• 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
The speed of rotating magnetic field of 8 pole 50 Hz induction motor is

 750 rpm
 3000 rpm
 1000 rpm
 1500 rpm

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Poles of DC machine are often laminated to

 reduce armature reaction.
 reduce pulsation loss.
 dissipate more heat.
 reduce iron weight.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Demagnetization effects which of the following?

 reduces the terminal voltage
 reduction in main field flux
 commutation
 both B and C

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Dynamic braking can be used for

All of these
 compound motors.
 shunt motors.
 series motors.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If starter is not used with large DC motor for starting, it will

 damage the armature and commutator.
 provide execessive voltage drop in line.
 draw a starting current many times its rated full load current.
 all of above.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC generator, the ripples in the direct emf generated are reduced by employing

  equalizer rings.
  carbon brushes.
 graphite brushes.
  commutator with large number of segments.

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
↑