19 Apr 2014

DGCA Light Aircraft, Paper-3, Feb 2012, Que Paper.(full que paper 81que.)


1.MTCS
a. a/c principal units are fuselage, wing
b. a/c structural members are longerons, stringers
c. cowlings & fairing are not reqd. to carry landing loads or stress imposed by flight.
d. all

2. MTCS
a. stress is an internal force of a substance which opposes or resists deformation.
b. strain is the deformation of material or substance.
c .stress, the internal force, can cause strain.
d. all

3 .which of the following force engine pulls the a/c forward, but air resistance tries to hold it back
a .tension
b. shear
 c. Compression
d .both a &b

4. which of the following stress that resists the force tending to cause one layer of a materialto slide over an adjacent
a. shear b. tension c. compression d. both b & c

5. which of the following stress that subject to a/c parts such as screws, bolts, & rivets
a. tension b. compression c. shear d. both b & c

6. Bending stress combination of
a. compression b. tension c. both a & b

7. Which types of fuselage construction is usually constructed of steel tubing welded togetherin such way can carry both tension & compression
a. truss
b. Semi monocoque
c. Monocoque
d. none

8. In semi monocoque type fuselage primary bending loads are taken by
a.longerons
b. stringer
c. bulkhead
d. both a & b

9. In semi monocoque fuselage, the vertical structural members are
a. longeron & stringer
b.bulkhead, frames, & former
c. both
d. none

10. Which prevent tension & compression from bending the fuselage?
a. bulkhead & stringers
b. longeron & stringers
c. both a& b
d. none

11. MTCS
a. longerons is made of carbon steel
b. stringers is made of titanium
c. both longerons & stringers are made of aluminium alloy
d. both longerons & stringers are made of carbon steel

12. MTCS
a. gussets is a type of connecting bracket
b. the bracing b/w longerons is often called as web member
c. they may be installed vertical or diagonally
d. all

13. MTCS blueprints reads
a.“fuselage frame station 137,” that particular f rame station can be located 137 in. behindthe nose of the a/c
b. fuselage frame station 137, that particular frame station can be located 137 cm behind thenose of the a/c.
c. ‘fuselage frame station 137’, that particular frame station can be located 137 in. behind thezero station of the a/c
d. “fuselage frame station 137”, that frame station can be located 137cm behind the zerostation of the a/c

14. Which of the station is measurement of height in inches perpendicular from a horizontalplane located a fixed no. of inches below the bottom of the a/c fuselage
a.water line
b. fuselage station
c. butt line
d. buttock line

15. MTCS
a. stringers running span wise
b. Ribs running chord wise
c. spars are principal units
d.all

16. During flight, applied loads which are imposed on the wing structure are primarily on
a. skin
b. ribs
c. formers
d. all

17.Wing.stubs, in which arrangements, is an integral part of the
a. wings
b.fuselage
c. fuselage in centre section
d. none

18. Failsafe means
a. if one member of complex structure fail, some other member would assume the load of thefailed member

19. Wing butt ribs may be called
a. bulkhead rib
 b. to received compression loads
c. both

20. Advantage of box beam wings
a. increase strength
b .reduce weight
 c. it also serve as a fuel tank when properlysealed
d. all

21. Bulkhead made of
a. aluminium alloy
 b. cast aluminium alloy
c. titanium
 d. carbon steel

22. Engine mounts are made of
a. chrome
b. chrome /molybdenum steel tubing
c. aluminium
d.all

23. An aircraft requires a longer runway for t/o on
a.damp days
b. dry days
c. rainy days
 d. all

24. Air has no _________, except pressure, unless it is in motion
a. force
 b. power
c. all

25. The flow of air around an object caused by the movement of either the air or the object,or both, is called
a. relative wind
 b. in relative wind
c. air around wind

26. Lift can be increased by
a. angle of attack
b. shape of the airfoil
c. free stream velocity
d. all

27. The point of intersection of the resultant force line with the chord line of the airfoil iscalled
a. centre of pressure
b. centre of gravity
c. lift
d. all

28. MTCS
a. When the angle of attack increases to the angle of maximum lift, the burble point is reachedis called critical angle.
b. pressure increases as c.p. increases
c. velocity increases as c.p. increases
 d. all

29. Angle of incidence is _______ when leading edge is lower than trailing edge of wing.
a. negative
b. positive
c. inward
d. outward

30. The shape of airfoil determines the
a. amount of turbulence
b. skin friction
c. also affects the efficiency of wing
d. all


