Exams / HS&E HAPS / Hot water and legionella / Question 5
HS&E HAPS practice question: Hot water and legionella (5 of 5) E. Specialist: HVACR – heating and plumbing services A free question from our original HS&E HAPS practice exam. Try it, then open the answer to see why each option is right or wrong.
Last verified October 2026 against HSE guidance and the law ·How we write our questions
A building's hot water system has been extended to a new wing.
What does HSE say about the legionella risk assessment?
Choose one answer.
A A. Throw it awayB B. Wait for someone to fall illC C. Review it after significant changesD D. Leave it, as it was done when the building openedShow the answer and explanation Answer: C
A. Wrong: Wrong. Review and update it.B. Wrong: Wrong. Review it after significant changes, before anyone falls ill.C. Right: Right. HSE says review the risk assessment if there are significant changes, such as the water system being extended.D. Wrong: Wrong. Review it after significant changes.Explanation Review the legionella risk assessment when the system changes significantly.
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