

indicator c. Micrometer caliperd. Set square

52. What tool is generally used to calibratea micrometer or check its accuracy

a. Gauge block b. Dial indicatorc.Machinist scale d. None of these

53. When approaching the front of anidling jet engine the hazard area extendsforward of the engine approximately

a. 10 feet b. 15 feetc. 25 feet d.

35 feet

54. Which of the following is the mostsatisfactory extinguishing agent for use ona carburetor or intake fire

a. Dry chemicalb. A fine water mistc. Carbon dioxided. Form

55. When approaching the rear of an idlingturbo jet engine the hazard area extendsaft of the engine approximately

a. 200 feet b. 100 feetc. 50 feet d.

25 feet

56. When towing a large aircrafta. A person should be in the

cockpit to watch theobstruction

b. Person should be stationed atthe nose

c. Person should be positionedeach wing tip and theempennage

d. A person should be in thecockpit to operate brakes

57. A fuel that vaporizes too readily may

cause a. Hard startingb. Detonation c.Vapor lock d. None of these

58. The main difference between grades100 and 100LL fuel are

a. Volatility and lead contentb. Volatility, lead content and

colourc. Lead content and colourd. All of these

59. Tetra ethyl lead is added to aviationgasoline to

a. Retard the formation ofcorrosive

b. Improve the gasolineperformance in the engine

c. Dissolve the moisture in thegasoline

d. None of these

60. If the temperature of a confined liquidis held constant and its pressure istrippled, the volume will

a. Tripleb. Reduced to one third its original

volumec. Remains samed. Multiply by a fixed factor


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set -II1. Choose the correct sets of angles of setsquare of one piecea) 450 x 300 b) 300 x 900

c) 450 x 600

d) 600 x 600

2. Phantom line is used for indicating the_________ position of parta) Actual b) Hidden

c) Relative d)None of these

3. Mark the correct statementa) The arrow head length is equal todouble of its widthb) The arrow head length is equal to tripleof its widthc) The arrow head length is equal to itswidthd) None of these

4. Top view false on the


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a) Horizontal planeb) Vertical plane

c) Half in horizontal and half in Verticalplane d) All above cases may bepossible

5. Direction of rotation of external gearsarea) Opposite b) Same

c) Either a) or b) d) None ofthe above

6. S in Al-alloy designation indicatesa) Cast alloy b) Wrought alloy

c) As in b) and used for a/cstructure d) None

7. Which Al-alloy is more corrosionresistant?a) 2 S b) 3 S

c) 17 S d) 52 S

8. Al clad is generally of

a) 17 S & 24 S b) 24 S & 52 Sc) 52 S & 53 S d) 53 S & 62 S

9. Inter-crystalline corrosion is generallyoccurred ina) Al-alloy containing copper composition

b) 17 S c) 24 Sd) All of these

10. Which of the following material is usedfor spot welding?

a) Clad alloys b) 52 S Al-alloyc) Both a) & b) d) None of these

11. Natural rubber is a polymer ofa) Isoprene b) Neoprene

c) Diprene d) None of these

12. Which material is used for increasingthe hardness of natural rubber?a) Sulpher b) Phosphorus

c) Sodium d) Carbon

13. Which is the basic colour of

commercial BUNA-Sa) White b) Blackc) Red d) Green

14. GR-A is a known as BUNA-N, in whichA stands fora) Butadiene b) Acrylonitrile

c) Monovinyl d) Nitrile

15. Neoprene is designated as GR-M, inwhich M is stands

a) Monovinyl b) Chloroprenec) Acrylonitrile d) Styrene

16. GR-I designated for which type ofrubbera) Neoprene b) BUNA-S

c) BUNA-N d) Butyl

17. Which type of properties is introduced

in rubber after vulcanising process?a) Elasticity b) Strong nessc) Reduce the tackiness d)

All of these

18. A/C rivets are identified bya) Head Style b) Alloy c)Length & Diameter d)All of these

19. For accurate location of particular areaon an a/c, which of the following isnecessary?a) Water line b) Butt line c) As in a)

& b) in conjunction with station line d)None

20. Which type of corrosion is occurred instainless steel after electric arc welding?a) Pitting b) Galvanic

c) Inter crystalline d)Fretting

21. Which is most suitable for spotwelding, in stainless steel?a) Low-voltage b)High-amperagec) Low-voltage and High-amperage

d) High-voltage and Low-amperage

22. Which of the following is the Non-Magnetic?a) Inconel b) K-Monel

c) Monel d) All of these

23. SAE 13XX representsa) Magnesium Steel b) ManganeseSteel c) Silicon Steel d)Chromium Steel

24. Hot piece of metal is increased in

thickness and decreased in lengtha) Upsetting b) Down settingc) Swaging d)

