Red Seal Electrician Practice
MotorsQuestion 1257 of 1506

Which statement about torque and current of a running induction motor is correct?

  1. A motor can carry more than its rated torque all day.
  2. Only the starting current is able to damage the motor.
  3. Torque above the rated value raises the motor efficiency.
  4. Steady running above rated torque can damage the motor.
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Correct answer: Steady running above rated torque can damage the motor.

Heavy torque and current are fine for a few seconds at start. Held steadily, they overheat and damage the motor.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.7: Tesla Polyphase Induction Motors

Practice motors

Questions last reviewed: 18 October 2026