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Mass Transfer

Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

√T
T
T²
T⁴

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Mass Transfer
__________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.

Dew point
Wet bulb
None of these
Dry bulb

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Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

30-40
44119
70-80
90-100

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Mass Transfer
Radioactive nuclear waste is treated in

Bollman extractor
Mixer-settler extractor
Pulsed column extractor
Rotating-disc contactor

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Twice
Half
More than
Equal to

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Mass Transfer
Which of the following equipments is not used for gas dispersion?

Perforated sieve tray towers
Spray towers
Bubble cap tray towers
Agitated vessels

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