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Mass Transfer

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

Half
Twice
Equal to
More than

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Mass Transfer
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

Humid heat
Latent heat
Specific heat
Sensible heat

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

3 to 4
2.5 to 3
1.2 to 1.5
5

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Mass Transfer
Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.

Tray
None of these
Rotary
Freeze

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Mass Transfer
'ADDUCTS' and 'CLATHRATES' are used in case of

Crystallisation
Absorption
Extractive distillation
None of these

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Mass Transfer
Which of the following increases during evaporative cooling process with recirculated water supply?

Both B and C
Relative humidity
Wet bulb temperature
Partial pressure of vapour

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