Question

What is meant by airspeed?

(a) The relative velocity between the aircraft and the air mass in which the aircraft is flying

(b) The ratio of velocity between the aircraft and the air mass in which the aircraft is flying

(c) The relative acceleration between the aircraft and the air mass in which the aircraft is flying

(d) The ratio of velocity between the aircraft and the ground in which the aircraft is flying

I got this question during an interview.

Question is from Measurement of Airflow Characteristics topic in section Atmosphere and Air Data Measurement of Aircraft Performance

Answer 1

The correct choice is (a) The relative velocity between the aircraft and the air mass in which the aircraft is flying

The best I can explain: Airspeed is the relative velocity between the aircraft and the air mass in which the aircraft is flying. The unit of airspeed is knot. There are different types of airspeeds. They are ground speed, true airspeed, calibrated airspeed and indicated airspeed.