• 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 current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is

 60
 660
 40
 600

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A dc shunt motor has external resistance Ra and Rf in the armature and field circuits respectively. Armature current at starting can be reduced by keeping

 Ra maximum and Rf maximum
 Rf maximum and Ra minimum
 Ra minimum and Rf minimum
 Ra maximum and Rf minimum

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A synchorous generator connected to an infinite bus is over excited. Considering only the reactive power from the point view of the system the machine acts as

 A resistor.
 an inductor.
  None of these.
 A capacitor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Dummy coils are used for

 reducing armature reaction.
 mechanical balancing.
 increasing efficiency.
All of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Satisfactory commutation of DC machine requires

 brushes should be of proper grade and size.
All of these
 smooth, concentric commutator properly undercut.
 brushes should smoothly run in the holders.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In above question, find rms line voltage for delta connection?

 399 V.
 100 V.
 50 V.
  230.2 V.

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
↑