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HS&E LAEE practice question: Isolation and maintenance (3 of 6)

E. Specialist: Lifts and escalators A free question from our original HS&E LAEE practice exam. Try it, then open the answer to see why each option is right or wrong.

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A hydraulic lift is being repaired.

What does HSE say about stored energy?

Choose one answer.

  1. A. Only worry about it in winter
  2. B. Release it first
  3. C. Leave it, as the power is off
  4. D. Top it up before you start
Show the answer and explanation

Answer: B

  • A. Wrong: Wrong. Stored energy is a risk at any time.
  • B. Right: Right. HSE says release stored energy, such as hydraulic pressure, that could make a machine move.
  • C. Wrong: Wrong. Stored pressure can move the lift with the power off.
  • D. Wrong: Wrong. That adds more stored energy.

Explanation

Release stored energy, such as hydraulic pressure, before maintenance.

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