• 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
Lamination of core are generally made of

 stainless steel.
 cast iron.
 silicon steel.
 carbon.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Armature reaction in dc motor results

  open circuit.
  short circuit.
  increase in speed.
  decrease in speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 220 V DC machine has an armature resistance 1 Ω. If the full load current is 20 A, the difference of induced voltage between generator and motor is

 40 V.
 20 V.
 60 V.
 0 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC series motor has which of the following characteristics?

 Has a almost constant speed.
 Can be started easily without load.
 Has its field winding consinting of thick wire and less no of turns.
 Has a poor torque.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 5 KVA transformer has a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms while that of secondary winding is 0.5+j0.8 ohms. The impedance of transformer when referred to primary will be

 3.05+j5.08 ohms
 3.5+j5.8 ohms
 53+j85 ohms
 8+j13 ohms

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The fall in speed of the DC generator due to increase in load can be corrected by

  increasing the excitation.
 cooling the armature.
  reducing the load voltage.
  increasing the input to the prime mover.

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
↑