A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________________?

Related Mcqs:

Which of the following is directly concerned with the heat transfer ?

A. Strouhal number B. Sherwood number C. Euler number D. Grashoff number...

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A. Occupies smaller space B. Is more economical C. Is easy to operate and maintain D. All A., B. and C....

In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid _______________?

A. Is inversely proportional to the resistance across which the drop occurs B. And the wall are proportional to individual resistances C. And the wall is not related D. None of these...

Radiation heat losses from satisfactorily insulated high pressure boiler may be about _____________ percent?

A. 1 B. 7 C. 18 D. 26...

Pick out the wrong statement ?

A. The controlling resistance in case of heating of air by condensing steam is in the air fil B. The log mean temperature difference (LMTD) for counter flow and parallel flow can be theoretically same when any one of the fluids (hot or cold fluid) passes through the heat exchanger at constant temperature C. In … Pick out the wrong statement ?Read More...