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Mass Transfer

Mass Transfer
Prandtl number for water at 20°C is about

150
0.7
7
70

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Mass Transfer
Agitator is provided in a crystalliser for

Crystal growth
Formation of nuclei
All of these
Avoiding deposition on cooler surfaces

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Mass Transfer
Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Schmidt
Peclet
Sherwood
Stanton

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Mass Transfer
During sensible cooling process

Relative humidity decreases
Both B and C
Wet bulb temperature decreases
Relative humidity increases

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

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

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Mass Transfer
At 750°K and 1 atm, the approximate value of Schmidt number for air is

1
10
0.1
0.01

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