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:

Steady state one dimensional heat flow by conduction as given by Fourier’s low does not assume that_______________?

A. There is no internal heat generation B. Boundary surfaces are isothermal C. Material is anisotropic D. Constant temperature gradient exists...

Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?

A. Vertical heat exchanger with steam on tube side B. Vertical heat exchanger with steam on shell side C. Horizontal heat exchanger with steam on tube side D. Horizontal heat exchanger with steam on shell side...

In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?

A. Increases B. Decreases C. Does not affect D. May increase or decrease, depends on the type of baffle...

1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is__________________?

A. 520 B. 200 C. 400 D. 500...

Removal of ______________ heat is involved in the condensation of a vapor under saturated conditions?

A. Super B. Sensible C. Latent D. Both B. & C....