• 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
As compared to an induction motor, the air gap in a DC motor is

 same.
 more.
 less than 50%.
 between 50% and 90%.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The rotor speed of an induction motor is given by

  Ns = 120f /p × ( 1 - r).
None of these
  Ns = 120f / p × ( 1 - s ).
  Nr = 120f / p × (1-s).

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW?

 48 Hz
 48.5 Hz
 50 Hz
 45 HZ

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be

  1.2 mWb.
 3.5 mWb.
 1.4 mWb.
 2.7 mWb.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC generator without commutator is a

 DC generator
 DC motor
 induction motor
 AC generator

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Motors for fans and pumps are selected in the rpm range

  375 to 500.
  720 to 920.
  500 to 720.
  1440 to 2880.

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
↑