☰ Induction Machines (Electrical Engineering) - MCQs

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Q19.

in which of the following tests to be conducted on induction motors, reduced voltage is applied

  • A. blocked rotor test
  • B. no load test
  • C. both a and b
  • D. none of these

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Q20.

open circuit test is usually conducted on

  • A. slip-rings motors
  • B. wound rotor motors
  • C. either of a and b
  • D. none of these

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Q21.

the power factor of three phase induction motor is likely to be maximum when it will operate at

  • A. full load
  • B. no load
  • C. maximum slip
  • D. maximum torque

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Q22.

the no load current in an induction motor is ________ in comparison to that of a power transformer

  • A. much lower
  • B. much higher
  • C. slightly less
  • D. slightly more

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Q23.

the synchronous watt is

  • A. the torque which under synchronous speed would develop of power of one watt or power input to rotate in watts
  • B. shaft output in watts
  • C. input power to stator
  • D. the unit of ratings of synchronous machine

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Q24.

three phase induction motor iron losses mainly occur in

  • A. stator and rotor
  • B. rotor core and rotor teeth
  • C. stator core and stator teeth
  • D. stator winding

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