1) What is the main purpose of central heating? a) A. Heat one room efficiently b) B. Provide thermal comfort throughout a property c) C. Reduce installation costs d) D. Replace open fires only 2) What outside temperature must full central heating achieve comfort at? a) A. 0°C b) B. -5°C c) C. -10°C d) D. -15°C 3) Selective central heating allows: a) A. All rooms heated equally b) B. No temperature control c) C. Selected rooms to be heated d) D. Heating by gravity only 4) Background heating is mainly installed based on: a) A. Performance b) B. Efficiency c) C. Cost d) D. Regulations 5) Which system relies on convection currents to circulate water? a) A. Fully pumped b) B. Sealed system c) C. Gravity system d) D. Combination system 6) Which pipe size is commonly associated with gravity systems? a) A. 15mm b) B. 22mm c) C. 28mm d) D. 10mm 7) Why are full gravity systems no longer installed? a) A. Too expensive b) B. Slow heat-up times c) C. Poor insulation d) D. Excessive pressure 8) Why can inhibitor NOT be added to a primatic system? a) A. It blocks radiators b) B. It damages the boiler c) C. It breaks the air lock d) D. It corrodes pipework 9) What is a key disadvantage of one-pipe systems? a) A. High installation cost b) B. Each radiator cools progressively c) C. No circulation pump d) D. No hot water 10) One-pipe systems are NOT compliant with: a) A. Part J b) B. Part P c) C. Part L d) D. BS 7593 11) What type of system has pumped heating and gravity hot water? a) A. Fully pumped b) B. Two-pipe semi-gravity c) C. Sealed system d) D. Combination system 12) Two-pipe systems allow radiators to: a) A. Heat sequentially b) B. Operate without controls c) C. Reach the same temperature d) D. Use gravity only 13) What additional control makes a C-Plan Plus compliant? a) A. Boiler thermostat only b) B. Room thermostat and TRVs c) C. Larger pipe sizes d) D. Expansion vessel 14) The minimum acceptable Part L1b compliant system is: a) A. One-pipe system b) B. Two-pipe semi-gravity c) C. C-Plan Plus d) D. Fully gravity 15) Why is a heat sink used on solid fuel systems? a) A. Improve efficiency b) B. Reduce fuel use c) C. Prevent overheating d) D. Increase pressure 16) Fully pumped systems use a pump to circulate: a) A. Hot water only b) B. Heating only c) C. Both heating and hot water d) D. Cold water 17) A Y-Plan uses which valve? a) A. Two port b) B. Three port mid-position c) C. Diverter d) D. Check valve 18) An S-Plan system uses: a) A. One zone valve b) B. Two zone valves c) C. No valves d) D. A diverter valve 19) What does an automatic bypass valve prevent? a) A. Cold spots b) B. Pump damage c) C. Boiler corrosion d) D. Over-venting 20) Lock-out occurs when the boiler detects: a) A. Low pressure b) B. Gas loss c) C. Excess temperature d) D. Air ingress 21) Aeration causes: a) A. Limescale b) B. Magnetite c) C. Condensate d) D. Expansion 22) A sealed system replaces the F&E with: a) A. Manifold b) B. Filling loop c) C. Expansion vessel d) D. Air separator 23) What pressure source fills a sealed system? a) A. Gravity b) B. Expansion vessel c) C. Boiler pump d) D. Mains water 24) Why must a filling loop be disconnected? a) A. Prevent leaks b) B. Reduce pressure c) C. Water Regulations d) D. Improve efficiency 25) What safety device discharges excess pressure? a) A. ABV b) B. PRV c) C. FOV d) D. TRV 26) Sealed systems operate at: a) A. Atmospheric pressure b) B. Negative pressure c) C. Positive pressure d) D. Zero pressure 27) A feed and expansion cistern is located: a) A. Below the boiler b) B. At floor level c) C. At highest point d) D. Near radiators 28) What is the minimum rise of an open vent above water level? a) A. 150mm b) B. 300mm c) C. 450mm d) D. 600mm 29) What size must the open vent pipe be? a) A. 15mm b) B. 18mm c) C. 22mm d) D. 28mm 30) The system water expands by approximately: a) A. 2% b) B. 3% c) C. 4% d) D. 5%

Central Heating

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