Aircraft Systems 2 Lesson 4 MQF

A spring steel landing gear _________________ (does or does not) absorb shock.

does not

An air-oil oleo shock strut absorbs the energy from the initial landing impact with the ____________ (air or oil).

oil

The opposition to the landing impact is gradually increased in an oleo shock strut by a tapered _____________________ decreasing the size of the orifice.

metering pan

An air-oil oleo shock strut absorbs taxi shocks with the ____________ (air or oil).

air

A spring-oil shock strut absorbs taxi shocks with the _______________ (spring or oil).

spring

Rebound is minimized with an oleo shock strut by restricting the flow of oil by the closing of the ________________ valve.

flapper

Two places in which you can find the specification number for the proper fluid to use to service an oleo shock strut are:

a. aircraft maintenance manual

b. placard attached to shock strut

An oleo shock strut can be charged with high-pressure compressed air or with _________________ .

nitrogen

The correct amount of air in an oleo shock strut is measured by the __________________ of the strut.

extension

If the main wheels of an airplane are closer together at the front than at the rear, the landing gear is toed ___________ (in or out).

in

If the top of the main wheel of an airplane tilts outward, the wheel has a _________________ (positive or negative) camber.

positive

The wheels of an airplane equipped with a spring steel landing gear are aligned by adding shims between the ___________________________ and the _____________ .

landing gear strut, axle

The wheels of an airplane equipped with an oleo shock absorber are aligned by adding shims between the _________________________ .

torque link arms

When a large transport category airplane is not being steered on the ground, the nose gear steering cylinders act as _______________________ .

shimmy dampers

An airplane with a castering nose wheel is steered by differential use of the _______________ .

brakes

A retractable nose wheel is prevented from being retracted when it is not straight ahead by a/an ______________________ in the nose gear oleo strut.

centering cam

Four methods of actuating a retractable landing gear are:

a. mechanical

b. electric motors

c. hydraulic actuators

d. pneumatic actuators

A hydraulic system that has the reservoir, pump, and valves in a single easy-to-service unit is called a/an ___________________ system.

power pack

The mechanically operated valve that prevents the landing gear actuator from lowering the main gear before the wheel well doors are open is called a/an _________________ valve.

sequence

Emergency actuation of the landing gear of some small airplanes consists of opening the free-fall valve between the landing gear ________________ and the __________________ and allowing the gear to free fall from the wheel wells.

up line, down line

Two gases that may be used for the emergency backup system for a hydraulically actuated landing gear are compressed ____________ and _________________ .

air, nitrogen

When a landing gear is extended by the emergency system, compressed air or nitrogen is directed into the actuating cylinder through a/an ________________ valve.

shuttle

A brake that uses friction to help apply the brakes is called a/an ___________________ brake.

energizing

An expander tube brake is a/an ______________________ (energizing or non-energizing) brake.

non-energizing

Clearance between the drum and the blocks of an expander tube brake is maintained constant by an automatic adjuster which traps a certain amount of hydraulic fluid in the ______________________ .

expander tube

Fading of a drum-type brake is caused by uneven __________________ of the drum caused by heat.

expansion

A single-disk brake _______________ (is or is not) an energizing brake.

is not

An automatic adjuster in a single-disk brake determines the amount the piston moves when the brakes are _________________ (applied or released).

released

The amount of lining wear is indicated on a single-disk brake with automatic adjusters by the amount the adjusting pin protrudes from the nut. The more the linings are worn, the _____________ (more or less) the pin protrudes.

less

Brake lining wear is measured on a single-disk brake without automatic adjusters by measuring the distance between the disk and the _______________ (piston or anvil) side of the brake housing.

piston

A dual-disk brake is similar to a single-disk except for the additional braking area furnished by the additional disk and _______________ area.

lining

One of the main limitations of a thin-disk multiple-disk brake is the tendency of the disks to _____________ .

warp

The brake linings in a segmented-rotor brake are part of the _______________ (rotor or stator).

stator

In a segmented-rotor brake, the disks are squeezed between the _______________________ and the ______________________ .

pressure plate, backing plate

Carbon-disk brakes are ________________ (heavier or lighter) than a metal-disk brake that has the same stopping capability.

lighter

The fluid in the brake wheel cylinder is vented to the atmosphere through the _____________________ port in the master cylinder.

compensating

If the compensator port were plugged, expansion of the fluid in the brake lines caused by heat would cause the brakes to _____________ .

drag

The brake system that uses the aircraft hydraulic system pressure to assist the pilot in applying force to the piston in the brake master cylinder is called a/an ________________ brake.

boosted

A power brake control valve is a form of pressure __________________ .

regulator

For maximum braking effectiveness, the wheels of an airplane should be allowed to _____________ but not allowed to _____________ .

slip, skid

When an airplane wheel locks up on a wet runway and the tire skids across the surface of the water, the tire is said to be _____________________ .

hydroplaning

The three major components in an antiskid brake system are:

a. wheel-speed sensors

b. control boxes

c. antiskid control valves

When the antiskid system is operating normally, it _______________ (is or is not) possible to land with the brakes applied.

is not

Pressure in the brake cylinders is maintained at a value just below that which would cause the tires to skid by the __________________ circuit in the antiskid control box.

modulator

The wheel-speed sensor in an antiskid system is a small _____________________ .

