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Mass Transfer

Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

2.5 to 3.5
0.8 to 1.2
0.5 to 0.8
1.25 to 2.0

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Equal to
Twice
More than
Half

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Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X + 1)/X
X/(X - 1)
(X - 1)/X
X/(X + 1)

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Mass Transfer
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the

Pressure rises
Temperature falls
Temperature rises
Pressure falls

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

1/f
F
2f
F/2

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Mass Transfer
Capacity of a rotary dryer depends on its

Both Inclination with ground surface & R.p.m
Inclination with ground surface
None of the listed here
R.p.m

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