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MCQs

Total Questions : 233 | Page 1 of 24 pages
Question 1. In a split phase motor
  1.    the starting winding is connected through a centrifugal switch
  2.    the running winding is connected through a centrifugal switch
  3.    both starting and running windings are connected through a centrifugal switch
  4.    centrifugal switch is used to control supply voltage
 Discuss Question
Answer: Option A. -> the starting winding is connected through a centrifugal switch
Question 2. In a ceilingfan employing capacitor run motor
  1.    secondary winding surrounds the primary winding
  2.    primary winding surrounds the secondary winding
  3.    both are usual arrangements
  4.    none of the above
 Discuss Question
Answer: Option A. -> secondary winding surrounds the primary winding
Question 3. Which type of load is offered by cranes and hoists ?
  1.    Gradually varying load
  2.    Non-reversing, no-load start
  3.    Reversing, light start
  4.    Reversing, heavy start
 Discuss Question
Answer: Option D. -> Reversing, heavy start
Question 4. Which of the following motors is preferred for tape-recorders?
  1.    Shaded pole motor
  2.    Hysteresis motor
  3.    Two value capacitor motor
  4.    Universal motor
 Discuss Question
Answer: Option B. -> Hysteresis motor
Question 5. Which of the following motors is used in mixies ?
  1.    Repulsion motor
  2.    Reluctance motor
  3.    Hysteresis motor
  4.    Universal motor
 Discuss Question
Answer: Option D. -> Universal motor
Question 6. A hysteresis motor works on the principle of
  1.    hysteresis loss
  2.    magnetisation of rotor
  3.    eddy current loss
  4.    electromagnetic induction
 Discuss Question
Answer: Option A. -> hysteresis loss
Question 7. The value of starting capacitor of a fractional horse power motor will be
  1.    100 uF
  2.    200 uF
  3.    300 uF
  4.    400 uF
 Discuss Question
Answer: Option C. -> 300 uF
Question 8. In a two value capacitor motor, the capacitor used for running purposes is
  1.    air capacitor
  2.    paper spaced oil filled type
  3.    ceramic type
  4.    a.c. electrolytic type
 Discuss Question
Answer: Option B. -> paper spaced oil filled type
Question 9. In capacitor start single-phase motors
  1.    current in the starting winding leads the voltage
  2.    current in the starting winding lags the voltage
  3.    current in the starting winding is in phase with voltage in running winding
  4.    none of the above
 Discuss Question
Answer: Option A. -> current in the starting winding leads the voltage
Question 10. In a hysteresis motor, the rotor must have
  1.    retentivity
  2.    resistivity
  3.    susceptibility
  4.    none of the above
 Discuss Question
Answer: Option A. -> retentivity

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