Oxygen

Question 1

the airplane oxygen system is comprised of

Answer 1

• flight crew oxygen
• passenger oxygen
• PBE
• portable oxygen cylinders

Question 2

MASKS DEPLOY Selector Knob OFF/AUTO/OVRD

Answer 2

OFF - disables automatic deployment of pax oxygen masks
AUTO - enables auto deployment when cabin pressure is above 14,000 ft
OVRD - deploys pax oxygen masks

Question 3

oxygen cylinder max pressure at 70C

Answer 3

1850 psi

Question 4

oxygen cylinder location

Answer 4

forward cargo compartment

Question 5

PBEs provide oxygen for

Answer 5

at least 15 minutes

Question 6

passenger oxygen generators provide oxygen for

Answer 6

approx 12 minutes

Question 7

What happens automatically when mask doors are commanded open

Answer 7

FASTEN SEAT BELT and NO ELEC DEVICE lights activate

Question 8

What is the purpose of the portable oxygen cylinders

Answer 8

flight attendant use to assist pax in case of sudden cabin decompress or first aid purposes

Question 9

min portable oxygen cylinder pressure for dispatch

Answer 9

1550 psi

Question 10

How many PBEs

Answer 10

4

Question 11

How many POBs

Answer 11

170 - 2

175 - 3

Question 12

CREW OXY LO PRESS caution

Answer 12

oxygen cylinder pressure is below acceptable safety limits or pressure sensor failure

Question 13

PAX OXY NOT DEPLOYED caution

Answer 13

cabin alt pressure is above 14,200 ft with masks not deployed

Question 14

PAX OXY SW NOT AUTO advisory

Answer 14

passenger oxygen selector set to the OFF position

Question 15

OBSERVER OXY LO PRESS advisory

Answer 15

oxygen cylinder is below acceptable safety limits for 3 crew members or pressure sensor failure