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Module 11B > 11.13 Landing Gear MCQ > Flashcards

11.13 Landing Gear MCQ Flashcards

1
Q

Spongy brakes are usually a result of.
Option A. internal leakage.
Option B. air in the system.
Option C. external leakage.

A

Correct Answer is. air in the system.

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2
Q

Over inflated tyres may cause damage to the.
Option A. brake drum.
Option B. wheel hub.
Option C. wheel flange.

A

Correct Answer is. wheel flange

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3
Q

A brake debooster valve is provided for.
Option A. applying brake pressure slowly and releasing the the brakes quickly.
Option B. increasing the pressure and applying the brakes rapidly.
Option C. decreasing the pressure and slowly releasing the brakes.

A

Correct Answer is. applying brake pressure slowly and releasing the the brakes quickly.

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4
Q

Tubeless tyres are stored.
Option A. at 15 to 20 P.S.I.
Option B. horizontally maximum of four high with smallest diameter tyre on top.
Option C. vertically.

A

Correct Answer is. vertically.

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5
Q

On a wheel bogie unit, positive camber is when the.
Option A. bottom of the wheels are closer together.
Option B. top of the wheels are closer together.
Option C. front of the wheels are closer together.

A

Correct Answer is. bottom of the wheels are closer together.

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6
Q

A badly corroded and pitted brake disk will.
Option A. wear brake pads too quickly, and should be replaced.
Option B. be serviceable, and provide better grip.
Option C. produce a loss of fluid.

A

Correct Answer is. wear brake pads too quickly, and should be replaced.
Explanation. Badly corroded brakes should be replaced.

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7
Q

How much oxygen is in a tyre (as a maximum)?.
Option A. 5% by pressure.
Option B. 15% by volume.
Option C. 5% by volume.

A

Correct Answer is. 5% by volume.

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8
Q

A tyre specification 32 x 10.75-14. What does the 10.75 refer to.
Option A. Section Width.
Option B. Bead diameter.
Option C. Overall diameter.

A

Correct Answer is. Section Width

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9
Q

When servicing an oleo, fluid comes out of the air valve when the leg is depressurised?.
Option A. The leg is serviceable - the separator has bottomed.
Option B. Leaking air/oil seals.
Option C. Separator plate stuck open.

A

Correct Answer is. The leg is serviceable - the separator has bottomed.

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10
Q

The type of fluid in an oleo strut will depend upon.
Option A. type of fluid most readily available.
Option B. the type of seal material.
Option C. heat generated in operation of the system.

A

Correct Answer is. heat generated in operation of the system.
Explanation. The type of fluid in an oleo strut will depend upon heat generated in operation of the system.

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11
Q

A restrictor valve.
Option A. speed up the flow in one direction.
Option B. may be used to slow down undercarriage extension.
Option C. restrict the extent of travel of the undercarriage.

A

Correct Answer is. may be used to slow down undercarriage extension.

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12
Q

The function of the oil in a shock absorber is to.
Option A. ensure the separator does not bottom.
Option B. damp the rebound.
Option C. absorb the landing shock.

A

Correct Answer is. damp the rebound.

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13
Q

he purpose of the flutter plate in a shock absorber is to.
Option A. permit free flow of oil during compression and restriction of oil during extension.
Option B. restrict the compression of the air.
Option C. separate the oil from the air.

A

Correct Answer is. permit free flow of oil during compression and restriction of oil during extension.

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14
Q

Made up wheels should be stored.
Option A. vertical at working pressure.
Option B. vertical at 20/30 PSI charge.
Option C. horizontal no more than 4 high.

A

Correct Answer is. vertical at 20/30 PSI charge.

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15
Q

“After MLG down and securely locked, a red light is illuminated
n the flight deck. The possible causes are.”
Option A. shorted sensor.
Option B. out of adjustment sensor.
Option C. wiring problem.

A

Correct Answer is. out of adjustment sensor.

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16
Q

When checking for alignment of a MLG, check.
Option A. symmetry, tracking, camber.
Option B. symmetry, splay, tracking.
Option C. symmetry, twist, tracking.

A

Correct Answer is. symmetry, tracking, camber.

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17
Q

These markings are found on a tyre32 x 10.45 R 14.What does the number 32 mean?.
Option A. Outer diameter.
Option B. qwidth.
Option C. Inner diameter.

