• 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
Universal motor have which of the following application?

  Lift.
  Domestic pump.
  Food mixer.
  Traction.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For the speed control of polyphase squirrel cage induction motor, if frequency of operation is decreased with

 constant V, Tst increases
 either of these
 constant supply voltage V, starting torque Tst decreases
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

 541.67V, 200 rpm.
 2166.67V, 270 rpm.
 2166.67V, 230 rpm.
 541.67V, 250 rpm.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A commutator in dc machine provide ----------------- rectification?

 full wave controlled
 half wave
 half wave controlled
 full wave

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC generator sparking between brushes and commutator surface may be due to

  any of the above.
  too rapid reversal of current.
  under commutation.
 over commutation.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will

 get damaged.
 not start automatically.
 start automatically without trouble.
 develop very low starting torque.

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
↑