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Mass Transfer

Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

2.5 to 3
1.2 to 1.5
5
3 to 4

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Mass Transfer
At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.

Between 0 and 100
100
50

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Mass Transfer
Dorr thickener is an equipment used for

Classification
Sedimentation
Leaching
Clarification

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Mass Transfer
At 750°K and 1 atm, the approximate value of Schmidt number for air is

1
0.1
10
0.01

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

Baffle tower
Spray column
Mixer settler
Pulse column

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Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Kinematic viscosity
Thermal diffusivity
Volumetric diffusivity
Mass transfer co-efficient

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