• HOME
  • QUIZ
  • CONTACT US
EXAMIANS
  • COMPUTER
  • CURRENT AFFAIRS
  • ENGINEERING
    • Chemical Engineering
    • Civil Engineering
    • Computer Engineering
    • Electrical Engineering
    • Mechanical Engineering
  • ENGLISH GRAMMAR
  • GK
  • GUJARATI MCQ

Electrical Machines

Electrical Machines
A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms.

 0.649.
  0.573.
 0.512.
 0.443.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of

 100W
 500W
 1000W
 3000W

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Unbalance 3 - Φ stator currents cause

  heating of rotor.
  vibrations.
All of these
  double frequency currents in the rotor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following induction motor has the highest starting torque?

 Slip ring induction motor.
None of these
 Same in both induction motors.
 Squirrel cage induction motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The direction of rotation of a DC motor can be determent by

 Lenzs law.
  Flemings left hand rule.
 Amperes law.
 Flemings right hand rule.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following windings are necessary in case of all dc machines?

 lap winding
 open type winding
 closed winding
 wave winding

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines

DOWNLOAD APP

  • APPLE
    from app store
  • ANDROID
    from play store

SEARCH

LOGIN HERE


  • GOOGLE

FIND US

  • 1.70K
    FOLLOW US
  • EXAMIANSSTUDY FOR YOUR DREAMS.
  • SUPPORT :SUPPORT EMAIL ACCOUNT : examians@yahoo.com

OTHER WEBSITES

  • GUJARATI MCQ
  • ACCOUNTIANS

QUICK LINKS

  • HOME
  • QUIZ
  • PRIVACY POLICY
  • DISCLAIMER
  • TERMS & CONDITIONS
  • CONTACT US
↑