A

Correct Answer is. Outer diameter.

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18
Q

A green/grey dot marking on aircraft tyre casing represents.
Option A. breather points.
Option B. the light part of the tyre.
Option C. military reference.

A

Correct Answer is. breather points.

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19
Q

In detachable flange type wheels, the flange is secured by.
Option A. a retainer plate.
Option B. a lock ring.
Option C. bolts.

A

Correct Answer is. a lock ring.

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20
Q

Fuse plugs in aircraft tyres are.
Option A. for over temperature protection.
Option B. for overpressure protection.
Option C. to deflate the tyre before removal.

A

Correct Answer is. for overpressure protection.
Explanation. AL/3-19 3.1.2 Fuse plugs protect the tyre from explosion due to overpressure, albeit the overpressure as a result of temperature rise.

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21
Q

A breaker strip in an aircraft tyre is.
Option A. to provide strength.
Option B. to provide a wear indication.
Option C. to indicate the position for tyre levers.

A

Correct Answer is. to provide strength.

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22
Q

If fluid leaks along with air whilst oleo charging, this is.
Option A. caused by a leaky seal.
Option B. normal.
Option C. due to excessive charging pressure.

A

Correct Answer is. caused by a leaky seal.

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23
Q

A red dot / triangle mark on aircraft tyres means.
Option A. military reference.
Option B. the light part of the tyre.
Option C. breather points.

A

Correct Answer is. the light part of the tyre.

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24
Q

On selection of MLG down, the gear extends then begins to retract again. The cause is.
Option A. a faulty selector valve.
Option B. a faulty actuator.
Option C. gear lowered at too high an airspeed.

A

Correct Answer is. a faulty selector valve.

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25
Q

When fitting a tyre, the red dot should be positioned.
Option A. on the other side of the wheel opposite to the charging valve.
Option B. opposite the charging valve.
Option C. adjacent to the charging valve.

A

Correct Answer is. adjacent to the charging valve.

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26
Q

Composite brake units.
Option A. weigh the same as normal brake units and fade away athigh temperatures.
Option B. have less weight than normal brake units but fade away at high temperatures.
Option C. have less weight than normal brake units and have increased efficiency at high temperatures.

A

Correct Answer is. have less weight than normal brake units and have increased efficiency at high temperatures.

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27
Q

A restrictor valve can be used.
Option A. to increase the speed of undercarriage retraction.
Option B. to increase the speed of the undercarriage extension.
Option C. to reduce the speed of the undercarriage extension.

A

Correct Answer is. to reduce the speed of the undercarriage extension.

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28
Q

When an undercarriage is lowered, it tends to creep back up. The fault could be.
Option A. the emergency system.
Option B. a leaky selector valve.
Option C. a stuck relief valve.

A

Correct Answer is. a leaky selector valve.

29
Q

Vents holes are found on.
Option A. tubeless tyres.
Option B. tubed tyres.
Option C. tubed and tubeless tyres.

A

Correct Answer is. tubed and tubeless tyres.

30
Q

At what temperature does a yellow fuse plug melt at?.
Option A. 150°C.
Option B. 250°C.
Option C. 200°C.

A

Correct Answer is. 200°C.

31
Q

The cam plate in a nose undercarriage is.
Option A. part of the shimmy damper.
Option B. to align for nose wheel on nose undercarriage retraction.
Option C. for alignment of the nose wheel steering on nose undercarriage extension.

A

Correct Answer is. to align for nose wheel on nose undercarriage retraction.

32
Q

What is tyre creep related to?.
Option A. Horizontal movement of the tyre.
Option B. Vertical movement of the tyre.
Option C. Tyre moving around the wheel.

A

Correct Answer is. Tyre moving around the wheel.

33
Q

Aquaplaning’ can be reduced by.
Option A. increased flaring.
Option B. lowering slats.
Option C. an anti-skid device.

A

Correct Answer is. an anti-skid device.

34
Q

Why is a hydraulic damper fitted to a nose wheel steering system?.
Option A. To reduce vibration and shimmy.
Option B. To centralise the nose wheel during an up selection.
Option C. To centralise the nose leg assembly during an up selection.

A

Correct Answer is. To reduce vibration and shimmy.

