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Mass Transfer

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

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

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Surface renewal
Film
None of these
Penetration

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Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require

Low reflux ratio
High reflux ratio
Less number of trays
Small cross-section column

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Mass Transfer
Critical humidity of a solid salt means the humidity

Above Which it will always become dry and below which it will always stay damp
Both A and B
Above which it will always become damp
Below which it will always stay dry

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Mass Transfer
Boiling point diagram is not affected by the ambient

Temperature
Pressure
Both B and C
Humidity

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Mass Transfer
Drying operation under vacuum is carried out to

Dry materials having high bound moisture content
Increase drying temperature
Dry those materials which have very high unbound mositure content
Reduce drying temperature

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