☰ Electrical Machine Design (Electrical Engineering) - MCQs

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Q1.

under full load condition, the power factor of the rotor circuit of three phase induction motor is

  • A. about 0.2 lagging
  • B. about 0.5 lagging
  • C. almost unity
  • D. about 0.8 lagging
    ✍ Discuss    
Q2.

synchronous cusps ringtone speed control of 3 phase induction motor is due to

  • A. even harmonics
  • B. odd harmonics
  • C. both odd and even harmonics
  • D. none of the above
    ✍ Discuss    
Q3.

skewing of slots

  • A. improves heat transfer
  • B. reduce noise
  • C. suppresses the undesirable harmonics
  • D. none of the above
    ✍ Discuss    
Q4.

the number of stator slots should _________ be equal to the number of rotor slots

  • A. never
  • B. always
  • C. sometimes
  • D. none of these
    ✍ Discuss    
Q5.

air gap of of polyphase induction motor is kept small to

  • A. reduce the possibility of crawling
  • B. reduce the noise
  • C. reduce magnetizing current
  • D. obtain high starting torque
    ✍ Discuss    
Q6.

in an induction motor, leakage reactance is due to _________ leakage flux

  • A. slot
  • B. overhang
  • C. differential
  • D. all of these
    ✍ Discuss    
❖ Sub Categories
➣ DC Basics and Networks ➣ Electromagnetic Field Theory ➣ Electrical Engineering Material ➣ DC Machines ➣ Synchronous Machines ➣ Induction Machines ➣ AC Basics and Networks ➣ Transmission and Distribution of Electrical Power ➣ Electrical Energy Utilisation and Electric Traction ➣ Electrical Installation and Wiring ➣ Basic Electronics Engineering ➣ Analog Electronics ➣ Digital Electronics ➣ Microprocessors ➣ Electronic and Electrical Measurements and Instruments
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