11.16 - Pneumatics Flashcards
1
Q
Under normal conditions how is a pneumatic valve operated
A
By a switch on the flight deck
2
Q
How is the pneumatic system pressure controlled
A
By the bleed valve
3
Q
Which type of valve is the pneumatic. Bleed valve
A
Electrically signalled and pneumatically operated
4
Q
What is the source of cooling air for the pneumatic pre cooler
A
Engine fan air
5
Q
What does the pneumatic system supply
A
The air conditioning system
6
Q
How does the fan air cool the engine bleed air
A
Cold air in the heat exchanger picks up the heat whilst cross flowing
7
Q
How is the temperature of the air in the pneumatic system regulated
A
By varying the amount of pneumatic air passing the pre cooler
