How many axis does the aircraft autopilot control?

a) Two

b) Three

c) Four

Ans :b

A diode connected across a coil will

a) prevent back EMF and allow faster switching

b) suppress arching when relay is opening and closing

c) prevent the coil being fitted the wrong way

Ans :b

Which fault does not trip the GCR?

a) Under frequency and under volts

b) Over frequency and over volts

c) Over frequency and under frequency

Ans :c

Differential protection in a generating system

a) detects voltage difference between source and load

b) detects current difference between source and load

c) uses the volts coil to trip the GCR

Ans :b

Open phase sensing on a current transformer

a) is detected using all phases

b) is detected using any phase

c) is detected on generator neutral circuit

Ans :c

Emergency floor lighting system is inoperative, then

a) the aircraft is allowed to fly empty to a main base

b) the aircraft is not allowed to fly until repaired

c) the aircraft is allowed to fly in daylight conditions only

Ans :a

A white light must be

a) of five candela showing from starboard side through an angle of 110 degrees in the horizontal plain

b) of at least 3 candela showing through an angle of 110 degrees from dead astern in the horizontal plain

c) of at least 3 candela showing through 70 degrees from dead astern to each side in the horizontal plain

Ans :c

If battery is switched off in flight the

a) battery is disconnected from bus

b) generator voltage falls to zero

c) captain's instruments will be powered from the standby bus

Ans :a

To flash a generator field

a) generator must be stationary

b) rotate but not on line

c) on line and producing a voltage less than the flashing voltage

Ans :a

A hydraulic motor generator's voltage and current is controlled by

a) the swash plate

b) the constant speed drive

c) the voltage regulator

Ans :c

The ground interlock pins are numbered

a) A and B

b) C and N

c) E and F

Ans :c

A nose down change of trim (tuck under) occurs due to shock induced on

a) tip stall on a straight wing aircraft

b) tip stall on a delta wing aircraft

c) root stall on a delta wing aircraft

Ans :c

Zone 320 under the ATA system is

a) vertical stabiliser

b) central fuselage

c) horizontal stabiliser

Ans :a

When doing a bonding check the maximum resistance between component and earth is

a) 0.005ohms

b) 1/50 ohms

c) 50 milliohms

Ans :c

Which instrument are most likely to damage if you have a rapid drop in pressure, when carrying out a pilot static leak check?

a) Altimeter

b) Air speed indicator

c) vertical speed indicator

Ans :a

The aeroplane fin is of symmetrical aerofoil section and will therefore provide a side-load

a) only when the rudder is moved

b) if a suitable angle of attack develops due either yaw or rudder movement

c) only if a suitable angle of attack develops due to yaw

Ans :b

An aircraft left wing is flying low. The aileron trimmer control to the left aileron trim tab in the cockpit would be

a) moved up causing the left aileron to move down

b) moved up causing the left aileron to move up

c) moved down causing the left aileron to move down

Ans :a

The bearing used in a fibre pulley is

a) a roller bearing

b) a plain bearing

c) a ball bearing

Ans :c

The real time on a CMC is when

a) existing faults page is selected on the CDU

b) ground test page is selected on the CDU

c) fault history page is selected on the CDU

Ans :a

The signal line between the controller and discharge valve is leaking. This will cause

a) the cabin pressure to decrease

b) the cabin pressure to increase

c) it will not effect on cabin pressure

Ans :b

A spill valve opens

a) to control the air from the cabin to outside

b) to control the flow to the cabin

c) to prevent an excessive pressure difference

Ans :b

An aircraft aerofoil is exposed to supersonic flow. The boundary layer

a) is subsonic

b) increases in depth

c) is supersonic

Ans :a

A brake debooster valve is provided for

a) decreasing the pressure and slowly releasing the brakes

b) applying brake pressure slowly and releasing the the brakes quickly

c) increasing the pressure and applying the brakes rapidly

Ans :

A symmetrical aerofoil is accelerating through Mach 1 with an angle of attack of 0°. A shock wave will form

a) on the upper surface only and move aft

b) on the upper and lower surface and will move aft until the point of maximum camber

c) on the upper and lower surface and will move aft

Ans :c

One of the inputs in a CMC is autopilot controls. The data will be stored in

a) volatile memory

b) non-volatile memory

c) erased only after end of sector

Ans :b

The runway heading is

a) QDH

b) QDR

c) QDM

Ans :c

A spar web will take loads in

a) shear

b) tension

c) bending

Ans :a

What kind of seal are used on firewall bulkheads?

