• 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
In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as

 2 to 3.
 3 to 5.
 1.0.
  1.5 to 2.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Stray losses in transformer occurs in

 transformer insulating oil.
 steel core.
  winding conductors and steel structures of transformer.
 paper insulation in transformers.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is

 less and maximum torque decreases
 more and maximum torque decreases
 less and maximum torque increases
 more and maximum torque remains constant

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is

 (1/2)Fmax.
 3Fmax.
  (3/2)Fmax.
 Fmax.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is

 2, 3
 1, 4
 1, 3
 2, 4

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Induction motors have the advantage of

  simple in construction.
  less maintenance.
  all of below.
  less cost.

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
↑