Red Seal Electrician Practice
Motor controlsQuestion 1303 of 1506

How can the speed of a shaded pole fan motor be lowered?

  1. Switch in series reactance or change the coil taps.
  2. Add a start capacitor to the stator winding of the motor.
  3. Reverse two of the supply leads.
  4. Add a centrifugal switch to the shaft.
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Correct answer: Switch in series reactance or change the coil taps.

A series reactance limits the current and torque.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.10: Other Specialized Motors

Practice motor controls

Questions last reviewed: 18 October 2026