Aircraft Landing GearExam

What prevents a split wheel from leaking air through the inner and outer mating surfaces, or the wheel assembly?

A rubber o-ring between the two wheel halves

What type of nose wheel steering is provided on small aircraft?

A simple system consisting of mechanical linkage hooked to the rudder pedals

How long should you wait after a flight before checking tire pressure?

At least 3 hours

How can it be determined that all air has been purged from a master cylinder brake system?

By noting whether the brake is firm or spongy

What regular inspection should be made of the exposed portion of a landing gear strut?

Clean and inspect for damage and proper extension.

What is the indication of excessive heating of a wheel bearing?

Discoloration (blue color)

Which statements is true with respect to an aircraft equipped with hydraulically operated multiple disk type brake assemblies?

Do not set parking brake when brakes are hot

What is used to service and air/oil landing gear shock strut?

Dry air or nitrogen, and hydraulic fluid

When should landing gear retraction checks be accomplished?

During an annual or other inspections, when landing gear components have been replaces and after hard landings.

What should be checked when a shock strut bottoms during a landing?

Fluid Level

What power sources are normally used to retract landing gear systems?

Hydraulic, or electrical

Name the common type of brake systems used on aircrafts?

Independant, power boost and power control

What methods are used for transmitting the brake pedal movements to a steering control unit in large aircraft?

Mechanical (cables, linkages), electrical or hydraulic

What prevents a nose landing gear from being retracted with the nose wheel out of the center position.

Nose wheel centering internal cams or external track

What must be accomplished before inspecting a wheel brake system for hydraulic leaks?

Pressurize the system

What is the most important maintenance action for safe, long, aircraft tire service?

Proper tire inflation

Debooster cylinders are used in brake systems primarily to

Reduce pressure for brake application

What unit prevents nose wheel vibration?

Shimmy damper or in large aircraft using power steering , the power steering actuators provide the dampening

What is the function of a cam incorporated in a nose gear shock strut?

Straightens the nosewheel

What is the purpose of main landing gear torque links and arms?

They keep the main landing gear wheels pointed in a straight ahead direction.

What is the purpose of power brake debooster cylinders?

They reduce the pressure to the brakes and increase the volume of fluid flow

What is the purpose of an anti-skid system?

To bring a fast moving aircraft to a stop during ground roll without tire skidding

What is the purpose of a wheel fusible plug?

To relieve air pressure when the tire overheats due to hard braking or extended taxiing to prevent tire blowout.

The purpose of a sequence valve in a hydraulic retractable landing gear system is to

ensure operation of the landing gear and gear doors in the proper order

On all aircraft equipped with retractable landing gear, some means must be provided to

extend the landing gear if the normal operating mechanism fails

What are some methods of bleeding brakes?

gravity and pressure methods

Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found

in the aircraft manufacturers service manual

Excessive wear in the center of the tread of an aircraft tire is an indication of

over inflation

The primary purpose for balancing aircraft wheel assemblies is to

prevent heavy spots and reduce vibration

What are the effects of under inflation on tires?

rapid or uneven wear near the edge of tread and creep/slip when brakes are applied

The purpose of a relief valve in a brake system is to

reduce pressure for brake application

On most aircraft, the oil level of an air and oil shock strut is checked by

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

When air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by

the fluid being forced through a metered opening

The pressure source for power brakes is

the main hydraulic system

Aircraft brakes requiring a large volume of fluid to operate the brakes generally

use power brake control valves

to prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact

various types of valves or orifices are used with restrict the reverse fluid flow

Overinflated aircraft tires may cause damage to the

wheel flange

In brake service work, the term bleeding brakes is the process of

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

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

2,34,6,7,8

What type of material is used for modern brake rotors on transport category aircraft?

Carbon Brakes

A high speed aircraft tire with a sound cord body and bead may be recapped:

an indefinite number of times

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

as a safety precaution in case the bolts that hold the wheel halves together have been damaged or weakened

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

center the nosewheel before it enters the wheel well

What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo struts?

maintain correct wheel alignment

After performing maintenance on an aircraft's landing gear system which may have affected the system's operation, it is necessary to

make an operational check with the aircraft on jacks

The fusible plugs installed in some aircraft wheels will

melt at a specified elevated temperature

The metering pins in oleo shock struts serve to

retard the flow of oil as the struts are compressed

a landing gear position and warning system will provide a warning in the cockpit when the throttle is

retarded and gear is not down and locked

The best safeguards against heat buildup in aircraft tires are

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

An electric motor used to raise and lower a landing gear would most likely be a

split field series wound motor