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Mass Transfer

Mass Transfer
Sticky material can be dried in a __________ dryer.

None of these
Tray
Rotary
Fluidised bed

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Mass Transfer
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

Heat of wetting
Differential heat of adsorption
Heat of normal condensation
Integral heat of adsorption

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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)

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

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Mass Transfer
Fenske equation determines the

Maximum number of ideal plates
Height of the distillation column
Minimum number of theoretical plates
Optimum reflux ratio

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Mass Transfer
For a single component absorber, the operating line is straight only when plotted in term of __________ units.

None of these
Mole fraction
Mole ratio
Partial pressure

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Mass Transfer
Paper industry employs __________ driers.

Fluidised bed
Cylinder
Spray
Rotary

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