a) soft rubber

b) fire-proof grommets

c) None required

Ans :b

A fuel cross-feed valve is powered from

a) AC busbar

b) the battery

c) DC busbar

Ans :c

A fuel cross-feed valve is lubricated

a) by the fuel

b) by internal cooling

c) by air

Ans :a

A cabin altitude is protected against reaching an altitude of 13000 ft by

a) bellows in the outflow valve

b) altitude sensor

c) cabin over pressure relief valve

Ans :b

How is damage to the nose cone of an aircraft prevented during a lightning strike?

a) Bonded Strip

b) Earthing Strap

c) Special paint

Ans :a

ILS marker beacon lights are

a) green, blue, amber

b) blue, amber, white

c) blue, white, green

Ans :b

111.1 MHz is

a) an ILS frequency

b) a VOR frequency

c) a HF frequency

Ans :a

An autopilot PFCU servo brake is

a) energised on

b) energised off

c) energised at the same time as the clutch

Ans :b

A fluorescent tube contains

a) orange coatings, rare gases and mercury vapour

b) phosphor coatings, rare gases and mercury vapour

c) iodine coatings and rare gases

Ans :b

Distilled water should be added to a ni-cad battery

a) when fully charged

b) at any time

c) only in the battery workshop

Ans :a

Overflowing electrolyte in a ni-cad battery indicates

a) excessive charging current

b) not enough charging current

c) low electrolyte temperature

Ans :a

The aviation distress frequency is

a) 122.5MHz

b) 121.5MHz

c) 121.5kHZ

Ans :b

A radar altimeter in track mode is effective to

a) 2000 ft

b) 100 ft

c) 2500 ft

Ans :c

During a normal engine shutdown, generator tripping is initiated by

a) undervoltage

b) underfrequency

c) overcurrent

Ans :a

112.1 MHz is

a) an ILS frequency

b) a VOR frequency

c) an ADF frequency

Ans :b

What does a Decca Navigation system operate on?

a) Low Frequency

b) High Frequency

c) Very High Frequency

Ans :a

What is the minimum separation between a seat back cushion and another seat or fixed structure?

a) 24 inches

b) 26 inches

c) 28 inches

Ans :b

In an autoland aircraft fitted with a CMC

a) all faults are recorded in Volatile memory

b) all faults are recorded in Non-Volatile memory

c) only Primary Faults are recorded

Ans :b

Adhesive Bonding is

a) wetting + gripping

b) wetting + Setting

c) spread + setting

Ans :b

Tension is the stress of

a) twisting

b) elongating or stretch

c) crush or compression

Ans :b

What are the minimum number of fire bottles in a cabin with 201- 300 people?

a) 3 BCF

b) 4 Methyl Bromide

c) 4 Fire Extinguishers

Ans :c

On an aircraft with asymmetrical ailerons what happens to induced drag when banking right?

a) Drag on inside aileron goes up but not as much as the outer

b) Drag on the outer aileron increases

c) Drag on the outer aileron is less

Ans :c

When the primary stops fitted to a control run have been contacted

a) a clearance exists at the secondary stops

b) the secondary stops will just be in contact

c) the secondary stops have been over-ridden

Ans :a

Excessive wear on both sides of the control cable pulley groove is evidence of

a) pulley misalignment

b) cable misalignment

c) excessive cable tension

Ans :a

Auto pilot servo brake is energised

a) to actuate off

b) at the same time as the clutch

c) to actuate on

Ans :a

Hand held mikes are not permissible on

a) public transport aircraft

b) public transport or aerial work

c) private aircraft only

Ans :a

Track altitude in a radio altimeter system begins at

a) 10 000ft radio alt.

b) 2 500ft radio alt.

c) 1 000ft radio alt.

Ans :b

A fuel crossfeed valve is usually in

a) the open position

b) the closed position

c) its last position

Ans :b

Full time yaw damper system detects

a) only low frequencies

b) all frequencies

c) band pass frequencies

Ans :c

What is the radio altimeter track altitude?

a) 500ft

b) 2500ft

c) 10000ft

Ans :b

Which category are hand mikes considered essential?

a) Light aircraft

b) Aerial work aircraft

c) Heavy passenger aircraft

Ans :a

Emergency frequency is

a) 121.5

b) 123.5

c) 125.5

Ans :a

Sliding couplings in fuel systems are used on

a) high pressure systems

b) low pressure systems

c) air or vapour systems

Ans :c

Cargo and baggage compartments in which a fire is completely confined come under

a) Class B

b) Class C

c) Class D

Ans :c

When a current transformer is disconnected what should be done?

