Synchronous Motor MCQs Part 3
Contents
The rotor of synchronous motor is:
- Salient pole type
- Non-salient pole type
- Similar to a DC motor’s rotor
- None of these
Correct answer: 1. Salient pole type
Synchronous motor runs at speed that is
Synchronous motor runs at speed that is:
- Higher than synchronous speed
- Lower than synchronous speed
- Same as synchronous speed
- None of these
Correct answer: 3. Same as synchronous speed
The slip rings in synchronous motor carry
The slip rings in synchronous motor carry:
- AC current
- DC current
- Both of these
- None of these
Correct answer: 1. DC current
If field of synchronous motor is under excited the power factor will be
If field of synchronous motor is under excited the power factor will be:
- Unity
- Zero
- Leading
- Lagging
Correct answer: 4. Lagging
The speed of synchronous motor
The speed of synchronous motor:
- Increases with increases in load
- Increases with decreases in load
- Always remains constant
- None of these
Correct answer: 3. Always remains constant
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