INSTITUTE OF AERONAUTICS & ENGG.

PAPER II
SET 6A
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Q12.
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Q19.

Liquid penetrant test is carried out in

1. Porous plastic
2. Non ferrous metal
3. Unpainted cleaned wood
4. Any one or 2,3,1
Which statement is correct
1. Tank inserted into handle is knows as safe edge
2. When filling is done, use lubricant
3. Blade is made of steel and is not heat treated 4. None
Ohms law is
1. I V
2. V I
3. I R
4. V R
Flux used in soldering is
1. Chemically clean the metal by removing oxide film
2. Increase strength + 1
3. None of the above
Edge distance is
1. 2 times the shank diameter
2. 2 times the sheet thickness
3. 2 times of head diameter`
4. None
Which statement is correct regarding ASI
1. Pitot pressure is given inside capsule
2. Static pressure is given outside the capsule]
3. Measure differential pressure
4. All are correct
Which one is input device
1. Key board
2. Mouse
3. Telephone line
4. All are correct
MODAM (modulator-demodulator) used is
1. A part of CPU
2. A software
3. Input/output peripheral
4. Operating system
When jacking the a/c
1. A/c nose put to the wind
2. Select hard and smooth surface
3. Both 1 & 2
4. None
When defuelling is done on swept back wing a/c best precaution is
1. Outboard tank drain first
2. Fuselage tank drain first
3. Inboard tank drain first
4. All tank drained together
When a/c fuelling with pressure fuelling precaution taken
1. Fuel nozzle pressure kept minimum to the fuel filter
2. Pressure should be adequate
3. Electric s/w on to indicate the fuel quantity on gauge
4. Fuel nozzle inserted before grounding
Negative plate of Ni-cd battery is of
1. Pure cadmium
2. Nickel hydroxide
3. Cadmium hydroxide
4. None
Electrolyte used in lead acid battery
1. KOH
2. Dilute H2SO4
3. Concentrated H2SO4
4. None
Transistor used as
1. Voltage regulator/doubler
2. Rectifier
3. Amplifier
4. All are correct
Convert 37 decimal into binary
1. 100101
2. 111111
3. 101010
4. 110110
How will you remove the screw
1. By welding
2. Drill the head
3. Both 1 & 2
4. None
Bevel gear is used to
1. Transmit single load
2. Transmit heavy load
3. Transmit motion at on angle to
4. Transmit motion between two parallel shaft
After cyaniding quenching is done in
1. Brine
2. Water
3. Oil
4. Both 1 & 3
To stop solder from flowing normally
1. Clay is used
2. A flux is used
3. Steel wool is used
4. None of the above

Q20.
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Hard soldering (Silver soldering is low temperature brazing)

