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Mass Transfer

Mass Transfer
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)

ML/G
LG/m
L/mG
G/mL

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Mass Transfer
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

More than the wet bulb
Equal to the dry bulb
Equal to the wet bulb
Less than the wet bulb

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Mass Transfer
COâ‚‚ can be absorbed by

Alumina
Cold Ca(OH)â‚‚
Heated charcoal
Hot cupric oxide

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Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

1
0.24
600
3.97

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Mass Transfer
Capacity of a rotary dryer depends on its

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

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Mass Transfer
Equilibrium-moisture curves of different solids

Are same
Are different
Depend on the humidity of the gas
None of these

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