a) Terminals shorted

b) Resistor placed across terminals

c) Left open circuit

Ans :a

What does the differential sensing coil sense?

a) Current

b) Volts

c) Power

Ans :a

121.5 Mhz is what frequency?

a) VHF

b) ILS

c) VOR

Ans :a

112.1 Mhz is what frequency?

a) VOR

b) ILS

c) VHF

Ans :a

Where does the GCU gets its power?

a) PMG

b) Battery

c) RAT

Ans :a

Galley loads are wired in

a) series

b) parallel so load shedding will lower current consumption

c) either series or parallel depending on the design

Ans :b

On a fibreglass aerial, what paint should be used?

a) Cellulose only

b) Not cellulose

c) Polyurethane

Ans :b

A current limiter

a) limits current flow to a load

b) opens a circuit after a time/current condition has been exceeded

c) can be used as a radio suppressor

Ans :b

When a load is shed from a busbar the

a) busbar voltage increases

b) current consumption from the bar decreases

c) busbar voltage decreases

Ans :b

In unparalleled AC generation systems the phase rotation of one generator in relation to the others

a) is unimportant

b) must be synchronised prior to paralleling

c) must be BCA

Ans :a

In a multi-generator system, the generator which takes more than its reactive power share is protected by

a) overcurrent and under current protection circuits

b) over voltage and under voltage protection circuits

c) over excitation and under excitation protection circuits

Ans :b

Sharing of electrical loads by paralleled DC generators is controlled by

a) equalising circuits which control the speed of the generators

b) equalising circuits which control the field excitation of the generators

c) automatic load shedding

Ans :b

Excessive commutator sparking can be caused by

a) brushes positioned on MNA

b) weak spring tension

c) rotating field diode failure

Ans :b

Before checking the SG of a battery recently removed from an aircraft

a) allow to stabilise for one hour

b) take the temperature of the electrolyte

c) carry out a capacity test

Ans :a

When painting a neoprene coated radio antenna

a) use cellulose paint

b) use any paint

c) do not use cellulose paint

Ans :c

On an AC external power plug, the interlock circuit is controlled by pins

a) AB

b) CD

c) EF

Ans :c

Over voltage protection circuits are activated

a) before the over voltage limit is exceeded

b) dependent on the magnitude of the overvoltage

c) after a fixed time delay

Ans :b

With respect to flight spoilers they

a) only operate on the ground

b) only operate in flight

c) can operate both on the ground and in flight

Ans :c

Aircraft emergency escape slides are usually pressurised with

a) oxygen

b) CO2

c) helium

Ans :b

As an aircraft descends from cruising altitude (34,000ft), the cabin altitude must

a) stay the same

b) increase

c) decrease

Ans :c

A refrigerant is used in which of the following?

a) Air cycle machine

b) Pneumatic pump

c) Vapour cycle

Ans :c

With aircraft lights - which of the following is true?

a) Starboard light red, port light green, tail light Red

b) Starboard light red, port light green, tail light White

c) Starboard light green, port light red, tail light white

Ans :c

An ECAM system is tested under the following conditions:-

a) Aircraft on the ground with one engine running

b) Aircraft on the ground with parking brake set/on

c) Aircraft in the air with both engines running

Ans :b

With respect Differential Aileron Control, which of the following is true?

a) The up going Aileron moves through a smaller angle than the down going aileron

b) The up going and down going ailerons both deflect to the same angle

c) The down going aileron moves through a smaller angle than the up going aileron

Ans :c

A lead-acid battery is considered to be fully charged when the

a) SG reaches 1.180

b) cells begin to gas freely

c) SG and voltage remain constant for specified period

Ans :c

The preferred method of battery charging a Ni-Cad battery is constant

a) voltage

b) current

c) power

Ans :b

Wing spoilers, when used asymmetrically, are associated with

a) elevators

b) rudder

c) ailerons

Ans :c

In an aircraft flying control system employing servo-tabs, the installation of external ground locks to the main control surface

a) is unnecessary since the system is irreversible and therefore the control surface cannot be displaced by the wind

b) would not prevent movement of the control column

c) would also prevent movement of the control column

Ans :b

Air above Mach 0.7 is

a) compressible

b) incompressible

c) compressible only when above the speed of sound

Ans :a

Supersonic air passing through a divergent duct causes the

a) pressure to increase, velocity to increase

b) pressure to decrease, velocity to increase

c) pressure to increase, velocity to decrease

Ans :b

An aircraft flying below the tropopause descends at a constant True Airspeed, its Mach. No. will

a) increase

b) decrease

c) not change

Ans :b

Spongy brakes are usually a result of

a) air in the system

b) internal leakage

c) external leakage

Ans :a

Over inflated tyres may cause damage to the

a) wheel hub

b) wheel flange

c) brake drum

Ans :b

Blowout panels are fitted to floors of pressurised aircraft to

a) provide access for pressurising the aircraft

b) relieve pressure if the maximum differential is exceeded

c) provide venting should a differential pressure build up across the floor

Ans :c

If an aircraft is yawing to the left, where would you position the trim tab on the rudder?

