What are the three positions of the passenger oxygen switch in the cockpit?

• A. Off; Norm; On
• B. On; Off; Auto
• C. Standby; Active; Emergency
• D. Open; Closed; Auto

Answer: (A)

The switch for the passenger oxygen system is designed to control when oxygen is available to the cabin. It has three positions: Off, Norm, and On. Off shuts the system down, so no oxygen is supplied to passengers. Norm is the normal operating setting, where the system functions automatically as designed and oxygen is provided to passengers when needed (such as during a depressurization or when masks are deployed). On forces oxygen to the passenger system regardless of automatic triggers, which is used for testing or specific operational scenarios where immediate oxygen supply is required. The other option sets describe different terminology not used for this passenger switch, so they don’t fit this control.