• 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
For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio

 50%
 57.7%
 66.3%
 33.3%

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What is the highest possible speed of turbo alternators?

 3000 rpm
 4000 rpm
 1000 rpm
 1500 rpm

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Poles of DC machine are often laminated to

 dissipate more heat.
 reduce pulsation loss.
 reduce iron weight.
 reduce armature reaction.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A commutator in dc machine provide ----------------- rectification?

 full wave controlled
 half wave
 full wave
 half wave controlled

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be

  2 Ω.
 8 Ω.
 10 Ω.
  4 Ω.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Armature reaction in DC generators will result in

 increase in slip.
 open circuit.
 short circuit.
 reduction in generated 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
↑