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Mass Transfer

Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Unbound
Bound
Critical
Equilibrium

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Mass Transfer
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Increase
Remain same
Data insufficient, can't be predicted
Decrease

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

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Mass Transfer
Boiling point diagram is

A plot of temperature vs. vapour composition
A plot of temperature vs. liquid composition
Affected by pressure
Not affected by pressure

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Mass Transfer
Molecular seives are porous

Alumina
None of these
Silica
Synthetic zeolites crystals/metal alumino-silicates

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Mass Transfer
HETP is numerically equal to HTU, only when the operating line

And equilibrium lines are parallel
Is far from the equilibrium line
Lies below the equilibrium line
Lies above the equilibrium line

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