Total emissivity of polished silver compared to black body is___________________?

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...

Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of__________________?

A. 0.002 B. 0.02 C. 0.01 D. 0.1 E. 0.5...

Film coefficient is defined as Inside diameter of tube________________?

A. Equivalent thickness of film B. Thermal conductivity Equivalent thickness of film Specific heat x Viscocity C. Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity D. Film coefficient x Inside diameter Thermalconductivity E. none of the above...

The concept of overall coefficient of heat transfer is used in case of heat transfer by________________?

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

A perfect black body is one which_______________?

A. is black in colour B. reflects all heat C. transmits all heat radiations D. abslprbs heat radiations of all wave lengths falling on it E. fully opaque...