1. Is done at low temperature brazing
2. Produces strength equal to parent metal
3. Both 1 & 2
4. None
Flame is used to heat metal during heat treatment for
1. Small parts
2. Where furnace is not available
3. Heat treatment requirement is not very exacting
4. Large parts and where a particular area is to be heated
Mark the correct statement
1. Detection welds in thicker material UFD is best
2. X-ray best for welds in sheet
3. Both 1 & 2
4. All
When flying along magnetic equator dip will be
1. Increased
2. Remain unchanged
3. Decreased
4. Depend upon direction of flight
Identification of alloy is made of by
1. Alloy identified by color content by stripes
2. Alloy by stripes and content by color
3. Alloy identified by decal
4. Any of the above
Heat treated parts having bake dirt and scale can be cleaned
1. Wire brush
2. Scraping
3. Sand blasting
4. None
Pre and past treatment of cd-plating and ferros part depends on
1. Strength of part
2. Surface hardening and hard spots
3. Corrosion resistance
4. All
The soaking time varies as
1. Till alloy uniformally heated
2. 2 hrs/ unit volume
3. 1 hr/unit c.s area
4. None
Vernier scale is also used in
1. Microscope and spectrometer
2. Sextant and spectrometer
3. Both 1 & 2
4. None
In brazing
1. Post heat treatment may be carried to relieve stresses
2. Post heat treatment may not be carried to relieve stresses
3. Produces strength equal to parent metal
4. None
Prepregs material is
1. Eleminate manual mixing and weighing
2. Must be stored in freeze
3. Also made in unidirectional
4. All are correct
Which statement is correct
1. Boron fibre is made by depositing boron
2. Tungsten and ceramic fibre in high heat application
3. Ceramic used in heat application, dissipating heat slowly
4. Both 1 & 2
Disbond and water in honeycomb and impact damage is detected by
1. Laser holography
2. Ultrasonic
3. Visual inspection
4. None
In npn-transistor, arrow heat indicates
1. Hole flow
2. Electron flow
3. Minority carrier flow from emitter
4. Majority carrier flow from emitter to base
Which statement is correct
1. Weld in thick material can not be detected by ultrasonic
2. Weld in thin material can be detected by X-ray
3. Always detected by dye penetrant
4. All above are correct
The opposition offered in AC circuit are called
1. Impedance
2. Resistance
3. Inductance
4. All
Which of the following is used as voltage regulator device
1. Carbon pile voltage regulator
2. Magnetic amplifier regulator
3. Transistor regulator
4. All are correct
Range of ammeter can be increased by
1. Connecting high resistance in parallel
2. Connecting high resistance in series
3. Connecting low resistance in parallel
4. Connecting low resistance in series
Amperemeter has
1. Low resistance in series
2. High resistance in series
3. Low resistance in parallel
4. None

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Q57.

Transistor is biased
1. Base and emitter forward biased
2. Base and emitter reverce biased
3. None
In square threads
1. Width, height and length are same
2. Difficult to machine
3. More strength
4. All are correct
In ATA-100 systems 36 represents
1. Hydraulic system (29)
2. Oxygen system (32)
3. Pheumatic system (36)
4. Landing gear system (32)
Which of the statement is correct regarding bearing
1. If corrosion is found on the outer surface it should be rejected
2. Bearing must be inspected periodically at least once in a year
3. Shielded bearing is used be inspected for corrosion
4. Both 2 & 3 are correct
The diameter of the aluminium sheet increases
1. As the gauge no increases
2. As the gauge no decreases
3. Remain constant
4. Varies from gauge to gauge
Piezo electricity is produced
1. By the vibration of ceramic
2. By the vibration of quartz Rochelle salt and ceramic
3. Sound waves have no connection with this
4. All are wrong
Titanium can be identified by
1. Spark test (used for various metal and some time from??
2. Moisturing and scratching with a pencil
3. Chemical test
4. Both 1 & 2 are correct
The heat resistance resin is
1. Epoxy (cyclo eliphatic resin)
2. Polyester
3. Thermosetting plastic
4. Thermoplastic
For maximum ductility elongation and impact resistance of Mg-alloy is
1. Solution heat treatment
2. Casted
3. Precipitation heat treatment
4. Both 1 & 3
Precaution in Al, welding
1. Neutral flame is used
2. Preheating is needed
3. Flux is used
4. All
The thickness of the conducting and non conducting coating in ferrous metal can be measured by
1. Varnier coliper
2. Varnier micrometer
3. Ultrasonic
4. Eddy current method
To measure the thickness of the hollow tubular member normally done by
1. Destructive method
2. Eddy current method
3. Ultrasonic method
4. None
A combination set is used as
1. Dipth, gauge, tri-square, scriber
2. Protractor, scriber, trisquare
3. Center head, protractor, scriber
4. None
Mark the correct statement regarding the hardness tester
1. Brinell system uses diamond point
2. Vikers uses round ball
3. Above are correct
4. None
In nickel cadmium battery
1. During discharging the current flows the negative pole to positive plate and oxygen atoms are driven out
from the positive plate
2. Electrical leakage is measured by millimeter between cell and casting
3. Both 1 & 2
Hydrogen is given off during
1. All stages of LAB servicing
2. Over charging of Ni-cd
3. Both 1 & 2
4. None
Dies are used to cut
1. Internal threads of a nut
2. External threads of a bolt
3. Clean the threads
In a capacitor
1. Capacity depends on separation of plates and measured in farade
2. Capacity depends on area of plates and measured in farade
3. Capacity depends on nature of the dielectric material
4. All
Relation between volt, ampere and weber is given by
1. amp/volt2 = weber
2. amp X volt = weber
3. Volt/amp = weber
4. None

Q58.

