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Table of Contents.
¶ U.S. GOVERNMENT PRINTING OFFICE; 1945 - 618779
Chapter 14 QUIZ
1. Name the two essential circuits of a generator. Briefly describe the parts of each.
2. When is
the induced voltage of a coil zero?
3. When is the induced voltage of a rotating coil at its maximum
4. Is a.c. or d.c. produced inside a rotating coil?
5. How is d.c. obtained from a rotating coil ?
6. Adding coils to an armature does what to the. d.c. produced?
7. What connection is used between
coils of an armature to produce a high and
8. Why is a drum winding superior to a
9. Distinguish between the stator and the rotor of an alternator.
10. Why are a-c
machines designed opposite to d-c machines?
Chapter 14 ANSWERS
1. Primary-pole pieces, yoke, windings and field. Secondary-armature consisting of
and iron core.
2. When the coil is in the neutral plane.
3. When the coil sides are directly under the pole pieces.
4. Always a.c.
5. By rectifying the d.c. in a
6. More coils eliminate the peaks and valleys of current. Pulsations are reduced.
7. Series connections.
8. Less reluctance,
cheaper, easier to repair, all coil sides cut flux.
9. The stator is the
stationary part containing the armature windings. The rotor is the
rotating part containing the field
10. So that the high voltages obtained in a.c. will not be taken off on a shipping