breaks in shiiit

(Refer to Figure 10.) The trunnion nut on an aircraft landing gear requires a torque of 320 inch-pounds. To reach the nut, a 2-inch straight adapter must be used on an 18-inch torque wrench. How many foot-pounds will be indicated on the torque wrench when the required torque of the nut is reached? A— 24. B— 28.8. C— 22.

A

special bolt in a landing gear attachment requires a torque value of 440 inch-pounds. How many foot-pounds are required? A— 36.8. B— 38. C— 36.6.

c

The purpose of an orifice check valve is to A— relieve pressure to a sensitive component. B— restrict flow in one direction and allow free flow in the other. C— relieve pressure in one direction and prevent flow in the other direction.

B An orifice check valve is a component in a hydraulic system that allows a free flow of fluid in one direction, but restricts its flow in the opposite direction.

In shock struts, chevron seals are used to A— absorb bottoming effect. B— prevent oil from escaping. C— serve as a bearing surface.

B the chevron seals installed in an oleo shock strut prevent oil from escaping from the strut.

If an aircraft shock strut (air/oil type) bottoms upon initial landing contact, but functions correctly during taxi, the most probable cause is A— low fluid. B— low air charge. C— a restricted metering pin orifice.

A an aircraft shock absorber bottoms out on initial landing contact but functions properly during taxiing, the fluid supply is probably low but the air charge is proper.

An O-ring intended for use in a hydraulic system using MIL-H-5606 (mineral base) fluid will be marked with A— a blue stripe or dot. B— one or more white dots. C— a white and yellow stripe.

A O-rings intended for use with MIL-H-5606 hydraulic fluid are identified by a blue stripe or a blue dot.

A flexible hydraulic hose identified as MIL-H-8788 will have a stripe running the length of the hose. This stripe A— is used to ensure that the hose is installed without excessive twisting. B— identifies that the hose is for high pressure fluids, with a 60 degree flexing range. C— identifies that the hose is constructed of Teflon and is suitable for a wide temperature range.

A The stripe that runs the length of a hydraulic hose is called a twist stripe, or lay line. The purpose of a twist stripe is to allow a technician to be sure that the hose is not twisted when it is being installed. The stripe should be straight down the hose, not spiraled around it.

When servicing an air/oil shock strut with MIL-5606 the strut should be A— collapsed and fluid added at the filler opening. B— fully extended and fluid added at the filler opening. C— partially extended and fluid added at the filler opening.

A To service an air-oil shock strut, bleed all of the air out to collapse the strut, and remove the strut filler valve. Completely fill the collapsed strut with MIL-H-5606 fluid, and exercise the strut by moving the piston into and out of the cylinder to work all of the air out of the strut. Replace the filler valve and, with the weight of the aircraft on the wheel, fill the strut with compressed air or nitrogen until the strut extends to the correct height.

To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact, A— various types of valves or orifices are used which restrict the reverse fluid flow. B— the metering pin gradually reduces the size of the orifice as the shock strut extends. C— the air is forced through a restricted orifice in the reverse direction.

A Various types of valves and orifices are used inside an oleo strut to prevent a rapid extension of the strut after the initial landing impact has been absorbed

If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, the wheels can be termed as having A— toe-out. B— toe-in. C— negative camber.

A lines drawn through the center of each of the wheels of an aircraft landing gear cross behind the wheels, the landing gear has toe-out. The landing gear will tend to spread out as the aircraft rolls forward.

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

B aircraft equipped with retractable landing gear must incorporate some means by which the gear may be extended if the normal operating mechanism fails.

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

B sleeve, spacer, or bumper ring is incorporated inside an air-oil shock strut to limit its extension stroke.

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

B steering damper is a hydraulically operated device that accomplishes the functions of steering and eliminating shimmying. The steering damper automatically reverts to damping when, for any reason, the flow of high-pressure fluid is removed from its inlet.

A hydraulic system referred to as a "power pack" system will A— have an engine-driven pump for greater pressure. B— have all hydraulic power components located in one unit. C— have a pressurized reservoir.

B A hydraulic "power pack" is a small, self-contained hydraulic system that includes the reservoir, pump, selector valves, and relief valves all in one easy-to-service unit

What is the function of a cam incorporated in a nose gear shock strut? A— Provides an internal shimmy damper. B— Straightens the nosewheel. C— Provides steering of aircraft during ground operation.

B Many retractable landing gears use a centering cam to center the nosewheel when all the weight is off of the shock strut. The centering cam ensures that the wheel is positioned so it will fit into the wheel well properly when it is retracted.

A fully-charged hydraulic accumulator provides A— air pressure to the various hydraulic components. B— a source for additional hydraulic power when heavy demands are placed on the system. C— positive fluid flow to the pump inlet.

B The accumulator allows an incompressible fluid such as oil to be stored under pressure. The fluid stored in the accumulator under pressure is available to supplement the pump as an additional source of hydraulic power when heavy demands are placed on the system.

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 A— shimming the axle in the oleo trunnion. B— inserting, removing, or changing the location of washers or spacers at the center pivotal point of the scissor torque links. C— placing shims or spacers behind the bearing of the out-of-tolerance wheel or wheels.

