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DCGA. PAPER 2 [JUN SESSION 2012]
1. General purpose solder are
a.Tin, lead and copper
b.Tin, lead,copper and Bismuth
c.Tin and lead
d.Tin,lead and bismuth
2. Close 3 fit is
a.Loose fit
b.Free fit
c.medium fit
d.close fit
3. EICAS strands for
a.Engine indicating and crew altering system
b.Engine indicating and aunciating system
c.Electronic instrument and crew aunciating
d.Electronic instrument and centralize audio system
4. Illustrate part catalog use
a.detail drawing
b.exploded view drawing
c.pictorial drawing
d.isometric drawing
5. A metal which can be hammered,rolled or pressed into various shapes without cracking,breaking or leaving some other detrimental effect
a.ductility
b.malleability
c.elasticity
d.toughne
6. Product is vastly superior to iron alone
a.when carbon added to iron in approx.12.5%
b. when carbon added to iron in approx.5%
c. when carbon added to iron in approx.1%
d. when carbon added to iron in approx.10%
7. Corrosion resistance 18-8 steel contain
a.18%nickel and 8%chromium
b.18%vandium and 8%chromium
c.18%chromium and 8%nickel
d.8%chromium and 18%molybdenum
8. Which type of aluminum used in aircraft construction for stringer,bulkheads,skin,rivets and extruded section
a.cast aluminum
b.wrought aluminum
c.Sand cast aluminum
d.both (a) & (b)
9. Convert octal code 3574 to binary
a. 011 101 111 100
b. 100 111 101 011
c. 111 101 011 111
10. Corrosion along grain boundaries is called
a. Intergranular corrosion
b. Crevice corrosion
c. Galvanic corrosion
d. stress corrosion
11.Metal tubings 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
12. Yellow color on tubing indicate
a. Hydraulic
b. Lubrication
c. Coolant
13.Kirchhoffis current law applicable to
a.closed loop ckt
b.single loop ckt
c.junction ckt
14. .When selscting capacitor for ckt parameter should be consider
a.size
b.shape
c.maximum voltage can be applied
15 .In 3F star connection
a. Voltage of line is equal to voltage of phase
b. Line current = v3 phase current
c. Line current = phase current
16.Two input bubbled AND gate is
a. OR gate
b. AND gate
c. NAND gate
d. NOR gate
17.Material use for making wrench
a.chrome-nickel steel
b.molybdenum steel
c.chrome vanadium steel
d.chromium steel
18.The half wave rectifier current is 10A then what is full wave rectifier current
a.14.14A
b.20A
c.20/pA
d.40/?a
19.Micrometer calibration checked by
a.metal gauge
b.dial test indicator
c.surface gauge
20..Five layer semiconductor device whose forward and reverse characteristics are identical to the forward characteristics of the SCR
a.variac
b.triac
c.SCR
d.UJT
21..Amplification of single stage CE depends on
a.A.C resistance
b.Emitter resistance
c.load resistance.
22. In four stroke engine spark plug fires in
a. 4 revolutions of crank shaft
b. 2 revolutions of crank shaft
c. ½ revolutions of crank shaft
d. 360 degree revolution of crank shaft
23.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
d. 10MHZ to 1000 MHZ
23. Electro static is dangerous if above
a. 1000 V
b. 100 V
c. 200 V
d. 500 V
24. 240 on capacitor indicates
a. 240 microf
b. 240 picof
c. 240000 f
25. Demultiplexer is
a. Output is same as multiplexer
b. Output is opposite of multiplexer
c. As in (B) ccu is used
26. 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. Cable sizes ranges from 1/16 to 3/8
27. Convert C5F2 to binary
a. 1100 0101 1111 0010
b. 0010 1111 0101 1100
c. 0010 1001 0111 1100
28. Data transfer in computer is by
a. Series bus
b. Parallel bus
c. Data bus
d. ARINC 429 bus
29. 33xx indicates in wrought aluminum indicates
a. Copper
b. Manganese
c. Magnesium
d. Silicon
30. Soft brazing temperature is
a. 200°c to 400°c
b. 400°c to 600°c
c. 600°c to 850°c
31. Files used for filing internal angles, clearing out corners, and filing taps and cutters
a. Triangular
b. Triangular and three square
c. Knife
d.
32. 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.
33. If rf and af is present, af is desired it can be filtered using
a. LPF
b. HPF
c. Either 1 or 2
d. ? filter
34. Highest tensile strength is of which composite
a. Fiberglass
b. Aramid
c. Carbon/graphite
d. Boron
35. 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
36. In a DC generator the bearings are cooled by
a. By ring oilers
b. By ring oilers and a separate line from oil reservoir supplies oil
c.