31. Efficiency of wing is measured in terms of
 a. L/D
b. L/W
c. D/W
d. W/G

32. MTCS
a. an a/c must have sufficient stability to maintain a uniform flight path
b. recover from the various upsetting forces
c. a/c must have the proper response to the movement of the controls d. all

33. as air flows over the upper surface of an airfoil then
a. velocity decreases , pressure increases
b. velocity increases , pressure increases
c. velocity decreases, pressure decreases
d.velocity increases, pressure decreases


34. Air flows under the surface of an airfoil then
a. velocity increases pressure increases
b. velocity increases , pressure decreases
c. velocity decreases, pressure decreases
d.velocity decreases pressure increases

35. Three-fourths of the total lift of airfoil over the upper surface is result of
a. pressure increases velocity increases
 b. pressure increases velocity decreases
c. pressure decreases velocity decreases
d. pressure decreases velocity increases

36. Which primary surface controls the longitudinal stability
a. aileron
b. horizontal stabiliser
 c. flap
d. all

37. Directional stability is aided by using
a. sweptback wings
b. large dorsal fin
 c. long fuselage
d. all

38. Included in secondary group of flight control surface are
a. trim tab
b. flaps
c. leading edge flap
 d. all

39. Included in auxiliary group of flight control surface is
a. leading edge flap
b. spoiler
c. wing flap
d. all

40. Which tab is aid in moving a primary control surface is
a. trim tab
b. spring tab
c. balance tab
d. none


Ques From- 9A

41. Aircraft control cables are fabricated from
 a.carbon steel
b. stainless steel
 c. both
d. none

42. The 7x7 cable consists of
a. seven wires move around each strands
b. seven strands of six wires one in centre
c.seven strands of seven wires each
d. none

43. Which cable is used for trim tab control, engine control, & indicator controls
a.7x7
b. 7x19
c. 7x9
d. 1x7

44. The colour codes on O-rings that are compatible with red for
a. hydraulic fluid
b.fuel
c. oil
d. none

45. MTCS
a. backup rings are not colour coded
 b. V-rings are always installed with the open end of the “V” facings the pressure
c. The U-rings will seal pressure in one direction
 d. all

46. Two parts sealants means
a. separate packaging to prevent cure prior to application
b.
c.
d. none

47. MTCS
a. Metal corrosion is deterioration of the metal by chemical orelectrochemical attack
b. on aluminium alloys the corrosion forms a greenish film
c. on copper alloys it appears as surface pitting
d. all

48. Damaging form of corrosive attack which occurs when two mating part, normally at restw.r.t. one another, are subject to relative motion
a. surface corrosion
b. stress corrosion
c.fretting corrosion
d. none

49. Factors affecting corrosion
a. climate
 b. shape & type of metal
c. foreign material
d.all

50. To improve the corrosion resistance of a/c
a. improvement in materials
b. surface treatment, insulation
c. protective finishes
d.all

52. Which treatment is required for all aluminium alloys & non-clad aluminium alloy surface?
a. Parco lubrizing
b. anodizing
c.alodizing
d. none

53. Factors which determine the requirements in repair of steel a/c metals
a. strength
b. resistance to deterioration
 c. durability
 d.all


54. A numerical index, sponsored by SAE which means
a. Society of Automotive Engineers
b. society of automatic establishment
c.
 d. none5

5. The most common forms heat treatment of ferrous metals are
a. annealing
b. tempering
c. casehardening
 d. all

56. However, there is only one nonferrous metal that can be casehardened, & none can betempered or normalized
a. aluminium
 b. magnesium
c. titanium
d. none

57. Solution heat treatment applicable for
 a. only ferrous metal
b. Non-ferrous metal
c. both
d. all

58. Most steels can be nitride, special alloys contain
a. aluminium
b. magnesium
c. titanium
d. none

59. Which of the hardness tester measures the resistance of penetration
a. Rockwell tester
b. Brinell tester
c. Barcol tester
d. none



ques.From-15A

60. Calendaring is used in
a.fabric
b. painting
c. doping
d. primer

61. Reinforcing tape is used
a. over ribs between the fabric covering
b. ribs stitching to prevent stitching chord fromcutting through the fabric
c. binding
d.all

62. Which of following can be used for testing scratches on aluminium surface pane
a. caustic soda solution
b. sulphuric acid
c. water
d. none

