Airframe-M6-Structures & Application

What is the purpose of a compensating port or valve in a brake master cylinder of an independent brake system?

Permits the fluid to flow toward or away from the reservoir as tempurture changes.

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

Straightens the nosewheel.

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

use power brake control valves.

Overinflated aircraft tires may cause damage to the

wheel flange.

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. Solvent.

2,3,4,6,7,8

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.

The braking action of a Cleveland disk brake is accomplished by compressing a rotating brake disk between two oppostie brake linings. How is equal pressure on both sides of the rotating disk assured?

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

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

Deteriorated flexible hoses.

Many brake types can be adapted to operate mechanically or hydraulically, Which type is not adaptable to mechanical operation?

Expander-tube type.

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

Maintain correct wheel alignment.

Why do most aircraft tire manufacturer recommend that the tubes in newly installed tires be first inflated, fully deflated, and then reinflated to the correct pressure?

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

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

air in the brake hydraulic system.

Lockout debooster are primarly pressure reducing valves that

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

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

an idefinite number of times.

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

compensate for thermal expansion.

Chines are used on some aircraft nose wheel tires to help

deflect water away from the fuselage

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.

When an empty shock strut is filled with fluid, care should be taken to extend and compress the strut completly at least two times to

ensure proper packing ring seating and removal of air bubbles.

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

extend the landing gear if the normal operating mechanism fails.

When bleeding aircaft brakes, one of the indications that the air has been purged from the system is

firm brake pedals.

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

fluid level.

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

foreign particles stuck in the master cylinder compenstating port.

Power boost brake systems are used on aircraft that have

high landing speeds.

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

inlet of the steering damper.

A pilot reports that the brake pedals have excessive travel. A probable cause is

lack of fluid in the brake system.

A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to

limit the extension stroke.

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

low fluid.

The fusible plugs installed in some aircraft wheels will

melt at a specific eleveated temperature.

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

overinflation.

The metering pins in oleo shock struts serve to

retard the flow of oil as the struts are compressed.

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

retarded and gear is not down and locked.

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

slippage mark.

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

split field series-wound motor.

If a shock strut bottoms after it has been properly serviced, the

strut should be removed, disassembled, and inspected.

The correct inflation pressure for an aircraft tire can be obtained from

the aircraft service manual

When an 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.

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?

A shuttle valve

On an air valve core stem, what indicates high pressure type?

An embossed letter "H".

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

An internal leak in the master cylinder

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

At least 2 hours (3 hours in hot weather)

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?

Correct the discrepancy and enter in the aircraft records.

What statement is true with respect to an aircraft equiped with hydraulically operated multiple-disc type brake assemblies?

Do not set parking brake when brakes are hot

What would be the effect if the piston return spring broke in a brake master cylinder?

The brake would drag.

What is one effect a restricted compensator port of a master cylinder will have on a brake system?

The restriction will cause slow release of the brakes.

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

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

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

inthe aircraft manufacturer's service manual.

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

make an operational check with the aircraft on jacks.

The best safeguards against heat buildup in aircraft tires are

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

A brake debooster valve is installed in systems where the high pressure of the hydraulic system (3,000 psi) is used to operate brakes

that are designed to work with lower pressure.

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

the direction of fluid pressure

The pressure source for power brakes is

the main hydraulic system.

Internal leakage in a brake master cylinder unit can cause

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

Aircraft tire pressure should be checked

at least once a week or more often.

If a brake debooster is used in a hydraulic brake system, it position in the sytem will be

between the brake control valve and the brake actuating cylinder

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.

The primary purpose for balancing aircraft wheel assemblies is to

prevent heavy spots and reduce vibration.

In shock struts, chevron seals are used to

prevent oil from escaping.

The removal, installation, and repair of landing gear tires by teh holder of a private pilot certificate on an aircraft owned or operated is considered to be

preventive maintenance.

Extension of an oleo shock strut is measured to determine the

proper operating position of the strut.

Debooster valves are used in brake systems primarly to

reduce brake pressure and release the brakes rapidly

Debooster cylinders are used in brake systems primarly to

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

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 a properly operating fusible plug has allowed a tire to deflate, the tire should be

replaced.

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

toe-out

Excessive wear in the shoulder area of an aircraft tire is an indication of

underinflation

The hydraulic packing seals used in a landing gear shock strut are

used only with a specific type of fluid

To prevent a very rapid extension of an oelo shock strut after intitial compression resulting from landing impact

various tyes of valves or orifices are used which restrict the reverse fluid flow.

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.

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.

When servicing an air/oil shock strut with MIL-5606 the strut should be

collapsed and fluid added at the filler opening.

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

worn brake linings.