• 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
In an induction motor, what is the ratio of rotor input to rotor copper loss?

 1/S
 1/(1-S)
 S
 1-S

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC generator can be considered as

 rectifier.
 power pump.
 prime mover.
 rotating amplifier.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A small air gap in poly phase induction motor helps to

 reduce chance of crawling.
 reduce chance of cogging.
 increase starting torque.
  reduce magnetizing current.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The counter (or back) emf in a dc machine is 1. the same as generated emf in a dc motor 2. proportional to field flux and armature speed 3. not the same as generated emf in a dc motor 4.inversely proportional to field flux 5. proportional to number of armature conductors 6. constant from no load to full load From these, the correct answer is

 2, 4, 5, 6
 1, 2, 5
 3, 4, 5
 2, 3, 6

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a dc machine 72 number of coils are used. Find the number of commutator segments required?

 72
 36
 74
 37

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An inverted V-curve of synchronous motor shows the variation of

 power factor and dc excitation at constant load
 power factor and supply voltage during hunting
 supply voltage and field current at constant excitation
All of these

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
↑