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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

Alkalis
SO₂
Oxidising atmosphere
H₂SO₄

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

Partial pressure of vapour
None of these
Wet bulb temperature
Relative humidity

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Mass Transfer
Dry bulb temperature of unsaturated air is more than its __________ temperature.

Dew point
Wet bulb
Both A & B
Neither A nor B

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Mass Transfer
The percentage humidity is less than the relative humidity only at __________ percent humidity.

Both zero and hundred
Zero
None of these
Hundred

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Mass Transfer
During constant rate drying period, vaporisation rate per unit drying surface area

Decreases with time
Increases with time
Does not change with time
Does not affect the moisture content of the wet solid

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Mass Transfer
Molecular seives are regenerated by heating to __________ °C.

< 150
> 1000
> 500
200-330

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