Multiple choice

The expression March 2 Applies to

  1. Subsonic aircraft

  2. Supersonic aircraft

  3. Light aircraft

  4. It has nothing top do with aircraft
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mach 2 refers to twice the speed of sound, which only supersonic aircraft can achieve. Subsonic aircraft fly below the speed of sound (Mach 1), and 'light aircraft' refers to weight classification, not speed. The term 'Mach number' is specifically used to express the ratio of flow velocity to the speed of sound.

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