• 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 dc machines, the space distribution of air-gap flux density wave at no load is

 rectangular
 flat-topped
 co- sinusoidal
 sinusoidal

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is

 2, 3, 4, 5
 2, 3, 4
 1, 2, 3
 2, 3 ,5

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In dc machines, the space waveform of the air-gap flux distribution affects

 voltage but not the torque
 torque but not the voltage
 both the torque and voltage
 neither the voltage nor the torque

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In dc machines, the field-flux axis and armature-mmf axis are respectively along

 quadrature axis and interpolar axis
 quadrature axis and direct axis
 direct axis and interpolar axis
 direct axis and indirect axis

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The brush-axis of a bipolar dc motor is rotated by 90°. The effect of this rotation on the back emf Eband the torque developed Tdwould be such that

 Eb is zero, but Td is unchanged
 both Eb and Td are unchanged
 Eb is unchanged, but Td is zero
 both Eb and Td are zero

ANSWER DOWNLOAD EXAMIANS APP
  • «
  • 1
  • ...
  • 187
  • 188
  • 189
  • 190
  • 191
  • ...
  • 203
  • »

GO TO PAGE

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
↑