Rolling

25. Which of the following have greatesttensile strength?a) Fibreglass b) Aramid

c) Carbon d) Ceramic

26. For flight equilibrium, designer tries tofix the CG


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a) and C of P togetherb) At rear of C of P

c) In front of most forward position of CPd) Along aerodynamic C of

P

27. Flight calculations are based on themagnitude and direction ofa) Lift & drag b) Weight & thrust

c) Lift & thrust d) Both a)& b)

28. The factors limiting the aspect ratio area) Structural consideration b)Drag considerationc) Lift consideration d)Both a) & b)

29. What is required to reduce the landingspeed?a) A low minimum drag coefficient

b) A small movement of C of Pc) A high max CL

d) A high value of CL3/2/CD

30. With increase in altitude pressure &temperaturea) Drops

b) Will risec) Pressure drops, temperature increases

d) Temperature drops,pressure increases

31. The disadvantage of vacuum operatedGyro is

a) At high altitude, stability is reduced dueto decrease in atmospheric pressure.b) Weight due to pipelinesc) Possibility of contamination by corrosionand dirt particles.d) All of these

32. Gyro of AC operated instrumentsutilize the principle of squirrel cageinduction motor and because of highfrequency of power supply, greater rotorspeeds are possible of approximate.

a) 23000rpm b) 24000rpmc) 24500rpm d) None

33. Indication of pitch & Bank attitude arepresented by the relative position ofa) Aircraft symbol b)Gyro stabilised bar (Horizon symbol)c) Both a) & b) d) None ofthese

34. Freedom of gimbal system movementabout the roll & pitch axes in gyro horizonis ______ respectivelya) 3600 and 900b) 3600 and 800c) 3600 and850 d) None

35. The reason for restricting pitchmovement of gyro horizon is to preventa) Gimbal error b) Gimbal lock c)

Transport wander d) None36. In single disk break, break linings areknown asa) Pucks b) Three are fix

c) Three are movable d) All above

37. When break pressure is released pistonmoves back to position with thea) Return spring force b) Hydraulicpressure c) Adjusting pind)None

38. To check the angle of the main

structural component in relation to thelongitudinal and lateral axis is known asa) Incidence check b) Dihedral check

c) Structural alignment check d)Verticality check

39. On copper and copper alloy corrosionforms on the surface asa) White powder b) Greenish film

c) Blue d)Black

40. Corrosion on the metal is due to

a) Chemical attack b) Electrochemical attackc) Both a) & b) d) None

41. During routine check, the fuselageshould be inspected fora) Corrosion b) Fretting

c) Spilage d) All ofthese

42. The truss type fuselage is covered bya) Steel sheet b) Al alloy sheet

c) Fabric d) All ofthese

43. Thermoplastic material is originallya) Hardb) Soft and pliable when exposed

to heatc) It retains the moulded shape whencooled d) All of these

44. Remoulding and reshaping cannot bedone ona) Thermosetting plastic b)Thermoplastic c) Both a) & b) d) None ofthese


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45. Plastic should be stored in bins whichare tilted ata) 200 b) 100

c) 150 d) 250

46. The operating frequency of ADF isa) 90Hz b) 90KHz c)150Hz d) 90KHz to 1800KHz

47. The ADF operates ona) LF Band b) MF Band

c) LF & MF Band d)VHF Band

48. In ADF antenna system at a pointsignal fades out this is calleda) Null position b) Figure of eight

c) Cardiod d) None of these

49. ADF receiver essentially isa) TRF receiver b) Superhetrodyne receiver

c) Double superhetrodynereceiverd) Suppressed carrier receiver

50. Types of antenna / antennas used forADF receivera) Half wave b) Full wave

c) Sense aeriald) As in c) and loop aerial

51. If a D flip-flop is to switch from 0 to 1,then input is to be kept high for at leasttime T wherea) T= t setup + t hold

b) T= t setup + t hold + tpropagation delayc) T= t setup + t hold - t propagation delay

d) T= clock period

52. JK Flip flop is dividing the inputfrequency by 2, then its condition isa) J=0, K=0 b) J=0, K=1

c) J=1, K=0 d) J=1,K=1

53. In decimal to BCD decodera) 1 input, 10 output b)10 input, 4 output

c) 4 input, 10 output d)10 input, 1 output

54. If SUB pin is high in a Adder-subtractorcircuit, then circuit is;a) Adding Two bytes

b) Subtracting input byte fromoutputc) Subtracting output byte from input d)Adding 2s complement byte to the otherbyte

