• 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 wound rotor type IM is used for____________ speed operation.

  constant.
  variable.
  maximum.
  minimum.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In dc machines, 1. reactance voltage is proportional to armature current 2.reactance voltage is proportional to core length 3.reactance voltage is due to self-flux of the coil undergoing commutation 4. armature-cross flux is neutralized by interpolar flux 5. interpolarmmf is more than armature mmf in the interpolar zone From these, the correct answer is

 1, 2, 5
 2, 3, 4
 1, 3, 5
 1, 2, 3, 4

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What are the starters used for starting of cage motors?

 Star-delta starter.
 DOL starter.
 Auto transformer starter.
  All of these.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Series booster is a

 separately excited DC generator.
 shunt wound DC generator.
 permanent magnet DC generator.
  series wound DC generator.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes

 1/2 of the initial value
 twice the initial value
 4 time the initial value
 1/4 of the intial value

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The demagnetising component of armature reaction in a DC generator

  increases armature speed.
  reduces inter poles flux density.
  results in sparking trouble.
  reduces generator emf.

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
↑