HEAVY AIRCRAFT

1. If excessive fogging is found in a/c cabin, what are its probable cause & remedial action to be taken?

2. Draw the schematic diagram of emergency L/G retraction system by using standby hydraulic power?

3. Draw the schematic diagram of nitrogen charging trolley & name the parts. What is the purpose of pressure reducing valve of regulator valve?

4. Write a note on cutting & drilling plastic material?5. What type of a/c is low thickness aerofoil? Explain with reasons?6. What are the special precautions on AME should take before releasing

the a/c in rainy season?7. How is the L/G warning system tested on ground?8. What is the inspection to be carried out on hose assemblies? What are

the precautions to be taken during installation?9. What are the different materials used one core materials in

composites? Write a few defects in composites which can be classified as minor & a/c released for flight with special precautions?

10.How is the level of fluid in a sock stout checked?11.What is wing body heating system? Explain its operation?12.Write the procedure of fuel transfer from LH wing tank to RH wing

tank?13.Write the construction of wind screen. What is the purpose of heating

it?14.Write a note on Mach trim & speed trim?15.Draw the diagram of shinning damper & explain its working?16.What is the purpose of negative pressure relief valve & safety

pressure valve?

OBJECTIVE QUESTIONS :

1. Static margin is the distance betweena) aerodynamic center & neutral pointb) aerodynamic center & center of gravityc) center of pressure & center of gravityd) neutral point and center of gravity

2. during nidder maintenancea) chord line should be parallel to horizontal

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b) hose over condition is called over balancec) hose down condition is called over balanced) as in a & c

3. Loft does not depend ona) aerofoil designb) amount of using dihedralc) density of air & velocityd) wing surface area

4. Which of the following should also be checked in addition to hard landing inspection items, when the a/c makes hard landing?

a) wing center sectionb) arcing of propellerc) balancing of control surfacesd) none

5. Artificial feel is used ina) aileron control systemb) elevator control system c) rudder systemd) all

6. Which of the following takes the structural loads in the wheel bay?a) keel beamb) transverse beamc) box beamd) all

7. Structural fusea) prevents primary structure damageb) prevents shear loadsc) prevents overflow of current in the circuitd) as in a & c

8. Color coding of ‘O’ rings indicatesa) ageb) tempc) vapor compatibilityd) all

9. The angle of attack where lift/drag ratio is maximum, calleda) dihedral

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b) anhedralc) incidenced) wash in

10. Mark the correct statement a) stall speed with c.g forward movementb) stall speed with backward movementc) stall speed does not change with c.g movement

11.Station 185 indicatesa) 183 mm back of the nose or reference datumb) 183 inch back of the reference datumc) 183 cm back of the nose or reference datumd) 18.30 inch back of the nose or reference datum

12. ‘Out of freezer’ life is associated witha) epoxy resinb) catalystc) prepegd) thermosetting

13. Amount of roll dies not depend ona) Angle of pitchb) Angle of bankc) Angle of turnd) As in a & c

14. Damage of rivets around the head is usually a) greyb) whitec) brownd) as in a & c

15. The a/c is about to land, the fowler flap is extended, it will cause:a) in liftb) in dragc) lift with nose drag movementd) normal

16. When the temperature is more than standard value, the TAS will bea) higherb) lower

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c) first & then remains with effectedd) remains unaffected

17. Strain is measured bya) original length divided by change in lengthb) force by areac) pressure multiplied with change in lengthd) unit distortion of body

18. How selection providesa) 250v ACb) 218 v AC & 121v respectivelyc) 218v, 400 Hz AC d) none

19. Adverse load distribution requiresa) gross weight inspectionb) aft adverse loading checkc) forward adverse loading checkd) all the above

20. Which pressurization system component prevents cabin altitude being more than the a/c altitude?

a) safety relief valveb) negative pressure relief valvec) compressor inlet sentor

21. A solid metallic sound in coin tap test of honeycomb structure indicates:a) core damage b) facing damagec) facing & core damaged) separation of layers in honeycomb constructions

22. Smoke clearance system is used witha) pneumatic systemsb) fire protection systemc) as in b and a pre-set temperature

23. Emergency exit devices located/associated witha) cabin entry doorsb) passenger entry doorsc) cargo entrance

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24. To avoid tip stalling & making the aileron effective for complete flight, wing is provided with was out, wash out means

a) incidence is angle is greater at wing tip than wing rootb) incidence angle is greater at wing root than wing tipc) wing tip is a located ahead when componed to wing root

