A hot body will radiate heat most rapidly, if its surface is___________________?

Related Mcqs:

For a laminar flow of fluid in a circular tube, ‘h1’ is the convective heat transfer co-efficient at velocity ‘V1’. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is________________?

A. 1.26 h1 B. 0.794 h1 C. 0.574 h1 D. 1.741 h1...

What is the geometric mean of two heat transfer areas A1 and A2 ?

A. √(A1 . A2) B. √(A1 + A2) C. ½ √(A1 . A2) D. 2 √(A1 . A2)...

In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used________________?

A. In low range of temperature differences B. In high range of temperature differences C. Because of its low cost D. To prevent corrosion of the tube bundles...

In Biot number, the characteristic length used is the ratio of the _______________ of the solid?

A. Volume to surface area B. Perimeter to surface area C. Surface area to volume D. Surface area to perimeter...

Nusselt number is the ratio of the ____________________?

A. Temperature gradient of the wall to that across the entire pipe B. Temperature difference to the temperature gradient at the wall C. Heat flux at the wall to that across the entire pipe D. None of these...