Oxygen system

Question 1

At what pressure will the oxygen bottle discharge overboard ?

Answer 1

2500 - 2775 psi

Question 2

At what cabin altitude do the passenger masks automatically deploy ?

Answer 2

At 13500 if LFE < or = 8000 ft

At 14750 if LFE > 8000 ft

Question 3

What’s the difference between oxygen selection of NORMAL and 100% on the mask/regulator ?

Answer 3

In NORMAL, you get diluted oxygen and with 100% selected, you get undiluted oxygen.

Question 4

What’s the difference between selections of NORMAL and EMERGENCY ?

Answer 4

In NORMAL, it allows regulator to provide diluter-demand flow, and in EMERGENCY position, it sets regulator to provide constant positive pressure flow.

Question 5

How can the tension in the mask harness be adjusted to make it more comfortable ?

Answer 5

Using a comfort toggle on the front of the mask.

Question 6

What action must passengers perform to get oxygen to flow into the passenger mask retaining bag ?

Answer 6

Pull on the lanyard to remove the flow pin.