Hydraulics Flashcards

1
Q

A PTU FAULT is triggered during engine start if the last engine is started within:

A

40 seconds following the end of the cargo operating

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2
Q

The system operating pressure when powered by the RAT is

A

2500psi

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3
Q

Engine 1 pump powers the ——— hydraulic system

A

Green

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4
Q

The blue system is pressurised by

A

An electric pump

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5
Q

In an emergency the blue system is pressurised by

A

The Ram Air Turbine

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6
Q

A pump driven by Engine — pressurises the yellow system

A

Engine 2

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7
Q

The bidirectional Power Transfer Unit enables the yellow system to pressurise the

A

Green system and vice versa

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8
Q

The PTU comes into action automatically when the differential pressure between the Green and Yellow systems is

A

Greater than 500psi. The PTU therefore allows the Green system to be pressurised on the ground when the engines are stopped.

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9
Q

The RAT deploys automatically if AC BUS 1 and AC BUS 2

A

Are both lost.

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10
Q

The RAT can be stowed only when the aircraft

A

Is on the ground

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11
Q

Priority valves cut off hydraulic power to heavy load users if

A

Hydraulic pressure in a system gets low

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12
Q

The Leak Measurement Valves measure

A

The leakage in each circuit

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13
Q

Normal brakes receive pressure from the

A

Green system

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14
Q

The landing gear receives pressure from the

A

Green system

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15
Q

Alternate and Park brakes receive pressure from the

A

Yellow system

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16
Q

NWS receives pressure from the

A
Yellow System.
Green system (VH-YUD)
17
Q

Reverser Engine 2 is powered by the

A

Yellow hydraulic system

18
Q

Engine 1 and 2 PB fault light will remain illuminated when selected off during

A

An overheat (will remain illuminated as long as the overheat condition lasts)

19
Q

If AC power is available the Blue hydraulic electric pump operates

A

In the air.

On the ground, if one engine is running or the crew have pressed the BLUE PUMP OVRD pushbutton on the maintenance panel

20
Q

Reservoir quantity indication is green unless

A

The fluid level goes below the warning level, in which case it goes amber.

21
Q

Hydraulic fluid levels, if at the top of the normal filling range, are

A

Blue 6.5 litre
Green 14.5 litre
Yellow 12.5 litre

22
Q

System pressure indication, normally green, becomes amber when

A

System pressure is less than 1450psi