Question

What are the percentages of nitrogen, oxygen, argon and carbon dioxide in atmosphere?

(a) 78%, 21%, 0.9%, 0.03%

(b) 75%, 24%, 0.7%, 0.03%

(c) 71%, 28%, 0.9%, 0.04%

(d) 75%, 24%, 0.9%, 0.05%

This question was addressed to me during an interview.

Question is from Characteristics of Atmosphere in portion Atmosphere and Air Data Measurement of Aircraft Performance

Answer 1

Right choice is (a) 78%, 21%, 0.9%, 0.03%

The best I can explain: The percentages of nitrogen, oxygen, argon and carbon dioxide in atmosphere are 78%, 21%, 0.9%, 0.03%. The atmosphere also consists of other inert gases, dust particles, water vapor and moisture in minute quantities.