Mass Transfer Questions and Answers – Reboiler & Condenser Selection for Fractionator

This set of Mass Transfer aptitude tests focuses on “Reboiler & Condenser Selection for Fractionator “.

1. Which of the following reboiler is considering as an additional tray?
a) Jacketed kettle
b) Internal reboiler
c) Kettle-reboiler
d) None of the mentioned
View Answer

Answer: c
Explanation: Kettle boiler is the external boiler considered as an additional tray.

2. The internal reboilers are preferred for maintaining the economy of an industry.
a) True
b) False
View Answer

Answer: b
Explanation: The internal reboilers need shutting down of distillation column for cleaning.

3. The vertical-syphon reboilers are not preferred because of
a) Fouling
b) Overheat
c) Large tubes
d) None of the mentioned
View Answer

Answer: a
Explanation: Vertical-syphon has inside tubes fouls frequently.
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4. Jacketed kettle is preferred for kettle type reboiler.
a) True
b) False
View Answer

Answer: b
Explanation: Jacketed kettle needs fractionator shut down and has low heat transfer area.

5. The reboiler which is most preferred is
a) External
b) Internal
c) Middle
d) All of the mentioned
View Answer

Answer: a
Explanation: External reboiler can easily replace and no need for shutting down of fractionator.
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6. Find the condenser location.
Condenser is used to condense high volatile vapour gas to liquid so must present at top
a) X
b) Y
c) Z
d) No condenser
View Answer

Answer: a
Explanation: Condenser is used to condense the high volatile vapour gas to liquid so it must present at the top.

7. Condenser or reboiler is consider as a trays or stage in a fractionator.
a) True
b) False
View Answer

Answer: a
Explanation: Some separated units are present in condenser or reboiler so it also included in a number of trays.
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8. The fuel fired furnace is preferred for high boiling point.
a) True
b) False
View Answer

Answer: a
Explanation: The low volatile (high boiling point) components need more heat. So fuel fired furnace is preferred.

9. Will this arrangement is possible and effective.
The more volatile component & low volatile component remains similar to feed condition
a) True
b) False
View Answer

Answer: b
Explanation: NO distillate forms. NO separation occurs. Since the more volatile component and low volatile component remains similar to feed condition.
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10. Most reboilers are
a) Heat regulators
b) Heat exchangers
c) Heat analyser
d) Heat rectifiers
View Answer

Answer: b
Explanation: Stream is economical for heat production so heat exchangers are preferred. Heat exchangers are easy to handle and replace.

Sanfoundry Global Education & Learning Series – Mass Transfer.

To practice all areas of Mass Transfer for aptitude tests, 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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