Red Seal Electrician Practice
MotorsQuestion 1305 of 1506

What is the use of a hysteresis motor?

  1. High torque drives for large cranes in a steel mill
  2. Variable speed fans in buildings
  3. Very small constant speed drives, such as clocks
  4. Starting of large water pumps
Show answer

Correct answer: Very small constant speed drives, such as clocks

It is a low torque synchronous motor, so only very small sizes exist.

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

Practice motors

Questions last reviewed: 18 October 2026