DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
1. In four stroke engine spark plug fires ina. 4 revolutions of crank shaft
b. 2 revolutions of crank shaft
c. ½ revolutions of crank shaft
d. 360 degree revolution of crank shaft
2. Before storing aircraft in hanger
a. Fuel tank should be fully filled
b. Fuel tank should be half filled
c. Fuel tank should be empty
d. Fuel tank should have residual fuel
3. Jacking procedure of aircraft
a. Minimum 4 jacking points are provided
b. The legs of the jacks should be checked to see that they will not interfere with the operations to be performed after the aircraft is jacked.
c.
d. All of the above
4. fires in flammable petroleum products or other flammable or combustible liquids, greases, solvents, paints, etc. is classified as
a. class A fire
b. class B fire
c. class C fire
5. towing speed should not be more than
a. 10km/hr
b. 20 km/hr
c. 50 km/hr
d. Not to exceed wing walkers speed
6. Sparking testing is most common means of identifying
a. Ferrous alloys only
b. Nonferrous alloys only
c. ………..
7. In spark testing which steel gives off long, straight shafts having a few white sprigs
a. Wrought iron
b. Cast iron
c. Low carbon steel
8. T6 in heat treatment indicates
a.
b. T indicates heat treatment and 6 indicates hardness state
c.
9. Heat treatment of aluminum consists of
a. Solution heat treatment
b. Precipitation Heat Treatment
c. Annealing
d. All of the above
10. If distance of cg from datum is 160” and of leading edge of MAC is 140” and length of MAC is 100”. Find MAC %
a. 20%
b. 50%
c. 75%
11. If the input of half wave rectifier is 240 V and transformer has a step down ratio of 8:1, what is the output rms value?
a. 42.2 V
b. 30V
c.
12. 2Mb in computer is equivalent to
a. 2 X 2ˆ20
b. 2 X 2ˆ10
c. 2 X 2ˆ5
d. 2 X 2ˆ1
13. Frequencies used in ultrasonic are in the frequency range of
a. 100 KHz to 5 MHz
b. 200 KHz to 5 MHz
c. 500 KHz to 10 MHz
DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
2 | P a g e w w w . r j w o r l d . c o m e d i t e d b y - R a j u
14. Electro static is dangerous if above
a. 1000 V
b. 100 V
c. 200 V
d. 500 V
15. Static discharge is by
a. High voltage level
b. High current level
c. Low current level
16. In the circuit shown in the figure, calculate the value of value of unknown resistor R when the current in branch OC is zero.
a. 4.5 V
b. 6 V
c. 9 V
d. 12 V
17. Find the Ceq of the circuit shown in the fig. all capacitances are in microfarad
a. 4.4 microf
b. 4.5 microf
c. 6 microf
18. 240 on capacitor indicates
a. 240 microf
b. 240 picof
c. 240000 f
19. Rivnut is
a. Hollow blind rivet
b. A nut
c.
20. DE multiplexer is
a. Output is same as multiplexer
b. Output is opposite of multiplexer
c.
21. Airfoil design is of
a. Wing, turbine blades
b. Nose section of fuselage
c. Elevator, ailerons
d. All of the above
22. cable of medium flexibility and is used for trim tab controls, engine controls, and indicator controls is
a. 7 X 7
b. 7 X 19
c. 1 X 7
23. Which of them is a 5 layer device
a. Diac
b. Triac
c. Variac
24. SCR consists of
a. 3 terminals
b. As in a and middle one is forward biased
c. As in a and middle one is reverse biased
d.
25. Convert C5F2 to binary
a. 1100 0101 1111 0010
b. 0010 1111 0101 1100
c. 0010 1001 0111 1100
26. Convert octal code 3574 to binary
a. 011 101 111 100
b. 100 111 101 011
c. 111 101 011 111
DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
3 | P a g e w w w . r j w o r l d . c o m e d i t e d b y - R a j u
27. Current in inductor
a. Lags voltage by Π/2
b. Inductance is directly proportional to frequency
c.
d. All of the above
28. A metal which can be hammered, rolled, or pressed into various shapes without cracking, breaking, or leaving some other detrimental effect, is said to be
a. Malleable
b. Ductility
c. Elasticity
29. “Austenite” is
a. The name given to steel when it is heated above the critical range, consists of a solid solution of cementite in gamma iron.
b.
c.
