SACAA ATPL Meteorology Practice Questions - SACAA Airline Transport Pilot Licence (Aeroplane) Meteorology Examination Exam

What are the two predominant gases that make up approximately 99% of the dry atmosphere by volume?

Nitrogen (78%) and Oxygen (21%) Oxygen (78%) and Nitrogen (21%) Nitrogen (78%) and Argon (21%) Oxygen (50%) and Carbon Dioxide (49%)

Correct Answer:

Nitrogen (78%) and Oxygen (21%)

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