Synchronous Motor MCQ [Questions with Answers]

A 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. 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

Leave a Reply

Your email address will not be published. Required fields are marked *