The interchange factor for radiation heat transfer from surface ‘x’ to surface ‘y’ in case of an infinite parallel planes with emissivities εx & εy is given by_______________?

Related Mcqs:

With increase in temperature, the thermal conductivity of most liquids_________________?

A. Increases B. Decreases C. Remain same D. First increases upto a certain temperature and then becomes constant...

Stefan’s block body radiation law can also be derived from ______________ law?

A. Kirchoff’s B. Planck’s C. Fourier’s D. None of these...

Open pan evaporators are preferred to be used, when the solution to be concentrated is_________________?

A. Scaling B. Highly viscous C. Corrosive D. Salty...

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

A. Thermal conductivity B. Thickness C. Temperature difference D. Heat transfer area...

The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?

A. Solution has an elevation of boiling point B. Evaporators operate under vacuum C. Evaporators operate at atmospheric pressure D. None of these...