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Mass Transfer

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

2f
F
1/f
F/2

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Mass Transfer
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

< 8 : 1
< 6:1
> 4 :1
> 8:1

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Mass Transfer
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.

Bound
Critical
Unbound
Free

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Mass Transfer
The expression, y(1 - x)/x(1 - y) is for

Relative volatility
Selectivity
Murphree efficiency
Absorption factor

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Mass Transfer
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

Increase
Remain unchanged
Can either increase or decrease, depends on the system
Decrease

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Mass Transfer
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Sherwood number
Schmidt number
Lewis number
Prandtl number

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