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Mass Transfer

Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.33
Re0.83
Re
Re0.53

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Mass Transfer
Separation of __________ employs gaseous diffusion process.

Isotopes of uranium
SO₂ and air
N₂ and O₂ from air
Isotopes of helium

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

None of these
Induced
Natural
Forced

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Decreases
Depends on the pressure of the system
Increases
Remains unchanged

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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

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

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Mass Transfer
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

P vs . log T
Log P vs . T
T vs . P
Log P vs. log T

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