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Mass Transfer

Mass Transfer
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

4
1
2
3

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Mass Transfer
Separation of two volatile liquids by distillation makes use of their

Solubility
Relative volatility
Density difference
Selectivity

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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
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of Hâ‚‚/ky.Cz is around

0.72
0.24
1
0.6

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Mass Transfer
Humid volume, at a given temperature is a/an __________ function of humidity.

Exponential
Inverse
Logarithmic
Linear

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

More than
Equal to
Half
Twice

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