Min O2 for 2 Crew?

Min O2 for 2 Crew?

• A. 810 PSI
• B. 800 PSI
• C. 900 PSI
• D. 700 PSI

Answer: (A)

In an aircraft depressurization, the fixed oxygen system for two crew must have enough oxygen to keep both masks delivering during the emergency. The value 810 psi is the minimum cylinder pressure specified for two crew on this airplane, meaning there is guaranteed oxygen flow to both masks as long as the pressure is at or above that level. If the pressure drops below 810 psi, the system may not reliably provide the needed oxygen to both crewmembers for the required duration. So, 810 psi is the best answer because it reflects the minimum acceptable starting pressure that ensures two crew can receive oxygen during the critical period after a loss of cabin pressure. Choices like 800 psi would be below the mandated minimum, while 900 psi is above it (still acceptable, but not the threshold), and 700 psi is clearly too low.

In an aircraft depressurization, the fixed oxygen system for two crew must have enough oxygen to keep both masks delivering during the emergency. The value 810 psi is the minimum cylinder pressure specified for two crew on this airplane, meaning there is guaranteed oxygen flow to both masks as long as the pressure is at or above that level. If the pressure drops below 810 psi, the system may not reliably provide the needed oxygen to both crewmembers for the required duration.

So, 810 psi is the best answer because it reflects the minimum acceptable starting pressure that ensures two crew can receive oxygen during the critical period after a loss of cabin pressure. Choices like 800 psi would be below the mandated minimum, while 900 psi is above it (still acceptable, but not the threshold), and 700 psi is clearly too low.