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Mass Transfer

Mass Transfer
Diameter to height ratio for a rashig ring is

1
2
0.5
5

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Mass Transfer
The dew point of a saturated gas phase equals the __________ temperature.

None of these
Wet bulb
Gas
Room

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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 )

T³
T
√T
T²

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Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Unknown
Calculated
Not required
Known

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Mass Transfer
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will

Decrease
Increase
Depend on saturated boiling point; may increase or decrease
Remains same

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Mass Transfer
Removal of __________ exemplifies an adsorption unit operation.

Ammonia from coke oven gas
Uranium from its ore
None of the listed here
Water from petrol

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