a) To the left

b) To the right

c) To the centre

Ans :a

If an aircraft is flying with a left wing low, where would you move the left aileron trim tab?

a) Up

b) Down

c) Moving the aileron trim tab will not correct the situation

Ans :a

When a Leading edge flap is fully extended, what is the slot in the wing for?

a) To increase the lift

b) To re-energise the boundary layer

c) To allow the flap to retract into it when it retracts

Ans :b

A purpose of a cut-out in a hydraulic system

a) is to limit loss of fluid in the event of pipe fracture

b) is to prevent creep in jack operated services which have several selected positions

c) is to relieve the pump of load when the operation of services is complete and the accumulator charged with fluid

Ans :c

Hydraulic pressure can be restored by

a) the use of a pressure/heat exchanger

b) compressing the air charge in an accumulator

c) compressing the fluid in a reservoir

Ans :b

A universal protractor used to measure degrees of aileron travel should be zeroed

a) with the aileron in the neutral position

b) with the aileron in the down position

c) when the aircraft is in level flight attitude

A flying control static friction check

a) can only be carried out during flight

b) will demonstrate that a high force is always necessary to operate non-powered controls.

c) demonstrates the force the pilot requires to overcome system inertia and move the controls

Anoxia is due to

a) release of nitrogen bubbles in the blood

b) lack of oxygen

c) low air pressure on the body

The basic system of cabin pressurisation is to arrange a constant

a) inlet and outlet

b) outlet and vary the inlet

c) inlet and vary the outlet

The purpose of the differential capsule in a pressure controller is to control

a) the rate of pressurisation

b) cabin differential pressure

c) cabin air flow

Control of rate of change of cabin pressure is

a) more important in descent

b) equally important in ascent and descent

c) more important in ascent

With a pressurised aircraft at max differential pressure and a cabin pressure increase occurs, the differential capsule in the pressure controller will

a) have a constant mass flow

b) let all pressurising air to be spilled over board

c) let pressurisation to be switched off until leaks cause a drop in pressure

If the cabin altitude increases above the normal maximum

a) a warning light comes on in the cockpit

b) compressor delivery is automatically boosted

c) an inward relief valve opens

Fuel cross feed valves are lubricated by

a) fuel

b) special lubricant

c) no lubrication needed

Fuel cross feed valves are operated by

a) 28 v dc bus

b) battery dc

c) 115 v ac

Part - 2

1. Static margin is the distance between

a) aerodynamic center & neutral point

b) aerodynamic center & center of gravity

c) center of pressure & center of gravity

d) neutral point and center of gravity

2. During nidder maintenance

a) chord line should be parallel to horizontal

b) hose over condition is called over balance

c) hose down condition is called over balance

d) as in a & c

3. Loft does not depend on

a) aerofoil design

b) amount of using dehedral

c) density of air & velocity

d) wing surface area

4. Which of the following should also be checked in addition to hard landing inspection items, when the a/c makes hard landing

