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Mass Transfer

Mass Transfer
In paper industry, paper is dried in a __________ dryer.

Conveyor
Heated cylinder
Festoon
Tunnel

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Mass Transfer
Fractional solvent extraction

Employs only one solvent
None of the listed here
Employs two solvents
Results in low interfacial tension

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Mass Transfer
In the desorption of highly soluble gas from the liquid, the main resistance will be in the __________ phase.

Gas
Liquid
Neither A nor B
Both A & B

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

25
< 25
-25
> 25

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Mass Transfer
For gas absorption, low viscosity solvents are preferred, because of their

Better flow characteristics
Rapid absorption rates
All of these
Low pumping pressure drop

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Mass Transfer
Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty?

Grid tray tower
Bubble cap tower
Perforated tray tower
Wetted wall tower

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