Mass Transfer
The critical moisture content in case of drying indicates the __________ rate period.

Beginning of falling
End of falling
Beginning of constant
None of these

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Mass Transfer
The McCabe Δ L law states that the

Molar heats of vaporisation of components are nearly equal
Linear crystal growth rate does not depend on the crystal size
Linear crystal growth rate depends on the degree of supersaturation
Linear crystal growth rate depends on the crystal size

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Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Total cost first decreases and then increases
Number of plates decreases very slowly first and then more and more rapidly
Slope of the operating line in stripping section decreases
Liquid flow increases while the vapor flow decreases for a system

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