Multiple choice

Mach meter relates to the combination of which instruments?

  1. ASI and VSI

  2. ASI and altimeter

  3. ASI and Directional Gyro

  4. All of the above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A Mach meter combines the functions of the Airspeed Indicator (ASI) and altimeter. It indicates Mach number (ratio of true airspeed to speed of sound) by comparing airspeed data with static pressure (altitude) data, as the speed of sound varies with altitude.