Dry air is a mixture of gases. Their volume percentage is about:

Question

Question ATPL - Airline Transport Pilot license - Human Performance and Limitations

QuizVDS · Accepted Answer

21% oxygen,78% nitrogen, 1% other gases

QuizVDS · Answer

18% oxygen, 80% nitrogen, 2% other gases

QuizVDS · Answer

25% oxygen, 74% nitrogen, 1% other gases

QuizVDS · Answer

19% oxygen, 80% nitrogen, 1% other gases

Id 442 - ATPL - Dry air is a mixture of gases. Their volume percentage is about: