19 Apr 2014

DGCA Light Aircraft, Paper-3, Feb 2013, Que Paper.(ALL 100 Que.)


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LA FEB 2013 

1. Composites bears
a. Tensile stress
b. Shear Stress
c. Bearing Stress

2. Cap strip
a. Top & bottom of rib.
b. Diagonal member b/n upper & lower end.

3. The marking on the heads of the Dzus Fastener is identified by-
Ans. Body dia, length, head type.

4. Mostly used in control system where deflection throudh structure is required-
Ans. Cable system.

5. Threaded rivets(rivnuts) are used to joint
a. Two or more sheet metals where shear stress is desired.
b. Attach parts or components with screw to sheet metals.
c. Two or more piece of sheet metal where bear stress is desired.

6. Non heat treatable alloy
Ans. 5056

7. 2014-T rivet
a. Primary Structure
b. Secondary
c. Generally not used in aircraft structure.

8. D in screw indicates
A. Head drilled for safetying
B. 2017 Al. Alloy

9. An A/C integral fuel tank is
a. A part of A/C structure
b. Removable part

10. Composite material
a. Low tensile strength
b. Low thermal expansion/ Cofficient

11. Fungicidal dopes are used in aircraft furnishing as the
Ans. First coat to prevent to rotting & are extremely applied thin to saturate the fabric.

12. Sags in A/C finishes
a. Too much coat applies
b. Low atmp. Humidity

13. Rivet Joint subjected to
a. Compressive load
b. Shear load
c. Tensile load
d. b & c

14. Toe in & Toe out related with
Ans. Wheel Alignment

15. Decreasing Angle of incidence from root to tip called
a. Washed In Aviation World

b. Washed Out
16. In monocoque construction Longeron has cross bracing members which have longitudinal strip is
called
a. Bulkhead
b. Stringer
c. Frames (Former)
d. a & c

17. Rivet Specing
Ans. Distance between center of rivet hole to other rivet hole.

18. Monocoque fuselage
a. Do not use former and stringer
b. Economic & good for low stress aircraft.

19. Diagram of split flap

20. Question about corrosion
a. Surface
b. Intergranular c. ……. D. As in b & Fretting corrosion

21. When landing gear retracted which drag reduced
Ans. Parasite Drag

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22. Fatigue Crack occurs during process of Al. Alloy
Ans. Improper heat treatment

23. Field Rivet
a. 2117 T
b. 2024 T
c. 2017 T

24. Flame used for welding Al. Alloy
A. Carburizing
B. Neutral
C. Oxidizing

25. Adequate protection of fabric depends upon
Ans. Thickness of dope film

26. Nose heavy tendency
Ans. CG forward of CP

27. Pitching increases
Ans. Longitudinal instability

28. Stall strip location
Ans. Inboard of wing & forward

29. Which procedure must be followed when defueling A/C with swept back wings?
a. Defuel all tanks at 1st time.
b. Defuel outboard wing tank 1st.
c. Defuel inboard wing tank 1st.

30. Hydrometer reading at tenmp. 22 C, correction reading 28. Hydrometer reading 1.250.
a. 1.222 b. 12.22 c. 1.278

31. What type of selector valve is one of the most commonly usd in hydraulic syatem to ;provide for
simultaneous flow of fluid into & out of connected actuating unit.
Ans. Four port closed center V/v Aviation World


32. Stability about the axis which runs parallel to line of flight
a. Lateral
b. Longitudinal
c. Dihedral

33. Aerodynamic balancing is done on control surface
a. Adding wt. at hinge line of trailing edge b. Adding wt. aft hinge line of trailing edge.

34. Balancing of control surface
a. Buffeting b. c. wt/strength ratio

35. Correct dihedral angle can be determined by
Ans. Using dihedral board & bubble level along the front spar of each wing

36. Purpose of stall strip Is
Ans. Stall inboard portion/ root area first

37. What is the purpose of compensating port or valve in brake master cylinder of independent
brake system
a. Assist in master cylinder piston return.
b. Prevent fluid from flowing back to reservoir
c. Permit the fluid to flow forward or away from reservoir as temp. changes

38. Fuselage station
Ans. Body station.

39. Breakdown of air occurs by
a. Plain flap
b. Split flap
c. Fowler flap

40. Dutch roll definition
Ans. Coz of dihedral of wing.

41. Trim tab cable
a. 7x 19
b. 7x6
c. 7x7
d. 7x19 + extraflexible

42. If PDR reports that aeroplane will be heavy on controls then
Ans. Cable rigged tightly.

43. The metring pin in oleo shock strur serves to
a. Lock the strut in down position
b. Retard the flow of oil as the struts are compressed
c. Meter the amount of air in strut.

44. Nose wheel landing gear is provided with centering cam which center the wheel while
Ans. Retraction

45. Cg placed to ahead
a. Nose wheel vibrates
b. Excessive load on nose wheel
c. all

46. Primary purpose of wheel balancing
Ans. Prevent heavy spots & reduce vibration.
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47. Torque link
Ans. Correct wheel alignment

48. Autocollision light
a. Less than 40 & 100 min/cycle
b. Less than 45 & 120 min/ cycle

49. Navigation Light
a. Red left & right green & 140 Angle
b. 2 lights on wing 1 rear
c. White-rear
d. all

50. Petroleum base hydraulic fluid is which colour
Ans. Dyed Red,.

51. Excessive wear at center
Ans. Overinflation

52. An A/C magnatic compass is swing to update the compass correction card when
a. Annual inspection accomplished on aircraft
b. The compass is serviced
c. Equipment is added that could effect compass deviation
d. All

53. Which instruments have range marking
a. ASI
b. CHT
c. Both
d. Altimeter

54. What must be done to an instrument panel that is supported by shock mounts
Ans. Banding straps must be installed across the instrument mount as current path.

