Question

____________ is the transfer of heat through space or matter by means other than conduction or convection.

(a) Forced

(b) Natural

(c) Radiation

(d) None of the mentioned

I have been asked this question by my school teacher while I was bunking the class.

My query is from Engine Heat Transfer topic in section Heat Rejection and Cooling of IC Engine

Answer 1

The correct answer is:

(c) Radiation

Radiation is the transfer of heat through space or matter without the need for a medium like air or fluid. It occurs through electromagnetic waves, such as infrared radiation. In the context of engines, radiation plays a role in heat dissipation from engine components, especially when they are exposed to high temperatures. This process is distinct from conduction and convection, which require a medium for heat transfer.