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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Clarification
Sedimentation
Leaching
Classification

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Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

F
F/2
1/f
2f

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

Bubble
Tray
Packed
Spray

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Mass Transfer
Milk is dried usually in a __________ dryer.

Spray
Freeze
Tray
Rotary

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T0.5
D ∝ T
D ∝ T1.5
D ∝ T2

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Mass Transfer
Which is the controlling factor for a drum drier?

Heat transfer
Neither A nor B
Diffusion
Both A & B

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