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MCQs

Total Questions : 233 | Page 3 of 24 pages
Question 21. The wattage of motor for driving domestic sewing machine will be around
  1.    100 to 150 W
  2.    40 to 75 W
  3.    10 to 30 W
  4.    5 to 10 W
 Discuss Question
Answer: Option A. -> 100 to 150 W
Question 22. Short-circuiter is used in
  1.    Repulsion induction motor
  2.    Repulsion motor
  3.    Repulsion start induction run motor
  4.    None of the above
 Discuss Question
Answer: Option C. -> Repulsion start induction run motor
Question 23. The capacitors used in single-phase capacitor motors have no
  1.    voltage rating
  2.    dielectric medium
  3.    polarity marking
  4.    definite value
 Discuss Question
Answer: Option C. -> polarity marking
Question 24. Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because
  1.    it is comparatively cheaper
  2.    it has almost non-destructible capacitor
  3.    it has low starting as well as running currents at relatively high power factor
  4.    it is quiet in operation
 Discuss Question
Answer: Option C. -> it has low starting as well as running currents at relatively high power factor
Question 25. Which of the following motors is used in tape-recorders ?
  1.    Hysteresis motor
  2.    Reluctance motor
  3.    Capacitor-run motor
  4.    Universal motor
 Discuss Question
Answer: Option A. -> Hysteresis motor
Question 26. Which of the following motors is used in a situation where load increases with speed ?
  1.    Induction motor
  2.    Three-phase series motor
  3.    Schrage motor
  4.    Hysteresis motor
 Discuss Question
Answer: Option B. -> Three-phase series motor
Question 27. Which of the following single-phase motors is suitable for timing and control purposes ?
  1.    Reluctance motor
  2.    Series motor
  3.    Repulsion motor
  4.    Universal motor
 Discuss Question
Answer: Option A. -> Reluctance motor
Question 28. Which of the following motors has two separate windings on the motor ?
  1.    Repulsion motor
  2.    Repulsion induction motor
  3.    Repulsion start induction run motor
  4.    None of the above
 Discuss Question
Answer: Option B. -> Repulsion induction motor
Question 29. In a single phase motor the centrifugal switch
  1.    disconnects auxiliary winding of the motor
  2.    disconnects main winding of the motor
  3.    reconnects the main winding the motor
  4.    reconnects the auxiliary winding of the motor
 Discuss Question
Answer: Option A. -> disconnects auxiliary winding of the motor
Question 30. A single-phase induction motor is
  1.    inherently self-starting with high torque
  2.    inherently self-starting with low torque
  3.    inherently non-self-starting with low torque
  4.    inherently non-self-starting with high torque
 Discuss Question
Answer: Option C. -> inherently non-self-starting with low torque

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