Chapter 9 Review Questions
Chapter 9 Review Questions
1. What is magnetism?
2. Torque is ________.
3. A magnetic field is _________.
4. True or False: A permanent magnet is a piece of material that has been magnetized and can hold its magnetic strength for a reasonable length of time.
5. How is an electromagnet produced?
6. Which of the following produces the best electromagnet?
7. Unlike poles of a magnet _________each other and like poles_________ each other.
8. What part does polarity play in the operation of an electric motor?
9. What part of a motor produces an inductive magnetic field within itself to facilitate the rotating motion?
10. What part does the frequency of alternating current play in the operation of an electric motor?
11. What would be the speed of a two pole motor operating on a 120 Volts 60 Hz power supply?
12. What are the five types of single phase motors used in the industry?
13. Which of the following correctly lists the motor’s starting torque from lowest to highest?
14. Which of the following is a common use of a shaded-pole motor?
15. How does a shaded-pole motor operate?
16. How can a shaded-pole motor be reversed?
17. What determines the rotation of a shaded-pole motor?
18. Draw a diagram of a three-speed, shaded-pole motor.
19. What enables a split-phase motor to develop enough torque to begin rotation?
20. What removes the starting winding from the electrical circuit of an open type split phase motor once it reaches 75% of its operating speed?
21. What are the three probable areas of trouble in a split-phase motor?
22. What is the unit of measurement for the strength of a capacitor?
23. What is the purpose of a capacitor?
24. What is the difference between a running and a running and a starting capacitor?
25. List the five capacitor replacement rules.
26. Explain the operation of a permanent split-capacitor motor.
27. How are a PSC motor and a capacitor start capacitor-run motor similar?
28. What are the advantages
1. What is magnetism?
2. Torque is ________.
3. A magnetic field is _________.
4. True or False: A permanent magnet is a piece of material that has been magnetized and can hold its magnetic strength for a reasonable length of time.
5. How is an electromagnet produced?
6. Which of the following produces the best electromagnet?
7. Unlike poles of a magnet _________each other and like poles_________ each other.
8. What part does polarity play in the operation of an electric motor?
9. What part of a motor produces an inductive magnetic field within itself to facilitate the rotating motion?
10. What part does the frequency of alternating current play in the operation of an electric motor?
11. What would be the speed of a two pole motor operating on a 120 Volts 60 Hz power supply?
12. What are the five types of single phase motors used in the industry?
13. Which of the following correctly lists the motor’s starting torque from lowest to highest?
14. Which of the following is a common use of a shaded-pole motor?
15. How does a shaded-pole motor operate?
16. How can a shaded-pole motor be reversed?
17. What determines the rotation of a shaded-pole motor?
18. Draw a diagram of a three-speed, shaded-pole motor.
19. What enables a split-phase motor to develop enough torque to begin rotation?
20. What removes the starting winding from the electrical circuit of an open type split phase motor once it reaches 75% of its operating speed?
21. What are the three probable areas of trouble in a split-phase motor?
22. What is the unit of measurement for the strength of a capacitor?
23. What is the purpose of a capacitor?
24. What is the difference between a running and a running and a starting capacitor?
25. List the five capacitor replacement rules.
26. Explain the operation of a permanent split-capacitor motor.
27. How are a PSC motor and a capacitor start capacitor-run motor similar?
28. What are the advantages