☰ Synchronous Machines (Electrical Engineering) - MCQs

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Q13.

single phase induction motor built with variable air fan without DC excitation is called the _______ motor

  • A. reluctance
  • B. hysteresis
  • C. repulsion
  • D. split phase
    ✍ Discuss    
Q14.

which of the following motor is not a synchronous motor?

  • A. hysteresis
  • B. repulsion
  • C. inductor
  • D. reluctance
    ✍ Discuss    
Q15.

a stationary alternator should not be connected to the live bus-bar because

  • A. it is likely to operate as a synchronous motor
  • B. it will get short circuited
  • C. it will reduce bus-bar voltage
  • D. all of the above
    ✍ Discuss    
Q16.

an infinite bus bar

  • A. constant voltage
  • B. constant frequency
  • C. infinity voltage
  • D. both a and b
    ✍ Discuss    
Q17.

the rotorr copper losses of a synchronous motor are meet by

  • A. armature input
  • B. DC source
  • C. AC supply mains
  • D. none of these
    ✍ Discuss    
Q18.

during short circuit test on a synchronous motor ________ is/are short circuited

  • A. armature terminals
  • B. field terminals
  • C. all stator phade windings
  • D. one of the stator phase winding
    ✍ Discuss    
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