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

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Mass Transfer
Capacity of a rotary dryer depends on its

Both Inclination with ground surface & R.p.m
None of the listed here
Inclination with ground surface
R.p.m

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Mass Transfer
Minimum reflux ratio in a distillation column results in

Optimum number of trays
Minimum number of trays
Minimum reboiler size
Maximum condenser size

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Mass Transfer
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

F/(FG.a)
(G.a)/FG
FG/(G.a)
L/(FG.G)

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Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Known
Calculated
Unknown
Not required

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Mass Transfer
In rectifying section of a continuous distillation column, the

Vapour is enriched with low boilers
None of these
Vapour is enriched with high boilers
Liquid is stripped of high boilers

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