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HS&E PLUM practice question: Gas work and gas safety (5 of 6)

E. Specialist: Plumbing (JIB) A free question from our original HS&E PLUM 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

A customer wants the air vent in their boiler room blocked up to stop draughts.

What should you tell them?

Choose one answer.

  1. A. It can be blocked in winter only
  2. B. It can be blocked if the door is left open
  3. C. It can be blocked with foam if a carbon monoxide alarm is fitted
  4. D. It mustn't be blocked, as the boiler needs air
Show the answer and explanation

Answer: D

  • A. Wrong: Wrong. The appliance needs air all year.
  • B. Wrong: Wrong. Don't block air inlets.
  • C. Wrong: Wrong. Air inlets must not be blocked.
  • D. Right: Right. HSE says rooms with gas appliances need adequate ventilation, and air inlets must not be blocked.

Explanation

Never block air inlets, flues or chimneys for gas appliances. Without air, they can make carbon monoxide.

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