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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
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate.

Across
Both A & B
Above
Neither A nor B

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Mass Transfer
Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.

None of the listed here
Penetration
Surface renewal
Film

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Mass Transfer
Radioactive nuclear waste is treated in

Bollman extractor
Mixer-settler extractor
Rotating-disc contactor
Pulsed column extractor

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Mass Transfer
Which is the controlling factor for a drum drier?

Both A & B
Neither A nor B
Heat transfer
Diffusion

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Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Maximum permissible
Minimum
Total
Operating

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