55. One of the effect of negative feed backin amplifiers is toa) Increase the noise

b) Increase the harmonic distortionc) Decrease the bandwidth

d) Decrease the harmonicdistortion

56. The relationship between back emf and

applied voltage in case of a dc motor isgiven bya) Eb = V + Ia Ra b) Eb = V Ia Ra c) Eb = V d)None of these

57. The direction of rotation of dc motorcan be determined bya) Flemings right hand rule

b) Flemings left hand rulec) Lenzs law

d) Amperes law

58. An engine driven 50 Hz alternator has

a speed of 750 rpm. How many poles ithas?a) 6 poles b) 4 poles

c) 2 poles d) 8 poles

59. The frequency of emf generated by agenerator depends upon itsa) Speed b) No. of ploles c)Machine rating d) Both a) & b)

60. Two quantities are said to be in phasewith each other whena) The phase difference between twoquantities is zero degrees

b) Each of them pass through zero valuesat the same time and rise in the samedirectionc) Both a) & b)d) None of these61. Capacity of a capacitor depends upona) Separation between the plates

b) Area of platesc) Di-electric material

d) All of these62. The device used to measure very highinsulation resistance of electric cable isa) High resistance voltmeter

b) Megger / Insulation resistance

testerc) Iron vane meterd) Ammeter of high range

63. If six cells are connected in series ofeach E volts, the total voltage of thebattery will bea) 6E b) 3E

c) 4E d) 12E64. Special test equipment comprising ameter and two cables each of specificlength, is required for checking theresistance of bonding. A meter widely


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used , consists of an ohm-meter operatingona) Principle of current ratio b)Principle of voltage ratio c)None of these

65. Cell phone is used to protect the Ni-Cad battery froma) Shorting between plates

b) Thermal runawayc) Avoid leakage of electrolyte d)All of these66. Which material you select for rivetingNi-steel sheeta) Monel b) 2017-T

c) 2024-T6 d) Mildsteel67. Which one of the following rivet isready for use as received and need nofurther heat treatmenta) 2117 b) 2017-T

c) 2024 d) 1100

68. Ice-Box rivets area) 2017-T b) 2117-T

c) 2024-T d) Both a)& c)

69. The specification for universal headriveta) AN-470 b) MS-20613

c) MS-20615 d) All ofthese

70. Part No AN 470 B 3-8, indicatesa) Shank dia is 3/16

b) Rivet length is 8/32

c) Material is 5056-Al alloyd) All of the above

71. Fluid used in the Aircraft hydraulicsystems area) Vegetable b) Mineral

c) Synthetic d) All ofthese72. With pure rubber seals and hose oilused in the system isa) Mineral b) Vegetable

c) Synthetic d) All of these73. In open centre system, the number ofservices can be operated at one time is

a) One only b) Two onlyc) Any number d) All of these

74. In closed system where fixed volumepump is fitted, the system is fitted with

a) Automatic cut out value to divert pumpoutput to reservoirb) To maintain the normal built uppressurec) Both a) & b)d) None of these75. Pressure maintaining value fitted in thesystem is fora) To maintain the normal system pressure

b) To safe guard the operation of theimportant servicesc) To maintain the pressure in primaryservices at a value suitable for operation ofservicesd) Both b) & c)76. Packing is made ofa) Asbestos b) Cork c)Synthetic or natural rubber d)Felt77. Aviation gasoline is having relativedensity ofa) 0.70 b) 0.72

c) 0.80 d) 0.5

78. Re-fuller delivery line should have filterofa) 5 microns b) 8 microns

c) 4 microns d) 10microns79. Component fitted in pressurizationsystem to limit any possible negativedifferentiate pressure to a sage value isa) Safety value b) Outflow value

c) Inward relief value d) pressurecontroller.

80. Roots type blower pressurized andsend air to cabin duct by taking

a) Ram air b) Air from exhaustc) Bleed air d)None of these

SET -III

1. Duckbill pliera) Is a flat nose plier b)Is used for twisting safety wiresc) Have serrations on their jaws d)

All are correct

2. Needle nose pliers are used fora) Extracting thin/sharp components

b) Extractingnailsc) Gripping small electronic components

d) All are correct

3. i) A chisel can never cut the material allby itselfii) A die is a cutting tool

a) Only i) is correct b)Only ii) is correctc) Both i) and ii) are correct d)Neither i) nor ii) is correct


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4. Cutting edge of a chisel is generallyground to an angle ofa) 30 degrees b)70 degreesc) 90 degrees d)110 degrees