a) wing center section

b) arcing of propeller

c) balancing of control surfaces

d) none

5. Artificial feel is used in

a) aileron control system

b) elevator control system

c) rudder system

d) all

6. Which of the following takes the structural loads in the wheel bay?

a) keel beam

b) transverse beam

c) box beam

d) all

7. Structural fuse

a) prevents primary structure damage

b) previcts shear loads

c) prevents overflow of current in the circuit

d) as in a & c

8. Color coding of ‘O’ rings indicates

a) age

b) temp

c) vapour compatibility

d) all

9. The angle of attack where lift/drag ratio is maximum is called

a) ditedral

b) anhedral

c) incidence

d) washin

10. Mark the correct statement

a) stall speed with c.g forward movement

b) stall speed with backward movement

c) stall speed does not change with c.g movement

11. Station 185 indicates

a) 183 mm back of the nose or reference datum

b) 183 inch back of the reference datum

c) 183 cm back of the nose or reference datum

d) 18.30 inch back of the nose or reference datum

12. ‘Out of freezer’ life is associated with

a) epoxy resin

b) catalyst

c) prepeg

d) thermosetting

13. Amount of roll dies not depend on

a) Angle of pitch

b) Angle of bank

c) Angle of turn

d) As in a & c

14. Damage of rivets around the head is usually

a) grey

b) white

c) brown

d) as in a & c

15. The a/c is about to land, the fowler flap is extended, it will cause:

a) in lift

b) in drag

c) lift with nose drag movement

d) normal

16. When the temperature is more than standard value, the TAS will be

a) higher

b) lower

c) first & then remains with effected

d) remains inaffected

17. Strain is measured by

a) original length divided by change in length

b) force by area

c) pressure multiplied with change in length

d) unit distortion of body

18. How selection provides

a) 250v AC

b) 218 v AC & 121v respectively

c) 218v, 400 Hz AC

d) none

19. Adverse load distribution requires

a) gross weight inspection

b) aft adverse loading check

c) forward adverse loading check

d) all the above

20. Which pressurization system component prevents cabin altitude being more than the a/c altitude

a) safety relief valve

b) negative pressure relief valve

c) compressor inlet sentor

21. A solid metallic sound in coin tap test of honeycomb structure indicates:

a) core damage

b) facing damage

c) facing & core damage

d) separation of layers in honeycomb constructions

22. Smoke clearance system is used with

a) pneumatic systems

b) fire protection system

c) as in b and a pre-set temperature

23. Emergency exit devices located/associated with

a) cabin entry doors

b) passenger entry doors

c) cargo entrance

24. To avoid tip stalling & making the aileron effective for complete flight, wing is provided with was out, wash out means

a) incidence is angle is greater at wing tip than wing root

b) incidence angle is greater at wing root than wing tip

c) wing tip is a located ahead when componed to wing root

25. Under inflation is indicated by

a) shoulder wear out in the tyre

b) more tread wear

c) high brake heat

26. Tail skid prevents

a) tail section damage

b) rotation of a/c

c) as in a & c

27. Static discharge damage is identified by

a) pits on the surface

b) wing tips & trailing edges are damaged

c) round holes on the surface

d) usually found at wing tips, trailing edges & antennas

28. When proper jigs are not available, the smoothness of center of the a/c wing is measured by

a) applying Vaseline & cellulose paper

b) using a thin cord along the leading edge to trailing edge parallel to the line of flight

c) veins a thin cord long the lending edge to trailing edge parallel to the lateral axis

d) both a & b

29. Boundary layer thickness is minimum where

a) airflow gets zero to max velocity change

b) airflow velocity is maximum

c) –

d) –

30. At high altitudes, presence of foam in hydraulic fluid is caused by

a) defective pressurization system

b) no hydraulic fluid in the system

c) low pr in the system

31. Purpose of surge tank is

a) it protects tank structure damage

b) it allows fuel to flow into the tank which is at a laterally lower level

c) it collects over flowing fuel

d) as in b & c

32. With in airspeed

a) induced drag more than parasite drag

b) parasite drag more than induced drag

c) induced & parasite drag will be same

d) induced & parasite drag will not be affected

33. Surface hardness of steel

a) with of carbon content

b) only upto a certain point with of carbon content

c) max for wrought iron

d) depends on the process involved

34. Parts which are cold worked should not be

a) welded

b) kept in room with high our temp

c) kept in air conditioned room

d) –

35. Corrosion on spot welding seam is detected by

a) X-ray

b) Ultrasonic

c) Straight edge

d) Point peeling off

36. Mark the correct statement

a) spoilers are used with ailerons for lateral stability about longitudinal axis

b) flaps & spoilers are auxiliary control surfaces used for lateral stability

c) –

d) all the above

37. Contamination of hydraulic fluid is found by

a) viscosity

b) flash point

c) moisture content

d) all the above

38. Mark the correct statement

a) damage of nose cone does not affect flt of an a/c

b) damage to secondary structure like wing tip & nose cone does not affect the flt of a/c

c) damage to seat & seat supporting structure affect flight

d) none of the above

39. Mark the correct statement regarding reynold’s number

a) if the Rey’s no is high then kinematic velocity is high

b) higher the Rey’s No., higher the kinematic viscosity

c) higher the Rey’s No, smaller the kinematic viscosity

d) higher the Rey’s No. smaller the kinematic viscosity & velocity

40. Vortex generators are aerofoils installed on wing upper surface because

a) laminar flow is more difficult to separate than turbulent flow

b) turbulent flow is more difficult to separate than laminar flow

c) –

d) –

41. Balance panels are operated

a) hydraulically

b) manually

c) only in turbulent weather

d) to balance the ailesins

42. Mark the correct statement

a) steel & magnesium is used for secondary structural members

b) fiberglass & magnesium is used for secondary structural members

c) Al honey comb & fiberglass honey comb structure is used for secondary structural member

