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Mass Transfer

Mass Transfer
NSc/NPr is called the

Lewis number
Psychrometric ratio
Stantan number
Sherwood number

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Mass Transfer
Which of the following operations does not involve leaching?

Dissolving pharmaceutical products from bark or roots
Dissolving sugar from the cells of the beet
Removing nicotine from its water solution by kerosene
Dissolving gold from ores

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Mass Transfer
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Liquid extraction
Evaporation
Absorption
Distillation

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Mass Transfer
The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model.

Both plug & perfectly mixed
Plug
None of the listed here
Perfectly mixed

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Mass Transfer
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

Both A & B
Range is 15°F
Approach is 10°F
Neither A nor B

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Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Volumetric diffusivity
Kinematic viscosity
Mass transfer co-efficient
Thermal diffusivity

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