Oxygen

Question 1

On the flight deck oxygen masks what indicates that oxygen is flowing?

Answer 1

A bright yellow star

Question 2

How is the oxygen mask microphone activated?

Answer 2

By pressing the test/reset button when the mask is stowed

Question 3

What are the three settings on the flight crew oxygen masks?

Answer 3

Emerg
100%
Normal

Question 4

Describe each flight crew oxygen mask setting

Answer 4

Emerg = supplies pure oxygen under positive pressure
100% = supplies pure oxygen at all cabin altitudes
Norm = supplies a mix of oxygen and air (the ratio depends on cabin altitude)

Question 5

What does it mean when the cockpit oxygen pressure indication is in cyan?

Answer 5

Only enough oxygen for two crew members

Question 6

What is the size and pressure if the flight crew oxygen cylinder?

Answer 6

77ft cubed
1850 psi

Question 7

Where is the flight crew oxygen cylinder located?

Answer 7

Fwd cargo hold

Question 8

How long does the flight crew oxygen provide oxygen supply for?

Answer 8

Enough for emergency descent from 41000ft to 10000ft in 22mins at 100% setting and to continue cruise for 98 mins at 10000ft

Question 9

How long does oxygen flow last for in a smoke hood?

Answer 9

15 mins

Question 10

How long do the pax oxygen masks supply oxygen for?

Answer 10

Approx 12 mins

Question 11

When are the pax oxygen masks automatically deployed?

Answer 11

14,000ft to 14,750ft cabin altitude

Question 12

How is pax oxygen mask flow started once the masks have been deployed?

Answer 12

By pulling down on a mask (pulling down on one mask activates oxygen for 3 masks in the PSU)

Question 13

What is the minimum pressure required for the portable oxygen?

Answer 13

1500psi