• 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

 230 V
 115 V
 200 V
 460 V

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is

  1500 rpm.
  4000 rpm.
  3600 rpm.
  3000 rpm.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In dc machines, the armature windings are placed on the rotor because of the necessity for

 generation of voltage
 commutation
 electromechanical energy conversion
 development of torque

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be

 zero.
 less than core loss.
  more than core loss.
 equal to core loss.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will

 reduced to half
 increase by 200%
 increase by 100%
 remain unaltered

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Normally for the design of transformer the ambient temperature is taken as

 32°C.
 35°C.
 27°C.
  45°C.

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
↑