During a decompression event on board, how many oxygen masks drop from overhead compartments?

During a decompression event on board, how many oxygen masks drop from overhead compartments?

• A. Two
• B. Three
• C. Four
• D. Five

Answer: (C)

When cabin pressure is lost, oxygen masks automatically deploy from overhead panels above each seat so every passenger can breathe. The number of masks that drop equals the number of seats in that row, since there’s one mask per seat. In the scenario described, there are four seats in that row, so four masks drop. If the row had more seats, more masks would deploy; if fewer, fewer would deploy. The cockpit has its own masks from a separate system, not from the passenger overhead panels.

When cabin pressure is lost, oxygen masks automatically deploy from overhead panels above each seat so every passenger can breathe. The number of masks that drop equals the number of seats in that row, since there’s one mask per seat. In the scenario described, there are four seats in that row, so four masks drop. If the row had more seats, more masks would deploy; if fewer, fewer would deploy. The cockpit has its own masks from a separate system, not from the passenger overhead panels.