Question

Mass flow rate will be affected by __________

(a) altitude

(b) weight of the aileron

(c) induced drag only

(d) longerons weight

This question was addressed to me during a job interview.

Query is from Propulsion in section Propulsion of Aircraft Design

Answer 1

Correct choice is (a) altitude

Explanation: Typically, Mass flow rate can be expressed as follows: mass flow rate = density*Area*Velocity. Density is function of altitude. It depends on the altitude and changes as per the international standard atmosphere. Hence, if density varies then, the mass flow rate will also vary. Hence, we can say that the mass flow rate is affected by the altitude.