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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
> 1
0.5
< 1

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Mass Transfer
When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

Natural
Induced
None of these
Forced

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Mass Transfer
Schmidt number is given by

Re.Pe
Sh x Pe
Μ/ρDAB
Re/Pe

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Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 - Ro) = Ro/Ri
(1 + Ro) = Ro/Ri
(1 + Ri) = Ro/Ri
(1 - Ri) = Ro/Ri

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Mass Transfer
HETP is numerically equal to HTU, only when the operating line

Is far from the equilibrium line
Lies below the equilibrium line
Lies above the equilibrium line
And equilibrium lines are parallel

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Mass Transfer
Molecular seives are porous

Synthetic zeolites crystals/metal alumino-silicates
None of these
Silica
Alumina

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MORE MCQ ON Mass Transfer

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