Synchronous Motor MCQ [Questions with Answers]

The synchronous motor is a constant speed motor whose speed essentially remains constant from no load to full load condition.

Synchronous Motor MCQ

Load angle value of synchronous motor mainly depends on:

1. Load
2. Excitation
3. Speed
4. Voltage

Correct answer: 1. Load

---

The variation of dc exicitation causes variation in:

1. Armature Current
2. Speed
3. Both of these
4. None of these

Correct answer: 3. Both of these

---

A synchronous motor running at no load with P.F = 1. If the field current is increased, the power factor will become:

1. Leading
2. Lagging
3. Remain same
4. Zero

Correct answer: 1. Leading

---

Synchronous motors can operate at:

1. Leading PF
2. Lagging PF
3. Unity PF
4. All of these

Correct answer: 4. All of these

---

An under excited synchronous motor has PF:

1. Leading
2. Lagging
3. Unity
4. Zero

Correct answer: 2. Lagging

---

The synchronous capacitor is a/an:

1. Underexcited synchronous motor
2. Overexcited synchronous motor
3. Combination of two series capacitors
4. None of these

Correct answer: 2. Overexcited synchronous motor

---

The correct statement about speed of synchronous motor from no load to full load:

1. It increases
2. It decreases
3. It has no effect
4. It becomes zero at full load

Correct answer: 3. It has no effect

---

The method which can be used for starting synchronous motor:

1. Using external prime mover
2. Reducing the frequency
3. Using damper windings
4. All of these

Correct answer: 4. All of these

---

Torque produced by amortisseur windings:

1. Speeds up slow machines
2. Slows down fast machines
3. Both of these
4. None of these

Correct answer: 3. Both of these

---

With increases in excitation the stability of motor:

1. Increases
2. Decreases
3. Remains same
4. Any of above

Correct answer: 1. Increases

More MCQ on Synchronous Motor:

1. Synchronous Motor MCQ Part 1
2. Synchronous Motor MCQ Part 2
3. Synchronous Motor MCQ Part 3
4. Synchronous Motor MCQ Part 4
5. Synchronous Motor MCQ Part 5
6. Synchronous Motor MCQ Part 6
7. Synchronous Motor MCQ Part 7
8. Synchronous Motor MCQ Part 8
9. Synchronous Motor MCQ Part 9
10. Synchronous Motor MCQ Part 10

1. Which of the following term is not associated with Synchronous Motor
2. The Speed of 60 Hz, 4 Pole Synchronous Motor is
3. An over excited synchronous motor takes
4. At no load the armature current of synchronous motor
5. The Higher the Applied Voltage in Synchronous Motor