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

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Mass Transfer
Danckwerts developed the __________ theory.

Surface renewal
None of these
Film
Penetration

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Mass Transfer
For a distillation column operating at minimum reflux, the

Reflux ratio will be maximum
Concentration of liquid and vapour leaving a plate will be same
Number of plates required will be maximum
None of these

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Mass Transfer
Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

None of the listed here
Electrical resistance
Strength
Thermal conductivity

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Mass Transfer
Gaseous diffusion co-efficient increases with increase in the

Temperature
Both Pressure & Temperature
None of the listed here
Pressure

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Mass Transfer
Separation of __________ employs gaseous diffusion process.

Isotopes of uranium
SO₂ and air
Isotopes of helium
N₂ and O₂ from air

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