When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is _______________?

Related Mcqs:

LMTD can’t be used as such without a correction factor for the_________________?

A. Multipass heat exchanger B. Baffled heat exchanger C. Condensation of mixed vapour in a condenser D. All A. B. and C....

In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?

A. Geometric B. Arithmetic C. Logarithmic D. Either A., B. or C....

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?

A. Increase B. Decrease C. Remain unchanged D. Either increase or decrease; depends on the coolant flow rate...

An ejector is used to__________________?

A. Increase pressure B. Increase temperature C. Remove condensate D. None of these...

For what value of Prandtl number, the Col-burn analogy is valid ?

A. 0.06 to 120 B. 0.6 to 120 C. 1 to 103 D. 1 to 50...