The sum of reflectivity and absorptivity for an opaque body is equal to____________________?

Related Mcqs:

In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass _____________ through the heat exchanger ?

A. Once B. Twice C. Thrice D. Four times...

The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is ________________?

A. 2 B. 1/2 C. 4 D. 1/4...

At constant temperature, the thermal conductivities of gases _____________ with rise in pressure?

A. Decrease B. Increase C. Remain unchanged D. May increase or decrease; depends on the pressure...

Which one gives the monochromatic emissive power for black body radiation ?

A. Planck’s law B. Kirchhoff’s law C. Wien’s law D. Stefan-Boltzmann law...

Pick out the wrong statement ?

A. Economy of a multiple effect evaporator is not influenced by the boiling point elevation B. Two identical cubes of iron and copper will have the same heat content under the same conditions of temperature C. Double pipe heat exchangers are mostly used in the field of refrigeration D. Finned tube heat exchangers are suitable … Pick out the wrong statement ?Read More...