Red Seal Electrician Practice
MotorsQuestion 350 of 1506

What does a nameplate service factor tell you?

  1. The torque the motor produces at starting
  2. How much overload it can handle at normal voltage
  3. The efficiency of the motor when at half load
  4. The highest ambient temperature it can take
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Correct answer: How much overload it can handle at normal voltage

A 1.15 factor means it can briefly handle 15% above rated load.

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

Practice motors

Questions last reviewed: 18 October 2026