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Mass Transfer

Mass Transfer
According to Poiseuille's law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)

μ
√μ
1/μ
μ²

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Mass Transfer
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)

Increases
Remains unaffected
Decreases
Increases Linearly

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Mass Transfer
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

>1 and ≈ 1
< 1 and ≈ 1
1 and 0
0 and ≈ 1

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Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

F < 1
F > 1
0 < f < 1
F = 1

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Mass Transfer
Make up water is supplied during cooling tower operation to compensate for water losses due to

Evaporation
Blowdown
Entrainment
All of these

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Mass Transfer
In most of the vacuum crystalliser, vacuum is generally produced by means of a

Suction pump
Compressed air jet
None of these
Steam jet ejector with a barometric condenser

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