An oxygen generating canister can provide oxygen for about ____________ minutes.

An oxygen generating canister can provide oxygen for about ____________ minutes.

• A. 5
• B. 10
• C. 15
• D. 20

Answer: (C)

Emergency oxygen generating canisters are sized to provide a fixed amount of breathable oxygen at the required flow for a limited period. For the A320, once the generator is activated, it typically delivers oxygen for about 15 minutes. That duration is enough for crew to don masks, assess the situation, and descend to a safe altitude after a decompression. Shorter durations like 5 or 10 minutes wouldn’t give enough time to manage the emergency, while a longer duration such as 20 minutes would exceed the design limits of the canister.

Emergency oxygen generating canisters are sized to provide a fixed amount of breathable oxygen at the required flow for a limited period. For the A320, once the generator is activated, it typically delivers oxygen for about 15 minutes. That duration is enough for crew to don masks, assess the situation, and descend to a safe altitude after a decompression. Shorter durations like 5 or 10 minutes wouldn’t give enough time to manage the emergency, while a longer duration such as 20 minutes would exceed the design limits of the canister.