25. Under inflation is indicated bya) shoulder wear out in the tyreb) more tread wearc) high brake heat

26. Tail skid preventsa) tail section damageb) rotation of a/cc) as in a & c

27. Static discharge damage is identified bya) pits on the surfaceb) wing tips & trailing edges are damagedc) round holes on the surfaced) usually found at wing tips, trailing edges & antennas

28. When proper jigs are not available, the smoothness of center of the a/c wing is measured by

a) applying Vaseline & cellulose paperb) using a thin cord along the leading edge to trailing edge parallel to the

line of flightc) veins a thin cord long the lending edge to trailing edge parallel to the

lateral axisd) both a & b

29. Boundary layer thickness is minimum wherea) airflow gets zero to max velocity changeb) airflow velocity is maximum

30. At high altitudes, presence of foam in hydraulic fluid is caused by a) defective pressurization systemb) no hydraulic fluid in the system c) low pr in the system

31. Purpose of surge tank isa) it protects tank structure damageb) it allows fuel to flow into the tank which is at a laterally lower level

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c) it collects over flowing fueld) as in b & c

32. With in airspeeda) induced drag more than parasite dragb) parasite drag more than induced dragc) induced & parasite drag will be samed) induced & parasite drag will not be affected

33. Surface hardness of steela) with of carbon contentb) only upto a certain point with of carbon contentc) max for wrought irond) depends on the process involved

34. Parts which are cold worked should not be a) weldedb) kept in room with high our tempc) kept in air conditioned room

35. Corrosion on spot welding seam is detected bya) X-rayb) Ultrasonicc) Straight edged) Point peeling off

36. Mark the correct statementa) spoilers are used with ailerons for lateral stability about longitudinal

axisb) flaps & spoilers are auxiliary control surfaces used for lateral stabilityc) all the above

37. Contamination of hydraulic fluid is found bya) viscosityb) flash pointc) moisture contentd) all the above

38. Mark the correct statementa) damage of nose cone does not affect flt of an a/cb) damage to secondary structure like wing tip & nose cone does not

affect the flt of a/c

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c) damage to seat & seat supporting structure affect flightd) none of the above

39. Mark the correct statement regarding reynold’s numbera) if the Rey’s no is high then kinematic velocity is highb) higher the Rey’s No., higher the kinematic viscosityc) higher the Rey’s No, smaller the kinematic viscosityd) higher the Rey’s No. smaller the kinematic viscosity & velocity

40. Vortex generators are aerofoils installed on wing upper surface becausea) laminar flow is more difficult to separate than turbulent flowb) turbulent flow is more difficult to separate than laminar flow

41. Balance panels are operateda) hydraulically b) manuallyc) only in turbulent weatherd) to balance the ailesins

42. Mark the correct statementa) steel & magnesium is used for secondary structural membersb) fiberglass & magnesium is used for secondary structural membersc) Al honey comb & fiberglass honey comb structure is used for

secondary structural memberd) Al is used for a particular type of lead only

43. Mark the correct statementa) if one rivet is tripped, then the adjacent rivets are also tripped in the

same directionb) bearing failure occurs at rivet shankc) shearing failure occurs at rivet hole

44. Turn & slip indicator measurea) the amount of tumb) the rate of tumc) in slip the amount of tum is too lowd) in skid the amount of tum is too high

45. The acceptable deviation in magnetic compass due to local effects the aircraft is

a) 1b) 2

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c) 3d) 5

46. Mark the correct statementa) phosphating on steels prevents corrosionb) chromatizing is done on aluminium as a protective treatment against

corrosionc) cadmium plating on aluminium penetrates into the base metal there by

giving corrosion resistanced) all the above

47. In the operation of VSIa) diaphragm expands in climbingb) diaphragm shrinks in climbingc) diaphragm expands & shrinks in level fltd) both b & c

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IMPORTANT POINTS

1. Fail safe concept – if one members fails other takes the concept

2. Flexible hose installation is secured in 12” inches

3. Permissible elongation to chains in% - 2%

4. Spongy operation of the brakes may be caused by air in the system

5. Grabing of brakesa) wearing the brake linersb) mster cylinder return spregec) brake rod return mechanism may be week

6. Changing direction of controla) pulleys b) fail lead

7. MIL-D-7850 fungeside for cellulose accratic hydraulic the fungiside designated in this specification is

a) copper sulphateb) zinc dimethyl dith carbonate

8. FLT is placed ina) as far as aftb) frontc) as per manufacturers

9. Flap co-efficient of lift 1234a) slotted, fowler, plates, spletb) fowler, slotted, splet, plates

10. Rudder horn materiala) magnesiumb) Al alloy cartc) Al alloy

11. Trikloven cleaning is used ona) titaniumb) titanium alloyc) Al

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d) Al alloy

12. OR compass returns to normal positiona) dead beatb) liquid swinelling

13. Nicad battery spillage is cleaned bya) dilute acetic acid

14. Which marker is used on exhaust drillsa) lead pencil (uncarbondied pencil)b) blue

15. A/c oxygen system should not be service whena) leakageb) contaminated fitting

16. Squeezing brakes – because of brake pads worn out & rivets touching the metal

17. Draging of brakesa) wearing of brake liningsb) master cylinder returns spring weakc) brake return spring is weakd) bubble in the flux

