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Mass Transfer

Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X - 1)/X
X/(X - 1)
X/(X + 1)
(X + 1)/X

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Mass Transfer
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

Sensible heat
Latent heat
Humid heat
Specific heat

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Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

?
None of these
1

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Mass Transfer
Air at a particular humidity is heated in a furnace. The new dew point

Depends on the extent of heating
Decreases
Increases
Remain unchanged

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Mass Transfer
NSc/NPr is called the

Sherwood number
Psychrometric ratio
Lewis number
Stantan number

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Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Pressure rises
Temperature rises
Temperature falls
Pressure falls

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