Important Industrial Drive Multiple Choice Questions and Answers


21.  For derries and winches which of the following drives can be used ?


   A. Pole changing squirrel cage motors

   B. DC motors with word Leonard control

   C. AC slip rings motors with a variable resistance

   D. Any of the above


✔ View Answer


D. Any of the above

✍ Your Comments

Your name:

Your Email:

Your Comments:



22.  In........ method of starting three phase induction motors the starting voltage is not reduced


   A. Auto transformer

   B. Star Delta

   C. Slip ring

   D. Any of the above


✔ View Answer


C. Slip ring

✍ Your Comments

Your name:

Your Email:

Your Comments:



23.  For which off the following applications DC motors are still preferred?


   A. High operation

   B. Variable speed drive

   C. High starting torque

   D. Reversibility


✔ View Answer


B. Variable speed drive

✍ Your Comments

Your name:

Your Email:

Your Comments:



24.  Rotor of the motor is usually supported on........... bearings


   A. Ball or roller

   B. Needle

   C. Thrust

   D. Bush


✔ View Answer


A. Ball or roller

✍ Your Comments

Your name:

Your Email:

Your Comments:



25. .............method of starting a three phase induction motor needs six terminals


   A. Resistance starting

   B. Auto transformer

   C. None of the above

   D. Star delta


✔ View Answer


A. Star delta

✍ Your Comments

Your name:

Your Email:

Your Comments:






< 1 2 3 4 5 6 7 8 9 10 Next






Enter Your Suggestion/Comments Here










Can't read the image? Click here to refresh