• 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 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss?

 40W
 60W
 80W
 100W

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In case of DC shunt motor if load is reduced

  The speed will remains almost constant.
 The speed will increase in proportion to reduction in load.
 DC Shunt Motor
 The speed will increase abruptly.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In 3 - Φ induction motor some times copper bars are placed deep in the rotor to

  improve starting torque.
  improve power factor.
  improve efficiency.
  reduce copper loss.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The direction of rotation of a DC compound motor can be reversed by interchanging

 armature connections.
 series field connections.
 shunt field connections.
 armature or field connections.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field

 in reverse.
 to earth.
 to an AC source.
  to a DC source.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
DC machine windings are

 short pitched
None of these
 either of these
 full pitched

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
↑