d) Al is used for a particular type of lead only

43. Mark the correct statement

a) if one rivet is tripped, then the adjacent rivets are also tripped in the same direction

b) bearing failure occurs at rivet shank

c) shearing failure occurs at rivet hole

44. Turn & slip indicator measure

a) the amount of tum

b) the rate of tum

c) in slip the amount of tum is too low

d) in skid the amount of tum is too high

45. The acceptable deviation in magnetic compass due to local effects the aircraft is

a) 1°

b) 2°

c) 3°

d) 5°

46. Mark the correct statement

a) phosphating on steels prevents corrosion

b) chromatizing is done on aluminium as a protective treatment against corrosion

c) cadmium plating on aluminium penetrates into the base metal there by giving corrosion resistance

d) all the above

47. In the operation of VSI

a) diaphragm expands in climbing

b) diaphragm shrinks in climbing

c) diaphragm expands & shrinks in level flt

d) both b & c

Part - 3

Alloy used for stringer is

a) 7075-T 76

b) 7075-T 6

c) 7075-T 36

d) 7075-T 36&7075-T 73.

A+ Aerodynamics center the potching moment Co-efficient is

(a) dependent upon co-efficient of lift (CL)

(b) dependent upon co-efficient of lift & CP

(d) Dependent upon CL& center.

Mark the incorrect statement.

(a) For minimum drag the lift co-efficient is equal to its lift dependent drag Co-efficient.

(b) At higher incendents lift arises from difference between reductions on upper & lower surface of wing.

(d) Activity factor is measured on power absorption of Air serves.

Location of c.p is a function of –Ref page automotive flight construction.

(a) Camber (b) CL (c) Camber & CL varies with angle of attack (d) Camber varies with angle of attack

The angle of attack at which fail moment is equal to using movement

(a) Neutral point (b) Trim point (c) Stick fixed point (d) Stick free point @ s/p.

Degree of longitudinal stability is effected by relative position of both

(a) Center of pr & aerodynamic center (b) CP & CG

Static Margin is the distance of

(a) Aerodynamics center to neutral point

(b) C.P is neutral point

(d) CG to neutral point

Tab used at high speed

(a) Servo tab

(b) Balance tab

(d) Trim tab 95/F

STRUCTURE

9.The station number is distance in enhance from

(a) A yew reference point forward of fuselage

(b) Reference point on the nose tip

(d) Reference point at the most forwarded C.G point of empty a/c

10. The languorous are

(a) Rolled HAT section

(b) Extracted z sections

(d) Rolled & forged z sections.

11. Extensive use of metal biding in a/c constructions

(a) Fatigue resistance only (b) Corrosion resistance of only power

(a) Max thickness area of heavy loading

(b) Min thickness area of reduced loading

(d) Thickness at high tort ional loads

13. Plate between front and rear span

(a) Has thickness tapered

(b) Is butt spliced

(d) Has tapered thickness with flush fastness

14. Alloys use in a/c are hardened by

(a) Cold working (b) Aging (c) Heat treatment (d) Chemical treatment.

INSTRUMENTS

15.In sensitive ASI the scale can be made liner by

(a) Introducing banana shaped slat in the toothed wheel, which meshes with pointer percon

(b) using turning spring

(d) All the above.

16. Max safe airspeed criclicator

(a) Does not require true temperature compensation

(b) Require true max safe and total Airspeed

(d) None above is correct

17. Mark the correct statement

(a) There is no apparent wander of gyro at equator

(b) If gyro is moved from north pole to south pole around earth surface than the apparent wonder would change from counter clock wise to clock wise

(d) All the above are correct.

18. In ratio meter type instrument

(a) Coil carring stranger current moves in stronger part of it

(b) No effect of flucations of input voltage

19. Artificial Horizon

(a) Has a complete freedom 360° in roll and 85° freedom input is hat it is difficult But not impossible topple the horizon

(b) Has a wonder rate of gyro less than 15° per hour

(d) All the above are correct.

20. If a/c alternates on easterly heading the compass will indicate

(a) Apparent turn towards north

(b) Apparent turn towards south

(d) None of the above.

