Site Card Test
Course menuHS&E DUCT

Exams / HS&E DUCT / Isolating fans and plant / Question 2

HS&E DUCT practice question: Isolating fans and plant (2 of 5)

E. Specialist: HVACR – ductwork A free question from our original HS&E DUCT practice exam. Try it, then open the answer to see why each option is right or wrong.

Last verified against HSE guidance and the law ·How we write our questions

The fan isolator is in a plant room on another floor.

What does HSE say to do?

Choose one answer.

  1. A. Lock it off
  2. B. Leave a sticky note on the switch
  3. C. Trust that nobody will touch it
  4. D. Switch it off and on again to check
Show the answer and explanation

Answer: A

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

Explanation

Where someone could switch power back on, lock off the isolator.

Study

Keep practicing

Answer questions with a score at the end, or practice just this topic with the explanation after each one. No sign-up needed.

Take the free HS&E DUCT practice examPractice Isolating fans and plantAll Isolating fans and plant questions