Graetz number is given by__________________?

Related Mcqs:

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)...

A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when_________________?

A. CPA > CPB B. CPA < CPB C. kA < 0.5 kB D. kA >2 kB...

Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?

A. Bleed point B. Vent C. Catchall D. Baffle...

Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?

A. Liquid density B. Liquid viscosity C. Hot surface temperature D. Interfacial tension...

Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is __________________?

A. In the central core of the fluid B. Uniformly distributed throughout the fluid C. Mainly confined to a thin film of fluid near the surface D. None of these...