Question

What is the height called when the standard temperatures are used?

(a) Standard altitude

(b) Constant altitude

(c) Pressure altitude

(d) Total altitude

This question was posed to me in an interview.

The doubt is from Air Data Equations in chapter Air Data Systems, Altitude and Heading Reference of Avionics

Answer 1

Correct answer is (c) Pressure altitude

The best explanation: The altitude at which the standard temperatures are used is called the pressure altitude. Pressure altitude is the altitude of the aircraft above sea level. It always takes it’s reference as sea level.