18. Material of 4350 -

19. Material used for the a/c skina) 2024b) 6056c) 9014d) 5056

20. Densily & alectudea) high altitude high density a/c moves fastb) high altitude low density a/c moves fast

21. British manufactured a/c, when L/G retracted & locks what light comes on

a) amberb) no lightc) green

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d) blue

22. In connect acrylic a/c wind shield. After tightening & the screw is loosened by

a) one turnb) half turnc) one & half turnd) two turn

23. After heavy landing, which of the following are motiona) wrinkles on upper surface of the wingb) bent L/G stint

24. A suction gage must be installed in cockpit if the a/c fitted with what type of gage

a) manifold pressure gageb) artificial horizonc) altimeterd) VSI

25. Which type of snow is mostly useda) 2024b) 2014c) 2117

26. Turn & slip indicator works on which axisa) Yaw axisb) Lateral axisc) Longitudinal axis

27. Tab on leading edge is toa) to stall lines position first than outer portionb) to reduce stalling speedc) to reduce angle of lock

28. Rigging is done for the purpose ofa) to respond the control surface properly with lock pit controls

29. Quadrants are used toa) change the direction

30. Load factora) ratio of the wing load to a/c operating weightb) ratio of the wing load to a/c empty weight

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31. which is most easily & widely useda) control cableb) push pull rodsc) control rods

32. If cable is to deflect 3a) fan leads are usedb) pressure seals

33. What control system is used in the operation of pull a) Drum

34. Direct conal stabilitya) dorsal fin is usedb) wingsc) dihedral

35. In V.S.Ia) capsule has an accurately measured holeb) capsule is encapsulated in or causec) pressure lagsd) b & c are correct

36. Drag created other than on lifting surfacesa) induced dragb) profile dragc) parasite & induced

37. As the C.G moves forwarda) max load on nose landing gear

38. On wing skin is sinoted toa) sparsb) -c) ribsd) all the above

39. Tapered wing

40. Fall safea) complex structure one member falls other member takes the load

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41. Welding neutral flame is used ona) steelb) Alc) Magnesium

42. Para static tube installationa) where turbulent air lessb) wing edgesc) front of the a/cd) a & c are correct

43. Acrylic wind shield cracka) radial crack

44. In which actuator spring chamber is useda) single actingb) double actingc) 3 way actuated) b & c are correct

45. Paint on a swaged joint is to disclosea) loosening of cable

46. – failure of wooden structure

47. The members used across longeronsa) stringersb) bulk heads

48. Fretting corrosion on bolted joints on Ala) blackb) whitec) brownd) green

49. Galvanic corrosion ona) piano hinges

50. Dope thicknessa) thickness of the lopeb) No of coats of lope

51. Pitot testing the pressure is applied and leak should not be more than

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52. What is the free air temp in respect to a/c instrumenta) air temp over the wingb) air flowing around the fluidc) air which is compressed just before the a/cd) air just before reaches the a/c

HEAVY AIRCRAFT( FEB-2002)

1. a) What are the emergency/alternative L/G lowering systems? Explain the agency hydraulic system with diagram.b) What are the gauges & indication used for proper operation of a/c fuel system?c) What are the advantages & disadvantages of liquid O2 system in a/c? how is O2 bottle identified in a/c?

2. a) What are the inspections to be carried out on a/c pulley?b) Explain the performance of out servo airfoil with the neat diagram of its characteristic curve.c) What are the advantages of auto brake system? What are the components of the system? Draw its diagram.

3. a) What are the inspection carried out on control cables?b) What are the advantages of swept back wings?c) What is the purpose of safety relief valve in a/c pressurization system?d) Which are the types of recovers used in a/c hydraulic system?

4. a) Write stepwise repair of the damaged skin where the core of the honey comb material has also been damaged?b) What is the safety features incorporated in air conditioning system of the a/c?c) Explain the smoke detection system used in cargo compartment. Describe with a neat diagram?

5. a) How will you detect leak in internal fuel system?b) What is mach trim system & how it functions?c) What are the precautions taken before operating flap system?d) What safety features are incorporated in a/c flap system?

6. a) Where external leaks are found in hydraulic system & here they are rectified?b) How stall warning is fold in the cockpit?

