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Heat Transfer

Heat Transfer
Removal of __________ heat is involved in the condensation of a vapor under saturated conditions.

Super
Sensible
Both B & C
Latent

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Heat Transfer
Shell side pressure drop in a shell and tube heat exchanger does not depend upon the

None of these
Baffle spacing & shell diameter
Tube diameter & pitch
Viscosity, density & mass velocity of shell side fluid

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Heat Transfer
For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is

Nu = 2Gz0.5
Nu = Gz
Nu = Gz
Nu = 0.023 Re0.8 . Pr0.4

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Heat Transfer
Reason for operating an evaporator in multiple effect is to secure

Increased capacity
Increased steam economy
Decreased steam consumption
Both A and B

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Heat Transfer
The number of kg vaporised per kg of steam fed to the evaporator is defined as

Capacity
Economy
Rate of vaporisation
Rate of evaporation

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Heat Transfer
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

Greater than
Is same as
Lower than
Half

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