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Mass Transfer

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

3 to 4
5
1.2 to 1.5
2.5 to 3

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Mass Transfer
Which of the following remains constant during sensible cooling process ?

Partial pressure of vapour
Specific humidity & Partial pressure of vapour
Specific humidity
None of the listed here

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Mass Transfer
______ extractor uses centrifugal force for separating the two phases.

Schiebel
Podbielniak
None of the listed here
Treybal

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Mass Transfer
Boiling point diagram is not affected by the ambient

Temperature
Both B and C
Humidity
Pressure

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Mass Transfer
The unit of volumetric diffusivity is

Cm²/sec
Cm²/seC₂
Cm/sec
Cm³/sec

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Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

44119
90-100
30-40
70-80

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