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Mass Transfer

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

Tray
Rotary
Vacuum
Tunnel

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Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Unknown
Known
Not required
Calculated

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Mass Transfer
At a fixed total pressure, humidity depends only on the

Density of the vapour
None of these
Partial pressure of vapour in the mixture
Heat capacity of the vapour

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Mass Transfer
With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency

Decreases
Increases
May increase or decrease ; depends on individual design
Remains same

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Mass Transfer
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

4
1
3
2

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Mass Transfer
Weight of 1 m³ of humid air as compared to 1 m³ of dry air, under the same conditions, is

Same
Unpredictable
Less
More

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