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Mass Transfer

Mass Transfer
Paper industry employs __________ driers.

Rotary
Cylinder
Fluidised bed
Spray

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Mass Transfer
At minimum reflux ratio for a given separation

Number of plates is zero
Number of plates is infinity
Separation is most efficient
Minimum number of the theoretical plates is required

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Mass Transfer
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

78
50
100
None of these

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T1.5
D ∝ T0.5
D ∝ T2
D ∝ T

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Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.53
Re0.83
Re0.33
Re

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Film
None of these
Surface renewal
Penetration

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