Distillation Design Questions and Answers – Recovery from Failure and Analyze Results

This set of Distillation Design Multiple Choice Questions & Answers focuses on “Recovery from Failure and Analyze Results”.

1. The difference between the value which has been computed and the correct value is?
a) Error
b) Shift
c) Dynamic
d) Static
View Answer

Answer: a
Explanation: It is always an error, the deflection in original value from the calculate value is defined as error also can be calculated as percent of error.

2. Inside out method apply, Stripping factor to
a) Adjust Feed
b) Adjust Final Values
c) Adjust flow rates
d) Adjust Reflux
View Answer

Answer: c
Explanation: Inside out method apply Stripping factor to Adjust flow rates, while NR method applies to adjust the reflux.

3. Negative flow may be removed by increasing?
a) Feed
b) Reflux
c) Trays
d) Stages
View Answer

Answer: b
Explanation: Negative flow may be removed by increasing Reflux, as the flow increase it causes the danger of flooding and thus increasing reflux is the only option.
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4. A reversed temperature profile, means problem with
a) Column temperature
b) Stage temperature
c) Feed temperature
d) Plate temperature
View Answer

Answer: c
Explanation: A reversed temperature profile means problem with feed temperature in vapor phase because vapor are intended to rise up and dissolve within liquid thus affecting liquid temperature.

5. Accuracy depends upon the?
a) H value
b) S value
c) T value
d) K value
View Answer

Answer: d
Explanation: In rigorous calculation accuracy depends upon the K value, the ratio of the K values is the deciding factor of accuracy of i and j components.
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6. Aij is the?
a) Absorption factor
b) Mass transfer area
c) Activity of i and j
d) Stripping Factor
View Answer

Answer: a
Explanation: Aij is the Absorption factor for component i and stage j, while “a” denotes the mass transfer area and V/L is the stripping factor.

7. C is the?
a) Heat capacity
b) Coefficient
c) Total component
d) Final component
View Answer

Answer: c
Explanation: C is the Total component or last components also Cp is called heat capacity measure in (KJ/Kg.K) Cp water is 4.328.
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8. For the below graph the Pinch point is at?
Graph Pinch point is at 5th stage where operating line & the equilibrium curve meets
a) 5th stage
b) 9th stage
c) 10th stage
d) 2nd stage
View Answer

Answer: a
Explanation: As seen in the graph Pinch point is at 5th stage, where the operating line and the equilibrium curve meets is called the pinch point.

9. Bubble point is at?
A represents bubble point at P-T Curve starting as then temperature increases
a) A
b) B
c) C
d) Wrong interpretation
View Answer

Answer: a
Explanation: A represents the bubble point at P-T Curve starting, as then temperature increases and approaches the dew point.
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10. In the same diagram, Critical point is at?
a) A
b) B
c) C
d) Wrong interpretation
View Answer

Answer: c
Explanation: C represents the bubble point at P-T curve where it is the Extreme point, the highest value reached and then the curve decreases to lowest temperature.

Sanfoundry Global Education & Learning Series – Distillation Design.
To practice all areas of Distillation Design, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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