Chemical Process Calculation Questions and Answers – Recycle

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Recycle”.

1. Material that leaves a process unit that is the downstream and is returned to the same unit is called
a) Recycle
b) Purge
c) Bypass
d) None of the mentioned
View Answer

Answer: a
Explanation: Material that leaves a process unit that is the downstream and is returned to the same unit is called Recycle.

2. The stream containing the recycled material is known as
a) Recycle stream
b) Purge stream
c) Bypass stream
d) None of the mentioned
View Answer

Answer: a
Explanation: The stream containing the recycled material is known as Recycle stream.

3. A recycle system include _________ recycle stream.
a) One or more than
b) Only one
c) Only two
d) None of the mentioned
View Answer

Answer: a
Explanation: A recycle system include one or more than recycle stream.
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4. The feed stream that enters a reactor, usually used in a process with a reactor and recycle, is
a) Process feed
b) Overall process
c) Overall product
d) None of the mentioned
View Answer

Answer: a
Explanation: The feed stream that enters a reactor, usually used in a process with a reactor and recycle, is process feed.

5. The objective of material balance is to assess the
a) Input-output
b) Conversion efficiency
c) Losses
d) All of the mentioned
View Answer

Answer: d
Explanation: The objective behind the material balance fulfils all the a, b, c purpose.
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6. Recycle product is
a) Input to process
b) Output to process
c) Both output and input
d) All of the mentioned
View Answer

Answer: a
Explanation: Recycle product is input to process.

7-10. For the given process
The total balance for first part of the process for the recycle process is F + R = W + G

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7. The correct statement is
a) F + W = G + R
b) F + W = G -R
c) F + R = W + G
d) All of the mentioned
View Answer

Answer: c
Explanation: For the recycle process, use total balance for first part of the process.

8. The correct statement is
a) G = P + R
b) G = P – R
c) GP = R
d) All of the mentioned
View Answer

Answer: a
Explanation: For the recycle process, use total balance for second part of the process.
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9. The correct statement is
a) F = W – P
b) G = P – R + W
c) F = W + P
d) F = W – P
View Answer

Answer: d
Explanation: For the recycle process, use total balance for whole process.

10. In the block diagram, the recycle stream is shown by
a) F
b) G
c) R
d) W
View Answer

Answer: c
Explanation: Material that leaves a process unit that is the downstream and is returned to the same unit is called Recycle.

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, 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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