25
Chapter 8
End of Chapter Review Questions Answer Key
1. What part of an alternator produces the magnetic field?
2. A typical rotor contains:
3. What is used in an alternator to rectify AC to DC?
4. What instrument should be used to measure alternator current output?
5. How much horsepower is required to drive a 100 amp alternator?
6. What is the function of slip rings in an alternator?
7. What is the moving component in an alternator?
8. Why do the brushes in an alternator last much longer than brushes in a DC generator?
26
9. How many windings are in a typical alternator stator?
10. What is used to control the current output of an alternator?
11. How many diodes are used in a typical alternator rectifier bridge?
12. When a diode is in reverse bias, what is happening to current flow through it?
13. What type of diode bridge arrangement is more common in alternators used in heavy
truck applications?
14. What component is used to switch field current on and off in an alternator?
15. When the term sensing voltage is referred to in alternator operation, which of the
following best describes it?
27
16. What is used to perform switching functions in an electronic voltage regulator?
17. When an alternator is full-fielded, which of the following components is bypassed?
18. When a carbon pile is used to load the electrical system to test the charging circuit,
how much load should be applied?
19. An alternator rated at 130 amps is carbon pile load tested and system voltage drops to
12.6 volts at a current load of 120 amps. Technician A says that the alternator is okay
and can be returned to service. Technician B says that alternator output should test
within 10 percent of the rated specification. Who is correct?
20. Technician A says that Intelli-check is an industry acceptable means of testing
charging system performance. Technician B says that when Intelli-check produces a
good status rating, the charging system should still be further tested. Who is correct?