Wiring and componentsQuestion 192 of 1506

A fan has three speeds. A switch puts different resistors in series with the motor. What is this resistor type called?

  1. A stepped (tapped) resistor
  2. A single fixed resistor
  3. A rheostat with a wiper
  4. A thermal limiter
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Correct answer: A stepped (tapped) resistor

A stepped resistor has several fixed values that a switch selects. Each value gives a different fan speed.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 5.5: Circuit Control Devices

Practice wiring and components

Questions last reviewed: 18 October 2026