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HEAT TRANSFER

Heat Transfer
1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is

520
400
200
500

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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
None of these
Increases the overall heat transfer coefficient
Decreases the pressure drop

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Heat Transfer
A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is

125
133
150
160

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Heat Transfer
Corrosiveness of steam condensate is due to the presence of

Neither A nor B
Dissolved O₂
Both A & B
CO₂

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Heat Transfer
Small scale evaporation is done in a

Steam jacketed kettle
Condenser
Multiple effect evaporator
Heat exchanger

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