30. Mark the correct statement regarding precipitation heat treatment
a. To obtain the maximum strength in aluminum , they must be either naturally aged or precipitation hardened
b.
31. Data transfer in computer is by
a. Series bus
b. Parallel bus
c. Data bus
d. ARINC 429 bus
32. Speed of induction motor is increased when
a. Number of poles is increased
b. Number of poles is reduced
c.
d. All of the above
33. In capacitor if t is the thickness of the dielectric slab, capacitance increases with
a. t increases
b. t reduces
c.
34. MTCS
a. turboprop engine requires lengthy runway than piston engine of same power
b. turbojet has more weight than piston engine of same power
c. turbofan required short runway as compare to turbojet
d. all of the above
35. clipper circuit is used
a. to get a desired wave form
b. as in a and requires a battery source to select a dc voltage level
c. as in a and requires a transistor
d.
36. Thermal runaway
a. Should be avoided
b. Occurs in transistors……..
c. Causes permanent damage
d. All of the above
37. Thyractron is
a. SCR
b. Transistor
c.
d.
38. In oxygen system
a. Gaseous oxygen is chemically stable and is nonflammable.
b. Combustible materials ignite more rapidly and burn with greater intensity in an oxygen rich atmosphere
c. Liquid oxygen causes severe frostbite if it comes in contact with the skin.
d. All of the above
DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
4 | P a g e w w w . r j w o r l d . c o m e d i t e d b y - R a j u
39. Which is an excellent material to use with phosphate ester base hydraulic fluid.
a. Butyl
b. Neoprene
c. Buna n
d. Buna s
40. Yellow color stands for
a. Hydraulic
b. Lubrication
c. Coolant
41. Illustrated parts catalog shows which drawing
a. Orthographic
b. Exploded view diagram
c.
42. Pulse echo method can detect which defects
a. Welds flaw
b. Surface crack
c. Subsurface defect
d. All of the above
43. Internal flaws in composite are detected by
a. Coin tap test
b. Laser holography
c. Ultrasonic
d. All of the above
44. Corrosion along grain boundaries is called
a. Intergranular corrosion
b. Crevice corrosion
c. Galvanic corrosion
45. Turnbuckle has groove or knurl on
a. Right hand side
b. Left side
c. No such hard and fast rule
46. Aluminum is more susceptible to corrosion when substantial
percentage of __________ is present
a. Magnesium
b. Copper
c. Manganese
d. Chromium
47. 33xx indicates in wrought aluminum indicates
a. Copper
b. Manganese
c. Magnesium
d. Silicon
48. The resistance of Manganin
a. increases with increase in temperature
b. change very little as the temperature changes
c. decreases with increase in temperature
49. brazing flux is
a. tin and lead
b. tin, lead and silver
c.
d.
50. Soft brazing temperature is
a. 200˚c to 400˚c
b. 400˚c to 600˚c
c. 600˚c to 850˚c
51. PCB can be repaired by
a. Soldering only
b. With a bare wire that can be shorted across the damage
c. No repair can be done on PCB
52. We can get vastly superior product than iron
a. If carbon is added to iron, in percentages ranging up to approximately 0.5 percent.
b. If carbon is added to iron, in percentages ranging up to approximately 1 percent.
DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
5 | P a g e w w w . r j w o r l d . c o m e d i t e d b y - R a j u
c. If Nickel 3.50%, chromium 1.55% is present
d.
53. Test for demagnetization of parts
a. It consists of placing a suitable magnetic compass in a position away from all stray magnetic influence and slowly rotating at a position along the east/west axis of the compass.
b. It consists of placing a suitable magnetic compass in a position away from all stray magnetic influence and slowly rotating at a position along the north/south axis of the compass.
c. As in b and
d. As in a and if deflection of compass needle more than 1˚ will require the component to be demagnetized again and test repeated.
54. Which resistor has the smallest possible size
a. Wire wound resistor
b. Carbon composition resistor
c.
d.
55. While selecting a capacitor check for
a. Voltage
b. Size
c.
d.
