• HOME
  • QUIZ
  • CONTACT US
EXAMIANS
  • COMPUTER
  • CURRENT AFFAIRS
  • ENGINEERING
    • Chemical Engineering
    • Civil Engineering
    • Computer Engineering
    • Electrical Engineering
    • Mechanical Engineering
  • ENGLISH GRAMMAR
  • GK
  • GUJARATI MCQ

Three Phase Induction Motors

Three Phase Induction Motors
The efficiency of an induction motor can be expected to be nearly

80 to 90%
99%
60 to 90%
95 to 98 %

ANSWER DOWNLOAD EXAMIANS APP

Three Phase Induction Motors
Very large 3-phase induction motors (greater than 25 HP) are started _____

Star-delta starting
None of the listed here
Direct on line
By auto transformer starting

ANSWER DOWNLOAD EXAMIANS APP

Three Phase Induction Motors
If any two phases for an induction motor are interchanged

The motor will run at reduced speed
The motor will burn
The motor will run in reverse direction
The motor will not run

ANSWER DOWNLOAD EXAMIANS APP

Three Phase Induction Motors
The speed of a squirrel-cage induction motor can be controlled by all of the following except

Reducing supply voltage
Changing winding resistance
Changing supply frequency
Changing number of poles

ANSWER DOWNLOAD EXAMIANS APP

Three Phase Induction Motors
Insertion of resistance in the rotor of an induction motor to develop a given torque

Increases the rotor current
Rotor current remains same
Decreases the rotor current
Rotor current becomes zero

ANSWER DOWNLOAD EXAMIANS APP

Three Phase Induction Motors
A high starting torque can be obtained in a 3phase induction motor by _______

Increasing rotor resistance
Increasing rotor reactance
None of the listed here
Decreasing rotor resistance

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Three Phase Induction Motors

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
↑