Mechanical and Materials Engineering 2273A/B Lecture 20: HT from Extended Surfaces

Match the heat transfer process in ‘A B C’ to ‘P Q R.’

1. Conduction

2. Convection 

3. Radiation 

 P. Heat transfer from one molecule to another molecule

 Q. Heat transfer does not require a medium

 R. Heat transfer through a fluid.

Which of the following primarily involves heat transfer by convection?

1. Heat transfer from hand to the ice

2. Heating of surface of a boiler

3. Heating of liquid from a heat source

4. Heating of roads by Sun

Which best illustrates the way in which radiation transfers thermal energy?

1. Radiation heat transfer does not require a medium

2. Radiation transfers heat from a warmer object to same temperature object

3. Radiation transfer heat through a matter

4. Radiation is not possible in vacuum