35
Q

What decides the type of oil used in an undercarriage leg?.
Option A. The material of the leg.
Option B. The types of seals the leg uses.
Option C. Neither, any oil can be used.

A

Correct Answer is. The types of seals the leg uses.

36
Q

In an anti-skid system.
Option A. brakes are modulated to give most efficient braking.
Option B. brakes release on rising torque.
Option C. brakes release on falling torque.

A

Correct Answer is. brakes are modulated to give most efficient braking.

37
Q

If an undercarriage oleo has insufficient deflection, the likely cause is.
Option A. oil level too high.
Option B. loss of pressure/leakage.
Option C. air pressure too high.

A

Correct Answer is. air pressure too high.

38
Q

A Maxaret is used in what system?.
Option A. Tyre inflation.
Option B. Skid control.
Option C. Self centring landing gear.

A

Correct Answer is. Skid control.

39
Q

The pilot receives an audible warning on the flight deck as the aircraft is descending to land. The most likely reason for this warning is.
Option A. the airspeed is too high.
Option B. the landing gear is not locked down.
Option C. the rate of descent is too high.

A

Correct Answer is. the landing gear is not locked down.

40
Q

A restrictor in the landing gear hydraulic retraction and lowering system is positioned in the.
Option A. landing gear up line.
Option B. landing gear down line.
Option C. return line from the landing gear selector.

A

Correct Answer is. landing gear up line.
Explanation. The restrictor is placed in the retraction line to slow the rate of exit of fluid from the jack on extension, to slow the rate of extension.

41
Q

Wheel speed information is used in auto speed brake systems.
Option A. to stow the spoilers automatically when the aircraft has nearly stopped.
Option B. to ensure the aircraft has touched down and to give a slight time lapse before spoiler deployment.
Option C. to ensure the aircraft is still rolling.

A

Correct Answer is. to ensure the aircraft has touched down and to give a slight time lapse before spoiler deployment.

42
Q

A fusible plug fitted to an aircraft wheel prevents.
Option A. over inflation of tyres during servicing.
Option B. brakes seizure, if brake stators and rotors weld together under excessive temperatures.
Option C. tyre bursts due to high temperatures created by excessive braking.

A

Correct Answer is. tyre bursts due to high temperatures created by excessive braking.

43
Q

If the shuttle valve was stuck in the normal position.
Option A. neither system will be available.
Option B. emergency braking will not be available.
Option C. normal braking will not be available.

A

Correct Answer is. emergency braking will not be available.

44
Q

The breaker strip of a tyre is fitted.
Option A. between the apex strip and the casing piles.
Option B. between the bead and the casing piles.
Option C. between the tread rubber and the casing piles.

A

Correct Answer is. between the tread rubber and the casing piles.

45
Q

Nose wheel steering in a modern aircraft is by.
Option A. rudder pedals.
Option B. the control column.
Option C. a separate pilot operated control.

A

Correct Answer is. a separate pilot operated control.

46
Q

The fusible plugs installed in some aircraft wheel will.
Option A. facilitate servicing of the wheel assembly.
Option B. melt at a specified elevated temperature.
Option C. eliminate the need to check air pressure

A

Correct Answer is. melt at a specified elevated temperature.

47
Q

Excessive wear in the shoulder area of an aircraft tyre is an indication of.
Option A. under-inflation.
Option B. over-inflation.
Option C. excessive toe-in.

A

Correct Answer is. under-inflation.

48
Q

Ribbed tyres with marker tie bars may be worn to.
Option A. the top of the tie bar.
Option B. the base of the tie bar.
Option C. 1 mm from the rib base.

A

Correct Answer is. the top of the tie bar.

49
Q

On large aircraft, bogie type undercarriages are used to.
Option A. spread the weight over a large area.
Option B. absorb increased landing shock.
Option C. prevent skidding.

A

Correct Answer is. spread the weight over a large area.

50
Q

To position the bogie beam at a suitable angle for retraction and landing, a.
Option A. castoring damper is used.
Option B. snubber is used.
Option C. hop damper is used.

A

Correct Answer is. hop damper is used.

51
Q

On large aircraft, braked wheel assemblies are normally inflated with.
Option A. nitrogen.
Option B. an argon and CO2 mixture.
Option C. nitrogen and not more than 5% of air.

A

Correct Answer is. nitrogen and not more than 5% of air.

