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What follows is a plain HTML version of the Quiz.
All of the questions and answers in this quiz are found in Tom Henry's book, "Electric Motors Workbook".
1. AC generators are also called , since they produce an alternating current.
- [ ] motors
- [ ] commutators
- [ ] alternators
- [ ] rectifiers
2. With reference to armature windings, wave windings are often called windings.
- [ ] series
- [ ] multiple or parallel
- [ ] cascade
- [ ] ring
3. When armature current in a DC motor is increased, its armature reaction will
.
- [ ] increase exponetially
- [ ] decrease
- [ ] decrease exponetially
- [ ] also increase
4. DC motors draw large current during starting because .
- [ ] it has to break the momentum
- [ ] there's still a low cemf
- [ ] the armature resistance is still low
- [ ] the field produced is still weak
5. Pigtails are used on carbon brushes to
.
- [ ] hold the brush in the holder
- [ ] compensate for wear
- [ ] make a good electrical connection
- [ ] supply the proper pressure
6. One identifying feature of a squirrel-cage induction motor is that it has no
.
- [ ] air gap
- [ ] commutator or slip rings
- [ ] windings on the stationary part
- [ ] iron core in the rotating part
7. What type of motor is best suited for heavy-load applications?
- [ ] polyphase motors
- [ ] single phase motors
- [ ] DC compound motor
- [ ] DC series motor
8. A single-phase AC motor has no .
- [ ] stator
- [ ] rotating magnetic field
- [ ] armature
- [ ] cage rotor
9. If a circuit has a load of 14 amps at 220 volts, what is the va if the power factor is .95?
- [ ] 2926
- [ ] 3242
- [ ] 3080
- [ ] 3630
10. The most common type of motor that can be used with both AC and DC sources is the motor.
- [ ] series
- [ ] compound
- [ ] shunt
- [ ] repulsion
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