DC generator

A brake de-booster valve __________________ (increases or decreases) the volume of fluid flowing to the brake.

increases

A lockout de-booster acts as a hydraulic _____________ .

fuse

The emergency brake system of a jet transport airplane uses _________________ to actuate the brakes.

nitrogen

Two causes of disk brakes chattering or squealing are the disks being _______________ or _______________ .

warped, glazed

Brake cylinder seals that have been overheated should be _________________ .

replaced

Warped brake disks will cause a brake to drag. This will cause the brakes to _________________ .

overheat

A brake housing can be checked for hidden damage from overheating by giving it a _________________ test.

hardness

Two methods of bleeding aircraft brakes are:

a. gravity

b. pressure

Power brakes are bled by the ________________ method.

gravity

Most of the wheels used on modern aircraft are of the ________________ (single-piece or two-piece) type.

two-piece

Wheels on modern high-performance airplanes are prevented from exploding from heat generated in the brakes by ______________________ installed in the inboard wheel half.

fusible plugs

The most highly stressed part of an aircraft wheel is the _______________________ .

bead seat area

The bead seat area of a wheel is strengthened against tensile loads by pre-stressing the surface with a ____________________ stress.

compressive

A wheel should be cleaned with _______________ or ________________ and dried with compressed air.

varsol, naphtha

The dye penetrant method of inspection _______________ (is or is not) an effective method of inspection for the bead seat area of a wheel.

is not

The bead seat area of a wheel should be inspected by the _____________________ method.

eddy current

An aircraft tire is designed to flex, or deflect, _____________ (more or less) than an automobile or truck tire.

more

The body of an aircraft tire is called the ________________ .

carcass

A four-ply rating tire _________________ (does or does not) necessarily have four plies of fabric.

does not

The bundles of high-strength steel wires that are molded into a tire are called the _____________ .

beads

The threads in the plies of a tire cross the threads in adjacent plies at an angle of approximately ___________ degrees.

90

The inner liner of a tubeless tire is ________________ (smoother or rougher) than that used in a tube-type tire.

rougher

The tread design used on most modern aircraft tires is the ____________ tread.

rib

Nose wheel tires used on jet airplanes with engines mounted on the aft fuselage have a __________________ or ______________ molded into their outer sidewall.

deflector, chine

Small holes in the sidewall of a tubeless tire are called _____________ holes.

vent

The correct tire inflation pressure to use is that which is recommended in the _________________ (aircraft or tire) manufacturer’s service manual.

aircraft

The tire inflation pressure specified by the aircraft manufacturer is the pressure in the tire when the tire ___________ (is or is not) supporting the weight of the aircraft.

is

The inflation pressure of a tire should not be measured until the tire has been able to cool down for __________ to __________ hours after flight.

2, 3

The most accurate type of pressure gage to use for measuring tire inflation pressure is a _____________-type gage.

dial

The air pressure inside a tire changes with the temperature. The pressure will increase approximately 1% for each __________ ° F rise in temperature.

5

Inflation pressure will increase by approximately __________ -% when the weight of the aircraft is on the tire.

4

The inflation pressure of newly mounted nylon tires will decrease within the first day or so in service. This decrease is caused by the tire ___________________ .

stretching

Tires should be removed for retreading when the tread groove wears to a depth of __________ inch at the shallowest point.

1/32

A tire with the tread worn more in the middle than on the shoulders has been operated _____________________ (underinflated or overinflated).

overinflated

A tire with the tread worn more on the shoulders than in the middle has been operated ______________________ (underinflated or overinflated).

underinflated

Some air is allowed to seep through the inner lining of a tubeless tire and escape through vents in the sidewall rubber. As much as __________ % of the inflation pressure is allowed to seep out in a 24-hour period.

5

A burned area on a tire tread that indicates the tire has been hydroplaning ___________ (is or is not) cause for removing the tire.

is

A tire should be removed from service if a cut extends across more than __________ of the width of a tread rib.

1/2

A shop tool that may be used to break a tire bead away from the wheel is a/an ____________________ .

arbor press

A tire that has been involved in an aborted takeoff _______________ (is or is not) safe for continued use.

is not

A tire in a dual installation whose mate has failed should be _________________ .

replaced

A kinked bead in a tire ___________ (is or is not) a cause for rejecting the tire.

is

Exposed ply cords in the sidewall of an aircraft tire ___________ (is or is not) cause for rejection of the tire.

is

The FAA _________________ (does or does not) specify the number of times an aircraft tire can be retreaded.

does not

Aircraft tires should be stored ___________________ (horizontally or vertically) whenever possible.

vertically

The red dot on an aircraft tire identifies the ______________ (light or heavy) point of the tire.

light

The yellow mark on an aircraft tube identifies the ______________ (light or heavy) point of the tube.

heavy

The valve of an aircraft tube should stick out on the side of the tire that _____________ (does or does not) have the serial number.

does

The only lubricant approved for use between a tube and a tire is ____________________ .

tire talcum

When a retreaded tire is installed on an airplane with a retractable landing gear, a ___________________ test should be performed on the airplane.

retraction