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Mass Transfer

Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

F = 1
F > 1
F < 1
0 < f < 1

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

Evaporation
Absorption
Distillation
Liquid extraction

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Mass Transfer
Which of the following increases during evaporative cooling process with recirculated water supply?

Wet bulb temperature
Relative humidity
Both B and C
Partial pressure of vapour

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Mass Transfer
Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.

None of the listed here
Surface renewal
Film
Penetration

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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

Kinematic viscosity
Volumetric diffusivity
Mass transfer co-efficient
Thermal diffusivity

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Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

1
3.97
0.24
600

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