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HS&E SAF practice question: Isolation and permits (2 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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The isolator for a chiller is in a different room from where you will work.

What does HSE say?

Choose one answer.

  1. A. Hope nobody goes in there
  2. B. Take the room key home
  3. C. Lock it off
  4. D. Leave a note on the switch
Show the answer and explanation

Answer: C

  • A. Wrong: Wrong. Lock it off.
  • B. Wrong: Wrong. Lock off the isolator itself.
  • C. Right: Right. HSE says lock off machines if there is a chance the power could be accidentally switched back on.
  • D. Wrong: Wrong. A note won't stop someone.

Explanation

Lock off isolators that someone could switch back on.

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