What is the flow rate duration of compressed oxygen in the lavatory?

• A. 5–10 minutes
• B. 12–22 minutes
• C. 20–30 minutes
• D. 30–40 minutes

Answer: (B)

The flow rate duration of compressed oxygen in the lavatory is 12–22 minutes, which aligns with operational safety standards and design parameters for aircraft lavatory oxygen systems. This time frame allows for adequate provision of oxygen to passengers in case of an emergency, particularly during cabin depressurization scenarios where passengers might need supplemental oxygen.

The design takes into account the need for prompt and effective response to an emergency while ensuring that the oxygen supply is not overly extended, which could lead to unnecessary depletion of resources. By providing a duration of 12–22 minutes, the system strikes a balance between sufficient support and efficient use of available oxygen reserves, ensuring passengers receive the necessary assistance when needed most.