Question

_________ is the currents produced only by temperature difference.

(a) Natural convection

(b) Forced convection

(c) Conduction

(d) Radiation

This question was addressed to me in examination.

This question is from Heat Convection topic in division Heat Transfer Theory of Food Processing Unit Operations

Answer 1

Correct answer is (a) Natural convection

For explanation: Natural convection is a type of convection where the heat transfer takes place only due to density difference that leads to the temperature difference in the fluid. The gravitational force is the main driving force in the natural convection.