B Toe-in on an aircraft equipped with an oleo landing gear may be adjusted by inserting, removing, or changing washers or spacers at the center pivot point of the scissors torque links.

When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by A— compression of the air charge. B— the fluid being forced through a metered opening. C— compression of the fluid.

B the initial landing impact is cushioned in an air-oil shock strut by the fluid being forced from one chamber to another through a metered opening.

The metering pins in oleo shock struts serve to A— lock the struts in the DOWN position. B— retard the flow of oil as the struts are compressed. C— meter the proper amount of air in the struts.

B the metering pin in an oleo shock strut retards the flow of oil as the strut is compressed. This retarded flow causes a more even absorption of shock.

What condition would most likely cause excessive fluctuation of the pressure gauge when the hydraulic pump is operating? A— Accumulator air pressure low. B— Inadequate supply of fluid. C— System relief valve sticking closed

B thecondition most likely to cause excessive fluctuation of the pressure gauge, when the pump is operating, is an inadequate supply of fluid. When the pump alternately picks up fluid and then air, the pressure gauge fluctuates.

If a shock strut bottoms after it has been properly serviced, the A— strut should be disassembled and the metering pin orifice plate replaced. B— air pressure should be increased. C— strut should be removed, disassembled, and inspected.

C a shock strut bottoms after it has been properly serviced with both oil and air, it should be removed from the aircraft, disassembled, and inspected to find the problem.

A filter incorporating specially treated cellulose paper is identified as a A— sediment trap. B— cuno filter. C— micronic filter.

C A Micronic filter used in a hydraulic system has an element made of specially treated cellulose paper, formed in vertical convolutions, or pleats. The Micronic element prevents the passage of solids greater than 10 microns (0.000394 inch) in size.

When installing a chevron-type seal in an aircraft hydraulic cylinder, the open side of the seal should face A— opposite the direction of fluid pressure. B— up or forward when the unit is installed in a horizontal position. C— the direction of fluid pressure.

C A chevron seal is installed in a hydraulic component in such a way that the open sides of the seal face in the direction of the fluid pressure. When the seal is properly installed, the hydraulic pressure will force the seal tightly against the cylinder walls.

What device in a hydraulic system with a constantdelivery pump allows circulation of the fluid when no demands are on the system? A— Pressure relief valve. B— Shuttle valve. C— Pressure regulator.

C A hydraulic-system pressure regulator is also called an unloading valve. When the system pressure is high enough, the pressure regulator traps the fluid in the system, where it is held by the air pressure in the accumulator. With the system pressure trapped, the pressure regulator directs the output of the pressure pump back into the reservoir. The fluid circulates with very little load on the pump. As soon as fluid is demanded by the system, the pressure regulator directs the pump output back into the system.

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

C A sequence valve is installed in a hydraulic landing gear system to ensure that the landing gear doors are fully open before the landing gear is either retracted or extended.

After performing maintenance on an aircraft's landing gear system which may have affected the system's operation, it is usually necessary to A— conduct a flight test. B— re-inspect the area after the first flight. C— make an operational check with the aircraft on jacks.

C Any maintenance done to an aircraft landing gear that could affect its ability to retract and extend should be followed by a retraction test with the aircraft on jacks.

What should be checked when a shock strut bottoms during a landing? A— Air pressure. B— Packing seals for correct installation. C— Fluid level.

C If a shock strut bottoms during landing, the fluid is probably low. Transfer of the fluid from one chamber to another cushions the impact of landing, whereas the air pressure cushions the shocks produced when the aircraft is taxiing.

Extension of an oleo shock strut is measured to determine the A— amount of oil in the strut. B— physical condition of the strut itself. C— proper operating position of the strut.

C The amount of extension of an oleo strut is measured to determine the proper amount of air in the strut. This is undoubtedly what is meant in this question by the proper "operating position" of the strut.

the hydraulic packing seals used in a landing gear shock strut are A— generally designed to be compatible with more than one type of fluid. B— kept from direct contact with fluid by teflon or nylon backup rings. C— used only with a specific type of fluid.

C The seals used in a landing gear shock strut are made of a material that is compatible only with the type of fluid that is used in the strut. When replacing the seals, use only the seal having the correct part number and a current cure date.

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 A— thoroughly lubricate the piston rod. B— force out any excess fluid. C— ensure proper packing ring seating and removal of air bubbles.

C When a shock strut has been filled with fluid, it should be extended and compressed at least twice to be sure that all the packing rings are properly seated and all the air is worked out of the fluid.

What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut? A— Limit compression stroke. B— Hold the strut in place. C— Maintain correct wheel alignment.

C the torque links that attach the piston to the cylinder of a landing gear oleo strut maintain the correct wheel alignment.

instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found A— on the airplane data plate. B— in the aircraft operations limitations. C— in the aircraft manufacturer's service manual.

C the type of fluid and the recommended air pressure to be used in an aircraft shock strut is found in the aircraft manufacturer's service manual.