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Mass Transfer

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

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

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Mass Transfer
Perforated plate towers are unique for solvent extraction because, they provide

Repeated coalescence & redispersion of the drop phase
None of these
Better contact of the phase
Higher contact area

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Mass Transfer
Diameter to height ratio for a rashig ring is

1
5
2
0.5

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Mass Transfer
Alcohol is dehydrated using __________ distillation.

Azeotropic
Steam
Extractive
Molecular

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Mass Transfer
Which of the following remains constant during evaporative cooling process with recirculated water supply?

Relative humidity
Partial pressure of vapour
None of these
Wet bulb temperature

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Mass Transfer
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

4
2
3
1

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