18 Apr 2014

DGCA Paper-2, Feb 2012, Full Que. Paper(93que)

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FEB-2012 PAPER 2

1. 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

2. Heat treatment of aluminum consists of 
A .Solution heat treatment
b .Precipitation Heat Treatment
c .Annealing
d .All of the above

3.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%

4.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?
a42.2 V
b30V

5.Demultiplexer is
a.Output is same as multiplexer
b.Output is opposite of multiplexer
c.As in b CCU regulates in input and output

6.Which of them is a 5 layer device
a.Diac
b.Triac

7. Convert octal code 3574 to binary
a.011 101 111 100
b.100 111 101011
c.111 101 011 111

8. 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
9.MTCS regarding “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.

10.Data transfer in a/C is by
a.Series bus
b.Parallel bus
c.Data bus
d.ARINC 429 bus

11.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

12.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

13.Yellow color stands for
a.Hydraulic
b.Lubrication
c.Coolant

14.Illustrated parts catalog shows which drawing
a.Orthographic
b.Exploded view diagram
c.

15.Pulse echo method can detect which defects
a.Welds flaw
b.Surface crack
c.Subsurface defect
d. All of the above

16.Corrosion along grain boundaries is called
a.Intergranular corrosion
b.Crevice corrosion
c.Galvanic corrosion

17.Aluminum is more susceptible to corrosion when substantial percentage of  __________ is present
a.Magnesium
b.Copper
c.Manganese
d.Chromium


8. We can get vastly superior product than iron If carbon is added to iron, inpercentages ranging up to
a.Approximately 0.5 percent.
b.Approximately 1 percent.
c. If Nickel 3.50%, chromium 1.55% is present

19.Which resistor has the smallest possible size
a.Wire wound resistor
b.Carbon composition resistor
c.Surface mount resister


20.While selecting a capacitor check for
a.Voltage
b.Size
c.type
d.How much voltage it can withstand

21.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

22.Stringers, bulkhead, skin, rivet and extruded section are made from
a.Cast aluminum alloy
b.Wrought aluminum alloy
c.Pure aluminum

23.Two input bubbled AND gate is
a.OR gate
b.AND gate
c.NAND gate
d.NOR gate


24.Slots provided on the armature are not parallel but are staggered at an angle toprovide
a.Safety
b.Reduce the humming noise
c.Stability.d.…..

25.In 18-8 steel 18% is composed of 
a.Nickel
b.chromium
c.……..
d.……..

26.Parco- lubrizing is a chemical treatment applicable to
a.Aluminum and magnesium parts
b.Iron and steel parts
c.………..

27.Damaged rivets can be removed by
a.Drive punch
b.Prick punch
c.Hollow punch
d.Both a and b

28.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

29.
If the peak value is 100 volts then at an angle of 30˚ what is the instantaneousvalue
a.50 V
b.100 V
c.150 V
d.200 V

30 Wrenches are made of 
a) Carbon steel   b) Tungsten
c) Chrome vanadium steel

31 The type of torque wrench which has the ability to preset the torque
a) Deflecting beam b) rigid frame
c) micrometer setting type

32 Fire extinguisher periodic checklist include
a) remove all external dirt and dust              
b) check for proper weight
c) no nozzle obstruction
d) all of the above

33 The drag which is contributed by the lift
a)induced drag
b)parasite drag
c)profile drag


34 In straight and level flight
a)lift equals drag and drag is the resistance of the air to objects moving throughit
b)thrust equals weight and thrust is derived from jet propulsion or from a propeller and engine combination
c)lift equals weight but thrust equals drag
d)all are correct


35 Variable delivery pump in hydraulic system36 devices which make it possible to obtain more than one voltage from asingle power source
a)Current divider
b)Potential divider
c)Resistance dividerd)All are correct

37 The property of a coil to oppose any change in the current flowingthrough it called
a)Inductance
b)Capacitance
c)Resistance
d)All of the above

38 Maximum allowable weight without fuel
1. Pay load
2. Zero fuel weight

39 medium threads is
a)      Class 1
b)    b) class 2
c)    class 3
d)    

40 Tied down of large a/c
a) Cable b) rope c) chain
d) any of the above

41 aluminum alloy head marking
a)2 raised dash
b ) single raised dash c) astric mark

42 which bolt is used only in tension never in tension
a) Clevis
b) eye bolt


43 A thread running length of the fabric
a) Warp
b) weft

44 Cable MTCS
a) Frequent adjustment of the cable tension
b) Low mechanical efficiency
c) High strong and high weight
d) all

45 what is an alternator
a) Ac current generator
b) dc generator 
c)ac motor

46 In large a/c dc supply comes from
a)     battery only
 b)b) battery &TRU
c)c) battery and generator

47 CRT COLOUR1.Red, green, blue

2.Yellow, red ,green


48 EICAS1.Engine indicating and crew alerting system


49RMS value in half wave is 10 amp, what will be the rms value if it is full wave rectified
 1. 14.14 amp
2. 20/Ï€amp3. 40/Ï€amp

50 Zone numbers on aircraft blue prints are used
to
1. Locate parts, sections and views on large drawing
 2. Indicate different section of aircraft
3. Locate parts in aircraft

51 Which type crack can be detected by MpI using either circular orlongitudinal method?
1. 45degree
2. Longitudinal
3. Transever

