A grey body is one whose absorptivity _________________?

Related Mcqs:

Heat transfer takes place as per ________________?

A. zeroth law of thermodynamics B. first law of thermodynamic C. second law of the thermodynamics D. Kirchoff’s law E. Stefan’s law...

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...

Thermal diffusivity of a substance is ____________________?

A. proportional of thermal conductivity B. inversely proportional to k C. proportional to (k) D. inversely proportional to k2 E. none of the above...

The value of Prandtl number for air is about _______________________?

A. 0.1 B. 0.3 C. 0.7 D. 1.7 E. 10.5...

Depending on the radiating properties, body will be transparent when________________?

A. p = 0, x = 0 and a = 1 B. p=l,x = 0,anda = 0 C. p = 0, T= l,anda = 0 D. X = 0, a + p = 1 E. a = 0,x + p= 1...