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Mass Transfer

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

3
1
4
2

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Mass Transfer
Which of the following mixtures does not form an azeotrope at atmosheric pressure?

None of these
Butyl acetate-water
Methyl alcohol-acetone
Water-alcohol

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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.

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

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Mass Transfer
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.

Partial pressure of water vapor
Wet bulb temperature
Relative humidity
None of these

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Mass Transfer
Ordinary diffusion process is also called __________ diffusion.

Forced
Thermal
Concentration
Pressure

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Mass Transfer
Minimum reflux ratio in a distillation column results in

Minimum reboiler size
Optimum number of trays
Maximum condenser size
Minimum number of trays

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