Emissivity of a white polished body in comparison to a black body is________________?

Related Mcqs:

When heat is Transferred by molecular collision, it is referred to as heat transfer by __________________?

A. conduction B. convection C. radiation D. scattering E. convection and radiation...

Which of the following is the case of heat transfer by radiation ___________________?

A. blast furnace B. heating of building C. cooling of parts in furnace D. heat received by a person from fireplace E. all of the above...

The amount of heat flow through a body by conduction is_______________?

A. directly proportional to the surface area of the body B. directly proportional to the temperature difference on the two faces of the body C. dependent upon the material of the body D. inversely proportional to the thickness of the body E. all of the above...

Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called__________________?

A. thermal resistance B. thermal coefficient C. temperature gradient D. thermal conductivity E. heat-transfer...

Log mean temperature difference in case of counter flow compared to parallel flow will be________________?

A. same B. more C. less D. depends on other factors E. none of the above...