• 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 no load current in a transformer lags the applied voltage by

  about 75°.
 about 115°.
 90°.
 0°.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The magnetic field which initially induces emf in the armature in a self excited DC generator is because of

None of these
  permanent magnets.
 armature reaction.
  residual magnetism.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is

  600 rpm.
 3000 rpm.
 500 rpm.
 3600 rpm.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
φA DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the speed when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%.

 940 RPM
 960 RPM
 920 RPM
 970 RPM

ANSWER DOWNLOAD EXAMIANS APP

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

 open type winding
 wave winding
 closed winding
 lap winding

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The armature resistance of the dc motor is generally of the range

 50 ohm.
  0.5 ohm.
 100 ohm.
  0.1 ohm.

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
↑