Process Technology Equipment
Chapter 9 Motors and Engines
20. What class of electrical hazard classifications is used to identify gases,
vapors, and liquids that can be present in explosive or ignitable mixtures?
A. Class I
B. Class II
C. Class III
D. Class IV
21. What group designation would be used for a Class II electrical hazard?
A. A
B. B
C. D
D. F
Process Technology Equipment
Chapter 9 Motors and Engines
22. Which of the following is a role of a process technician with regard to the
operation and maintenance of motors?
A. Changing motor bearings
B. Monitoring maintenance schedules
C. Doing proper housekeeping
D. Monitoring the condition of the rotors
23. What is often the first indication of a problem in an engine?
A. Vibration
B. Leaks
C. Abnormal sounds
D. Excessive heat
Process Technology Equipment
Chapter 9 Motors and Engines
Page 36
24. Which of the following can be identified from an on-site inspection of
lubrication?
A. Odor
B. Foam
C. Emulsion state
D. All of the above
25. Which of the following is a step in a typical startup procedure for an engine?
A. Close all bleeds and vents.
B. Centralize the isolation keys.
C. Observe the exhaust for smoke.
D. All of the above
Process Technology Equipment
Chapter 9 Motors and Engines
Page 37
1. What are the most common types of engines used in process facilities?
A. Gas turbine
B. Electric motor
C. Induction motor
D. Internal combustion engine
2. Which of the following is an example of an external combustion engine?
A. Gas engine
B. Steam turbine
C. Diesel engine
D. Electric engine
Process Technology Equipment
Chapter 9 Motors and Engines
Page 38
3. What component of an internal combustion engine moves up and down or
backward and forward inside a cylinder?
A. Pistons
B. Spark plugs
C. Camshaft
D. Crankshaft
4. Which potential problem with electrical distribution and motors is caused by
frozen bearings due to high temperature?
A. High vibration
B. High temperatures
C. Motor not starting
D. Equipment failure
5. What class of electrical hazard classifications is used to identify combustible
dust that can be present in amounts that could produce potentially explosive
mixtures?
A. Class I
B. Class II
C. Class III
D. Class IV
Answers:
Process Technology Equipment
Chapter 9 Motors and Engines
Page 39
Process Technology Equipment
Chapter 9 Motors and Engines
Page 40
APPENDIX, Chapter 9
Table of Contents
Contents
Page
Checking Your Knowledge Answer
Key
41
Process Technology Equipment
Chapter 9 Motors and Engines
Page 41
Checking Your Knowledge Answer Key
1. Define the following terms:
a. Shroud
b. Shaft
c. Bearing
d. Load
e. Fan
9.4 Explain the operating principles of motors and engines.
Blooms Level: Remember
2. (True or False) AC motors are the most common type of motor used in the
process industries due to their simplicity.
3. (True or False) Variable speed motors allow for the rotation speed of the motor
to be adjusted.
4. (True or False) Synchronous motors are the most common type of AC motor.
Process Technology Equipment
Chapter 9 Motors and Engines
Page 42
5. A(n) ______ is the amount of torque necessary for a motor to overcome the
resistance of the machine it drives.
a. watt
b. amp
c. volt
d. load
6. A coupling failure is often dangerous because of ______.
a. fire
b. vibration
c. a blown fuse
d. flying shrapnel
7. Which of the following is NOT a potential hazard associated with motors?
a. Corrosion
Process Technology Equipment
Chapter 9 Motors and Engines
b. Electrocution
c. Burns
d. Injury from moving parts
8. Areas where motors are used may be classified as possibly hazardous and
include restrictions. Where can a list of restrictions be found?
a. National Electric Code information
b. Employee handbook
c. Motor control center
d. All of the above
9. What three things must process technicians do as they perform routine tasks
on electric motors?
a. Anticipate, explore, and think
b. Look, listen, and check
c. Prevent, understand, and consider
d. Question, answer, and know
Process Technology Equipment
Chapter 9 Motors and Engines
Page 44
10. In the process industries, engines may be referred to as _________.
11. What component of internal combustion engines converts the piston’s up–
and-down or forward-and-backward motion into rotational motion?
a. Head
b. Crankshaft
c. Connecting rod
d. Engine block
12. List three causes of high temperatures in motors.
Process Technology Equipment
Chapter 9 Motors and Engines
13. (True/False) Using the wrong lubricant can result in serious and costly
equipment damage and, in some cases, catastrophic failure, fire, explosion,
and injury to personnel.
14. Identify the order of the steps for the general lockout/tagout procedure:
____ Isolate and de-energize all sources of energy to the equipment.
____ Confirm isolation with maintenance and add maintenance tags.
____ Stop the equipment.
____ Tag the start/stop station.
____ Isolate the equipment (in other words, block, tag, and lock all process lines).
____ Centralize the isolation keys in an area with restricted access (for example, a
lockout/tagout lockbox).
15. List three key process variables that should be monitored during normal
operation of engines.