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c) What is ‘Q’ feed in a/c control system? How is it sensed? What are the used of ‘Q’ feel in a/c?

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MCQ

1. Composite with high compressive strength - boron2. L/G lateral load taken by – Side strut3. Before fuel tank welding – purge with steam4. Composite for core – PVC & urathene5. ‘Flag Out’ goes out of view – when PWR is out6. Primary structures – Frame & longeron7. Wing heating due to engine location – will accelerate transition8. Flap over load valve – Retract flaps to prevent damage.9. Velocity increases – induced drag decreases10. L/G down causes – parasite drag11. Principle of AOA indicting system – not parallel to the true AOA of a/c12. Definition – wing bitt line13. Roof skin thickness is – less14. Stressed skin metal sing subjected to velocity – a group of rivet lead dipping15. Damage on wing tip & radame – will not affect a/c safety16. Static pr line disconnected inside pressurized cabin – ASI & altimeter read low17. L/G down enabling by orifice check valve18. Brake creeping – contamination of brake linings / glazing19. To check shock strut fluid level – release air & remove valve20. Cricket bull seam, rough surface – high Reynolds number, lift 21. T/Reverser principle – Newton’s law22. Fast erection of gyro hampered by –23. At the time of installation accelerometer should read + 1G24. Wind shield made of thermosetting plastic25. L.E flap made of – Al casting26. Intergranular corrosion – grain boundaries27. Sherordizing process – Dipped in molten Zn28. In a/c, air enter – reheater to turbine29. Gyros – terrain clearance30. Spoiler – Assist in roll control31. Remissible deviation in magnetic compass32. Compass caliberation, coefficient A is33. Compass compensation – divide by 834. If O2 system pr kept law – moisture accumulating35. Smoke clearance is part of – A/c system36. If peak temp goes high – temp control valve modulate close37. Purpose of fuel tank venting – to prevent damage, collapse suction38. A stripe mark rim to side wall of tyre. Slippage (creep) identification39. Annealing makes st. steel – removal stresses, soft machinative

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40. Gear type hyd pump is +ve displacement pump because – transfers uniform rol of fluid in each turn41. Resistance type temp indicator used – wheel stone bridge circuit42. Shear between layer takes place – within boundary layer43. A/C nose tip – stagnation pt, highest pr44. Plain flap on deflection - effective AOA

1. What are the hydraulic rivets pressurized upward?2. What are the GPWS operation modes?3. What are some of the l/p & o/p of Air Data Computer (ADC)?4. What will happen when a metal strip comes under L/G?5. How does a flap asymmetry system work?6. How is the L/G selected up & down?7. Explain the purpose & principle of operation of a shimmy damper?8. How the tyres will be removed if both the tyres of one side are worm out?9. Explain the process of jacking are side main L/G?10. How the shock strut lower pt is rigged?

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HEAVY AIRCRAFT(OCT 2000)

1. Air conditioning distribution system for modem a/c?2. a) Yaw damper b) Flap overload3. a) Induced drag b) Dynamic stability4. Hydraulic steering system with a neat sketch.5. Types of fire & smoke detector & explain phart electric cells with a sketch?6. Explain the operating principles of dilutes demand regulator?7. Tyre burst incident insp?8. a) Fuel vent system b) Fuel leak classification9. a) During normal operation what are the corrosion under which hydraulic low quantity indication occur?b) What is the purpose of L/G transit cylinder & when it comes to operation?10. Name the instrument which works in gyro & explain any one of them with principle & operation?

HEAVY AIRCRAFT(OCT 2001)

1. What is dihedral angle & how its affects the a/c stability?2. How is operational check of L/G warning s/w carried out?3. What are the pressurization modes in a modern a/c? How is manual control carried out?4. Write the names of the eqpa/system which receive Air baler computer o/p?5. When are operational checks of Antiskid system carried out?6. What is the function of coalscent lag in air conditioning system?7. What is the manual reversal of flt control? Explain with an example?8. With a neat diagram explain the cabin temp regulation system?9. With a figure write the purpose of an adjustable tab?10. What is the purpose of a sequence valve in hydraulically operated L/G system?11. What is wing loading & how it diffects the landing speed of an a/c?12. How is air vent provided to the fuel tank? Give a diagram of vent in modem a/c fuel tanks?13. Why are hydraulic reservoirs pressurized & what are the sources for its presurisation?

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14. What are the precaution taken while working on oxygen system?15. What are the anti icing processes applied on modem a/c?16. What are the safely features involved in design of a horizontal stabilizer of a modem a/c?17. Why is surface coating applied on a re-in forced fabric component?18. How is delamination check carried out on a honey comb material used in a/c construction?

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