• 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
If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is

 200 V
 115 V
 230 V
 460 V

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Open circuit in a transformer is prefered with

 high frequency supply
 rated transformer voltage
 rated transformer current
 direct current

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

 56.91 V.
 86.91 V.
  66.91 V.
 76.91 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which method is less recommendable for induction motor starting in the industries?

  Rotor resistance starting.
  Auto transformer starting.
  Direct online starting.
  Stator resistance starting.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
When a DC cummulative compound wound motor is loaded

  Torque increase and speed decrease.
 Torque and speed both increase.
 Torque decrease and speed increases.
 Both torque and speed decrease.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In case of DC Shunt Motor electromagnetic torque developed is

 Inversely proportional to the armature current.
 Proportional to the square of armature current.
 Proportional to the armature current.
 None of above.

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
↑