Red Seal Electrician Practice
MotorsQuestion 187 of 1506

A specialized motor has a short-time rating on its nameplate. What does the rating tell you?

  1. It is for intermittent duty of 5 to 60 minutes
  2. It can run for only 5 seconds at a time
  3. It is rated for continuous duty at full load
  4. It must be cooled by a water jacket
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Correct answer: It is for intermittent duty of 5 to 60 minutes

Standard motors are rated for continuous duty. A short-time motor is made for intermittent duty of 5 to 60 minutes.

Source: Troubleshooting Motors and Controls (Dickson-Self), 6.1: Testing Motor Components

Practice motors

Questions last reviewed: 18 October 2026