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HS&E SAF practice question: Isolation and permits (1 of 5)

E. Specialist: HVACE – services and facilities maintenance A free question from our original HS&E SAF practice exam. Try it, then open the answer to see why each option is right or wrong.

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You are about to service a pump set in a building's plant room.

What must happen first?

Choose one answer.

  1. A. Ask a colleague to watch the switch
  2. B. Stop the plant and isolate the power
  3. C. Work on it while it runs slowly
  4. D. Switch it off at the remote panel only
Show the answer and explanation

Answer: B

  • A. Wrong: Wrong. Isolate the supply.
  • B. Right: Right. HSE says ensure moving plant has stopped and isolate electrical and other power supplies.
  • C. Wrong: Wrong. Stop and isolate it first.
  • D. Wrong: Wrong. Isolate the supply.

Explanation

Stop and isolate plant before maintenance.

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