55. Which marking colour is used to indicate if a cover glass has slipped
Ans. White

56. What component of an autopilot system applies torque to control surface of an A/C
a. Servo
b. Controller
c. Gyro

57. Pitot tube
a. At longitudinal axis & far forward as possible
b. Where vibration exist
c. All

58. Static discharge damage
Ans. Its local burning & pitting along trailing edge of wing

59. What is the recommended procedure for cleaning the fuel tank before welding
a. Steam clean the tanlk interior
b. Purge tank with gas
c. Flush the inside of tank with clear N2O.

60. How does Temp. affect fuel weight?
a. Cold fuel heavier/ gallon.
b. Warm fuel is havier/ gallon
c. Temp has no effect.
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61. To prevent vapour lock in fuel lines at high altitude some aircraft are equipped with
a. Vapour separator
b. Direct injection type carburetor
c. Booster pump

62. If a bladder type fuel tank is to be left empty for a extended period of time then the inside of
tank should be coated with film of
a. Engine oil
b. Linseed oil
c. Fuel

63. Bonding
Ans. Bonding with aircraft structure.

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64. What controls the inflation sequence into pneumatic deicer boots
a. Distributer V/v
b. Shutter V/v
c. Vaccum pump

65. What is the source of pressure for inflating deicer boots on reciprocating engine
a. Vane type pump
b. Piston type
c. Gear type

66. What method is usually employed to control the temp of an antiicing system using surface com
b heaters
a. Thermo cyclic switch
b. Thermo states in the cockpit
c. Heater fuel shutoff v/v

67. Which of the following regulates the vaccum supplied by air pump to hold the deicing boots
deflated when the pneumatic deicing system is off?
a. Distributer V/v
b. Pressure regulator
c. Suction relief valve

68. Why should a chemical rain repellent not be used on dry windshield
a. It will eitch glass
b. Restrict visibility
c. Glass crazing
d. All

69. Trim tab uses
Ans. Cable drum
70. MTCS
Ans. Altituded decreases & a/c moves forward.

71. Relief holes is provided at the intersection of center
Ans. No allow crack to propogate & to reduce stress concentration.

72. Hard landing can be detected by
a. Wrinkled wing
b. Bended strut
c. Leak near revealed seam
d. All.

73. Suction gauge is used in
Ans Artificial Horizon

74. MTCS
a. Override stops are Aviation World
b. Primary stops in cockpit only . All.

75. Vortex generator prevents
Ans. Wing tip stalls

76. After brake bleeding, the serviceability is checked
a. Brake should be applied both sided equally
b. Operation check done while taxing
c. Wheel should rotate fully & freely when brake is not applied d. All

77. Tapered bolt installed in Al panel is subjected to stress,hole is inlarged,stress occoures

Ans. Compression.
78. Composite material used on many secondary structure in flight control surface
Ans. Fiber Glass

79. Defect Shake in wood is long crake
Ans, Running between 2 Annular rings

80. MTCS
Ans. Heavy portion of tyre.

81. Fail safe concept
Ans. In which failure of one member, another member assemble its load.

82. MTCS about propeller torque
a. Never follow engine torque
b. Always oppose engine torque
c. Propeller torque assist during windmilling

83. Dye penetrant used in
a. Ferrous b. Non Ferrous c. Non porous plastic d. All

84. Doorsoles made of
Ans. Fiberglass & Bakelite

85. Wing loading definition
Ans. Dividing its total wing platform area into maxi. Allowable gross weight.

86. Forward force
Ans antidrag wire
 

87. Blushing may be caused by
Ans. Temp. too low, humidity high, drafts over freely dopped surface, use of acetone as a thinner

88. Purpose of wing slat
Ans. Reduce stall speed at higher angle of attack

89. Which of the following provides manual maneuverability of aircraft while the autopilot is
engaged?
a. Servo amplifier
b. Directional gyro
c. Flight controller

90. Stall warning system are designed to being warning the pilot when a stall
Ans. Is imminent

91. Arcing in an electrically heated windshield panel usually indicates a breakdown in Aviation World
Ans. Conductive Coating

92. Fine cracks on acrylic sheet are
Ans Crazing

93. Painted band placed on cable adjacent to cable terminal is to denote
Ans. Slippage of cable into fitting

94. Pilot reports PDR A/c has tendency to yaw
Ans. Offset the rudder fin.

95. Limiting factor of aspect ratio
Ans. Drag

96. When A/c load to more forward
A. It will load more forward on nose L/G
B. It will affect A/C stability
C. It will cause dangerous spin.
D. All

97. Static Pressure is applied to
Ans. Static leak test

98. MTCS about Battery

99. MTCS about installation of Battery
a. Prior to installation checks done like proper venting etc.
b. When NI-Cd battery used in place of Ld-Acid battery then firstlu clean acid with……. D. All

100. Purpose of Debooster valve is to
Ans. Release pressure & release brake

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