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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 2
46.
Pick out the correct statement.
Bound moisture is removed during constant rate drying period.
Free moisture is removed during falling rate drying period.
The sum of free moisture and equilibrium moisture in a solid is called the critical moisture.
The driving force for mass transfer in a wet solid is its free moisture content.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Very tall packed towers are divided into series of beds to
reduce the overall pressure drop
avoid channelling
reduce liquid hold-up
avoid flooding
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.
unbound
free
critical
bound
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
With increase in temperature, the solubility of gases in liquids, at fixed pressure
increases
decreases
remains same
either (a) or (b), depends on the system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
In most of the vacuum crystalliser, vacuum is generally produced by means of a
suction pump
compressed air jet
steam jet ejector with a barometric condenser
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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