Q70.

Which statement is correct relating to swaging

1. If the diameter of fitting is too large, it has been over swaged
2. If the diameter of fitting is too small it has been under swaged
3. If the diameter of fitting is too small it has been over swaged and cable fitting must be rejected
4. None
Mooring is the process in which
1. Head of the a/c is in prevailing wing whenever possible
2. Choke all wheels fore and aft
3. Tie down the point on aircraft
4. All
What is the work of crystalyst
1. As curing agent
2. As hardener
3. Mixed with resin
4. All are correct
Nomex is a
1. Honey comb material
2. Reinforced fibre
3. Metrix material
4. None
The properties of composite material is
1. Do not corrode
2. Stress fatigue resistant
3. It reduce wear
4. All
Zener diode
1. Has high forward voltage rating
2. Has negative resistance
3. Has a sharp breakdown of low reverse voltage 4. Used as amplifier
In a dye penetrant test before applying developer what shall be done
1. Dye should be completely flushed out
2. Only excessive dye should be removed
3. The rinsing operation is completely carried out 4. Both 2 & 3 are correct
Which is the correct statement regarding heat treatment of Al- alloy
1. Longer soaking time and lower cooling rate result in greater softening
2. Longer soaking time and higher cooling rate result in greater softening
3. Soaking time should be minimum
4. None
If a magnet is dropped through a current carrying coil it will fall with
1. Uniform acceleration equal to g
2. Uniform acceleration less than g
3. Non-uniform acceleration more than g
4. Non-uniform acceleration less than-g + 2
Type of heat treatment of component depends on
1. Proper used
2. Composition of alloying element
3. Cold work is done
4. All
In annealing grater softening can be achieved if
1. Cooling rate is very low and it is cold in furnace 2. Heating just above the upper critical point
3. Both
4. None
Transfer metal from one object another by chemical and electrical means is done to
1. Protect base metal against corrosion and wear 2. Increase the dimension of a part
3. Protect base metal against reaction
4. All
The symbol shows
2. Mg. alloy
4. Fibre

Q71.

1. Lead & Zn
3. Cu-alloy
Identify the symbol

2. Momentary react type

4. None

Q72.

1. Automatic react
3. Momentary switch type
Identify the symbol

2. Dowel pin
4. Taper pin

Q73.

1. Cam
3. Steel
What is the current direction in the circuit

Q59.

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Q74.

1. 1/3 from a to b
2. 2/3 from a to b
3. 1/3 from b to a
4. Zero
The circular pitch (p) of a gear is
1. Point where the pitch circle of two meshing gears touch
2. Diameter of pitch circle
3. Thread per inch of pitch circle
4. None (distance from the one tooth to the center of next consecutive tooth measured on the pitch circle0

Q75.

In figure (riveting) what fault is shown

2. Damage due to bucking bar

Q76.

1. Damage due to riveting tool

3. Sheet metal bulging
The logic symbol indicates
1. OR-gate
3. NOT-gate

2. AND-gate
4. XOR-gate

Q77.
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Identify the symbol

or
1. Capacitor
3. Resistor
Corrosion on Al-alloy is visible in the form of
1. Powdery form
3. Pitting
The hook spanner is used for
1. Round nut having slot at internal
3. Hexagonal nut having slot at internal
Aviation snips are used for cutting
1. Steel sheets
3. Hard material

2. Condenser
4. None
2. Grey spot
4. Shining spark around the spot
2. Square nut having slot at internal
4. All
2. Al-sheets (heat treated) + 1
4. Soft material