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Mass Transfer

Mass Transfer
Paper industry employs __________ driers.

Fluidised bed
Spray
Cylinder
Rotary

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Mass Transfer
Sodium bicarbonate is produced during soda ash manufacture using a __________ tower.

None of these
Baffle
Plate
Packed

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Mass Transfer
Under conditions of flooding in packed tower, the gas pressure drop

Increases rapidly
Remains constant
Is maximum
Decreases rapidly

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Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

F
F/2
1/f
2f

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Mass Transfer
Antibiotics are best handled in a

Podbielniak extractor
Rotating disc contactor
Pulsed column extractor
Sieve tray contractor

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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)

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

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