5. Various types of cut of a file area) Single cut b)

Smooth cutc) Rasp d) Both a)& b) are correct

6. Bearing strength of a material refers toa) Direct tensile load it can bearb) Resistance to tear at the point of appliedloadc) Resistance to fracture at the point ofapplied loadd) Resistance to shear

7. Characteristics of metals relating todrawing it into wire is

a) Tensile strength b)Malleability c) Ductilityd) Brittleness

8. Fusibility of a metal refer to its propertythat permitsa) Welding b)Drawing into thin sheetsc) Drawing into wires d)Good thermal conductivity

9. Aluminium alloy 1100 impliesa) Pure aluminium b)It contains 11% copper

c) It contains 111% zinc d)Heat treated alloy

10. Clad aluminium alloys are used inaircraft. They area) Lighter than other aluminium alloysb) Stronger than unclad aluminium alloysc) Easily heat treatabled) Less susceptible to corrosion11. Medium carbon steels have a carbonpercentage ofa) 0.1 0.3 b)0.3 0.5c) 0.5 1.0 d)

1.0 2.0

12. Which of the statement is correct?a) Both heat treatable & non heat treatablealuminium alloys can be strain hardenedb) Strain hardening is same as coldworkingc) Strength & hardness increases duringcold workingd) All are correct

13. Find out the wrong statementregarding titaniuma) It is highly corrosion resistant b)It maintain strength at elevatedtemperaturesc) It has good resistance to creep d)It is magnetic

14. Pitot static system have heating

elements toa) Remove moisture from the airb) Prevent ice formation

c) To permit flying at high altituded) All are correct

15. Pressure heads of pitot static systemshould not be painted, because ita) Impairs their thermal efficiency

b) May cause obstruction of orificesc) None of the above

d) Both a) and b) are correct

16. i. In cross filing, the file is moved

length wise across the workii. In draw filing, the file is moved side wiseacross the worka) Only i) is correct b)Only ii) is correctc) Both i) and ii) are correct d)Neither i) nor ii) is correct

17. A cross cut saw hasa) 4-6 teeth per inch b)6-12 teeth per inchc) 10-15 teeth per inch d) 12-18teeth per inch

18. i) For a good cut on a hard material, ablade with more teeth should be usedii) While cutting a tube, a blade should beso chosen that at least five teeth are thereon each side of the tube as it is cuta) Only i) is correct b)Only ii) is correctc) Both i) and ii) are correct d)Neither i) nor ii) is correct

19. Spiral anger bit for drilling holes inwood area) Generally 7-10 inches long

b) - one inch in diameter

c) Used only with a bow type hand braced) All are correct

20. Screw driver used when there is noclearance for normal screw driver is calleda) Closed area screw driver

b) Stubby screw driverc) Off set slot screw driver

d) Any one of the above

21. Air driven power screw driver shouldbe used


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a) For large diameter screwb) For removing screw that are jammedc) Where large number of screws are to beremoved and fitted backd) When removing screws from hardermaterial22. With regard to wrenches, find out theincorrect statementa) These are made from chrome vanadium

steelb) These are generally die castc) Wrenches are made in various shapes &sizesd) These are plated to improve theirappearance

23. Box end wrenches are useda) To loosen nuts that are exceptionallylightb) Where there is restricted spacec) For nuts that are bigger than one inchsized) When open end wrench is not available

24. Crowfoot socket wrench is used wherethe following cannot be useda) Open end wrench b)Box end wrenchc) Standard socket wrench d)All are correct

25. 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

26. During nitric acid test, if the materialshows strongly magnetic nature, then it isa) Monel metal b) Carbonsteelc) Nickel steel d)18-8 steel

27. Weldability is poorest in case ofa) Plain carbon steel b)Low carbon steelc) High carbon steel d)

Wrought iron

28. Stainless steel is corrosion resistancedue to presence ofa) Silicon b)Cobaltc) Chromium d)Manganese

29. L shaped channels are produced bya) Forging b)Extrusion

c) Machining d)Casting

30. Creep in metals isa) Elongation due to temperatureb) Temporary elongation due totemperature and stressesc) Permanent set due to stresses and hightemperature operation

d) All are correct31. Angular momentum isa) Moment of inertia b) Angularvelocityc) Product of a) & b) d) Sum of a) & b)

32. Mark the incorrect statementa) Precession is inversely proportional tothe strength & direction of applied force.b) Precession is inversely proportional tothe moment of inertia of the rotor.c) Precession is inversely proportional tothe angular velocity of the rotor.

