☰ Induction Machines (Electrical Engineering) - MCQs

These are four options provided for the answers of the question only one option is right answer. You have to click any of the option to check your answer. You can also directly see the answer from the answer link below. if you want to see explaination of the answer you can click discuss link.

if a squirrel cage induction motor run hot, the probable causes could be

  • A. uneven air gap
  • B. overload
  • C. low supply frequency
  • D. any of these

    ✍ Discuss    

the speed of a slip ring induction motor cannot be controlled by

  • A. rotor resistance control
  • B. pole changing method
  • C. concatenation or cascade operation
  • D. rotor slip power control

    ✍ Discuss    

the rotor resistance control of induction motor, the hardness of speed torque characteristics

  • A. increases
  • B. decreases
  • C. remains same
  • D. none of these

    ✍ Discuss    

the speed regulation of a three phase induction motor at full load is about

  • A. 4%
  • B. 8%
  • C. 15%
  • D. 25%

    ✍ Discuss    

decrease in supply voltage to a three phase induction motor will not cause

  • A. any difficulty in accelerating the load
  • B. increase in torque
  • C. decrease in speed as well as in core loss
  • D. increasing in stator as well as rotar current

    ✍ Discuss    

single phase preventer

  • A. suppresses negative sequence currents
  • B. compensates for voltage drops
  • C. provides protection in the event of non availability of one of the phases
  • D. none of the above

    ✍ Discuss