TKE: Pneumatic System

With engines and APU running and APU bleed valve selected ON, select the correct statement:

• Engine bleed valves open, X bleed valve opens, APU bleed valve closes

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

• Engine bleed valves open, X bleed valve closes, APU bleed valve opens

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

To provide external air for ENG start the following switching is required:

• Pneumatic X-bleed AUTO

• Pneumatic X-bleed OPEN

• Engine bleed switches OFF

• APU bleed switch OFF

Air bleed from the engines is:

• not cooled prior to being used by the systems

• cooled in a heat exchanger by cooling air bleed from fan section

• cooled using ambient air

• only cooled in air conditioning part

High pressure air is supplied from:

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

• Engine 1 and 2 bleed systems

• Engine 1 and 2 bleed systems and APU load compressor

Pneumatic system operation is controlled and monitored by:

• one bleed monitoring computer

• two bleed valve computers

• two bleed monitoring computers

Which source operates the bleed valve?

• Pneumatic

• Electric

• Both

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

• IP valve closed

• HP valve opened, IP stage closed

• HP valve opened, IP stage remains in the same configuration

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

• Yes

• No

If the bleed valve closes, the HP valve:

• opens automatically

• closes automatically

Temperature regulation is achieved by the precooler which regulates and limits the temperature at:

• 150ºC

• 85ºC

• 200ºC