A&P Landing Gear

50 (8354) - What should be checked when a shock strut bottoms during a landing?

C- Fluid level.

25 (8329) - What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut?

C- Maintain correct wheel alignment.

72 (8376) - What device in a hydraulic system with a constant-delivery pump allows circulation of the fluid when no demands are on the system?

C- Pressure regulator.

2 (8306) - What would be the effect if the piston return spring broke in a brake master cylinder?

C- The brakes would drag.

28 (8332) - What is one effect a restricted compensator port of a master cylinder will have on a brake system?

C- The restriction will cause slow release of the brakes.

47 (8351) - A high-speed aircraft tire with a sound cord body and bead may be recapped

C- an indefinite number of times.

71 (8375) - Nose gear centering cams are used in many retractable landing gear systems. The primary purpose of the centering device is to

C- center the nosewheel before it enters the wheel well.

38 (8342) - The purpose of a relief valve in a brake system is to

C- compensate for thermal expansion.

57 (8361) - Chines are used on some aircraft nose wheel tires to help

C- deflect water away from the fuselage.

32 (8336) - The purpose of a sequence valve in a hydraulic retractable landing gear system is to

C- ensure operation of the landing gear and gear doors in the proper order.

64 (8368) - When an empty shock strut is filled with fluid, care should be taken to extend and compress the strut completely at least two times to

C- ensure proper packing ring seating and removal of air bubbles.

16 (8320) - When bleeding aircraft brakes, one of the indications that the air has been purged from the system is

C- firm brake pedals.

37 (8341) - Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found

C- in the aircraft manufacturer's service manual.

9 (8313) - After performing maintenance on an aircraft's landing gear system which may have affected the system's operation, it is usually necessary to

C- make an operational check with the aircraft on jacks.

59 (8363) - The fusible plugs installed in some aircraft wheels will

C- melt at a specified elevated temperature.

78 (8382) - A filter incorporating specially treated cellulose paper is identified as a

C- micronic filter.

63 (8367) - Excessive wear in the center of the tread of an aircraft tire is an indication of

C- overinflation.

26 (8330) - The removal, installation, and repair of landing gear tires by the holder of a private pilot certificate on an aircraft owned or operated is considered to be

C- preventive maintenance.

44 (8348) - Extension of an oleo shock strut is measured to determine the

C- proper operating position of the strut.

18 (8322) - Debooster valves are used in brake systems primarily to

C- reduce the pressure and release the brakes rapidly.

45 (8349) - Debooster cylinders are used in brake systems primarily to

C- reduce the pressure to the brake and increase the volume of fluid flow.

66 (8370) - On most aircraft, the oil level of an air and oil shock strut is checked by

C- releasing the air and seeing that the oil is to the level of the filler plug.

69 (8373) - An electric motor used to raise and lower a landing gear would most likely be a

C- split field series-wound motor.

46 (8350) - If a shock strut bottoms after it has been properly serviced, the

C- strut should be removed, disassembled, and inspected.

70 (8374) - When installing a chevron-type seal in an aircraft hydraulic cylinder, the open side of the seal should face

C- the direction of fluid pressure.

30 (8334) - Internal leakage in a brake master cylinder unit can cause

C- the pedal to slowly creep down while pedal pressure is applied.

62 (8366) - Excessive wear in the shoulder area of an aircraft tire is an indication of

C- underinflation.

27 (8331) - Aircraft brakes requiring a large volume of fluid to operate the brakes generally

C- use power brake control valves.

54 (8358) - The hydraulic packing seals used in a landing gear shock strut are

C- used only with a specific type of fluid.

17 (8321) - Overinflated aircraft tires may cause damage to the

C- wheel flange.

61 (8365) - How long should you wait after a flight before checking tire pressure?

A- At least 2 hours (3 hours in hot weather).

41 (8345) - What is the purpose of a compensating port or valve in a brake master cylinder of an independent brake system?

A- Permits the fluid to flow toward or away from the reservoir as temperature changes.

7 (8311) - Why do most aircraft tire manufacturers recommend that the tubes in newly installed tires be first inflated, fully deflated, and then reinflated to the correct pressure?

A- To allow the tube to position itself correctly inside the tire.

76 (8380) - An O-ring intended for use in a hydraulic system using MIL-H-5606 (mineral base) fluid will be marked with

A- a blue stripe or dot.

55 (8359) - Lockout deboosters are primarily pressure reducing valves that

A- allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber.

36 (8340) - When servicing an air/oil shock strut with MIL-5606 the strut should be

A- collapsed and fluid added at the filler opening.

52 (8356) - The left brake is dragging excessively on an airplane on which no recent brake service work has been performed. The most probable cause is

A- foreign particles stuck in the master cylinder compensating port.

22 (8326) - Power boost brake systems are used on aircraft that have

A- high landing speeds.

75 (8379) - A hydraulic hose identified as MIL-H-8794 will have a yellow stripe running the length of the hose. This stripe

A- is used to ensure that the hose is installed without excessive twisting.

42 (8346) - If an aircraft shock strut (air/oil type) bottoms upon initial landing contact, but functions correctly during taxi, the most probable cause is

A- low fluid.

21 (8325) - The primary purpose for balancing aircraft wheel assemblies is to

A- prevent heavy spots and reduce vibration.

56 (8360) - When a properly operating fusible plug has allowed a tire to deflate, the tire should be

A- replaced.

