Question

What is a turboprop?

(a) It is a combination of turbojet and ramjet

(b) It is a combination of turbojet and turbofan

(c) It is a combination of turbojet and scramjet

(d) It is a combination of turbojet and propeller engine

This question was addressed to me by my college professor while I was bunking the class.

This intriguing question comes from Cruising Performance topic in portion Cruising Performance of Aircraft Performance

Answer 1

Right option is (d) It is a combination of turbojet and propeller engine

Easy explanation: Turbo-prop is a combination of turbojet and propeller engine. The power-plants used in turboprop are mixed power-plants i.e. it is a combination of both thrust producing engine and power producing engine.