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Mass Transfer

Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

2.5 to 3
1.2 to 1.5
3 to 4
5

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Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

0 < f < 1
F > 1
F = 1
F < 1

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Mass Transfer
Smoke is an example of

Solid dispersed in gas
Gas dispersed in liquid
Liquid dispersed in gas
Solid dispersed in liquid

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Mass Transfer
When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

Forced
None of these
Natural
Induced

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Mass Transfer
Paper industry employs __________ driers.

Spray
Cylinder
Fluidised bed
Rotary

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Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

0.8 to 1.2
2.5 to 3.5
0.5 to 0.8
1.25 to 2.0

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