Questions: FAR 91.211 Question: At what cabin pressure altitude do all occupants need to be provided with supplemental oxygen? A. 10,000 feet MSL B. 15,000 feet MSL C. 20,000 feet MSL D. 25,000 feet MSL Rayni Rister

FAR 91.211 Question: At what cabin pressure altitude do all occupants need to be provided with supplemental oxygen? A. 10,000 feet MSL B. 15,000 feet MSL C. 20,000 feet MSL D. 25,000 feet MSL Rayni Rister
Transcript text: FAR 91.211 Question: At what cabin pressure altitude do all occupants need to be provided with supplemental oxygen? A. 10,000 feet MSL B. 15,000 feet MSL C. 20,000 feet MSL D. 25,000 feet MSL Rayni Rister
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Solution

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The answer is B: 15,000 feet MSL.

Explanation for each option: A. 10,000 feet MSL - Incorrect. According to FAR 91.211, supplemental oxygen is required for the flight crew at cabin pressure altitudes above 12,500 feet MSL after 30 minutes, but not for all occupants. B. 15,000 feet MSL - Correct. FAR 91.211 states that at cabin pressure altitudes above 15,000 feet MSL, each occupant must be provided with supplemental oxygen. C. 20,000 feet MSL - Incorrect. The requirement for all occupants to have supplemental oxygen starts at 15,000 feet MSL, not 20,000 feet MSL. D. 25,000 feet MSL - Incorrect. The requirement for all occupants to have supplemental oxygen starts at 15,000 feet MSL, not 25,000 feet MSL.

Summary: According to FAR 91.211, all occupants need to be provided with supplemental oxygen at cabin pressure altitudes above 15,000 feet MSL.

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