d) None of the above

33. Control of drift, relating to horizontalgyroscopes can be achieved by:a) Calculating corrections using earth rateformula and applying them as appropriateb) Applying fixed torques & cause gyro toprocess at a rate equal & opposite to theearth rate.c) As in b) but which can be variedaccording to latituded) All of these

34. When gimbal orientation is such that

the spin axis becomes coincident with oneor the other of the axes of freedom whichserves as attitude displacement referenceis termed asa) Gimbal lock b) Gimbal Errorc)Apparent drift

35. Grip length of the bolt isa) Total length of the bolt

b) Plain shank length of the boltc) Length under the head to the end of thebolt d) None of these

36. In close tolerance bolt, force applied to

drive in isa) 10 ounce hammerb) 20 ounce hammer

c) 12 to 14 ounce hammerd) Sledge hammer

37. Special washer AC 950 and AC 955 areused where


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a) Bolt is installed at angle to surfaceb) Bolt is installed head

downc) It can be used any where

d) None of these

38. Rasp file is used fora) Hard material b) Lead,wood or leather

c) Both a) & b) d) Other materialsexcept lead, wood & leather

39. Philips screwdrivers are tapered to anangle ofa) 730 b) 530

c) 600 d) 930

40. Snaps are used toa) Support the markers head of rivets

b) To make the shop head duringrivetingc) Both a) & b) d)None of these

41. Soft solder is the combination of tinand lead in proportion ofa) 2 : 3 b) 3 : 2

c) 1 : 4 d) 4 : 1

42. Bending stress is the combination ofa) Compression and shear

b) Shear and tensionc) Compression and tension

d) Tension and shear

43. In true monocoque constructionprimary stresses is taken by

a) Skin b) Framesc) Bulkhead d)Longerons

44. The skin of semi monocoque fuselagecarriesa) No load b) Full load

c) Part of the load d) Half ofthe load

45. The longitudinal stability of aeroplaneis dependent ona) Position of C of G b)Movement of C of P on the main plane and

fuselagec) Area of the tale plane, its aspect ratio,distance from C of G d) All ofthese

46. Direction of rotation of external gearsarea) Opposite b) Samec) Either a) or b) d) None ofthe above

47. Al clad is generally of

a) 17 S & 24 S b) 24 S & 52 Sc) 52 S & 53 S d) 53 S &

62 S

48. Natural rubber is a polymer ofa) Isoprene b) Neoprene

c) Diprene d) None of these

49. Which is the basic colour ofcommercial BUNA-Sa) White b) Black

c) Red d) Green

50. Which type of corrosion is occurred instainless steel after electric arc welding?a) Pitting b) Galvanic

c) Inter crystalline d)Fretting

51. SAE 13XX representsa) Magnesium Steel b)Manganese Steel

c) Silicon Steel d) Chromium Steel

52. Hot piece of metal is increased inthickness and decreased in lengtha) Upsetting b) Down setting

c) Swaging d)

Rolling53. The factors limiting the aspect ratio area) Structural consideration b)Drag considerationc) Lift consideration d)Both a) & b)

54. The disadvantage of vacuum operatedGyro isa) At high altitude, stability is reduced dueto decrease in atmospheric pressure.b) Weight due to pipelinesc) Possibility of contamination by corrosionand dirt particles.d) All of these

55. Gyro of AC operated instrumentsutilize the principle of squirrel cageinduction motor and because of highfrequency of power supply, greater rotorspeeds are possible of approximate.

a) 23000rpm b) 24000rpmc) 24500rpm d) None

56. During routine check, the fuselageshould be inspected fora) Corrosion b) Fretting

c) Spilage d) All ofthese

57. The truss type fuselage is covered by


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a) Steel sheet b) Al alloy sheetc) Fabric d) All of

these

58. Two quantities are said to be in phasewith each other whena) The phase difference between twoquantities is zero degreesb) Each of them pass through zero values

at the same time and rise in the samedirectionc) Both a) & b)d) None of these

59. If six cells are connected in series ofeach E volts, the total voltage of thebattery will bea) 6E b) 3E

c) 4E d) 12E60. Which one of the following rivet isready for use as received and need nofurther heat treatmenta) 2117 b) 2017-T

c) 2024 d) 110061. When calculating power in a reactive orinductive ac circuit, the true power isa) More than the apparent powe

b) Less than the apparentpowerc) As in b) in reactive circuit and as in a) ininductive circuitd) None of these

62. The correct way to connect a testvoltmeter in a circuit isa) In series with the unit

b) Between the source voltage andthe loadc) In parallel with the unit

63. Transfer of electrical energy from oneconductor to another without the add ofelectrical connectionsa) is called induction b) is calledair gap transferc) Will cause excessive arching and heat,and as a result is impractical

