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Heat Transfer

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

< 0.1
> 0.6
0.5
< 0.5

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Heat Transfer
In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate.

May increase or decrease, depends on the type of baffle
Increases
Does not affect
Decreases

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Heat Transfer
Intermittant tube cleaning is possible to be done in case of a __________ evaporator.

Basket type
Horizontal tube
None of these
Calendria

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Heat Transfer
In which mode of heat transfer, the Biot number is important?

Natural convection
Forced convection
Transient heat conduction
Radiation

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Heat Transfer
The equation, Nst = f/2, is the __________ analogy.

Prandtl
Reynolds
Colburn
None of these

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Heat Transfer
Circulation pump is located below the evaporater to

None of these
Avoid cavitation
Avoid frequent priming
Create more suction head

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