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Mass Transfer

Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Bound
Unbound
Critical
Equilibrium

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Mass Transfer
Diameter to height ratio for a rashig ring is

1
5
0.5
2

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Mass Transfer
In McCabe-Thiele method, at infinite reflux ratio

The overhead product is minimum
Both the operating lines coincide with diagonal
Both A & B
Neither A nor B

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T³
T²
T

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Mass Transfer
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

1 and 0
< 1 and ≈ 1
>1 and ≈ 1
0 and ≈ 1

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

F/2
1/f
2f
F

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