Synchronous Motor MCQs Part 5

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Electrical Engineering MCQs on Synchronous Motors

The three phase synchronous motor has

The three phase synchronous motor has:

  1. One slip-ring
  2. Two slip-rings
  3. Three slip-rings
  4. Four slip-rings

Correct answer: 2. Two slip-rings

A synchronous motor can be employed as synchronous capacitor for the condition when it is

A synchronous motor can be employed as synchronous capacitor for the condition when it is:

  1. Under-excited
  2. Over-excited
  3. Under-loaded
  4. Over-loaded

Correct answer: 2. Over-excited

Damper windings in synchronous motor are provided on

Damper windings in synchronous motor are provided on:

  1. Pole faces
  2. Rotor shaft
  3. Stator frame
  4. None of these

Correct answer: 1. Pole faces

Percentage slip in case of synchronous motors is

Percentage slip in case of synchronous motors is:

  1. Zero
  2. 0.5%
  3. 1%
  4. 99.98%

Correct answer: 1. Zero

Back EMF of synchronous motor depends on

Back EMF of synchronous motor depends on:

  1. Load
  2. Speed
  3. Load angle
  4. None of these

Correct answer: 3. Load angle

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