What type of O2 masks are provided for pilots and what about passengers?

• A. Pilots: quick-donning diluter-demand; Passengers: continuous flow
• B. Pilots: quick-donning diluter-demand; Passengers: nasal cannula
• C. Pilots: continuous flow; Passengers: rapid-donning masks
• D. Pilots: full-face mask; Passengers: nasal cannula

Answer: (A)

Oxygen delivery is chosen to meet the different needs of the crew and passengers during an altitude event. The pilot’s mask is designed to be donned quickly and to supply oxygen on demand with a diluter that mixes ambient air to keep the breathing oxygen concentration appropriate as you breathe harder or at higher altitudes. This quick-donning diluter-demand setup is ideal for the pilot who must react fast and maintain a reliable FiO2 under workload.

Passengers don’t need to operate any valves or demand a flow; they’re provided with a continuous-flow oxygen mask that delivers a steady supply of oxygen regardless of breathing pattern, ensuring a consistent FiO2 for those not actively managing their own oxygen flow. Nasal cannulas or other more basic configurations aren’t used for cabin emergency oxygen in this context, and options like full-face or rapid-donning masks don’t match the standard passenger setup.

So, pilots get a quick-donning diluter-demand mask, while passengers get a continuous-flow mask.