landing gear

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

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

To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact,. various types of valves of orifices are used wich restrct the reverse fluid flow. the mettering pin gradually reduces the size of the orifice as the shock strut exteds. the air is forced throught a restricted orifice in the reverse direction.

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

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. insuficiend hydraulic fluid in the reservoir. glazed brake linings.

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. to eliminate all the air between the tibe and the inside of the tire. test the entire assembly for leaks.

The metering pins in oleo shock struts serve to. lock the strucs in the down position. retard the flow of oil as the struts are compressed. meter a propper amound of air in the struts.

After performing maintenance on an aircraft's landing gear system which may have affected the system's operation, it is usually necessary to. conduct a flight test. re-inspect the area after the firts flight. make and operational check wiyh the aircraft in jacks.

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?. by allowing brake rotor to float 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. by allowing the brake linningsto 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?. worn brake lining. internal leakage in the master cylinder. deteriorated flexible hoses.

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

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. that are used in conjunction with an antiskid system. that are use in an aircraft having high landind speeds.

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

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

Overinflated aircraft tires may cause damage to the. brake linings. wheel hub. wheel flange.

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

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. shimming the axle in the oleo trunnion. inserting, removing or changing the location of washers or spacers at the center pivotal point of the scisor torque links. placing shims or spacers behind the bearingof the out of tolerance wheel or wheels.

On an air valve core stem, what indicates high-pressure type?. an embossed letter NP. an embossed letter HP. an embossed letter H.

The primary purpose for balancing aircraft wheel assemblies is to. ´prevent heavy spots and reduce vibration. ditribute the aircraft weight properly. reduce excesive wear and turbulence.

Power boost brake systems are used on aircraft that have. high landing speeds. low normal hydraulic pressure. more than one brake asembly per axle.

On all aircraft equipped with retractable landing gear, some means must be provided to. retract and extend the the landing gear if the normal operating mechanism fails. extend the landing gear if the normal operating mechanism fails. prevent the throttle from being reduced below a safe power setting while teh landing gear is retracted.

An automatic damping action occurs at the steering damper if for any reason the flow of high-pressure fluid is removed from the. outlet of the steering damper. inlet of the stering damper. replenishing check valve.

What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut?. limit compression stroke. hold the strut in place. mantain correct alignment.

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. a violation of the federal aviation regulations. a minor repair. preventive mantenaince.

Aircraft brakes requiring a large volume of fluid to operate the brakes generally. use independent master cylinder systems. do notuse brake system accumaulators. use power brake control valves.

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

When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by. compression of the air charge. the fluid being force throught a metered opening. compression of the fluid.

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

A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to. limit the extension of the torque arm. limit the extension stroke. reduce the rebound effect.

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

The purpose of a sequence valve in a hydraulic retractable landing gear system is to. prevent heavy landing gear from falling to rapidly upon extension. provide a mean of disconnecting the normal soure of hydraulic power and connecting the emergency source of power. ensure operation of the landing gear and gear doors in the proper order.

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

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

A shuttle valve is used in a brake system to isolate the emergency brake system from the normal power-brake control valve system. colapsed and fluid added at the filler opening. fully extended and fluid added at the filler opening. partially extended and fluid added at the filler opening.

Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found. on the airplane data plate. in the aircraft operations limitations. in the aircraft manofacturer´s service manual.

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

Aircraft tire pressure should be checked. using only a push on stick-type gauge having 1 pound increments. at least once a week or more often. as soon as posible after each flight.

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. toe-in. negative camber.

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 temperatures change. assist in the master cylinder piston return. prevents fluids from flowing back to the reservoir.

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. low air charge.

What is the function of a cam incorporated in a nose gear shock strut?. provides an internal shimmy damper. straightens the nosewheel.

Extension of an oleo shock strut is measured to determine the. amount of oil in the strut. proper operating position of the strut.

Debooster cylinders are used in brake systems primarily to. reduce brake pressure and maintain the static pressure. reduce the pressure to the brake and increase the volume of fluid flow.

If a shock strut bottoms after it has been properly serviced, the. strut should be removed disassembled and inspected. air pressure should be increased.

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. the master cylinder one way cup is leaking. worn brake linings.

The correct inflation pressure for an aircraft tire can be obtained from. the information stamped in the aircraft wheel. the aircraft service manual.

What should be checked when a shock strut bottoms during a landing?. air pressure. fluid level.

How can it be determined that all air has been purged from a master cylinder brake system?. by noting the amound of fluid return to the master cylinder upon brake released. by noting whether the brake is firm or spongy.

The left brake is dragging excessively on an airplane on which no recent brake service work has been performed. The most probable cause is. foreing particles stucki in teh master cylinder compensating port. excesively worn brake linings.

If a brake debooster is used in a hydraulic brake system, its position in the system will be. in the brake pressure line between the brake pedal and the brake accumulator. between the brake control valve and the brake actuating cylinder.

The hydraulic packing seals used in a landing gear shock strut are. used only with a specific type of fluid. kept from direct contacwith fluid by teflon or nylon bakup rings.