56. Screws are manufactured under
a. Class 1 fit
b. Class 2 fit
c. Class 3 fit
d. Class 4 fir
57. Metal tubing’s are sized by
a. Inside diameter in increment of 1/16 inch
b. Inside diameter in increment of 1/32 inch
c. Outside diameter in increment of 1/16 inch
d. Outside diameter in increment of 1/32 inch
58. Flexible hoses are used where
a. connect moving parts with stationary parts
b. locations subject to vibration and where a great amount of flexibility is needed.
c. It can also serve as a connector in metal tubing systems.
d. All of the above
59. Stringers, bulkhead, skin, rivet and extruded section are made from
a. Cast aluminum alloy
b. Wrought aluminum alloy
c. Pure aluminum
60. Files used for filing internal angles, clearing out corners, and filing taps and cutters
a. Triangular
b. Triangular and three square
c. Knife
d.
61. Hydraulic Ground Power Units can be used for Drain the aircraft hydraulic systems. Filter the aircraft system hydraulic fluid. Refill the aircraft system with clean fluid and check the aircraft hydraulic systems for operation and leaks. All of the above
62. Leveling of aircraft is carried out by
a. Placing spirit level at the pilot seat
b. Placing spirit level at…..
c. Placing a plumb bob……..
d.
63. If rf and af is present, it can be filtered using
a. LPF
DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
6 | P a g e w w w . r j w o r l d . c o m e d i t e d b y - R a j u
b. HPF
c.
d. Π filter
64. In 3Φ star connection
a. Voltage of line is equal to voltage of phase
b. Line current = √3 phase current
c. Line current = phase current
d. Line voltage= √3 phase voltage
65. Two input bubbled AND gate is
a. OR gate
b. AND gate
c. NAND gate
d. NOR gate
66. Slots provided on the armature are not parallel but are staggered at an angle to provide
a. Safety
b. Reduce the humming noise
c. Stability..
d. …..
67. In transformers a low current is provided to the primary in starting
a. To overcome iron losses…
b. To overcome copper losses….
c. …….
d. …….
68. Compensating winding are
a. Connected in series with the armature winding
b. Connected in parallel with the armature winding
c. Connected in series with the armature winding and aids the flux of armature
d. Connected in parallel with the armature winding and opposes the flux of armature
69. In generator frequency depends upon the
a. Revolutions per minute
b. Number of poles
c. Both
70. Highest tensile strength is of which composite
a. Fiberglass
b. Aramid
c. Carbon/graphite
d. Boron
71. 18-8 is composed of
a. 18% nickel and 8% chromium
b. 18% chromium and 8% nickel
c. ……..
d. ……..
72. Parco-lubrizing is a chemical treatment applicable to
a. Aluminum and magnesium parts
b. Iron and steel parts
c. ………..
d. ……………..
73. In oil and chalk process pupose of French chalk is
a. Penetrant
b. Absorbtion by chalk of fluid
c. Developer
d. All of the above
74. Voltage is defined as the
a. Force required to change an electrical power
b. Force required to move a current
c. Force required to move an electric charge
d. …….
75. Damaged internal threads can be repaired by
a. Replacement bushing method
b. helicoil
c. Acres sleeve
d. All of the above
76. Which battery is not affected by high discharge rate
a. Lead acid battery
DGCA PAPER II
Aircraft General Engineering And Maintenance Practices
(October Session 2011)
7 | P a g e w w w . r j w o r l d . c o m e d i t e d b y - R a j u
b. Nickel cadmium battery
c. Secondary battery
d. ……
77. Damaged rivets can be removed by
a. Drive or drift punch
b. Prick punch
c. Hollow punch
d. Both a and b
78. Value of induced emf depends upon
a. Number of wires moving through magnetic field
b. Strength of magnetic field
c. Speed of rotation
d. All of the above
79. In transistor when both junctions are reversed biased it is in a state of
a. Cut off
b. Saturation
c. ……….
d. …………
80. In a circuit a power of 300watt is present and has a voltage of 120 volts, what is the current flowing in the circuit
a. 2.5 A
b. 3.5 A
c. 4.5 A
d. …….
81. If the peak value is 100 volts then at an angle of 30˚ what is the instantaneous value
a. 50 V
b. 100 V
c. 150 V
d. 200 V
82. ICs can be checked by
a. ON/OFF state
b. Logic 0 and logic 1
c. As in (a) and………….
d. Both a and b
83. The is amplified in transistor because of
a. High AC input resistance
b. Increasing Rc
c. High AC output resistance
d. …………
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