• 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
The heat generated in the transformer is dissipated mainly by

 conduction.
  convection.
 radiation.
All of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is

 36.36% increase
 36.36% decrease
 18.18% increase
 36.36% increase

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The armature of a DC motor is laminated to reduce

 friction and windage loss.
 eddy current loss.
 copper loss.
 hysteresis loss.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to

 Ia
 Ia2
 I/Ia2
 1/Ia

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Belt conveyors offer _______________ starting torque.

  medium.
  high.
  low.
  zero.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by

 Khf2Bm1.6.
 KhfBm3.
  KhfBm1.6.
 KhfBm.

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
↑