Question

What is the recovery factor if the total temperature is equal to the indicated total temperature?

(a) 1

(b) 2

(c) -1

(d) -2

This question was posed to me in an interview for internship.

I would like to ask this question from Measurement of Air Temperature topic in portion Atmosphere and Air Data Measurement of Aircraft Performance

Answer 1

Right choice is (a) 1

To explain I would say: The answer is 1. The expression for recovery factor is given by r=\(\frac{T_i-T}{T_t-T}\)where r is known as recovery factor, Ti is known as indicated total temperature, Tt is known as total temperature and T is known as static temperature. In the formula if Tt=Ti then

r=\(\frac{T_i-T}{T_i-T}\)

r=1.