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Mass Transfer

Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

0.5
0.05
50
5

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Mass Transfer
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

Neither A nor B
Both A & B
Constant rate
Unsaturated surface

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Mass Transfer
The unit of volumetric diffusivity is

Cm/sec
Cm²/sec
Cm³/sec
Cm²/seC₂

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Mass Transfer
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

2
0.5
∞
1

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Mass Transfer
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

> 8:1
> 4 :1
< 6:1
< 8 : 1

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Mass Transfer
_______ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

Stanton
Sherwood
Peclet
Lewis

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