Mass Transfer
Bollman extractor

Is used for extraction of oil from oilseed
Is a centrifugal extractor
Employs only counter-current extraction
Is a static bed leaching equipment

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Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Heating and dehumidification at almost constant wet bulb temperature
None of these
Dehumidification with dry bulb temperature remaining constant
Cooling and dehumidification

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