PNEUMATIC SYSTEM

通報

問題一覧

Air bleed from the engines is:

Cooled in a heat exchanger by cooling air bleed from fan section

Can you control the HP valve position through the air bleed cockpit panel?

Cross-bleed valve is provided with 2 electrical motors:

One for the automatic mode, the other one for the manual mode

High pressure air are supplied from:

Engine 1 and 2 bleed systems, APU load compressor, HP ground connection

If the bleed valve closed electrically, the HP valve:

Closes automatically

In case of low upstream pressure, the high pressure valve (HP valve) is:

Pneumatically closed

Pneumatic system operation is controlled and monitored by:

Two bleed monitoring computers

Temperature regulation is achieved by the pre cooler which regulates and limits the temperature to:

200°C

To provide external air for engine number 2 start, the following switching is required:

Pneumatic X-bleed OPEN

What happens when pressure and temperature are not sufficient to supply the corresponding engine bleed valve:

HP valve opened, IP stage remains in the same configuration

Which source controls the crossbleed valve:

Electric

Which source operates the bleed valve?

Pneumatic

With engines and APU running, and the APU BLEED selected ON, choose the correct statement:

Engine bleed valves close, X bleed valve opens, APU bleed valve opens

B777 - Part 8

B777 - Part 8

B777 - Part 3

B777 - Part 3

B777 - Part 6

B777 - Part 6

B777 - Part 4

B777 - Part 4

B777 - Part 1

B777 - Part 1

B777 - Part 7

B777 - Part 7

B777 - Part 9

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B777 - Part 9

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B777 - Part 2

B777 - Part 2

B777 - Part 5

B777 - Part 5

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