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HS&E SAF practice question: Water hygiene (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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You check hot water temperatures in a building.

What should hot water be stored at?

Choose one answer.

  1. A. About 30°C
  2. B. About 40°C, to save energy
  3. C. Below 20°C
  4. D. At least 60°C
Show the answer and explanation

Answer: D

  • A. Wrong: Wrong. That is far too low.
  • B. Wrong: Wrong. That is in the range legionella likes.
  • C. Wrong: Wrong. That is the cold water figure.
  • D. Right: Right. HSE says hot water should be stored at 60°C or more.

Explanation

Store hot water at 60°C or more.

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