Red Seal Electrician Practice
Safety and work practicesQuestion 604 of 1506

An electrician locks out the electrical supply to a motor that drives a hoist. The hoist holds a raised load on a cable. What else must be dealt with to reach a Zero Energy State?

  1. Nothing, because only voltage counts as stored energy.
  2. The cable must be cut so the motor can spin freely.
  3. The motor must be run until the load is hoisted higher.
  4. The suspended weight must be lowered or supported.
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Correct answer: The suspended weight must be lowered or supported.

A zero energy state removes all stored energy, including suspended weight, spring and fluid pressure, as well as voltage.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 3.5: Safe Practices

Practice safety and work practices

Questions last reviewed: 18 October 2026