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Mass Transfer

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

Fluidised bed
Tray
Rotary
None of these

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Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Long tube
Short tube
Falling film
Vacuum

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Mass Transfer
In gas-liquid contact operation, the number of ideal stages, N = (xa - xb)/(xb - x*b) . This is true when the stripping factor 'S' is

S < 1
S = 1
S > 1
S = ∞

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Mass Transfer
The rate of mass transfer is not dependent upon the

Interfacial surface exposed between the phases
None of these
Degree of dispersion of one fluid in the other
Both A & B

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Mass Transfer
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

None of these
Freeze
Indirect tray
Spray

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Mass Transfer
The most economical range of absorption factor is

1.25 to 2
5 to 10
2 to 2.5
2.5 to 3

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