• 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
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency?

 96%
 92%
 95%
 94%

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is

 1000
 1200
 1203
 1080

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
When operating, two or more transformers in parallel, % impedance of these transformers should be

  same.
 proportionate to MVA rating of transformers.
 inversely proportional to MVA rating of transformers.
 such that actual impedance of all transformers would be same.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp?

 40 V.
 90 V.
 60 V.
 30 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field?

 Zero
None of these
 Slip speed
 Synchronous speed

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
What type of dielectric material is used in capacitors used for fans and for power factor correction?

  Glass.
  Vacuum.
  Mica.
  Oil impregnated paper.

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
↑