Module 11.16 Pneumatic and vacuum

Question 1

What is an example of low pressure system?

Answer 1

Wing Anti-Ice (WAI)

Question 2

What is an example of a medium pressure system?

Answer 2

Typically air conditioning systems

Question 3

Where are high pressure air systems stored?

Answer 3

Air bottles

Question 4

Where may a vacuum system be used?

Answer 4

In gyroscopic instruments and de-icer boots

Question 5

When would air be taken from the HP port?

Answer 5

When the engine is at low rpm

Question 6

What are the two APU outputs?

Answer 6

• Electric
• Compressed air

Question 7

What air can be plugged directly into the common bleed air duct without pressure and temperature control?

Answer 7

• APU bleed
• Compressor output

Question 8

What valve is used to control engine bleed pressure?

Answer 8

Pressure regulating valve

Question 9

What air is used to cool engine bleed air via the pre cooler?

Answer 9

Fan air

Question 10

What valve is used to prevent over pressurising of the common bleed duct?

Answer 10

Over pressurisation valve

Question 11

What separates the LH and RH side of the common bleed air duct?

Answer 11

Cross bleed valve

Question 12

What must be done to bleed air prior to being inputted to the common bleed duct?

Answer 12

• Temperature and pressure regulated

Question 13

What are the two types of pumps?

Answer 13

• Wet pumps
• Dry pumps

Question 14

What are dry pumps made of to prevent the need for lubrication?

Answer 14

Carbon

Question 15

What is an additional part required in a wet pump?

Answer 15

Oil water separator

Question 16

For the pneumatic system the air synoptic display shows what?

Answer 16

• Isolation valve position
• Ground air use
• Duct pressure
• Engine bleed air PRV and shut off valve postion
• APU shut off valve position