68 (8372) - A landing gear position and warning system will provide a warning in the cockpit when the throttle is

A- retarded and gear is not down and locked.

15 (8319) - A stripe or mark applied to a wheel rim and extending onto the sidewall of a tube-type tire is a

A- slippage mark.

14 (8318) - A brake debooster valve is installed in systems where the high pressure of the hydraulic system (3000 psi) is used to operate brakes

A- that are designed to work with lower pressure.

33 (8337) - The pressure source for power brakes is

A- the main hydraulic system.

40 (8344) - If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, the wheels can be termed as having

A- toe-out.

4 (8308) - To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact,

A- various types of valves or orifices are used which restrict the reverse fluid flow.

73 (8377) - A fully-charged hydraulic accumulator provides

B- a source for additional hydraulic power when heavy demands are placed on the system.

5 (8309) - A pilot reports the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cause is

B- air in the brake hydraulic system.

39 (8343) - Aircraft tire pressure should be checked

B- at least once a week or more often.

53 (8357) - If a brake debooster is used in a hydraulic brake system, its position in the system will be

B- between the brake control valve and the brake actuating cylinder.

23 (8327) - On all aircraft equipped with retractable landing gear, some means must be provided to

B- extend the landing gear if the normal operating mechanism fails.

74 (8378) - A hydraulic system referred to as a 'power pack' system will

B- have all hydraulic power components located in one unit.

24 (8328) - An automatic damping action occurs at the steering damper if for any reason the flow of high-pressure fluid is removed from the

B- inlet of the steering damper.

19 (8323) - The repair for an out-of-tolerance toe-in condition of main landing gear wheels determined not to be the result of bent or twisted components consists of

B- inserting, removing, or changing the location of washers or spacers at the center pivotal point of the scissor torque links.

67 (8371) - A pilot reports that the brake pedals have excessive travel. A probable cause is

B- lack of fluid in the brake system.

31 (8335) - A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to

B- limit the extension stroke.

65 (8369) - In shock struts, chevron seals are used to

B- prevent oil from escaping.

79 (8383) - The purpose of an orifice check valve is to

B- restrict flow in one direction and allow free flow in the other.

8 (8312) - The metering pins in oleo shock struts serve to

B- retard the flow of oil as the struts are compressed.

58 (8362) - The best safeguards against heat buildup in aircraft tires are

B- short ground rolls, slow taxi speeds, minimum braking, and proper tire inflation.

49 (8353) - The correct inflation pressure for an aircraft tire can be obtained from

B- the aircraft service manual.

29 (8333) - When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by

B- the fluid being forced through a metered opening.

3 (8307) - In brake service work, the term 'bleeding brakes' is the process of

B- withdrawing fluid from the system for the purpose of removing air that has entered the system.

48 (8352) - If an airplane equipped with master cylinders and single-disk brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is

B- worn brake linings.

80 (8384) - (Refer to Figure 10.) The trunnion nut on an aircraft landing gear requires a torque of 320 inch-pounds. To reach the nut, a 2-inch straight adapter must be used on an 18-inch torque wrench. How many foot-pounds will be indicated on the torque wrench when the required torque of the nut is reached?

A- 24

6 (8310) - Aside from an external leak in the line, what will cause parking brakes to continually bleed off pressure?

A- An internal leak in the master cylinder.

43 (8347) - What is the function of a cam incorporated in a nose gear shock strut?

B- Straightens the nosewheel.

10 (8314) - Why do tire and wheel manufacturers often recommend that the tires on split rim wheels be deflated before removing the wheel from the axle?

B- As a safety precaution in case the bolts that hold the wheel halves together have been damaged or weakened.

11 (8315) - The braking action of a Cleveland disk brake is accomplished by compressing a rotating brake disk between two opposite brake linings. How is equal pressure on both sides of the rotating disk assured?

B- By allowing the caliper to float to automatically equalize as pressure is applied to the rotor.

51 (8355) - How can it be determined that all air has been purged from a master cylinder brake system?

B- By noting whether the brake is firm or spongy.

60 (8364) - What action, if any, should be taken when there is a difference of more than 5 pounds of air pressure in tires mounted as duals?

B- Correct the discrepancy and enter in the aircraft records.

34 (8338) - Which statement is true with respect to an aircraft equipped with hydraulically operated multiple-disk type brake assemblies?

B- Do not set parking brake when brakes are hot.

77 (8381) - What condition would most likely cause excessive fluctuation of the pressure gauge when the hydraulic pump is operating?

B- Inadequate supply of fluid.

1 (8305) - Exposure to and/or storage near which of the following is considered harmful to aircraft tires?1. Low humidity.2. Fuel.3. Oil.4. Ozone.5. Helium.6. Electrical equipment.7. Hydraulic fluid.8. Solvents.

C- 2, 3, 4, 6, 7, 8.

81 (8385) - A special bolt in a landing gear attachment requires a torque value of 440 inch-pounds. How many foot-pounds are required?

C- 36.6.

35 (8339) - What type of valve is used in the brake actuating line to isolate the emergency brake system from the normal power brake control valve system?

C- A shuttle valve.

20 (8324) - On an air valve core stem, what indicates high-pressure type?

C- An embossed letter 'H.'

12 (8316) - If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause?

C- Deteriorated flexible hoses.

13 (8317) - Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable to mechanical operation?

C- Expander-tube type.