Question

For entire period of flight exceeding ____ min at cabin-pressure- altitudes above _____ feet ASL but not exceeding _____ feet ASL, all crew mumbers and ___ percent of passengers and in any case no less than ___ passenger require oxygen for unpressurized aircraft.

Answer 1

In unpressurized aircraft, crew members and passengers may require oxygen at certain altitude thresholds. The number of crew members and passengers requiring oxygen depends on the duration of flight and the specific altitude levels.

Step-by-step explanation:

In unpressurized aircraft, when the cabin pressure altitude exceeds a certain level, crew members and passengers may require oxygen. The specific altitude thresholds depend on the situation. For the entire period of flight exceeding a certain number of minutes at cabin-pressure altitudes above a certain level but not exceeding another specific level, all crew members and a certain percentage of passengers (but no less than a certain number of passengers) need oxygen.

For example, let's say that for flights lasting more than 30 minutes at cabin-pressure altitudes above 10,000 feet ASL but not exceeding 12,000 feet ASL, all crew members and 20% of passengers, with a minimum of 5 passengers, require oxygen. So, if there are 30 passengers on the flight, 6 of them would need oxygen.