• 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
Which type of motors are preferred in lifts?

 DC shunt motors.
 DC series motors.
 DC compound motors.
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For a DC machine having P no of pair of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance?

 PZL/4Sp²
 PZL/ 4Sa
 PZL/4Sa²
 PZL/4S

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A.

 150 V.
 240 V.
 280 V.
 220 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The 3 - Φ induction motor with rotor circuit open will

  make noise.
  run normally.
  get over heated.
  not run.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Short circuiting is caused in the armature winding due to

  grounding of two or more turns of the same coil.
 failure of insulation between two commutator bars.
  any of above.
  failure of insulation between two turns of coil.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following statement is true for an AC synchronous motor?

  It is a constant speed motor.
 It is a step angled motor.
 It is a variable speed motor.
 It is a high reluctance 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
↑