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Heat Transfer

Heat Transfer
Calburn analogy is applicable for the value of Prandtl number from

0.5 to 5
120 to 400
0.001 to 1
0.6 to 120

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Heat Transfer
The purpose of providing a 'catchall' in the vapor line of an evaporator is to

Regulate the vapor flow
Vent the non-condensible gases
Create vacuum
Arrest the entrained liquid

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Heat Transfer
For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it

Decreases the outlet temperature of cooling medium
Increases the overall heat transfer coefficient
Decreases the pressure drop
None of these

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Heat Transfer
In forced convection, the heat transfer depends on

mainly Gr
Re, Pr
Re, Gr
none of the listed here

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Heat Transfer
In a cooling tower, water becomes cool by

Loosing sensible heat
Loosing latent heat
Vaporisation due to heat loss to air
Heat transfer to surroundings

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Heat Transfer
If heat transfer rate varies with the time, it is termed as

Forced convection
Steady state conduction
Monochromatic radiation
None of these

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