Landing Gear Brakes Practice Quiz

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 B. insufficient hydraulic fluid in the reservoir C. glazed brake linings

an internal leak in the master cylinder

If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause? A. worn brake lining B. internal leakage in the master cylinder C. deteriorated flexible hoses

deteriorated flexible hoses

Which statement is true with respect to an aircraft equipped with hydraulically operated multiple-disk type brake assemblies? A. there are no minimum or maximum disk clearance checks required due to the use of self-compensating cylinder assemblies B. do not set parking brake when brakes are hot C. no parking brake provisions are possible for this type of brake assembly

do not set parking brake when brake are hot

Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable to mechanical operation? A. single-disk spot type B. single-servo type C. expander-tube type

expander-tube type

When bleeding aircraft brakes, one of the indications that the air has been purged from the system is A. partial brake pedal travel B. full brake pedal travel C. firm brake pedals

firm brake pedals

Power boost brake systems are used on aircraft that have A. high landing speeds B. low normal hydraulic system pressure C. more than one brake assembly per axle

high landing speeds

What would be the effect if the piston return spring broke in a brake master cylinder? A. the brakes would become spongy B. the brake travel would become excessive C. the brakes would drag

the brakes would drag

The pressure source for power brakes is A. the main hydraulic system B. the power brake reservoir C. a master cylinder

the main hydraulic system

Internal leakage in a brake master cylinder unit can cause A. fading brakes B. slow release of brakes C. the pedal to slowly creep down while pedal pressure is applied

the pedal to slowly creep down while pedal pressure is applied

What is one effect a restricted compensator port of a master cylinder will have on a brake system? A. the brakes will operate normally B. the reservoir will be filled by reverse flow C. the restriction will cause slow release of the brakes

the restriction will cause slow release of the brakes

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. a bypass valve B. an orifice check valve C. a shuttle valve

a shuttle valve

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 A. the hydraulic cylinder piston is sticking B. air in the brake hydraulic system C. the hydraulic master cylinder piston return spring is weak

air in the brake hydraulic system

Chines are used on aircraft nose wheel tires to help A. nose gear extension at higher air speeds B. reduce the possibility of hydroplaning C. deflect water away from the fuselage

deflect water away from the fuselage

The fusible plugs installed in some aircraft wheels will A. indicate tire tread separation B. prevent overinflation C. melt at a specified elevated temperature

melt at a specified elevated temperature

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 B. that are used in conjunction with an antiskid system C. that are used on aircraft having high landing speeds

that are designed to work with lower pressue

If a brake debooster is used in a hydraulic brake system, its position in the system will be A. between the pressure manifold of the main hydraulic system and the power brake control valve B. between the brake control valve and the brake actuating cylinder C. in the brake pressure line between the brake pedal and the brake accumulator

between the brake control valve and the brake actuating cylinder

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 B. assists in the master cylinder piston return C. prevents fluid from flowing back to the reservoir

permits the fluid to flow toward or away from the reservoir as temperature changes

Debooster valves are used in brake systems primarily to A. ensure rapid application and release of the brakes B. reduce brake pressure and maintain static pressure C. reduce the pressure and release the brakes rapidly

reduce the pressure and release the brakes rapidly

Debooster cylinders are used in brake systems prmarily to A. reduce brake pressure and maintain static pressure B. relieve excessive fluid and ensure a positive release C. reduce the pressure to the brake and increase the volume of the fluid flow

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

Aircraft brakes requiring a large volume of fluid to operate the brakes generally A. use independent master cylinder systems B. do not use brake system accumulators C. use power brake control valves

use power brake control valves

In brake service work, the term 'bleeding brakes' is the process of A. withdrawing air only from the system B. withdrawing fluid from the system for the purpose of removing air that has entered the system C. replacing small amounts of fluid in reservoir

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

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 A. the master cylinder one-way cup is leaking B. worn brake linings C. worn brake disk causing excessive clearance between the notches on the perimeter of the disk and the spines or keys on the wheel

worn brake linings

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? A. by allowing the brake rotor to float to automatically equalize as pressure is applied to the rotor B. by allowing the caliper to float to automatically equalize as pressure is applied to the rotor C. by allowing the brake linings to automatically equalize as pressure is applied to the rotor

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

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? A. replace both tires B. correct the discrepancy and enter in the aircraft records C. replace the tire with the lowest pressure

correct the discrepancy and enter in the aircraft records

How can it be determined that all air has been purged from a master cylinder brake system? A. by operating a hydraulic unit and watching the system pressure gauge for smooth, full-scale deflection B. by noting whether the brake is firm or spongy C. by noting the amount of fluid return to the master cylinder upon brake release

by noting whether the brake is firm or spongy

The purpose of a relief valve in a brake system is to A. reduce pressure for brake application B. prevent the tire from skidding C. compensate for thermal expansion

compensate for thermal expansion

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 B. excessively worn brake linings C. low fluid supply in the brake system reservoir

foreign particles stuck in the master cylinder compensating port

A pilot reports that the brake pedals have excessive travel. A probable cause is A. weak return springs B. lack of fluid in the brake system C. oil or some foreign matter on the brake rotors and linings

lack of fluid in the brake system