• 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
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

 minimum
 zero
 maximum
All of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by

 Kef2Kf2Bm.
 Kef2KfBm2.
  Kef2Kf2Bm2.
 KefKf2Bm2.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A single phase transformer has specifications as 250 KVA, 11000 V/415 V, 50 Hz. What are the values of primary and secondary currents?

 primary = 22.7 A, secondary = 602.4 A
 primary = 11.4 A, secondary = 301 A
 primary = 602 A, secondary = 22.7 A
 primary = 301 A, secondary = 22.7 A

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Variation in speed by ward-Leonard control of DC motors occurs due to variation in

  Armature current.
  Field excitaion.
  Armature voltage.
  Supply voltage.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The back emf produced in a dc motor depends on

  Z.
  P and Z.
  P.
  none of these.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The type of DC motor used for shears and punches is

 Differential compound motor.
  Cummulative compound motor.
 Shunt motor.
 Series motor.

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
↑