M11c11

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通報

問題一覧

A hydraulic pump driven by the pneumatic system usually an

auxiliary or emergency pump.

A hydraulic pump driven by the electrical system is usually an

auxiliary or emergency pump

A Ram Air Turbine (RAT) hydraulic pump is for

flying controls if hydraulic power lost.

The differential pressure indicator warning on a hydraulic system, indicates the condition of the

filter

An accumulator has a pre-charge nitrogen pressure of 800 PSI. if 1000 PSI of hydraulic pressure is pumped into the accumulator, the nitrogen pressure gauge will read

1000 PSI

Engine driven hydraulic pumps are lubricated by

hydraulic oil via the case drain.

When taking a hydraulic fluid sample for analysis, the sample should be taken when the fluid temperature is

near to operating temperature, no more than 5˚C cooler than operating temperature.

An 'internal gear' hydraulic pump is one which has gears in which the teeth project

outwards on one gear and inwards on the other gear.

When a variable displacement axial piston type pump has its swashplate perpendicular to the pump axis, the pump output is

zero

A ‘double-acting’ hydraulic hand pump

provides hydraulic fluid on each input stroke.

The rotational speed of a ram air turbine (RAT), used for emergency hydraulic power generation, is

dependent upon the aircraft speed, it cannot be otherwise controlled.

Thy hydraulic pump that has circularly or eliptically shaped intrior and flat end plates is called

vane pump

Power pack system is widely used in

light aircraft

Exxon Hyjet v hydraulic fluid is

phosphate easter based

Hydraulic fuse in the thrust reverser system is installed in

pressure/return lines.

If a component has an internal hydraulic leak

increase in fluid temperature will happen .

Synthetic hydraulic fluid subjected to overheating is high in

acidity

Restrictor valves in a hydraulic system are used to

control the rate of system operation.

Automatic cut-out valve hammering is caused by

low accumulator pressure.

Constant delivery hydraulic pumps

require an automatic cut-out valve and accumulator in the system.

Friction in hydraulic systems creates …….. that must be continuously removed from the fluid

heat

A closed hydraulic system directs fluid flow to the main system

manifold.

Hydraulic systems normally operate at

3000 PSI.

In a hydraulic system, fluid pressure is converted into useful work

by the actuator

In a pressurized hydraulic system, the reservoir is pressurized to approximately

65 psi,

is used for change over from main to auxiliary system in the case of failure.

A shuttle valve

Hydraulic reservoirs are pressurized to compensate for low atmospheric pressure encountered

at high altitudes.

Power transfer units(PTU) is used to

transfer power between systems

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