21. Hear spring is a instrument

(a) Is provided to negative back lash and statement

(b) Serves as controlling force against reflecting force

(c) Is strip of Nl, Fe alloy to sensitive to allows greater amount of flux between the pole to pole temperature when temp increases + statement

(d) None of the above

22. Air speed indicator measures

(a) Dynamic pr (b) Dynamic-static pr (c) Dynamic+static pr (d) Staticpressure

23. Cabin altitude indicator is

(a) An alternator calibrated to some pr latitude test as a normal altimeter

(b) A bounden type pr gauge

(d) None of the above

24. Rate of climb indicator is

(a) A different pr gauge to indicate rate of altitude change

(b) Not a D pr gauge sime operation depends upon static programme

(d) Effected by position error

25. Rate of climb indicator

(a) Has two springs for selling range, which bears on stem connected to center piece.

(b) With range setting spring to extent force of capsule to achieve relation between capsule pr deflection characteristic

(d) All above the are correct

26. Dip magnetic compass

(a) Is caused by the horizontal component of earths magnetic field

(b) Is called by vertical component of earth magnetic field

(d) Both a & b are correct

27.If pilot tube is blocked airspeed indicator reading while sending will

(a) Decrease (b) Increase (c) under speed (d) over head

28.ASI indicator can be modified to read

(a) Equivalent air speed

(b) Mach numbers

(e) All the above

AUTO PILOT

29. In two phase induction motor type of serve motor of an auto pilot the reference phase is supplied by

(a) 26v 50 Hz (b) 115v, 400Hz (c) 240v, 400Hz (d) 220v, 50

30.When automatic control is selected in electro HYDRAULIC auto pilot system

(a) The engage com is out of detent

(b) Engage signal is fed to the 5.0 volts

(d) Pilot control valve is operated

31. The component different between position control servomechanism and speed control mechanism is

(a) Serve motor (b) Techno generator (c) Potentiono meter (d) error detector

32.Mark the correct statement

(a) Yaw damper will not oppose pedal movement of pilot

(b) The speed monitor identifies speed a/c for application of control

(d) Under normal condition of load, the torque applied to input member by servo meter is transmitted to intermediate member.

33. When control wheel is released in control wheel sterling the automatic control

(a) Holds a/c at originally selected altitude

(b) Is provided by a pilot & Roll forces simultaneously pilot through force transactions

(d) Both b& c correct.

34.Wing leading edge using control achieved by

(a) PrerumaticThermal & thermal system

(b) Thermal & electrical system

(d) All the above

35. Thix tropic Agent

(a) Decreases stress

(b) Decreases temp sensitivity

(d) Increases temp sensitivity

36. Expansion slot in rotary brake discus assembly

(a) Prevents excessive heat description

(b) Prevents warping from heat

(d) Increases efficiency of brakes system when brakes area

37. Mark the correct statement

(a) Pr demand type of regulator is used for both crews

(b) Pr demand type of regulator is used only for crew

38. Upper & lower bearing in main L/G shock strat programme

(a) Only sliding surface between inner Souter cylinder

(b) Only air seal between inner & outer cylinder

(d) Sliding surface and air seal between inner souter cylinder

39. In HYD main L/G system the rate of gear extension is slowed by

(a) In build snubber design

(b) Check valve is upline

(d) Orifice check valve in upline

40. What prevents L/G from being retracted after has lowered

(a) Lock strut (b) Down lock & Lock strut (c) Down lock (d) Down lock & weight of the a/c

41. Some relief valves provide an overflow features to

(a) To provide pr lock

(b) Prevents cavitations

(d) Compensate for temperature variation

42. Mark incorrect statement

(a) HYD fuse is device to seal broken HYD line

(b) Follow up selector valves are used in L/G system

(d) Sequence valves are sprout type and by pass check valves

43. In angular type HYD pump the angle between cylinder block axis and drive shaft axis can be varied by

(a) Pr control unit

(b) Spring unit

(d) Swivel yoker

44.When sprout type hydraulic pr regulator is in KIKKED” in piston the directional sprout is in a position to direct pr to

(a) The pilot valve to keep it open

(b) The unloading valve to keep it closed.

(d) The pilot valve to keep it closed.

45.Fittings used to attach the MLG to wings are secured with

(a) Interference fit

(b) Closed tolerame fit

(d) Permanent type

46. Antiskid system

(a) Can use mechanical fly wheel type of skid detector

(b) Can use electrical & selectronic type skid detector

(d) All the above are correct

47. Co lour Hyd system tabbing is

(a) Yellow, blue, Yellow

(b) White, blue, white.

(d) Light blue, Yellow, Colorless.

