Sentences.

A

1This type regulator is for

2 When magnetic fields of alternating polarity passacross the armature windings,

3 Control of the voltage induced into the ac generator windings depends

4 The number of turns per winding and the number of windings are

5 The frequency of the output voltage depends

6 The strength of the magnetic field controls

7 In some cases, as in tachometer generators, a permanent magnet field maintains

8 In today’s aircraft, electrical and electronic equipment operate

9 Systems exposed to extreme overvoltages or off-frequencies not only destroy themselves,

10 Ac generator control systems must contain circuits

11 Some brushless generators use

12 On the brushless generator, the rotating three-phase rectifiers change

B

a the ac output of the exciter to dc.

b permanent magnets in the exciter circuits.

c to protect against undervoltage and overvoltage, underfrequency and overfrequency, and

improper phase sequence.

d but may start a fire during an emergency.

e at exact frequencies and voltages.

f the load at a constant value.

g the level of output voltage.

h on the speed of the generator.

i set during generator manufacture.

j on three things.

k ac voltage induction occurs.

l use with both acand direct current (dc) power sources.