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Heat Transfer

Heat Transfer
__________ chart is known as transient heat conduction chart.

Mollier's
Dirhing's
Heisler's
Cox

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Heat Transfer
Economy of a multiple effect evaporator depends upon the

Heat balance consideration
Neither A nor B
Rate of heat transfer
Both A and B

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Heat Transfer
Multiple effect evaporation accounts for

Lower operating costs
Investment economy
None of these
Steam economy

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Heat Transfer
Value of Nusselt number [Nu = (hD/k)] for the heat transfer by conduction from a droplet or a spherical particle to a surrounding stagnant film is

10
100
0.5
2

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Heat Transfer
In case of a vertical tube evaporator, with increase in the liquor level, the __________ is increased.

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

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Heat Transfer
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

continues to increase
continues to decrease
goes through a maximum.
goes through a minimum

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