What happens if the hydraulic pressu - 考试宝

单选题

What happens if the hydraulic pressure drops?

A、

The priority valves give priority to the heavy load users.

B、

The priority valves give priority to the essential systems

C、 The priority valves modulate the pressure to the users.

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相关试题

单选题 In normal operation ,what is the blue hydraulic system pressurized by?

A、

The power transfer unit.

B、

An engine driven pump.

C、

An electric pump.

单选题 A blue system pipeline is identified by:

A、

A blue band and number 1.

B、

A blue band and number3.

C、

A blue band and number2.

单选题 when dose the electric pump pressurize the blue system?

A、

When the aircraft is on the ground,ELEC PUMP shut-button is set to AUTO and

OVRD(override) push-button is set to ON

B、

When the green and yellow systems are detected in low pressure configuration

C、

As soon as one engine is running and OVRD pushbutton is set ON

单选题 when is the engine fire shut-off valve closed?

A、

Automatically when the engine is shut down

B、

If the ENG FIRE pushbutton is released out

C、

Automatically as soon as engine fire is detecte

单选题 When is the PTU operation inhibited?

A、

Never, it cannot be inhibited.

B、

Only if an engine failure has been detected.

C、

In case of cargo door operation with the yellow electric pump.

单选题 Is it possible to stow the ram air turbine in flight?

A、

No.

B、

Yes.

单选题 Which surfaces are used for lift dujping?

A、

All spoilers.

B、

Spoiler 1 to 3.

C、

Spoilers 1 to 4.

单选题 Which hydraulic systems are pressurized by an engine driven pump?

A、

Blue and green.

B、

Yellow and blue.

C、

Green and yellow.