64. Diodes are used in electrical powercircuit primarily asa) Switches b) Rectifiers

c) Relays d)Contactors65. If three resistors of 3, 5 and 22 ohmsare connected in series in a 28V circuit,how much current will flow through the 3ohms resistor?a) 9.3 amps b) 1.05 amps

c) 0.93 amps d) 10.05amps

66. What is the value of a resistance ifgiven colour codes as brown, black, brown,black and brown.a) 1010 ohms b) 1000 ohms

c) 101 ohms d) 10.1 Kohms

67. What is the value of a capacitor ifgiven colour codes are orange, orange,

blue and white.a) 33nF b) 33F c) 33pFd) 3300F

68. The output of a astable multi-vibratorisa) Triangular wave b) Sawtooth wave c) Sinusoidal wave

d) Square wave69. In an oscilloscope by varying intensitycontrol, what actually varied internally?a) Cathode voltage b) Anodevoltage c) Grid voltage d)Cathode current70. The output of NOT gate is always

a) High b) Low c)Same as inputd) Complementary of input

71. Oxy acetylene welding process issuitable for joining metal sheets and plateshaving thickness ofa) 1 to 30mm b) 2 to 50 mm

c) 2 to 40mm d) All of these

72. In oxyacetylene welding, welding rod isrequired as a filter metal when welding iscarried out above

a) 15mm b) 10mmc) 40mm d) 5mm

73. In oxyacetylene welding, neutral flameproduces a maximum temperature ofa) 30000F b) 32000F

c) 32000C d) 30000C74. Standard colour for oxygen hose isa) Black b) Red

c) Green d) None ofthese75. In magnet steel, the alloying elementsarea) Nickel, Cobalt

b) Silicon, Nickelc) Molybdenum, Copperd) Tungsten, Cobalt

76. Maximum distance between support forfluid tubing of 1/8 size of steel isa) 12 b) 14

c) 9.5 d) 11.577. MS 20004 is aa) Internal wrenching bolt

b) Close tolerance boltc) Clevis bolt

d) None of these


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78. Mark the incorrect statement,regarding K monel metala) It is ferrous alloy

b) It is used for gears and chainc) It is non ferrous alloy

d) It is corrosion resistant79. The symbol is fora) Wood b) Cast iron

c) Steel d) Rubber80. Ballast is used on a/ca) To attain the desired c.g. b)To increase the weightc) For making noseheavy d) None of these

1. Which of these is indicator ofelasticity & plasticity both?a) Rockwell hardness test

b) Brinell hardnesstest

c) Shore Scleroscoped) Vickers hardnesstest

2. Flattening test isa) Bending test b) Only forcopper wires c) For tubetesting d) Both a) & c)

3. Max rate of bending perminute in reverse bend test is

a) 50 b) 60c) 10 d) 40

4. Izod test measuresa) Toughness b)Height of upswing c)Energy in breaking d)Hardness


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5. Fatigue test is fordetermininga) Stress in material b)Strain in rodc) Stress limit for material d)Elongation of wire

6. Torsion test is essential fora) Wires b) Tube

c) Rods d) Sheet

7. Bending test indicatesa) Ductility b) Brittleness

c) Hardnessd) Density

8. 250 HB 10 indicatesa) Strength only b) Hardnessonly c) Both a) & b) d)Toughness

9. Unit of tension isa) N b) N/m

c) KN/m2 d)Kg/cm2

10. First usable ferrous product

obtained by smelting ores in ablast furnace isa) Pig Iron

b) Wrought Ironc) Cast Iron

d) Steel

11. Siderite isa) Oxide ore of Iron

b) Carbonate

ore ofIronc) Sulphide ore of Irond) Flux used in

furnace

12. Coke used in blast furnace isa) Fuel

b) Flux

c) Reducing agentd) Both fuel &

reducing agent

13. In upper reduction zone, wegeta) Iron

b) Carbondioxidec) Carbon monoxide

d) Both Fe &CO2

14. Steel is alloyed to improvea) Hardenability

b) Toughnessc) Fatigue strength

d) All of theabove

15. Cast Iron sparks area) Red

b) Whitec) Straw coloured

d) First Red thenStraw coloured

16. Corrosion resistant steel

used in Aircraft construction isa) 18 8 steel

b) Mediumcarbon steelc) 18 6 steel

d) Silicon steel

. Major alloying elements ofstainless steel are ( in order of% composition)

a) Ni Cr b) Ni Vc) W Ni

d) Cr Ni

18. Forging steel isa) Low Carbon steel

b) MediumCarbon steel


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c) High Carbon steeld) Either a) or

c)

