Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

Humidified at constant wet bulb temperature
Humidified with wet bulb temperature decreasing
None of these
Dehumidified

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Mass Transfer
Bollman extractor

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

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