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Mass Transfer

Mass Transfer
Paper industry employs __________ driers.

Rotary
Spray
Fluidised bed
Cylinder

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Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

1.56
0.56
2
1

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Mass Transfer
Which is the controlling factor for a drum drier?

Diffusion
Heat transfer
Neither A nor B
Both A & B

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Mass Transfer
Degree of freedom for leaching and solvent extraction process is

3
2
1

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

None of these
Dehumidified
Humidified at constant wet bulb temperature
Humidified with wet bulb temperature decreasing

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Mass Transfer
When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

None of these
Forced
Natural
Induced

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