52
Q

Brake deboosters.
Option A. increase the hydraulic pressure entering the brakes.
Option B. reduce the hydraulic pressure entering the brakes.
Option C. assist the operation of the anti-skid unit.

A

Correct Answer is. reduce the hydraulic pressure entering the brake

53
Q

A modulator is fitted in conjunction with.
Option A. brake control valves.
Option B. non-return valve.
Option C. anti-skid units.

A

Correct Answer is. anti-skid units.

54
Q

In the case of pressurized aircraft, the nose-wheel bay.
Option A. is pressurized to a value higher than ambient but less than cabin pressure.
Option B. is subject to cabin pressure.
Option C. is not pressurized.

A

Correct Answer is. is not pressurized.

55
Q

An undercarriage that has the axle mounted directly onto the shock absorber is of which type.
Option A. Articulated.
Option B. Hydro Mechanical.
Option C. Direct Acting.

A

Correct Answer is. Direct Acting.

56
Q

The minimum aquaplaning ground speed is.
Option A. 9.6 times the root square of the tyre pressure in psi.
Option B. 8.6 times the root square of the tyre pressure in psi.
Option C. 8.6 times the tyre pressure in bar.

A

Correct Answer is. 8.6 times the root square of the tyre pressure in psi.

57
Q

Tubed tyres are stored.
Option A. horizontally, up to 4 in total staggering them to prevent distortion of beads.
Option B. horizontally, up to 4 in total in a rack with supporting tubes so each tyre is supported at 2 points.
Option C. horizontally, up to 4 in total with the smallest at the top.

A

Correct Answer is. horizontally, up to 4 in total in a rack with supporting tubes so each tyre is supported at 2 points.

58
Q

On a main landing gear, what is positive camber?.
Option A. Top of wheels closer to fuselage.
Option B. Front of wheels closer to fuselage.
Option C. Bottom of wheels closer to fuselage.

A

Correct Answer is. Bottom of wheels closer to fuselage.

59
Q

When the landing gear is locked up, the cockpit indicator shows.
Option A. red light.
Option B. no indication.
Option C. green light.

A

Correct Answer is. no indication.

60
Q

When checking the alignment of a main landing gear, check.
Option A. symmetry, tracking, camber.
Option B. symmetry, tracking, twist.
Option C. symmetry, tracking, splay.

A

Correct Answer is. symmetry, tracking, camber.

61
Q

Tyre creep could be caused by.
Option A. overpressure.
Option B. excessive wear.
Option C. under pressure.

A

Correct Answer is. under pressure.

62
Q

When inflating a tyre and you notice ice in the valve stem.
Option A. heat the valve stem gently with a blow torch.
Option B. wait for ice to melt before carrying on with inflation.
Option C. carry on inflating as ice in the valve stem is no problem.

A

Correct Answer is. wait for ice to melt before carrying on with inflation.

63
Q

A method of helping to prevent aquaplaning is by fitting tyres which have.
Option A. water dispersing treads.
Option B. a plain tread.
Option C. twin contact.

A

Correct Answer is. water dispersing treads.

64
Q

Un-mounted tubeless tyres must be stored.
Option A. vertically.
Option B. horizontally.
Option C. in the manufactures boxes.

A

Correct Answer is. vertically.

65
Q

With a single oleo leg with a stub axle used, the torque links will.
Option A. keep the wheel in track.
Option B. assist the wheel to castor.
Option C. allow the wheel to shimmy.

A

Correct Answer is. keep the wheel in track.

66
Q

When fitting a tyre to a hub, the red spot on the tyre should be in line with.
Option A. maker’s serial number.
Option B. the valve assembly.
Option C. opposite side to the valve assembly.

A

Correct Answer is. the valve assembly.

67
Q

A red or yellow line on an inner tube would indicate.
Option A. light spot.
Option B. balance indicator.
Option C. heavy spot.

A

Correct Answer is. heavy spot

68
Q

On a multi-brake unit with automatic adjusters, brake wear is checked by.
Option A. using a go-no go gauge to measure the gap between the cylinder and the thrust plate.
Option B. application of the brakes and checking indicator pin protrusion.
Option C. measuring the protrusion of the indicator pins with the brakes released.

A

Correct Answer is. application of the brakes and checking indicator pin protrusion.

Module 11B (42 decks)

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