• 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
Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H?

 1 V
 0 V
 2 V
 4 V

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A?

 21%
 11%
 41%
 10%

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A large series motor is never started without some mechanical on it because otherwise it will

 Draw too much current.
 Open fuse or circuit breaker.
  Develop excessive speed and damage itself.
 Produce sparking at brushes.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
At slip s = 1 torque developed in machine is

  starting torque.
  maximum torque.
  none.
  electromagnetic torque.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The armature shaft must be able to with stand

 Twisting stains due to transmission of torque.
All of these
 Bending moment due to weight of the armature.
 Any unbalanced magnetic pull on the armature core.

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
↑