63. Most common defects on fabric
a. delamination
b.mildew
c. oil canning
d.all

64. MTCS bonded honeycomb structure
c. Aluminium core material are usually used to replaced the damaged fabric cores of bondedhoneycomb structure
d. none

65. Dry rot defects found in
a. fabric
b.wood structure
c. paint
d. none


66. Which type of glue widely used in a/c repair works
a. Casein
b. resin
c. rosin
d. both b& c

67. which type of plastic used in a/c windows, doors, canopies
a.thermoplastic
b. thermosetting
c. protein plastic
d. both a& b

68. The welded joint offers
a. rigidity
 b. simplicity
c. low weight
d. all

69. Which of the following arc welding processes most widely used in a/c construction
a. multi arc welding
b. metallic arc welding
c. inert-gas welding
d. both b& c

70. Which type of electric resistance welding is used in a/f construction
a. spot welding
b. seam welding
c. butt welding
d. none

71. MTCS
a. acetylene cylinder is usually checked in every six months.
b. oxygen cylinder is usually checked in every six months.
c. Beeswax is commonly used lubricant for oxygen equipment& fittings

d. all

72. Which method is used in welding most of the lighter tubing & sheet metals
a. forehand
b.backhand
c. both
d. none

73. An oxidizing flame contains an excess of
a. acetylene
b.oxygen
c. both

74. Expansion & contraction of metal can be controlled by
a. during welding place the metal in air conditioning room
b. tack welding
c.
d. all

75. Which of the following type of flame is used for stainless steel
a. oxidizing flame
 b. carburizing flame
c. neutral flame
d. none

76. Chemical stability means
a.liquid’s ability to resists oxidation &deterioration for long period
b. excessive temp. have great effect on life of a liquid

78. Which type of seals is used with petroleum base hydraulic fluids
a. natural rubber
b.synthetic rubber
c. butyl rubber
d. none


79. If pump becomes unusually hard to turn or jammed, this caused due to
a. section will shear, preventing damage to the pump or driving unit
b. failure in pump drive shaft couplings
 c. all

80. Function of accumulator is to
a. dampen pressure surges in the hydraulic system
b. aid or supplement the power pump when several units are operating at once
c. store power for the limited operation of a hydraulic unit when the pump is not operating
d. All

81. Which composites are used to fabricate ribs and stringers (from-composite)
a. Carbon /Graphite
b. Boron
c. Ceramic
d. none1.MTCS
a. a/c principal units are fuselage, wing
b. a/c structural members are longerons, stringers
c. cowlings & fairing are not reqd. to carry landing loads or stress imposed by flight.
d. all

2. MTCS
a. stress is an internal force of a substance which opposes or resists deformation.
b. strain is the deformation of material or substance.
c .stress, the internal force, can cause strain.
d. all

3 .which of the following force engine pulls the a/c forward, but air resistance tries to hold it back
a .tension
b. shear
 c. Compression
d .both a &b

4. which of the following stress that resists the force tending to cause one layer of a materialto slide over an adjacent
a. shear b. tension c. compression d. both b & c

5. which of the following stress that subject to a/c parts such as screws, bolts, & rivets
a. tension b. compression c. shear d. both b & c

6. Bending stress combination of
a. compression b. tension c. both a & b

7. Which types of fuselage construction is usually constructed of steel tubing welded togetherin such way can carry both tension & compression
a. truss
b. Semi monocoque
c. Monocoque
d. none

8. In semi monocoque type fuselage primary bending loads are taken by
a.longerons
b. stringer
c. bulkhead
d. both a & b

9. In semi monocoque fuselage, the vertical structural members are
a. longeron & stringer
b.bulkhead, frames, & former
c. both
d. none

10. Which prevent tension & compression from bending the fuselage?
a. bulkhead & stringers
b. longeron & stringers
c. both a& b
d. none

11. MTCS
a. longerons is made of carbon steel
b. stringers is made of titanium
c. both longerons & stringers are made of aluminium alloy
d. both longerons & stringers are made of carbon steel

12. MTCS
a. gussets is a type of connecting bracket
b. the bracing b/w longerons is often called as web member
c. they may be installed vertical or diagonally
d. all

13. MTCS blueprints reads
a.“fuselage frame station 137,” that particular f rame station can be located 137 in. behindthe nose of the a/c
b. fuselage frame station 137, that particular frame station can be located 137 cm behind thenose of the a/c.
c. ‘fuselage frame station 137’, that particular frame station can be located 137 in. behind thezero station of the a/c
d. “fuselage frame station 137”, that frame station can be located 137cm behind the zerostation of the a/c

