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Mass Transfer

Mass Transfer
In case of gases, the binary diffusivity is proportional to (where, P = pressure)

√P
P
1/P
1/√P

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Mass Transfer
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if

NPr = NLe
NSc = NPr = NLe
NSc = 1
NSc = NLe

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Mass Transfer
The cooling effect in a cooling tower can be speeded up by

Reducing the humidity of the air
All of the listed here
Reducing the barometric pressure
Increasing the air velocity and area of exposed wet surface

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Mass Transfer
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.

Percentage
None of these
Relative
Molal

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Mass Transfer
Ordinary diffusion process is also called __________ diffusion.

Thermal
Pressure
Forced
Concentration

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Mass Transfer
Deairation (removal of O₂) of water is done by

Rectification
Adsorption
Absorption
Ion-exchange

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MORE MCQ ON Mass Transfer

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