Pneumatic Systems Flashcards
1
Q
What is the purpose of the ‘HEPA’ filter? (High Efficiency Particulate Arresting)
A
Removes bacteria from the air, before it is put into the cabin.
Traps 99% of bacteria and virus’s
2
Q
How much of the air is recycled in a pressurised aircraft?
A
50% of the air is recycled through re-circulation fans.
3
Q
What is the purpose of ‘Ground pressurisation’?
A
Pressurises the aircraft while on the ground to give it a head start.
If the power is needed in the engines, then the aircraft can pressurise more gradually.
4
Q
Cabin pressure is indicated on the flight deck as?
A
Cabin Altitude.
5
Q
What is the max difference in pressure between the cabin and the atmosphere?
A
8-9Psi (bars)
