Heat Transfer Mock Test 1

1. The average thermal conductivities of water and air conform to the ratio

2. Mark the matter with least value of thermal conductivity

3. Heat transfer in a long, hollow cylinder which is maintained at uniform but different temperatures on its inner and outer surfaces may be assumed to be taking place in which direction?

4. Transmission of heat i.e. molecular is smallest in case of

5. A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is – 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow per m² based on inside area

6. The relation Ϫ² t =0 is referred to as

7. The rate of convective heat transfer between a solid boundary and adjacent fluid is given by

8. Choose the false statement

9. Which of the following is an example of steady state heat transfer?

10. Identify the very good insulator