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Mass Transfer

Mass Transfer
In paper industry, paper is dried in a __________ dryer.

Festoon
Heated cylinder
Conveyor
Tunnel

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

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.

Surface-renewal
Penetration
Film
None of these

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Mass Transfer
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

Porosity
Size
Cost
Durability

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Mass Transfer
Weight of 1 m³ of humid air as compared to 1 m³ of dry air, under the same conditions, is

Less
Same
More
Unpredictable

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Mass Transfer
Reverse osmosis is also called

Dialysis
Ultrafiltration
Electrodilysis
Diffusion

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