Lockout deboosters are primarily pressure reducing valves that. allow full deboosters pistons travelwithout fluid from the high pressure side entering the low pressure chamber. must be blee separatelyafter blade bledding has been complete.

When a properly operating fusible plug has allowed a tire to deflate, the tire should be. replaced. externally inspected for damage.

Chines are used on some aircraft nose wheel tires to help. deflect water away from the fuselage. nose gear extension a higher air speed.

The best safeguards against heat buildup in aircraft tires are. short ground rolls, slow taxy speed,minimum braking and proper tire inflation. minimum braking , proper tire inflation and long ground rolls.

The fusible plugs installed in some aircraft wheels will. melt at especified elevated temperature. prevent overinflation.

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. repalce both tires.

How long should you wait after a flight before checking tire pressure?. at least 2 hours (3hours in hot weather). at least 4 hours (5hours in hot weather).

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

Excessive wear in the center of the tread of an aircraft tire is an indication of. overinflation. incorrect camber.

When an empty shock strut is filled with fluid, care should be taken to extend and compress the strut completely at least two times to. ensure proper packing ring seating and removal of air bubbles. force out any excess fluid.

In shock struts, chevron seals are used to. prevent oil from scaping. serve as a bearing surface.

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. removing the oil filler plug and inserting a gauge.

A pilot reports that the brake pedals have excessive travel. A probable cause is. lack of fluid in the brake system. weak return springs.

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. retrded and gear is down and locked.

An electric motor used to raise and lower a landing gear would most likely be a. split field series wound motor. shunt field series wound motor.

When installing a chevron-type seal in an aircraft hydraulic cylinder, the open side of the seal should face. the direction of fluid pressure. opossite the direction of fluid pressure.

A fully-charged hydraulic accumulator provides. a source for aditional hydraulic power when heavy demands are placed on the system. positive fluid flow to the pump inlet.

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

An air-oil oleo shock strut absorbs the energy from the initial landing impact with the ______. oil. air.

The opposition to the landing impact is gradually increased in an oleo shock strut by a tapered__________ decreasing the size of the orifice. metering pin. round pin.

An air-oil oleo shock strut absorbs taxi shocks with the ______. air. oil.

A spring-oil shock strut absorbs taxi shocks with the _______. spring. oil.

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

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 strut. a. aircraft maintenance manual b. service boletin.

An oleo shock strut can be charged with high-pressure compressed air or with ______________. nitrogen. oxigen.

The conect amount of air in an oleo shock strut is measured by the ________________ of the strut. . extension. retraction.

10. If the main wheels of an airplane are closer together at the front than at the rear, the landing gear is toed__________. in. out.

11. If the top of the main wheel of an airplane tilts outward, the wheel has a ______________ camber. positive. negative.

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. strut- tire.

The wheels of an airplane equipped with an oleo shock absorber are aligned by adding shims between the _____________________ . torgue link arms. torque pins arms.

When a large transport category airplane is not being steered on the ground, the nose gear steering cylinders act as_____________________ . shimmy dampers. control dampers.

An airplane with a castering nose wheel is steered by differential use of the ____________. brakes. spoilers.

A retractable nose wheel is prevented fro m being retracted when it is not straight ahead by a/an___________ in the nose gear oleo strut. centering cam. desentred cam.

Four methods of actuating a retractable landing gear are: a. mechanical b. electric motors c. hydraulic actuators d. pneumatic actuators. a. hands strong 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. principal.

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. shuttle.

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. down line up line.

Two gases that may be used for the emergency backup system for a hydraulically actuated landing gear are compressed _______________ and ____________ . air-nitrogen. air- argom.

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. orifice.

a brake that uses friction to help apply the brakes is called a/an_________. energizing. nonenergizing.

an expander tube brake is a/an. nonenergizing. friction.

clearance between the drums and the blocks of an expander tube brake is mantained constand by an automatic adjuster wich trap a certain amound of hydraulic fluid in the _______. expander tube. accumulator.

fading of a drum-type brake is caused by uneven ______ of the drum caused by heat. expansion. contraction.

a single disk brake______ an energizing brake. is. is not.

the amound of lining wear is indicated on a single disk brake with automatic adjusters by the amound the adjusters pin protrudes from the nut the more the linings are worn, the________ the pin protrudes. less. more.

brake lining wear is measured in a single disk brake without automatic adjusters by measuring the distance between the disk and the_______ side of the brake housing. piston. anvil.

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

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

The brake linings in a segmented-rotor brake are part of the _____________. rotor. stator.

In a segmented-rotor brake, the disks are squeezed between the _____________________ and the __________________ . pressure plate, backing plate. backing plate, backing blade.

35. Carbon-disk brakes are ______________ than a metal-disk brake that has the same stopping capability. heavier. lighter.

The fluid in the brake wheel cylinder is vented to the atmosphere through the _________________ _ port in the master cy linder. compensating. relief.

lf the compensator port were plugged, expansion of the Ouid in the brake lines caused by heat would cause the brakes to ______________ . drag. friction.

