Pneumatic

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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

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

Pneumatic X-bleed OPEN

Air bleed from the engines is:

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

High pressure air are supplied from:

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

Pneumatic system operation is controlled and monitored by:

Two bleed monitoring computers

What operates the x-bleed valve?

Two electrical motors

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

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

If the bleed valve closed electrically, the HP valve:

Closes automatically

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

200°C

When APU bleed is selected the cross bleed valve goes to:

Open position

Which source controls the crossbleed valve:

Electric

Cross-bleed valve is provided with 2 electrical motors:

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

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

Pneumatically closed

In case of a wing leak signal:

All options

When does the APU bleed valve open?

When N > 95%

What controls and monitors the Pneumatic system?

Two Bleed Monitoring Computers

Which source operates the bleed valve?

Pneumatic

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