3 phase induction motor questions and answers

In this post “3 phase induction motor questions and answers” you will read multiple phase questions and answers related to three phase motor.

3 phase induction motor questions and answers
3 phase induction motor questions and answers

Important 3 phase induction motor questions and answers

01. Which speed is called as synchronous speed in 3 phase induction motor?

  1. No load speed
  2. Full load speed
  3. Rotating magnetic field speed
  4. Relative speed between stator and rotor
Rotating magnetic field speed

02. What is the synchronous speed of a A.C 3 phase induction motor having 6 poles at a frequency of 50 Hertz?

  1. 800 rpm
  2. 1000 rpm
  3. 1200 rpm
  4. 1440 rpm
1000 rpm

03. What is the rotor frequency of a 3 phase squirrel cage induction motor at the time of starting?

  1. Equal to supply frequency
  2. 3 times less than supply frequency
  3. 3 times more than supply frequency
  4. times less than supply frequency
Equal to supply frequency

04. The Following starter will give better starting torque to below 5 HP Squirrel cage induction motor ?

  1. DOL Starter
  2. Star Delta Starter
  3. Auto Transformer Starter
  4. None of the Above
DOL Starter

05. The Function of Damper Winding in a Synchronous motor is to ?

  1. Reduce Hunting Effect
  2. Start Motor
  3. Stop The Motor
  4. Reduce Hunting Effect and Start Motor
Reduce Hunting Effect and Start Motor

Leave a Comment

Your email address will not be published.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

error: Content is protected !!