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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Clarification
Sedimentation
Classification
Leaching

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Decreases
Depends on the pressure of the system
Increases
Remains unchanged

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Mass Transfer
Make up water is supplied during cooling tower operation to compensate for water losses due to

All of these
Blowdown
Entrainment
Evaporation

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Mass Transfer
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Decrease
Data insufficient, can't be predicted
Remain same
Increase

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Mass Transfer
Very tall packed towers are divided into series of beds to

Reduce liquid hold-up
Avoid channelling
Avoid flooding
Reduce the overall pressure drop

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Mass Transfer
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.

Relative humidity
None of these
Wet bulb temperature
Partial pressure of water vapor

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