PRESSURISATION

48. A line from isobaric control valve to the throat of ambient venture

(a) A low pr reference to manual controller

(b) A low pr reference to auto controller

(d) A high pr reference to auto controller

49. The rate of selection of pressurization system regulates rate of air flow between

(a) Control chamber & venture

(b) Rate chamber & venture

(d) Rate chamber & manual controller

50. Mark the correct statement

(a) Vacuum relief system provides automatic control signals only

(b) Vacuum relief system provides both auto & manual continue signals only

(d) Cabin barometric selector control landing field altitude

51. The purpose of negative pr relief valve is to

(a) Select pressurization at stations when aerodrome elevation below sea level

(b) Allow out –side air to enter fuselage when out side pr is greater than inside pressure

(d) Half differential pr. Relief valve in case ambient pr become less than pr inside airplane

52.Turbine engine air is used for air conditioning & pressurization cooled

(a) Compressed air (b) Ram air (c) Conditioned air (d) Bleed-Air.

53. How the cabin of an a/c usually controlled

(a) By pressure automatic out flow that dumps all pressure excess of the amount for which it is

(b) By pr- sensitive valve that consents output of pressurization pump.

54. Cooling device in planes consist of

(a) Fan air, Ram air actuator, ACM

(b) Primary H.E., secondary H.E., and Fam air

(d) ACM, primary H.E., 7 secondary H.E.,

55. Air in pack is at lowest temperature at

(a) Out let of primary H.E.,

(b) Out let of secondary H.E.,

(d) Out let of turbine

56. Out flow valve is for

(a) A./c system only

(b) Pressurization systems only

(d) A/c & recirculation only

57. In the event of pressurization failure protection by

(a) Positive pr. Relief valve

(b) Negative pr. Relief valve

(d) Check valve

58.In pressurization system mode selection switch on ground

(a) For recirculation

(b) For ground operation

(d) For ground operation of ventilation systems

59. A small orifice in manual control pressurization valve provides

(a) High pr reference for manual controller

(b) High pr reference for auto controller

(d) A low pr reference for auto controller

Part-4

1. Composite with high compressive strength - boron

2. L/G lateral load taken by – Side strut

3. Before fuel tank welding – purge with steam

4. Composite for core – PVC & urathene

5. ‘Flag Out’ goes out of view – when PWR is out

6. Primary structures – Frame & longeron

7. Wing heating due to engine location – will accelerate transition

8. Flap over load valve – Retract flaps to prevent damage.

9. Velocity increases – induced drag decreases

10. L/G down causes – parasite drag

11. Principle of AOA indicting system – not parallel to the true AOA of a/c

12. Definition – wing bitt line

13. Roof skin thickness is – less

14. Stressed skin metal sing subjected to velocity – a group of rivet lead dipping

15. Damage on wing tip & radame – will not affect a/c safety

16. Static pr line disconnected inside pressurized cabin – ASI & altimeter read low

17. L/G down enabling by orifice check valve

18. Brake creeping – contamination of brake linings / glazing

19. To check shock strut fluid level – release air & remove valve

20. Cricket bull seam, rough surface – high Reynolds number, lift

21. T/Reverser principle – Newton’s law

22. Fast erection of gyro hampered by –

23. At the time of installation accelerometer should read + 1G

24. Wind shield made of thermosetting plastic

25. L.E flap made of – Al casting

26. Intergranular corrosion – grain boundaries

27. Sherordizing process – Dipped in molten Zn

28. In a/c, air enter – reheater to turbine

29. Gyros – terrain clearance

30. Spoiler – Assist in roll control

31. Remissible deviation in magnetic compass

32. Compass caliberation, coefficient A is

33. Compass compensation – divide by 8

34. If O2 system pr kept law – moisture accumulating

35. Smoke clearance is part of – A/c system

36. If peak temp goes high – temp control valve modulate close

37. Purpose of fuel tank venting – to prevent damage, collapse suction

38. A stripe mark rim to side wall of tyre. Slippage (creep) identification

39. Annealing makes st. steel – removal stresses, soft machinative

40. Gear type hyd pump is +ve displacement pump because – transfers uniform rol of fluid in each turn

41. Resistance type temp indicator used – wheel stone bridge circuit

42. Shear between layer takes place – within boundary layer

43. A/C nose tip – stagnation pt, highest pr

44. Plain flap on deflection - effective AOA

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PSEB 12th Model Paper 2022September 22, 2021 at 8:31 PM
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Module-11 Aeroplane Aerodynamics

STRUCTURE

AUTO PILOT

PRESSURISATION

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