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Mass Transfer

Mass Transfer
Large scale drying of wheat is done in a __________ dryer.

Vacuum rotary
Spouted bed
Tray
Fluidised bed

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Mass Transfer
The binary diffusivity in gases does not depend upon the

Temperature
Nature of the components
None of the listed here
Pressure

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Mass Transfer
In the constant rate period of the rate of drying curve for batch drying,

None of these
Surface evaporation of unbound moisture occurs
Cracks develop on the surface of the solid
Rate of drying decreases abruptly

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Mass Transfer
Percentage saturation is __________ the relative saturation.

Always greater than
None of these
Always smaller than
Not related to

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

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

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Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

Plate absorption column
McCabe-Thiele method
Enthalpy concentration method
Ponchan-Savarit method

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