Oxygen

Question 1

Where can O2 pressure be read?

Answer 1

1. MFD status page (corrected for temp)
2. At the O2 cylinder (uncorrected for temp)

Question 2

Do the cockpit crew and the passengers share the same emergency O2?

Answer 2

No, the cockpit crew uses an O2 cylinder and the cabin pax use O2 chemical generators

Question 3

Can the chemical generators be shut off once they are started?

Answer 3

No

Question 4

What is the min O2 for a cockpit crew?

Answer 4

2 crew = Blue for 2
3 crew = Green for 3

Question 5

What activates when the flight deck O2 masks are removed from their storage unit?

Answer 5

1. Flow of O2 begins
2. Activates mask microphone
3. Activates flight deck speakers

Question 6

What happens if the TEST/RESET button is pressed while the flight deck O2 masks are not stowed?

Answer 6

1. Stops flow of O2
2. Deactivates mask microphone
3. deactivates flight deck speakers

Question 7

What type of O2 will the quick-donning crew masks provide?

Answer 7

1. Emergency = Pure O2 with positive pressure
2. 100% = Pure O2 at all altitudes
3. Normal = O2/air mixture (ratio depends on Cabin ALT

Question 8

During preflight how would you know if the cockpit crew O2 has been overpressurized?

Answer 8

The green blow-out disc would be missing on the forward right side of the fuselage

Question 9

What is the O2 duration for the Pax O2, FA cylinder, and PBE?

Answer 9

1. Pax O2 = 12 mins
2. FA cylinder = 30 mins
3. PBE = 15 mins

Question 10

When will the pax O2 masks auto deploy?

Answer 10

Once reaching a Cabin ALT of 14,000’ MSL

Question 11

Can the O2 door dispensing units be opened manually if it fails to auto deploy?

Answer 11

Yes, via a MRT located at each FA station

Question 12

What does the PBE provide?

Answer 12

1. Pressurized O2 and
2. protection from smokes, fumes, and fire up to FL410 for 15 mins
   Blue = Good
   Pink = Bad

Question 13

If you have a vacuum loss on the PBE, will it indicate Blue or Pink?

Answer 13

It will still indicate Blue unfortunately

Question 14

How many portable O2 cylinders are installed in the cabin>

Answer 14

2 cylinders (1 FWD, 1 AFT) with 2 masks per cylinder (4 total)

Question 15

On the Quick-Don Mask, what is the only setting that automatically turns the Purge Valve inside the mask on?

Answer 15

EMER, purging and smoke or fumes

Question 16

How can you bypass having the pax o2 masks deploy at 14,000?

Answer 16

Taking Pax o2 switch from AUTO (14,000) to OVRD

Question 17

What is the DISCHARGE INDICATOR DISK at the CREW 02 REFILL LOCATION?

Answer 17

The green (normal) oxygen cylinder pressure relief disc blows out (green disk gone) in the event of an overpressure. You’re not going to have any O2.

Question 18

Crew O2 is stored where and what is the cu. ft of the bottle?

Answer 18

FWD Cargo CMPT and is 77 cu. ft

Question 19

What initiates the automatic flow of O2 to the quick donning masks?

Answer 19

Opening of the O2 Stowage Box

Question 20

How long does PAX O2 chemical generation last?

Answer 20

12 minutes for standard config

Question 21

When do you receive CABIN HI ALTITUDE EICAS warning indication? Caution?

Answer 21

9,700 ft. Cabin Altitude for Warning (Red EICAS)
8,000 for Caution (start thinking about leveling off if it keeps going up and ask ATC for lower)