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
Answer: a
Clarification: 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
Answer: a
Clarification: 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
Answer: a
Clarification: A recycle system include one or more than recycle stream.
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
Answer: a
Clarification: 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
Answer: d
Clarification: The objective behind the material balance fulfils all the a, b, c purpose.
6. Recycle product is
a) Input to process
b) Output to process
c) Both output and input
d) All of the mentioned
Answer: a
Clarification: Recycle product is input to process.
7-10. For the given process
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
Answer: c
Clarification: 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
Answer: a
Clarification: For the recycle process, use total balance for second part of the process.
9. The correct statement is
a) F = W – P
b) G = P – R + W
c) F = W + P
d) F = W – P
Answer: d
Clarification: 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
Answer: c
Clarification: Material that leaves a process unit that is the downstream and is returned to the same unit is called Recycle.