19. Exhaust collector is made upofa) Silicon steel

b) Titanium steelc) Chromium steel

d) Ni Crsteel

20. Which element isresponsible for Red hardnessproperty?a) Ti b) Ta

c) Mo d) W

21. Which elements areresponsible for Penetrationhardness?a) Mn, S b) Mn, P

c) Mn, Cr d) Cr, C

22. Stainless steel isa) Ni Cr steel b) Cr Mosteel c) Ni W steel d) Cr Va steel

23. Silicon in steel acts asa) Oxidiser b) Deoxidiser

c) Impurity d)Both b) & c)

24. Mark the correct statementa) SAE 2330 is chromium steel

b) SAE 3250 is used in making

axle shafts because of highstrengthc) SAE 3115 is used for makingpiston pins, cam rings

25. Steel is preheated beforewelding toa) Include strength b)Enhance its creep resistance

c) Enhance its creep resistance

26. Steel used for wing-hingefittings & flying wire trunnions isa) SAE 4140 b)SAE 6150 c) SAE1015

27. Steel used commercially forautomatic machine production isa) SAE 4135 b)SAE 4615 c) SAE611528. Steel used as an alternatefor SAE 4130 steel isa) SAE 8620 b)SAE 8630 c) SAE

926029. Pyrometer is used toa) Measure the temperature

b) Protect thefurnacec) Give protective atmosphere

30. The fastest rate of cooling isgiven bya) Brine b)

Oil c) Water

31. The tip of the rivet is upsetto form a second head and thatis known asa) Round head b) Shophead c) Flat head d)Brazier head

32. O ring packings are used forpreventinga) Internal leak b) Externalleak c) One direction leakd) Both a) & b)

33. Gaskets are made of


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a) Asbestos b)Copper c) Cork

d) All of these

34. While bending tubing, asmall flattening is allowed butthe small diameter of the bend

should not be less than_______ of the outsidediametera) 90% b) 25%

c) 75%d) 80%

35. Deep permanent impressionin the hose produced by thepressure of hose clamp is known

asa) Hot flow b) Deep flowc) Cold flow d)

None of these

36. In hex bolt, the length ismeasureda) Under the head to the end ofthe bolt b) Plainportion of the shankc) Total length

d) Threadedlength

37. Aircraft bolts are made ofa) Mild steel b)Stainless steel c)Aluminum alloyd) Cadmium plated nickel steelcorrosion resistance steel andaluminum alloy

38. Fluid used in the Aircrafthydraulic systems area) Vegetable b)Mineral c) Synthetic

d) All of these

39. Vegetable based fluid isnormally

a) Pink b)Yellow c) Almostcolourless d) None ofthese

40. With pure rubber seals andhose oil used in the system is

a) Mineral b) Vegetablec) Synthetic

d) All of these

41. In open centre system, thenumber of services can beoperated at one time isa) One only b) Two only

c) Any number d) All ofthese

42. When no services areoperated in open centre system,the pressure value in thesystem isa) At low value

b) At highvaluec) Pump output passes directlyto the reservoir d) Botha) & c)

43. In closed system wherefixed volume pump is fitted, thesystem is fitted witha) Automatic cut out value todivert pump output to reservoirb) To maintain the normal builtup pressurec) Both a) & b)

d) None of these

44. Thermal relief value fitted inthe hydraulic system operatesat a pressurea) Slightly higher than normalsystem pressureb) Relieve only a small quantityof fluid


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c) At lower than the systempressured) Both a) & b)

45. Pressure maintaining valuefitted in the system is fora) To maintain the normal

system pressureb) To safe guard the operationof the important servicesc) To maintain the pressure inprimary services at a valuesuitable for operation of servicesd) Both b) & c)

46. Restrictor valve fitted in thehydraulic system for

a) Allowing free flow of fluid inone direction b)Limited flow in other directionc) To control the pressured) Both a) & b)

47. Packing is made ofa) Asbestos b) Cork

c) Synthetic or naturalrubber d) Felt

48. Running seals area) Packing b) Gasket

c) Wiper d) Noneof these

49. Washer (gasket) used forspark plug isa) Asbestos b) Copper

c) Cork d) All of these

50. Gasket used on uneven orvarying space is made ofa) Asbestos b) Cork

c) Copper d) All of these

51. Seals used for cleaning andlubricating is called

a) Wiper b) Gasketc) Packing d) None

of these

52. Fuel used for turbo jetengine isa) Gasoline b) Aviation

kerosene c) Petrol d)None of these

53. Aviation gasoline is havingrelative density ofa) 0.70 b) 0.72

c) 0.80d) 0.5

54. Relative density of AVTUR

fuel isa) 0.80 b) 0.72

b) 0.75 c) 0.70d) 0.72

55. Re-fuller delivery line shouldhave filter ofa) 5 microns b) 8microns c) 4 microns

d) 10 microns

56. The source of pressurisedair in piston engine aircraft isa) Compressor b)Supercharger c) Turbocharger d) Both b) & c)