14. Which of the station is measurement of height in inches perpendicular from a horizontalplane located a fixed no. of inches below the bottom of the a/c fuselage
a.water line
b. fuselage station
c. butt line
d. buttock line

15. MTCS
a. stringers running span wise
b. Ribs running chord wise
c. spars are principal units
d.all

16. During flight, applied loads which are imposed on the wing structure are primarily on
a. skin
b. ribs
c. formers
d. all

17.Wing.stubs, in which arrangements, is an integral part of the
a. wings
b.fuselage
c. fuselage in centre section
d. none

18. Failsafe means
a. if one member of complex structure fail, some other member would assume the load of thefailed member

19. Wing butt ribs may be called
a. bulkhead rib
 b. to received compression loads
c. both

20. Advantage of box beam wings
a. increase strength
b .reduce weight
 c. it also serve as a fuel tank when properlysealed
d. all

21. Bulkhead made of
a. aluminium alloy
 b. cast aluminium alloy
c. titanium
 d. carbon steel

22. Engine mounts are made of
a. chrome
b. chrome /molybdenum steel tubing
c. aluminium
d.all

23. An aircraft requires a longer runway for t/o on
a.damp days
b. dry days
c. rainy days
 d. all

24. Air has no _________, except pressure, unless it is in motion
a. force
 b. power
c. all

25. The flow of air around an object caused by the movement of either the air or the object,or both, is called
a. relative wind
 b. in relative wind
c. air around wind

26. Lift can be increased by
a. angle of attack
b. shape of the airfoil
c. free stream velocity
d. all

27. The point of intersection of the resultant force line with the chord line of the airfoil iscalled
a. centre of pressure
b. centre of gravity
c. lift
d. all

28. MTCS
a. When the angle of attack increases to the angle of maximum lift, the burble point is reachedis called critical angle.
b. pressure increases as c.p. increases
c. velocity increases as c.p. increases
 d. all

29. Angle of incidence is _______ when leading edge is lower than trailing edge of wing.
a. negative
b. positive
c. inward
d. outward

30. The shape of airfoil determines the
a. amount of turbulence
b. skin friction
c. also affects the efficiency of wing
d. all


31. Efficiency of wing is measured in terms of
 a. L/D
b. L/W
c. D/W
d. W/G

32. MTCS
a. an a/c must have sufficient stability to maintain a uniform flight path
b. recover from the various upsetting forces
c. a/c must have the proper response to the movement of the controls d. all

33. as air flows over the upper surface of an airfoil then
a. velocity decreases , pressure increases
b. velocity increases , pressure increases
c. velocity decreases, pressure decreases
d.velocity increases, pressure decreases


34. Air flows under the surface of an airfoil then
a. velocity increases pressure increases
b. velocity increases , pressure decreases
c. velocity decreases, pressure decreases
d.velocity decreases pressure increases

35. Three-fourths of the total lift of airfoil over the upper surface is result of
a. pressure increases velocity increases
 b. pressure increases velocity decreases
c. pressure decreases velocity decreases
d. pressure decreases velocity increases

36. Which primary surface controls the longitudinal stability
a. aileron
b. horizontal stabiliser
 c. flap
d. all

37. Directional stability is aided by using
a. sweptback wings
b. large dorsal fin
 c. long fuselage
d. all

38. Included in secondary group of flight control surface are
a. trim tab
b. flaps
c. leading edge flap
 d. all

39. Included in auxiliary group of flight control surface is
a. leading edge flap
b. spoiler
c. wing flap
d. all

40. Which tab is aid in moving a primary control surface is
a. trim tab
b. spring tab
c. balance tab
d. none


Ques From- 9A

41. Aircraft control cables are fabricated from
 a.carbon steel
b. stainless steel
 c. both
d. none

42. The 7x7 cable consists of
a. seven wires move around each strands
b. seven strands of six wires one in centre
c.seven strands of seven wires each
d. none

43. Which cable is used for trim tab control, engine control, & indicator controls
a.7x7
b. 7x19
c. 7x9
d. 1x7

44. The colour codes on O-rings that are compatible with red for
a. hydraulic fluid
b.fuel
c. oil
d. none

45. MTCS
a. backup rings are not colour coded
 b. V-rings are always installed with the open end of the “V” facings the pressure
c. The U-rings will seal pressure in one direction
 d. all

