United Standard Operating Procedures (SOP) Practice Test

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.