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Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
6. Which of the following is an electrical component that opens a circuit and
stops the flow of electricity when the current reaches unsafe levels?
A. Fuses
B. Transformer
C. Circuit breaker
D. Motor control center
7. Which of the following are enclosures that house the equipment for motor
control?
A. Fuses
B. Transformer
C. Circuit breaker
D. Motor control centers
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
8. Which of the following is an electrical device used to start, stop, or otherwise
reconfigure the flow of electricity in a circuit?
A. Fuses
B. Switch
C. Transformer
D. Circuit breaker
9. What type of couplings are used in applications where only small amounts of
misalignment can be tolerated without damage to equipment or decreased
performance?
A. Rigid
B. Fluid
C. Flexible
D. Rotating
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 22
10. What type of belts are used when the equipment has higher horsepower or
loading conditions?
A. V-belts
B. Standard
C. Light-duty
D. High-capacity
11. What is a mechanical device used to transfer rotational energy between two or
more sprockets?
A. Belts
B. Couplings
C. Chain
D. Sprocket
12. What is a toothed wheel used in chain drives?
A. Belts
B. Couplings
C. Chain
D. Sprocket
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
13. Which of the following is an advantage of a chain?
A. Limited applications with lower speeds
B. Noise is usually higher
C. Chains may elongate
D. Capable of operating in hostile environments
14. What type of bearings would you use in large equipment and at high speeds?
A. Ball
B. Roller
C. Sleeve
D. Thrust
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 24
15. What type of bearings would you use to prevent axial movement of the shaft?
A. Ball
B. Roller
C. Sleeve
D. Thrust
16. What gear would you use to transmit power smoothly through a low power
range?
A. Spur
B. Worm
C. Bevel
D. Helical
17. What gear would you use in applications that require greater power (torque)
and equipment size?
A. Spur
B. Worm
C. Bevel
D. Helical
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
18. What type of lubricant returns the oil to a reservoir where filtration and cooling
occur before redistribution back through the system?
A. Drip feed
B. Oil mist
C. Recycling
D. Splash feed
19. What type of lubricant is similar to a drip feed oiler?
A. Forced feed
B. Splash feed
C. Wick feed
D. Gravity feed
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 26
20. What type of lubricant uses a moving member?
A. Forced feed
B. Splash feed
C. Wick feed
D. Gravity feed
21. What are set to lubricate and cool rotating components?
A. Clean liquid purges
B. Interlock protection
C. Vibration monitoring
D. Start-up and shutdown procedures
22. What are often used to detect vibrations that are outside the normal range?
A. Clean liquid purges
B. Interlock protection
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
C. Vibration monitoring
D. Start-up and shutdown procedures
23. Noisy ________ may also be an indication of potential problems.
A. Drivers
B. Gearboxes
C. Machinery trains
D. Bearings
24. Which of the following is a task that process technicians may have to
complete during the maintenance of power transmissions?
A. Record vibration levels
B. Switch oil coolers
C. Change oil
D. All of the above
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 28
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. How often does the AC power supply change direction in the United States?
A. 10 times per second
B. 30 times per second
C. 60 times per second
D. 90 times per second
2. What is the most common way to manufacture electricity?
A. Wind
B. Thermal
C. Burning fuels
D. Hydroelectric
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 29
3. What type of couplings are used in applications where variable speed
operations occur?
A. Rigid
B. Fluid
C. Flexible
D. Rotating
4. What is the most commonly used gear in the process industries?
A. Spur
B. Worm
C. Bevel
D. Helical
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 30
5. What indicates contamination in the oil?
A. Water
B. Strong odor
C. Milky appearance
D. Clear appearance
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 31
APPENDIX, Chapter 10
Table of Contents
Contents
Page
Checking Your Knowledge Answer Key
32
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 32
Checking Your Knowledge Answer Key
1. Define the following terms:
a. Alternating current (AC)
b. Direct current (DC)
c. Ammeter
d. Circuit breaker
e. Fuse
f. Motor control center (MCC)
g. Switch
h. Ampere
i. Ohm
j. Volt
k. Watt
Answers:
2. A rigid coupling is used:
a. to allow the motor to accelerate to full speed before the load is increased.
b. in applications where small amounts of misalignment can be tolerated.
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 33
c. to cushion the shock from equipment overloads.
d. more frequently in general power transmission service and permits some
misalignment.
3. (True or False) One advantage of a chain over a belt driver that there is no
slippage between chain and sprocket teeth.
4. Which of the following definitions best describes sleeve (fluid film) bearings?
a. They are used in moderate-pressure applications in small to mid-size operations (less
than 1,000 rpm).
b. They are used in smaller machinery at low speeds.
c. They are used in larger machinery at low speeds.
d. They are used in larger machinery at high speeds.
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 34
5. _________________ gears are used to obtain large speed reductions between
nonintersecting shafts placed at 90-degree angles to one another.
a. Spur
b. Worm
c. Helical
d. Bevel
6. _______________________ facilitates the spreading of lubricant film into
narrow spaces between equipment components.
a. Lubrication
b. Capillary action
c. Corrosion inhibitors
d. Antifoams
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
7. Which of the following are the most important additives used in lubricants?
(Select all that apply.)
a. Corrosion inhibitors
b. Antifoams
c. Emulsifiers
d. Antioxidants
8. Which type of lubricator is used in larger machinery and uses an oil pump to
inject lubricant through ducts drilled into rotating members and casings?
a. Ring oilers
b. Wick feed
c. Forced feed
d. Drip feed
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 36
9. (True or False) Interlock systems are designed to prevent rotating equipment
from sustaining serious damage when upset conditions or component failures
occur.
10. (True or False) Equipment vibration on large rotating equipment can be an
indication of a potentially serious problem.
11. _______________ is the process of connecting an object to the earth using
copper wire and a rod to provide a path for the electricity to dissipate
harmlessly into the ground.
12. (True/False) For motors, fast-acting fuses must be used because there is a
large current in-rush when a motor starts.
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
13. What type of bearings are used to prevent axial movement of the shaft?
a. Roller
b. Ball
c. Sleeve
d. Thrust
14. The ____________ is designed to be the “weak link” between the driver,
gearbox, or machinery train to prevent serious damage in the event of a
malfunction.
15. List four tasks that process technicians may be required to complete in
association with the maintenance of power transmissions and lubricating
equipment.
Process Technology Equipment
Chapter 10 Power Transmission and Lubrication
Page 38
16. (True/False) Shift supervisors are responsible for maintaining oil levels,
changing system filters, and adding grease to bearings.
