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Mass Transfer

Mass Transfer
Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

Tunnel
Vacuum
Tray
Rotary

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Mass Transfer
The rate of mass transfer is not dependent upon the

Interfacial surface exposed between the phases
Degree of dispersion of one fluid in the other
Both A & B
None of these

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

Acetone-carbon disulphide
None of the listed here
Water-ethyl alcohol
Water-hydrochloric acid

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Mass Transfer
Prandtl number for water at 20°C is about

0.7
7
150
70

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Mass Transfer
Danckwerts developed the __________ theory.

None of these
Surface renewal
Penetration
Film

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T³
T²
T

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