How long does oxygen flow from chemically generated systems typically last?

The correct duration of oxygen flow from chemically generated systems is 12 to 22 minutes. This range is based on the performance characteristics of these systems, which are designed to deliver supplemental oxygen in critical situations, such as during emergencies when standard oxygen systems may not be available or operational.

Chemically generated oxygen systems work by producing oxygen through a chemical reaction, and they can be a reliable source of supplemental oxygen when immediate access to a pressurized tank is not feasible. The 12 to 22 minute duration is adequate to provide oxygen support for passengers and crew until the aircraft can regain suitable conditions or reach a safe altitude.

This timeframe is essential to understanding aircraft safety protocols and emergency procedures, ensuring that trained personnel can effectively assist individuals who may need oxygen in the event of cabin depressurization or other emergencies.