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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 1
16.
Drying operation under vacuum is carried out to
dry those materials which have very high unbound mositure content.
reduce drying temperature.
increase drying temperature.
dry materials having high bound moisture content.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a
higher dew point.
higher absolute (specific) humidity.
higher relative humidity
higher wet bulb temperature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Separation of two or more components of a liquid solution can not be achieved by
fractional crystallisation
liquid extraction
absorption
evaporation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Stefan's law describes the mass transfer by
diffusion
bulk flow
both 'a' & 'b'
neither 'a' nor 'b'
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
At minimum reflux ratio for a given separation
number of plates is zero.
number of plates is infinity.
minimum number of the theoretical plates is required.
separation is most efficient.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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