489 - ATPL Question Bank in English - For the appropriate oxygen and protective-breathing equipment carried on a pressurised aeroplane, which uses are recognised? 1 - Supplemental oxygen after depressurisation. 2 - First-aid oxygen for passengers who require it under the applicable conditions. 3 - Supplying the normal cabin ventilation air directly from oxygen cylinders. 4 - Flight-crew respiratory protection with suitable oxygen masks or protective-breathing equipment during smoke or fumes. Select the combination containing all correct uses.

Question 489 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot Licence