46. Two parts sealants means
a. separate packaging to prevent cure prior to application
b.
c.
d. none

47. MTCS
a. Metal corrosion is deterioration of the metal by chemical orelectrochemical attack
b. on aluminium alloys the corrosion forms a greenish film
c. on copper alloys it appears as surface pitting
d. all

48. Damaging form of corrosive attack which occurs when two mating part, normally at restw.r.t. one another, are subject to relative motion
a. surface corrosion
b. stress corrosion
c.fretting corrosion
d. none

49. Factors affecting corrosion
a. climate
 b. shape & type of metal
c. foreign material
d.all

50. To improve the corrosion resistance of a/c
a. improvement in materials
b. surface treatment, insulation
c. protective finishes
d.all

52. Which treatment is required for all aluminium alloys & non-clad aluminium alloy surface?
a. Parco lubrizing
b. anodizing
c.alodizing
d. none

53. Factors which determine the requirements in repair of steel a/c metals
a. strength
b. resistance to deterioration
 c. durability
 d.all


54. A numerical index, sponsored by SAE which means
a. Society of Automotive Engineers
b. society of automatic establishment
c.
 d. none5

5. The most common forms heat treatment of ferrous metals are
a. annealing
b. tempering
c. casehardening
 d. all

56. However, there is only one nonferrous metal that can be casehardened, & none can betempered or normalized
a. aluminium
 b. magnesium
c. titanium
d. none

57. Solution heat treatment applicable for
 a. only ferrous metal
b. Non-ferrous metal
c. both
d. all

58. Most steels can be nitride, special alloys contain
a. aluminium
b. magnesium
c. titanium
d. none

59. Which of the hardness tester measures the resistance of penetration
a. Rockwell tester
b. Brinell tester
c. Barcol tester
d. none



ques.From-15A

60. Calendaring is used in
a.fabric
b. painting
c. doping
d. primer

61. Reinforcing tape is used
a. over ribs between the fabric covering
b. ribs stitching to prevent stitching chord fromcutting through the fabric
c. binding
d.all

62. Which of following can be used for testing scratches on aluminium surface pane
a. caustic soda solution
b. sulphuric acid
c. water
d. none

63. Most common defects on fabric
a. delamination
b.mildew
c. oil canning
d.all

64. MTCS bonded honeycomb structure
c. Aluminium core material are usually used to replaced the damaged fabric cores of bondedhoneycomb structure
d. none

65. Dry rot defects found in
a. fabric
b.wood structure
c. paint
d. none


66. Which type of glue widely used in a/c repair works
a. Casein
b. resin
c. rosin
d. both b& c

67. which type of plastic used in a/c windows, doors, canopies
a.thermoplastic
b. thermosetting
c. protein plastic
d. both a& b

68. The welded joint offers
a. rigidity
 b. simplicity
c. low weight
d. all

69. Which of the following arc welding processes most widely used in a/c construction
a. multi arc welding
b. metallic arc welding
c. inert-gas welding
d. both b& c

70. Which type of electric resistance welding is used in a/f construction
a. spot welding
b. seam welding
c. butt welding
d. none

71. MTCS
a. acetylene cylinder is usually checked in every six months.
b. oxygen cylinder is usually checked in every six months.
c. Beeswax is commonly used lubricant for oxygen equipment& fittings

d. all

72. Which method is used in welding most of the lighter tubing & sheet metals
a. forehand
b.backhand
c. both
d. none

73. An oxidizing flame contains an excess of
a. acetylene
b.oxygen
c. both

74. Expansion & contraction of metal can be controlled by
a. during welding place the metal in air conditioning room
b. tack welding
c.
d. all

75. Which of the following type of flame is used for stainless steel
a. oxidizing flame
 b. carburizing flame
c. neutral flame
d. none

76. Chemical stability means
a.liquid’s ability to resists oxidation &deterioration for long period
b. excessive temp. have great effect on life of a liquid

78. Which type of seals is used with petroleum base hydraulic fluids
a. natural rubber
b.synthetic rubber
c. butyl rubber
d. none


79. If pump becomes unusually hard to turn or jammed, this caused due to
a. section will shear, preventing damage to the pump or driving unit
b. failure in pump drive shaft couplings
 c. all

80. Function of accumulator is to
a. dampen pressure surges in the hydraulic system
b. aid or supplement the power pump when several units are operating at once
c. store power for the limited operation of a hydraulic unit when the pump is not operating
d. All

81. Which composites are used to fabricate ribs and stringers (from-composite)
a. Carbon /Graphite
b. Boron
c. Ceramic
d. none

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