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Mass Transfer

Mass Transfer
Selectivity of the solvent used in solvent extraction should be

1
> 1
< 1

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Mass Transfer
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

15 min
51 min
71 min
94 min

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Mass Transfer
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Equal to the dry bulb
Less than the wet bulb
Equal to the wet bulb
More than the wet bulb

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

Both B and C
Wet bulb temperature
Relative humidity
Partial pressure of vapour

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Mass Transfer
Swenson-Walker crystalliser is a __________ unit

Semi-batch
Continuous
Batch
Cooling (adiabatic)-cum-evaporation

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Mass Transfer
The value of NA/(NA + NB) for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is

1
0.5
2
∞

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