37. Magnesium sheets are riveted
a. 5056
b. 2024
c. 2117
38. A dimple in rivet head marking indicates
a. 1100
b. 2117
c. 2014
d. 2024
39. Aluminium alloy of 2” thickness can be welded by
a. Oxy acetylene
b. Electric arc
c. Inert gas
d. All
40. Lift producing device which has no mechanical propulsion
a. Aerodyne
b. Glider
c. Aeroship
41. Airspeed of aircraft 100 mph from A to B .and wind velocity from A to B is 20 mph
Speed of aircraft in ground is
a. 100
b. 120
c. 20
d. 80
42. Colour of hydraulic pipelines
a. Blue-yellow
b. Red-yellow
c. Blue
d. Red
43. Temperature at stratosphere
a. -57 C
44. Piezo quartz crystal produces
a. Piezo electric effect
b. As in (A) frequency depends upon thickness
45. Bolt used in shear type load
a. Clevis bolt
b. Jo bolt
c. Eye bolt
46. Turnbuckles
a. Made of brass and has right hand thread on a one side and left hand thread on other side
47. Occurance of events in piston engine
a. Intake ,compression,ignition, power,exhaust
48. In spur gear
a. Pitch dia and diametrical pitch= no. of teeth
b. Pitch dia = diametrical pitch
c. Addendum *pitch circle =no of teeth
49. Clipper
a. Uses a diode and resistor
b. As in (A) dc supply is required to select the level
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50. Radiography depends upon
a. Thickness
b. Density and size
c. Both
51. Why MOSFET has high input resistance
a. Very less leakage current
b. Negative source and gate
c. Because of depletion layer
d. No channel
52. 8085 microprocessor the operand
a. Direct addressing
53. Gear rack meshed with gear
a. Rotatary motion to reciprocating motion
54. Lead acid batt compartment neutralizing agent
a. Bicarbonate soda
b. Boric acid
c. Vinegar
d. All
55. Wattmeter error occurs
a. Connection different
b. Capacitance in voltage coil
c. Both a and b
d. Both are in correct
56. AN470-H-4-4 rivet . drill used is
a. 10
b. 20
c. 30
d. 40
57. Galvanometer to voltmeter
a. Low resistance in series
b. High resistance in parallel
58. In pure inductive circuit
a. Current lags behind the voltage by pi/2
59. Which flap when extended both area and camber
a. Plain flap
b. Split flap
c. Fowler flap
d. Leading edge flap
60. While drilling MTCS
a. Drill should be shrap and grounded
b. point should be marked with center punch
c. Drill jig prevent error
d. all
61. Heat treatment for Mg
a. Solution heat treated
b. Precipitation heat treatment
c. Case hardening
62. Hybrid in composite means
a. Two or more different layer of reinforcing material
63. Identical insulated wire coils are hung from air so that they face each other and AC current is supplied
a. Attract
b. Repel
c. Rotate in clockwise
d. Rotate in anticlockwise
64. While removing a control surface
a. Ensure no weight should be added ahead of hinge
b. Ensure no weight should be added behind the hinge
65. Diagram –extension bar
66. Diagram- NAS close tolerance bolt
67. Diagram – flute in drill
68. Diagram –one lug anchor nut
69. Diagram circuit breaker
70. Diagram bearing
a.
71. If a rudder pedal is pushed to right
a. Aircraft moves right
b. Rudder mover left
c. Aircraft rolls
72. The V-I characteristics
a. Diode
b. Transistor
c. Varistor
73. Aluminium dope is used in aircraft
a. Used to protect against UV ray’s from sunlight
b. Good finish
74. Lead acid batt the temp increase
a. Resistance increase
b. Capacitance increase
75. Ammeter used for
a. Connect across batt
b. Connect across the generator
c. Show the charge and discharge batt
76. In SAE numbering system the 1st two digits indicates
a. Type of steel
b. Major alloying element
c. Percentage of carbon
77. In transformer the magnetic flux is retained in primary core at no load for
a. Copper loss
b. Iron loss
c. Retentivity
78. Which part is non movable in micrometer
a. Barrel and anvil are non moveable and thimble is movable
79. Two wire are parallel to each other and current given in same direction
a. Field strength reduces and attract each other
80. The magnetic ckt in DC generator consist of
a. Magnetic filed and conductor
b. Magnetic field and inductor
c. Electrostatic field and conductor
81. Permanent magnet type used in instruments
a. Less offered by stray current
b. Low torque/weight ratio
82. DC generator consist of
a. Yoke,pole core,air gap
b. Pole core,armature winding,airgap,commutator
83. In identifying metals .metal shows non magnetic and shows rapid action,greenish blue
a. Carbon
b. Pure nickel
c. Monel
d. Nickel
84. Which of the following parts in basic computer ,receives data and do not do transfer
a. MAR and IR
b. ALU and IR
c. Programming counter and ALU
85. SCR
a. Two junction
b. Three junction
c. Two junction are forward biased and two junction reverse biased
86. A well riveted joint should oppose
a. Shear
b. Torsion
c. Compression
87. Air spray gun sprayed a banana shape because of
a. High atomized
b. Low atomized
c. Full pressure and tip clogged
88. Mark correct statement regarding control cable
a. Cable linkage has the disadvantage that tension must be adjusted frequently due to stretching and temperature changes.
b. Low mechanical efficiency
c. High strength and weight
89. Operational amplifier
90. Find resistance and current in the ckt(could not show diagram)
a. 12ohm and 5 ampere
91. In the circuit shown in the figure, calculate the value of value of unknown resistor R when the current in branch OC is zero.
(DIAGRAM)
a. 6 V
92. If the input of half wave rectifier is 240 V and transformer has a step down ratio of 8:1, what is the output peak value?
a. 42.2 V
b. 30 V
93. Find resistance………
a. 0.667 ohm
b. 0.0667 ohm
c. 0.00667 ohm
d. 0.000667 ohm
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