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Mass Transfer

Mass Transfer
Diameter to height ratio for a rashig ring is

1
2
5
0.5

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Mass Transfer
With increase in the concentration of the adsorbate, the integral heat of adsorption

Remains unchanged
May increase or decrease ; depends on the type of adsorbate
Decreases
Increases

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Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Pressure rises
Temperature falls
Pressure falls
Temperature rises

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Mass Transfer
Mass transfer co-efficient is defined as

Co-efficient = Flux/concentration difference
None of the listed here
Flux = Co-efficient/concentration difference
Flux=concentration difference/co-effi-cient

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Raschig
Cross-partition
Lessing
Single spiral

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Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

?
1
None of these

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