Process Technology Equipment Chapter 7 Compressors
23. Which of the following is a step in the typical start-up procedures for a
compressor?
A. Close all block valves.
B. De-energize all equipment.
C. Depressurize the compressor.
D. Drain any liquid from the compressor’s case.
24. Which of the following is a step in the typical lockout/tagout procedure for a
compressor?
A. Depressurize the compressor.
B. Use an inert gas to purge the compressor case of air.
C. Place ancillary lubricating and seal oil systems into operation.
D. Drain the compressor’s case or cylinders to remove any liquid.
Process Technology Equipment Chapter 7 Compressors
Clicker Questions
(Note to Instructor: If you have clicker capability in your institution, you may want to
include some of these questions as appropriate. Or perhaps you just want to use them
as a way to check the students’ understanding of the content.)
1. What is the most common type of compressor used in the process industries?
A. Rotary compressor
B. Centrifugal compressor
C. Axial compressor
D. Piston compressor
2. What is the compression ratio of a compressor with a suction pressure of 500
psiA and a discharge pressure of 1250 psiA?
A. 1.5
B. 2
C. 2.5
D. 3
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5. What can contaminate lubrication fluids?
A. Water
B. Process fluids
C. Metal particulates
D. All of the above
Process Technology Equipment Chapter 7 Compressors
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APPENDIX, Chapter 7
Table of Contents
Contents
Page
Checking Your Knowledge Answer Key
38
Process Technology Equipment Chapter 7 Compressors
Checking Your Knowledge Answer Key
1. Define the following terms:
a. Axial compressor
b. Centrifugal compressor
c. Dynamic compressor
d. Liquid ring compressor
e. Multistage compressor
f. Positive displacement compressor
g. Reciprocating compressor
h. Rotary compressor
i. Single-stage compressor
j. Cylinder
k. Interlock
l. Surging
Process Technology Equipment Chapter 7 Compressors
2. ________________ ratio determines the maximum pressure increase that can
be expected to be achieved in each stage of compression.
3. Name three reasons why centrifugal compressors are so widely used in the
process industries.
4. The type of compressor that uses sliding vanes to force gases out of a
chamber is classified as what kind of compressor? (Select all that apply.)
a. Rotary
b. Centrifugal
c. Axial
d. Dynamic
Process Technology Equipment Chapter 7 Compressors
8. Surging can cause (select all that apply):
a. seal leakage
b. vibration
c. destruction of the machinery
d. deadheading conditions
9. (True or False) Interlock systems are used to bypass emergency shutdown
systems in order to keep production running so a particular unit can meet its
production goals.
10. (True or False) Compressors move liquids, and pumps move gases.
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14. Which of the following is an equipment hazard associated with compressors?
(Select all that apply.)
a. Discharge of harmful gas into the air
b. Chemical exposure
c. Electric shock
d. Inadequate lubrication
15. List four things a process technician can do to monitor equipment and guard
against hazards.