Question

What is conduction?

(a) Conduction is heat transfer by means of molecular agitation

(b) Conduction is mass transfer by means of molecular agitation

(c) Conduction is heat transfer by means of electron agitation

(d) Conduction is heat transfer by means of atom agitation

I got this question during an interview.

My question is from Heat Transfer in Evaporators in chapter Evaporation of Food Processing Unit Operations

Answer 1

The correct answer is (a) Conduction is heat transfer by means of molecular agitation

Best explanation: It is heat transfer by molecular agitation within a material without any motion of the material as a whole. If one end of a metal rod is heated, the energy transfers toward the colder end as the higher speed particles collides with the slower ones with a net transfer of energy to the slower ones.