FAA Military Competency Practice Exam

What are the oxygen requirements when operating at cabin pressure altitudes above 15,000 feet MSL?

1. Flight crew only needs oxygen

2. Passengers need no oxygen

3. Flight crew must use oxygen and passengers must be provided with oxygen

4. Only certain passengers need oxygen

The correct answer is: Flight crew must use oxygen and passengers must be provided with oxygen

When operating at cabin pressure altitudes above 15,000 feet Mean Sea Level (MSL), the requirements for oxygen are established to ensure the safety and well-being of everyone on board. Above this altitude, the partial pressure of oxygen decreases significantly, which can lead to hypoxia, a condition caused by inadequate oxygen supply to the body. In this context, the requirement that flight crew must use oxygen is critical as they are responsible for the safe operation of the aircraft. Their fitness to fly is paramount, and using supplemental oxygen ensures they maintain cognitive and physical capabilities. Moreover, providing oxygen to passengers is equally important, as at altitudes exceeding 15,000 feet, even healthy individuals can start to experience symptoms of hypoxia. By providing oxygen to passengers, airlines are ensuring that they can breathe comfortably and avoid any adverse effects on their health while in flight. Therefore, the correct answer reflects the necessary precautions that must be taken for both crew and passengers to maintain safety and comfort during flight at such elevated altitudes.