Question 395 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Reduce pressure in the oxygen reservoir to a suitable manifold pressure for the regulator
Act as a manual shut-off valve
Relieve overpressure if the pressure reducing valve malfunctions
Maximize the charging pressure of the system

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