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Mass Transfer

Mass Transfer
Rayleigh's equation applies to __________ distillation.

Flash
Continuous
Steam
Differential

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Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

70-80
30-40
90-100
44119

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Mass Transfer
Surface renewal model of mass transfer was enunciated by

Stefan
Toor and Marchello
Fick
Danckwerts

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

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

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Mass Transfer
The process employing desorption of the absorbed solute by a solvent is called

Reverse osmosis
Osmosis
Sublimation
Elution

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Mass Transfer
Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)

(4De/πt)1/2
(4De/t)
(De/t)1/2
(De.t)1/2

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