52 What Al-alloy designation indicate that the metal has received nohardening or tempering treatment
1. 3003-F
2. 5052-H36
3. 6061-0

53 What tasks are completed prior to weighing an a/c to determine itsempty wt?
1.Remove all items except those on a/c equipment list, drain fuel andhydraulic fluid
2.Remove all items on a/c equipment list, drain fuel, compute oil andhydraulic fluid lot
3.Remove all items except those on a/c equipment list, drain fueland fill hydraulic reservoir

54 Zero fuel wt. is
a) Dry wt. plus the wt. of full crew, passengers and cargo basic operating wt.without crew, fuel and cargo
b) Maximum permissible wt. of a loaded a/c ( passengers, crew and cargo) without fuel

55 The core material of alclad 2024 T4 is
a)     Heat treated Al. alloy internally and the surface material is commercially pure Al
.b) Commercially pure Al. and the surface material is head treated Al. alloyStain hardened Al. alloy and the surface is pure Al


56 Which number represents the vernier scale uraduation of a m/m

1. .00001
2. .001
3. .0001

57 Which too is generally used to calibrate a m.m or check itsaccuracy

1. Gauge block 
2. DTI
3. Machinist scale


58 Kirchof current law applicable only for
1. Closed loop
2.Junction network 
3. Open ckt


59 Fretting corrosion is mostly likely to occur
1. When two surfaces fit tightly together but can move relative to one another
 2. When two distance metals are in contact3. When two surfaces fit loosely together but can move relative to one another

60 Spilled mercury on aluminium
1. Urgently increases susceptibility to hydrogen imbrutement
2. May cause impaired corrosion resistance if left in proposed contact
3. Causes rapid end severe corrosion that is very difficult to control
d)all

61 Direction of single phase motor can be reversed by
1. Using reversible switch
2. Changing the connection of both winding
3.Changing the connection of stating winding

62 Flux is used for
1. Reduce oxidation
2. Remove the oxides
4. All

63 O ring color code indicates
1. Size
2. Shape
3. Vapour and fluid compatibility


Q64.Which cable has high resistance to fatigue?
1. Galvanized
2. Stainless steel
3. Carbon steel

65 Which brazing method is used for precious by localized parts
1. Induction
2. Torch brazing
3)Resistance brazing
4. Furnace brazing


66 When all others parameters are remains unchanged
1. Less the aspect ratio, more the induce drag
 2. More the aspect ratio less the induce drag
3. Higher the angle of attack, higher the induce drag
4. Higher the angle of attack, less the induce drag

67 In orthographic projection
1.              Eight veiws are common
2.    . Two vines are common.
3.  One view, two view and three views are common

68 the main purpose of using core in transformers to
1. Reduce reactance    2. Reduce copper loss

3. decrease the reluctance of common magmetic circuit
4. Reduce iron loss

69 Tempering is used for
1.Reduce hardness and ductility
2. Increases hardness and ductility .
3.Reduces hardness and brittleness

70
Point in atmosphere at which temp remain content
1. Stratosphere
2. Tropopause
 3. Troposphere
4. Ionosphere

71 Convert 127 octal to binary form
a)(1111111)2

72 8085 microprocessor
a)        Direct register73 8085 microprocessor
b)    

74 materials such as magnesium and eureka when temperature increasesits resistence
a) Its resistance increases linearly with temperature
b) Its resistance decreases with temperature
c) Increases
d) Fairly constant over considerable range of temperature

75) In star connection
A IL= √3IP
b) VL=VP
 c) IL=IP

D)….

76) General purpose solders
a)Tin, lead and antimony
b) Tine ,lead and silver

77 During refueling a/c
a) Place chokes
b) Keep the chock little forward
c) Keep the chocke on main landing gear
d) Never keep chocke and parking break should be on

78 standard atmospheric conditions
a) 
b) 29.92 mm of inches of HG at 15degree cel 
c) 52.8 mm of inches of HG at 15 degree cel
d) 14.7 psi at zero degree at O degree cel

79 Regarding resonance of series ac ckt
a) Xl is less than XC
b) Xc is greater than XL
c) Xl=XC
D)all of the above

80) Semiconductor is used as
1 Rectifier
2 Clipper circuit
3 Clamper
4 All of the above

81) Aluminum alloy is used vastly in a/c due to
a) High strength to weight ratio
b) Ease of fabrication

c) Non magnetic and an excellent conductor
d) AOTA

82bolt with asterisk sign on its head
a)standard steel bolt

83ATA chapter -51
a)structure
85 arinc 429 sends data in
A) BCD
b) Binary
c) Any one of the language above

86 which is not associated with discharge of LA battery
A) S.g increases
b) Voltage decreases
c) Both

87) What happen when LA battery temp increases?

88) Mark the wrong statement regarding parallel resistor ckt
A) Different resistor has their individual voltage drop
B) Different resistor has their individual current drop
c) Power is additive

89 when current flown b/w two conductor in same direction
a) Field strength decreases and it attract each other
90when one wheel is jacked nose of a/c
a) Should face into wind
b) Opposite to wind
c) Any direction

91) MCTS regarding computer memory

92) Slip speed

93) When the a/c towed in uneven surface where should the tow bar be connected