Question id 265 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

The Same Source Of Supply Is Used By The Crew And Passengers.
With the setting on "NORMAL", the crew breathes a mixture of oxygen and cabin air.
The passenger source of supply never uses chemically generated oxygen.
The Seals Must Be Carefully Greased To Avoid Sparks.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license