57. Component fitted inpressurisation system to limitany possible negative

differentiate pressure to a sagevalue isa) Safety value b)Outflow value c) Inwardrelief value d) pressurecontroller

58. To maintain a free flow ofventilation air within the aircraft


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when parked the component isfilled toa) Safety value b)Ground automatic relief valuec)outflow value d) Both a) &c)

59. Roots type blowerpressurised and send air tocabin duct by takinga) Ram air b) Air fromexhaust c) Bleed air

d) None of these

60. Engine driven cabincompressor which is used onturbo prop aircraft, its output

pressure is controlleda) Automatically b)Manually c) Notcontrolled d) Both a) & b)

61. The working fluid used inreciprocating engine isa) Solid fuel b)Oxidizer & Fuel c) Fuel /Air Mixture d) All of these

62. Mark the correct statementa) Turbo prop engine acceleratelarge mass of air through smallvelocity changeb) As in a) & Piston Engine alsoaccelerate large mass of airthrough small velocity changec) Turbo Jet Engine acceleratelarge mass of air through small

velocity changed) Pulse Jet Engine acceleratelarge mass of air through smallvelocity change

63. To compress the engineworking fluid, Piston Engineuses

a) Turbine driven compressorb)

Pressure rise due to combustionc) Positive displacement, pistontype compressor d) Botha) & c) are correct

64. Piston engine classifiedaccording toa) Thrust

b) No. ofstrokec) Cylinder arrangement withrespect to crank shaft d)Both b) & c)

65. Radial engine classified as

a) Upright, invertedb) Accordingto no. ofrowsc) Cylinder arranged on camshaft d) Both a) & c)

66. The emitter resistor RE in atransistor amplifier is bypassedby a capacitora) To reduce the voltage gain

b) To increase thevoltage gainc) Causes thermal runaway

d) Stabilises the Qpoint

67. A transistor is operating inthe active region. Under thisconditiona) Both the junctions are

forward-biasedb) Both the junctions arereverse-biasedc) Emitter-base junction isreverse-biased, and collector-base junction is forward-biasedd) Emitter-base junction isforward-biased, and collector-base junction is reverse-biased


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68. The potential-dividermethod of biasing is used inamplifier toa) Limit the input ac signalgoing to the base b) Makethe operating point almost

independent of c) Reduce the dc base current

d)Reduce the cost of the circuit69. For generating 1 KHz note,the most suitable circuit isa) Hartley Oscillator

b) Colpits Oscillatorc) Tuned-collector Oscillator

d) Wein-bridge

Oscillator70.To generate a 1 MHz signalthe most suitable circuit isa) Wein-bridge Oscillator

b) Phase shiftOscillatorc) Colpits Oscillator

d) Hartley Oscillator

71. Weather radar works on

a) Echo system b) LOSsystem c) VHF system

d) HF system

72. Antenna size for DME isa) 1 b)

c) /4 d)/8

73. EDAS means

a) Electrical and digital Aircraftsystemb) Electronics / digital Aircraftsystemc) Electronics digital andavionics systemd) None of these

74. The purpose of EDAS is

a) Modernise the variousAircraft system and their displaysystemb) To reduce the work load ofthe pilotc) To reduce the space in theAircraft

d) All of these

75. The satellites are placed ingeo-synchronous orbit for satcom system and they providecoverage betweena) Longitude 750

b) Between latitude750 North and Southc) Both a) & b) above

d) None ofthese

76. In ball type erection unit,rotation of holder takes placethrough reduction gear fromgyro rotor shaft, the speed ofholder being__________a) 25 rpm b) 20 rpm

c) 30 rpm d) 35 rpm

77. In torque motor andlevelling switch type of erectionsystem the supply fed to thecentre electrode isa) 25V AC b) 20V AC

c) 12V AC d) 15V AC

78. Fast Erection system issupplied witha) 28V DC b) 115V AC

c) 25V AC d) None

79. Erection rate of normalerection system isa) 50/sec b) 50/min

c) 30/min d) 30/sec

80. Erection rate of fast erectionsystem is


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a) 50/sec b) 50/minc) 30/min d) 30/sec

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