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Mass Transfer

Mass Transfer
The dew point of a saturated gas phase equals the __________ temperature.

Wet bulb
Gas
Room
None of these

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

Low pressure drop on pumping
All of these
Improved flooding characteristics
Rapid absorption rates and good heat transfer characteristics

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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 )

T1.5
T
√T
T3

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Mass Transfer
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

Humidity of inlet air
Relative humidity of outlet air
Flow rate of inlet air
Temperature of the solid

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Mass Transfer
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

Increase both 'G' and 'S'
Increase 'S' and decrease 'G'
Increase 'G' and decrease 'S'
Decrease both 'G' and 'S'

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Mass Transfer
With increase in temperature, the rate of leaching increases, because the

Viscosity of solvent decreases
None of these
Diffusivity of solute increases
Thermal conductivity of solute increases

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