Single Phase Motor Over Current Device Rating Quiz
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Questions and Answers

What is the over current device rating for the single phase motor with a full load current of 28 A?

  • 30 A (correct)
  • 25 A
  • 40 A
  • 20 A

    • Why should the over current device rating be higher than the full load current for the single phase motor?

  • To ensure smooth operation
  • To reduce power consumption
  • To decrease the motor's efficiency
  • To prevent tripping during start-up surges and temporary overloads (correct)

    • What could happen if the over current device rating is lower than the full load current for the single phase motor?

  • Frequent tripping of the motor (correct)
  • Improved motor efficiency
  • Reduced start-up surges
  • Extended motor lifespan

    • If the over current device rating for the single phase motor is 25 A, what could be the potential consequence?

    <p>Tripping during high load conditions</p> Signup and view all the answers

    Which of the following phase sequences for a 3-phase motor is usually considered 'backward'?

    <p>CBA</p> Signup and view all the answers

    What happens if the phase sequence of a 3-phase motor is 'backward'?

    <p>The motor experiences reverse rotation</p> Signup and view all the answers

    Why is it important to use the correct phase sequence in a 3-phase motor?

    <p>To ensure proper rotation of the motor</p> Signup and view all the answers

    What can occur if the phase sequence is incorrect in a 3-phase motor?

    <p>Undesirable vibration in the motor</p> Signup and view all the answers

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