• 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
which of the following losses are negligible in blocked rotor test?

 mechanical loss
 iron loss
 both A and B
 copper loss

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A synchronous motor is supplying a load at unity power factor. If the load on the motor is increased keeping its excitation and terminal voltage constant, the power factor

 will become leading
 will remain the same
 will become lagging
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
On what factors the speed of dc motor depends?

 Armature current Ia.
 Field flux.
 Applied voltage.
 All of these.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In DC generators, the cause of rapid brush wear may be

 any of above.
 severe sparking.
 imperfect contact.
 rough commutator surface.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following represents the operating region of slip in a 1-phase induction motor?

 0 < S < 2
 -1 < S < 1
 -2 < S < 2
 0 < S < 1

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If iron loss and full load copper loss of any transformer are denoted by Pi and Pc, then the load corresponding to maximum efficiency is given by

 (Pi / Pc)1.6 × full Load.
 (Pi / Pc) × full Load.
  (Pi / Pc)0.5 × Full Load.
 (Pi / Pc)2 × full Load.

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
↑