Mod 16, Unit 2, Quiz 4, Hydraulic Subsystems

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

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

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 of pressure

an internal leak in the master cylinder

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

Aircraft tire pressure should be checked

at least once a week or more often

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

expander tube type

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

extend the landing gear if the normal operating mechanism fails

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

limit the extension stroke

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

maintain correct wheel alignment

After performing maintenance on an aircrafts landing gear system which may have affected the systems operation, it is usually necessary to

make an operational check with the aircraft on jacks

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

prevenative maintenance

Debooster valves are used in brake systems primarily to

reduce the pressure and release the brakes rapidly

The metering pins in oleo struts serve to

retard the flow of oil as the struts are compressed

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

slippage mark

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

that are designed to work with lower pressure

When an air/oil type of landing gear shock strut is used, the inital 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

Internal leakage in a brake master cylinder unit can cause

the pedal to slowly creep down while pedal pressure is applied

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

the restriction will cause slow release of the brakes

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

to allow the tube to position itself correctly inside the tire

The braking action of a clevland 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

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

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

collapsed and fluid added at the filler opening

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

compensate for thermal expansion

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

Which statement 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

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 bleeding aircraft brakes one of the indications that the air has been purged from the system is

firm brake pedals

Power boost brake systems are used on aircraft that have

high landing speeds

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

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

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 ehich 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