• 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 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is

 25 Hz
 50 Hz
 40 HZ
 60 Hz

ANSWER DOWNLOAD EXAMIANS APP

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

 750 rpm
 1000 rpm
 1500 rpm
 3000 rpm

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Stray losses in transformer occurs in

 steel core.
  winding conductors and steel structures of transformer.
 transformer insulating oil.
 paper insulation in transformers.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An induction motor when started on no load does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be

 locking.
 crawling.
 cogging.
 plugging.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Demagnetization effects which of the following?

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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is

  25 Hz.
  60 Hz.
  16.67 Hz.
  50 Hz.

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
↑