The brake system that uses the aircraft hydraulic system pressure to assist the pil ot in applying force to the piston in the brake master cylinder is called a/an _________________brake. boosted. deboosted.

A power brake control valve is a form of pressure ________________. regulator. accumulator.

For maximum braking effectiveness, the wheels of an airplane should be allowed to ___________ but not allowed to_______. slip, skid. slip, roll.

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

The three major components in an antiskid brake system are: a. wheel-speed sensors b. control boxes c. antiskid control valves. a. wheel-speed sensors b. control sensors c. antiskid control valves.

When the antiskid system is operating normally, it _____________ possible to land withthe brakes applied. is. 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. regulator.

The wheel-speed sensor in an antiskid system is a small __________ . DC generator. AC generator.

A brake debooster valve ________ the volume of fluid flowing to the brake. increases. decreases.

A lockout debooster acts as a hydraulic ______ . fuse. breaker.

The emergency brake system of a jet transport airplane uses ________ to actuate the brakes. nitrogen. O2.

Two causes of disk brakes chattering or squealing are the disks being _______ or ______ . warped, glazed. warping, glazed.

Brake cylinder seals that have been overheated should be ________. replaced. serviced.

Warped brake di sks will cause a brake to drag. This will cause the brakes to ________. overheat. overcooled.

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

Two methods of bleeding aircraft brakes are: a. gravity b. pressure. a. temperature b. pressure.

Power brakes are bled by the _______ method. gravity. pressure.

Most of the wheels used on modern aircraft are of the ________ type. single-piece. 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. relief plugs.

The most highly stressed part or an aircraft wheel is the ___________. .bead seat area. top seat area.

The bead seat area of a wheel is strengthened against tensile loads by prestressing the surface with a __________ stress. compressive. noncompressive.

A wheel should be cleaned with _______ or _______ and dried with compressed air. varsol, naphtha. varsol, oil.

The dye penetrant method of inspection_____________________ an effective method of inspection for the bead seat area of a wheel. is. is not.

The bead seat area of a wheel should be inspected by the ____________method. eddy current. corriente de Foucault.

An aircraft tire is des igned to fl ex, or deflect, ______ than an automobile or trucktire. more. less.

The body of an aircraft tire is called the _______. carcass. housing.

A four-ply rating tire ________ necessarily have four plies of fabric. does. does not.

The bundles of hi gh-strength steel wires that are molded into a tire are called the ______. beads. pins.

The threads in the plies of a tire cross the threads in adjacent plies at an angle of approximately_____ degrees. 90. 15.

The inner liner of a tubeless tire is ________ than that used in a tubetype tire. smoother. rougher.

The tread design used on most modern aircraft tires is the ______ tread. rib. nut.

Nose wheel tires used on jet airplanes with engines mounted on the aft fuse lage have a_________ or __________molded into their outer sidewall. deflector, chine. deflector, pine.

Small holes in the sidewall of a tubeless tire are called ______________ holes. vent. scape.

The correct tire inflation pressure to use is that which is recommended in the _______ manufacturer's service manual. aircraft. tire.

The tire infl ation pressure specified by the aircraft manufacturer is the pressure in the tire when the tire _____ supporting the weight of the aircraft. is not. 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. 5,6.

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

The air pressure inside a tire changes with the temperature. The pressure will increase approximately 1% for each _____________°F rise in temperature. 5. 2.

Inflation pressure will increase by approximately _____ -% when the weight of the aircraft is on the tire. 4. 80.

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 ____________ . retraction. stretching.

Tires should be removed for retreading when the tread groove wears to a depth of _____ inch at the shallowest point. l/32. 2/4.

79. A tire with the tread worn more in the middle than on the shoulders has been operated __________. underinflated. overinflated.

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

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. 30.

A burned area on a tire tread that indicates the tire has been hydroplaning _____ cause for removing the tire. is. is not.

83. A tire should be removed from service if a cut extends across more than _____ of the width of a tread rib. 12. 15.

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

A tire that has been involved in an aborted takeoff ______ safe for continued use. is. is not.

A tire in a dual installation whose mate has failed should be ________ . inspected. replaced.

87. A kinked bead in a tire _____ a cause for rejecting the tire. is. is not.

Exposed ply cords in the sidewall of an aircraft tire _____ cause for rejection of the tire. is. is not.

The FAA ________ specify the number of times an aircraft tire can be retreaded. does. does not.

90. Aircraft tires should be stored _________ whenever possible. horizontally. vertically.

The red dot on an aircraft tire identifies the ______ point of the tire. light. heavy.

The yellow mark on an aircraft tube identifies the ______ point of the tube. light. heavy.

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

The only lubricant approved for use between a tube and a tire is _________ . tire talcum. tire liquid.

When a retreaded tire is installed on an airpl ane with a retractable landing gear, a ________ _ test should be performed on the airplane. retraction. extension.