MM0704, Lesson 3
REVIEW EXERCISES
Circle the letter of the correct answer to each question.
1.
What produces a DC output from a generator?
a.
Field winding.
b.
Commutator.
c.
d.
Armature winding.
2.
Why are electromagnets, rather than permanent magnets, normally used in large generators?
a.
To provide a stronger magnetic field.
b.
To provide a stronger electrostatic field.
c.
For more economy.
d.
For more durability
3.
Which generator provides its own field current?
a.
Separately excited AC generator.
b.
Separately excited DC generator.
c.
Self-excited DC generator.
d.
Self-excited AC generator
4.
In which generator does the total current pass through the field windings?
a.
Cumulative-compound.
b.
Differential-compound.
c.
Shunt.
d.
Series.
5.
What is the purpose of the large number of turns that are required on the shunt generator field winding?
a.
To increase the armature speed.
b.
To reduce current drained from the load to a minimum.
c.
To decrease the armature speed.
d.
To increase current drained from the load to a maximum.
73
Previous Page
