Question

In a liquid, heat is transferred mainly by

• A. conduction
• B. convection
• C. radiation
• D. conduction and convection both

Answer 1

The correct option is B convection

Convective heat transfer occurs within a fluid itself and it is carried out by transfer of one fraction of the fluid to the remaining portion. Transfer of molecules occurs during convection. Since movement of particles constitutes convection, it is the macro form of heat transfer. Also convection is only [possible in fluids where the particles can moved easily and the rate of convective heat transfer depends on the rate of flow to a great extend