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Mass Transfer

Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

F/2
1/f
F
2f

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Mass Transfer
Which of the following has the same dimension as mass diffusivity?

Kinematic viscosity
Both Momentum flux & Kinematic viscosity
Momentum flux
Thermal diffusivity

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

10
1
0.1
0.01

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

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

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Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

< 100
> 100
None of these
100

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Mass Transfer
Drying operation under vacuum is carried out to

Dry those materials which have very high unbound mositure content
Reduce drying temperature
Dry materials having high bound moisture content
Increase drying temperature

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