In a normal pressurized flight, when are oxygen masks required for passengers?

• A. Oxygen is only needed in the event of a depressurization; otherwise, masks remain secured.
• B. Oxygen is always required regardless of depressurization.
• C. Only during turbulence.
• D. Only for infants

Answer: (A)

Oxygen masks are there for emergencies when cabin pressure is lost. In a normally pressurized flight, passengers breathe through the cabin air, so masks aren’t needed and stay secured. The masks drop and become necessary only if depressurization occurs, with the system designed to supply oxygen while the aircraft descends to a safe altitude. Turbulence doesn’t trigger mask deployment, and masks aren’t reserved only for infants either. So, oxygen masks are required only during depressurization.