Which aircraft type uses gaseous oxygen systems as indicated in standard configurations?

• A. B747 uses gaseous oxygen
• B. B747 uses chemically generated oxygen
• C. All aircraft use the same oxygen system
• D. Oxygen is not available on B747

Answer: (A)

Gaseous oxygen systems store compressed oxygen in cylinders and deliver it through regulators to the crew and masks when the system is activated. This setup provides immediate, continuous flow during a depressurization event, which is crucial for pilots and essential personnel operating at altitude. In the Boeing 747’s standard configuration, the oxygen supply for the crew is provided by a gaseous system, ensuring a reliable and ongoing supply without relying on on-demand chemical reactions. By contrast, passenger oxygen masks on many airliners use chemically generated oxygen produced by onboard generators, which is a different approach. So, the Boeing 747 is the aircraft type associated with gaseous oxygen in its standard configuration.