• 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
Hysteresis loss will depends on

 f³
 f²
 f1.6
 f

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For high current and low current rating which winding is employed to DC machine?

 None of above
 Wave winding
 Both lap and wave winding
 Lap winding

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be

 57.1%.
 59.2%.
 48.0%.
 88.8%.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 500 V, 55 kVA single phase alternator has an effective resistance of 0.5 Ω. An excitation current of 10 A produces 200 A armature current on short circuit and an emf of 450 V on per circuit. The synchronous reactance will be

 2.781 Ω.
  2.241 Ω.
 25.564 Ω.
 2.74 Ω.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The rotor of a 3 - Φ wound induction motor is provided with

  three phase winding.
  heavy short-circuited end rings.
  heavy copper or aluminium bars placed in rotor slots.
  single phase winding.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

 1/√3, 1/3
 1/3, 1/3
 1/3, 1/√3
 1/√3, 1/√3

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
↑