Revision notes by trade
Revision notes and exam-style questions, grouped by trade and level. Pick a path to start — your readiness score builds as you go. Timed mock exams live under Practice.
Plumbing — Level 2 & 3
Level 2 foundations grouped the way the job actually works, and the Level 3 design & diagnosis depth above it.
Open Free to startGas — ACS
Domestic gas ACS revision: CCN1 core safety, CENWAT, CPA1 and the appliance modules, alongside G3 unvented hot water and Water Regulations.
Open Free notesElectrical — 18th Edition & 2391
The wiring regulations (BS 7671) and inspection & testing (2391) — shock protection, devices, the test sequence and certification.
Open PremiumF-Gas & Air Source Heat Pumps
Refrigerant handling — F-Gas Category 1 (2079), GWP, leak checking and recovery — plus air source heat pumps (2924): the cycle, COP/SCOP and MCS design.
Open FreeSite safety and trade reference
Gas and water safety reminders, fluid-category tables, site-entry guidance and links to the relevant free practice.
OpenStart with a system, then test your understanding
For Level 2 plumbing revision, use the cold-water notes to trace supply and storage, then the central-heating notes for circulation and controls. Answer the free cold-water questions before rereading the explanation: it is easier to identify a gap when you first commit to an answer.
For gas ACS revision, begin with CCN1 core safety notes and then the appliance module relevant to your assessment. Use free CCN1 questions to practise the reasoning, or choose a timed test in Practice. For unvented hot water, the G3 revision notes lead from cylinder controls and expansion to discharge pipework.