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Mass Transfer

Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Tray
Packed
Bubble
Spray

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

All of the listed here
High maintenance cost
High labour cost & low heat economy
Non-uniform & low production rate

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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
Evaporation
Entrainment
Blowdown

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Mass Transfer
Degree of freedom for leaching and solvent extraction process is

3
1
2

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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
Large scale drying of sugar is done in a __________ dryer.

Tray
Truck
Spouted bed
Rotary

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