AerodynamicsQuestion 413 of 934

Air temperature stays constant and the air pressure doubles. What happens to the air density?

  1. It is cut in half
  2. It doubles
  3. It increases by a factor of four
  4. It stays the same
Show answer

Correct answer: It doubles

Density is directly proportional to pressure at constant temperature. Doubling the pressure doubles the density.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 4: Principles of Flight — Effect of Pressure on Density, page 91

Practice aerodynamics

Questions last reviewed: 18 October 2026