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Mass Transfer

Mass Transfer
Free flowing granular materials can be best dried in a __________ drier.

Drun
Rotary
Freeze
Cylinder

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Mass Transfer
Molecular seives are regenerated by heating to __________ °C.

< 150
200-330
> 1000
> 500

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Mass Transfer
In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as

Ri = Re/(1 - Re)
Ri = Re/(1 + Re)
Ri = Re
Ri = (1 - Re)/Re

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Mass Transfer
The equipment used in the extraction of highly corrosive radio active liquids is

Spray column
Mixer settler
Baffle tower
Pulse column

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Mass Transfer
Large scale usage of flash distillation is practised in

Soap manufacturing
Polymerisation industry
Ammonia synthesis plant
Petroleum refinning

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Mass Transfer
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

0.122
0.079
0.048
0.152

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