Question

Which of the following altitude is measured by the pitot-static tube?

(a) Standard altitude

(b) Constant altitude

(c) Pressure altitude

(d) Total altitude

I had been asked this question during a job interview.

My doubt is from Air Data Equations topic in portion Air Data Systems, Altitude and Heading Reference of Avionics

Answer 1

Correct answer is (c) Pressure altitude

To elaborate: Pressure altitude, as the name suggests, is the altitude derived from pressure measurements. It is measured from the static port of the pitot-static probe. The static pressure of air varies with altitude with approximately 101Kpa at sea level.