Exams / HS&E RAAC / Pressure, gases and plant rooms
Pressure, gases and plant rooms questions for the Refrigeration and air conditioning (RAAC) specialist test 5 free questions on Pressure, gases and plant rooms, from section E. Specialist: HVACR – refrigeration and air conditioning. Every question is original and explains why each option is right or wrong.
Last verified October 2026 against HSE guidance and the law ·How we write our questions
A trainee asks why there are regulations for pressure systems.
What does HSE say PSSR aims to prevent?
Choose one answer.
A A. High electricity billsB B. Serious injury from stored energyC C. Noise complaints from neighbours near the plantD D. Leaks of water onto carpetsShow the answer and explanation Answer: B
A. Wrong: Wrong. It is about stored energy.B. Right: Right. HSE says PSSR aims to prevent serious injury from the hazard of stored energy if a pressure system fails.C. Wrong: Wrong. It is about stored energy.D. Wrong: Wrong. It is about stored energy.Explanation PSSR aims to prevent serious injury from stored energy when pressure systems fail.
Study You are commissioning a pressure system in a plant room.
What must be in place before it is first used?
Choose one answer.
A A. A bright paint finish so it is seenB B. Nothing, as new kit is safeC C. A written scheme of examinationD D. A warranty card from the supplierShow the answer and explanation Answer: C
A. Wrong: Wrong. A WSE and an examination are needed.B. Wrong: Wrong. A WSE and an examination are needed.C. Right: Right. HSE says before use, a written scheme of examination must be in place and an examination carried out.D. Wrong: Wrong. A WSE and an examination are needed.Explanation Pressure systems need a written scheme of examination, and an examination, before use.
Study An engineer is examining a pressure system and finds a defect that could cause imminent danger.
What does HSE say the competent person must do?
Choose one answer.
A A. Ignore it until the next examinationB B. Fix it in secret without telling anyoneC C. Only mention it if askedD D. Identify the action neededShow the answer and explanation Answer: D
A. Wrong: Wrong. They must identify the action needed.B. Wrong: Wrong. They must tell the user or owner.C. Wrong: Wrong. They must identify the action needed.D. Right: Right. HSE says the competent person must identify action in case of imminent danger, and notify the user or owner of repairs needed.Explanation In imminent danger, the competent person identifies the action needed and tells the user or owner.
Study A client asks what maintenance their pressure plant needs.
What does HSE say?
Choose one answer.
A A. Planned maintenance of the whole systemB B. Only fixing it when it leaksC C. Only cleaning the outsideD D. None, as long as it passed its last examinationShow the answer and explanation Answer: A
A. Right: Right. HSE says carry out suitable maintenance, including a whole-system programme that considers age, use and environment.B. Wrong: Wrong. Plan maintenance for the whole system.C. Wrong: Wrong. Plan maintenance for the whole system.D. Wrong: Wrong. Maintenance is still needed.Explanation Plan whole-system maintenance for pressure plant, based on its age, use and environment.
Study A plant room in a basement is small, enclosed and has poor ventilation.
Which danger does HSE list for confined spaces?
Choose one answer.
A A. Getting lost in the corridorsB B. Not enough oxygen to breatheC C. Too much natural daylightD D. Sore feet from standingShow the answer and explanation Answer: B
A. Wrong: Wrong. HSE lists lack of oxygen.B. Right: Right. HSE lists reduced oxygen levels among the dangers of confined spaces, with fumes, flooding and fire.C. Wrong: Wrong. HSE lists lack of oxygen.D. Wrong: Wrong. HSE lists lack of oxygen.Explanation Enclosed spaces can lack oxygen. Avoid entry where possible and plan the controls.
Study Study Pressure, gases and plant rooms More E. Specialist: HVACR – refrigeration and air conditioning topics