☰ Synchronous Machines (Electrical Engineering) - MCQs

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Q7.

the input to a stepper motor is in the form of

  • A. frictional force
  • B. electric pulses
  • C. mechanical inertia
  • D. viscous damping force
    ✍ Discuss    
Q8.

a stepper motor is a _______ device

  • A. hydraulic
  • B. pneumatic
  • C. electromechanical
  • D. dynamic
    ✍ Discuss    
Q9.

a hysteresis motor

  • A. is a self start motor
  • B. is a constant speed motor
  • C. does not need dc excitation
  • D. all of the above
    ✍ Discuss    
Q10.

in an hysteresis motor, the rotor core must have

  • A. retentivity
  • B. susceptibility
  • C. resistivity
  • D. none of these
    ✍ Discuss    
Q11.

the rotor of hysteresis motor is made of magnetic material having area of hysteresis loop

  • A. large
  • B. very small
  • C. medium
  • D. any of the above
    ✍ Discuss    
Q12.

hysteresis motor is a

  • A. synchronous induction motor
  • B. single phase induction motor
  • C. single phase synchronous motor without any salient pole and without dc excitation
  • D. single phase synchronous motor with salient poles and without dc excitation
    ✍ Discuss    
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