Which duration correctly describes the oxygen supply time from passenger oxygen generators?

Which duration correctly describes the oxygen supply time from passenger oxygen generators?

• A. 7 minutes
• B. 13 minutes
• C. 12 minutes
• D. 24 minutes

Answer: (B)

Oxygen supply time from passenger oxygen generators is a fixed duration determined by how much chemical oxygen material is inside the generators and the rate at which it delivers oxygen. These systems are designed to provide enough oxygen for the critical period after depressurization, long enough for the aircraft to descend to a safe altitude and for passengers to reach breathable air. In standard training and certification references, that fixed burn time is about 13 minutes, which is why 13 minutes is the best choice. The other durations don’t match the typical capacity of the passenger oxygen system: 7 minutes is too short, 12 minutes is close but not the commonly cited value in this context, and 24 minutes exceeds the generator’s fixed supply.

Oxygen supply time from passenger oxygen generators is a fixed duration determined by how much chemical oxygen material is inside the generators and the rate at which it delivers oxygen. These systems are designed to provide enough oxygen for the critical period after depressurization, long enough for the aircraft to descend to a safe altitude and for passengers to reach breathable air. In standard training and certification references, that fixed burn time is about 13 minutes, which is why 13 minutes is the best choice. The other durations don’t match the typical capacity of the passenger oxygen system: 7 minutes is too short, 12 minutes is close but not the commonly cited value in this context, and 24 minutes exceeds the generator’s fixed supply.