At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?

Related Mcqs:

‘Duhring’s plot’ is of use in_________________?

A. Extractive distillation B. Evaporation C. Leaching D. Absorption...

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...

In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

A. Velocity of circulation B. Liquor-film co-efficient C. Both A. and B. D. Neither A. and B....