USPA Skydiving B License Practice test

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Prepare for the USPA Skydiving B License Test with our interactive quiz. Challenge your knowledge with multiple choice questions, detailed explanations, and helpful hints. Start your journey to mastering the skies!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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At what altitude must supplemental oxygen be provided to aircraft occupants in an unpressurized cabin?

12,000 feet MSL
15,000 feet MSL
18,000 feet MSL
20,000 feet MSL

The correct answer is: 15,000 feet MSL

Supplemental oxygen must be provided to aircraft occupants in an unpressurized cabin at 15,000 feet Mean Sea Level (MSL) because this altitude is the point at which the risk of hypoxia increases significantly. At 15,000 feet MSL, the partial pressure of oxygen is lower than at sea level, which can lead to insufficient oxygen saturation in the blood for the body to function properly. Regulatory guidelines are in place to ensure the safety of individuals flying at these altitudes, as cognitive and physical performance can be impaired without supplemental oxygen. This threshold is critical for both crew and passengers to maintain alertness and reaction time during flight operations. At altitudes higher than this, such as 18,000 feet or above, additional oxygen is required for longer durations, further emphasizing the importance of proper oxygen management in aviation safety.