Approximately how long will oxygen be produced by a PBE?

The correct duration for oxygen production by a Portable Breathing Equipment (PBE) is approximately 15 minutes. This time frame is essential as it allows flight attendants and other crew members to use the PBE effectively in smoke-filled or otherwise hazardous environments. It provides sufficient time to perform necessary emergency procedures, assist passengers, or evacuate the aircraft if needed. Understanding this duration is crucial for ensuring the safety and preparedness of crew members in emergency situations.

Other options such as 10, 20, and 25 minutes do not reflect the standard operational time for PBEs, which is vital for effective emergency training and safety protocols.