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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 2
21.
In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of
area between operating line and 45° diagonal x-y diagram.
condenser and reboiler surfaces.
tower cross-section.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Wetted wall tower experiment determines the
molal diffusivity.
volumetric co-efficient.
mass transfer co-efficient.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
In McCabe-Thiele method, at infinite reflux ratio
the overhead product is minimum.
both the operating lines coincide with diagonal.
both (a) and (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency
increases
decreases
remains same
may increase or decrease ; depends on individual design
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the
packing may be crushed due to thermal expansion/contraction of the components of the equipments.
pressure drop in the equipment will be . very high.
viscosity variation of the fluids may cause channeling/flooding.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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