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Mass Transfer

Mass Transfer
Tea percolation employs

None of these
Absorption
Liquid-liquid extraction
Leaching

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Mass Transfer
The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Momentum diffusivity to the thermal diffusivity
None of these
Thermal diffusivity to the mass diffusivity
Momentum diffusivity to the mass dif-fusivity

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Mass Transfer
Critical humidity of a solid salt means the humidity

Above Which it will always become dry and below which it will always stay damp
Both A and B
Below which it will always stay dry
Above which it will always become damp

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Mass Transfer
For continuous drying of grannular or crystalline material, the dryer used is the __________ dryer.

Rotary
Tunnel
None of these
Tray

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Mass Transfer
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

Major decrease in the number of
Marginal decrease in the number of
None of the listed here
No change in theoretical

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Mass Transfer
The caking of crystals can be prevented by

Both A and C
Coating the product with inert material
Maintaining high critical humidity
Maintaining low critical humidity

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