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Mass Transfer

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

Both A & B
Neither A nor B
Across
Above

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Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.107
0.31
0.215
0.017

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Mass Transfer
In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

1/T
T²
T
√T

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Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Temperature falls
Temperature rises
Pressure rises
Pressure falls

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Mass Transfer
Which of the following same diameter columns gives lowest pressure drop per unit height?

Packed column (stacked)
Randomly packed column
Sieve-plate column
Bubble-cap column

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Mass Transfer
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if

NSc = 1
NSc = NLe
NPr = NLe
NSc = NPr = NLe

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