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Mass Transfer

Mass Transfer
Milk is dried usually in a __________ dryer.

Tray
Rotary
Freeze
Spray

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Mass Transfer
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

Neither A nor B
Raising the temperature
Both A & B
Lowering the total pressure

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Mass Transfer
The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

T3
T
T1.5
√T

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

Water-hydrochloric acid
Water-ethyl alcohol
Acetone-carbon disulphide
None of the listed here

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Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

10
1
9
8

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Mass Transfer
As per Gilliland's equation, the diffusivity is

All of these
Inversely proportional to 'P'
Dependent on the molecular volume & molecular weight of components
Directly proportional to 'T1.5'

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