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What is the ambient air pressure at 40,000 feet?(a) 2 bar(b) 0.2 bar(c) 20 bar(d) 0.02 barThe question was asked in semester exam.Origin of the question is Aircraft Systems and Aviation topic in division Aircraft Systems and Aviation Overview of Aircraft Maintenance

Answer»

Right choice is (b) 0.2 bar

Best explanation: The ambient AIR pressure at 40,000 feet usually FALLS to 0.2 bar. At this level, oxygen MASKS are REQUIRED to maintain a minimum partial pressure of oxygen of 0.2 bar.



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