Synchronous Motor MCQ Part 1

Synchronous motor MCQ part 1. Electrical Engineering Multiple choice questions on Synchronous motors for interviews, job exams, and concept development.

Synchronous motors generally have

Synchronous motors generally have:

  1. Non-salient pole rotor
  2. Salient pole rotor
  3. Smooth cylindrical rotor

Correct answer: 2. Salient pole rotor

Which of the following is correct statement about the magnitude of field flux in 3 phase synchronous motor

Which of the following is correct statement about the magnitude of field flux in 3 phase synchronous motor:

  1. It varies with load
  2. It varies with power factor
  3. It varies with speed
  4. It remains constant at all loads

Correct answer: 4. It remains constant at all loads

The starting torque of a 3 phase synchronous motor is

The starting torque of a 3 phase synchronous motor is:

  1. Zero
  2. Low
  3. High
  4. Very high

Correct answer: 1. Zero

During short circuit test on motor which of the following terminals are short circuited

During short circuit test on motor which of the following terminals are short circuited:

  1. Armature terminals
  2. Field terminals
  3. One phase of stator winding
  4. Two phases of stator winding

Correct answer: 1. Armature terminals

In 3 phase induction motor the dc supply for excitation purposes is required

In 3 phase induction motor the dc supply for excitation purposes is required:

  1. For starting purposes only
  2. Continuously
  3. After starting
  4. None of these

Correct answer: 2. Continuously

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