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Mass Transfer

Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.83
Re
Re0.33
Re0.53

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Mass Transfer
Sand is dried in foundaries in a___drier.

Spray
Fluidisedbed
Rotary
Vacuum

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Reduce liquid hold up
Minimise the overall pressure drop
Avoid flooding
Avoid channeling

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Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

> 1
1
< 1

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Mass Transfer
Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

Less than
Equal to
Either A or B; depends on the solid
More than

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ 1/P1.5
D ∝ 1/P
D ∝ P0.5
D ∝ 1/P0.5

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