Landing Gear Quiz #2
On an air valve core stem, what indicates high-pressure type? A. An embossed letter 'NP' B. An embossed letter 'HP' C. An embossed letter 'H'
An embossed letter 'H'
What should be checked when a shock strut bottoms during landing? A. Air pressure B. Packing seals for incorrect installation C. Fluid level
Fluid level
What condition would mostly 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
Inadequate supply of fluid
What is the purpose of the torque links attached to the cylinder and piston of a landing ear oleo strut? A. Limit compression stroke B. Hold the strut in place C. Maintain correct wheel alignment
Maintain correct wheel alignment
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
Straightens the nosewheel
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 lubricated the piston rod. B. force out any excess fluid C. ensure proper packing ring seating and removal of air bubbles
ensure proper packing ring seating and removal of air bubbles
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
extend the landing gear if the normal operating mechanism fails
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
have all hydraulic power components located in one unit
A filter incorporating specially treated cellulose paper is identified as a A. sediment trap B. cuno filter C. micronic filter
micronic filter
In shock struts, chevron seals are used to A. absorb bottoming effect B. prevent oil from escaping C. serve as a bearing surface
prevent oil from escaping
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
proper operating position of the strut
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
the fluid being forced through a metered opening
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
used only with a specific type of fluid
Nose gear entering cams are used in many retractable landing gear systems. The primary purpose of the centering device is to A. align the nosewheel prior to touchdown B. engage the nosewheel steering C. center the nosewheel before it enters the wheel well
center the nosewheel before it enters the wheel well
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
collapsed and fluid added at the filler opening
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
limit the extension stroke
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
low fluid
On most aircraft, the oil level of an air and oil shock strut is checked by A. removing the oil filler plug and inserting a guage B. measuring the length of the strut extension with a certain air pressure in the strut C. releasing the air and seeing that the oil is to the level of the filler plug.
releasing the air and seeing that the oil is to the level of the filler plug
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
restrict flow in one direction and allow free flow in the other
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
strut should be removed, disassembled, and inspected
