25 free questions
Level 2Cold Water Systems
Direct and stored supplies, cistern storage, float-operated valves and protecting the supply from backflow.
126 questions 13 study notes
Plumbing revision
Plumbing revision
Level 2 and Level 3 plumbing theory revision, with study notes, diagrams and exam-style questions. Choose a system below, learn how it works, then check your understanding in practice.
- 1,990 exam-style questions
- 156 study notes
- 16 modules
Try 25 questions each in Cold Water Systems, Central Heating and Field Diagnostics. Premium unlocks the full plumbing question bank and timed mocks.
Water In
Getting clean water in — the cold supply and storage, and the science behind pressure and flow.
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Level 2Scientific Principles
The science behind the trade — pressure and head, heat and expansion, flow and units.
128 questions 14 study notes
Heat & Hot Water
Heating it and storing it safely — hot water and central heating systems.
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Level 2Hot Water Systems
Vented and unvented hot water, safe delivery temperatures, expansion and secondary circulation.
125 questions 11 study notes
25 free questions
Level 2Central Heating
System layouts, controls and interlock, emitters and balancing for domestic heating.
106 questions 10 study notes
Water Out
Taking water away — drainage, sanitation and rainwater.
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Level 2Drainage & Sanitation
Trap seals, branch pipework and stack ventilation, and keeping the system free of contamination.
125 questions 11 study notes
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Level 2Rainwater Systems
Gutters and downpipes, sizing for rainfall and safe surface-water discharge.
126 questions 7 study notes
Work Safe & Smart
Working safely and to standard — health & safety, the core processes and safe electrical isolation.
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Level 2Health & Safety
Safe isolation, working at height, COSHH and asbestos awareness, PPE and CSCS card basics.
127 questions 6 study notes
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Level 2Common Plumbing Processes
Jointing methods and materials, tools and measuring, and the UK qualification routes.
150 questions 10 study notes
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Level 2Electrical Safety & Isolation
Safe isolation, bonding and earthing awareness, bathroom zones and the scope of Part P.
125 questions 4 study notes
Diagnostics & Green Skills
On-the-job judgement and the shift to low-carbon — fault-finding call-outs and renewables awareness.
25 free questions
Level 2Field Diagnostics
What-would-you-do call-outs: no hot water, no heating, leaks and low pressure, routed to safe checks.
120 questions 2 study notes
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Level 2Low-Carbon & Renewables
Awareness of the shift off gas — heat pumps, solar thermal and what the Future Homes Standard means for the trade.
111 questions 11 study notes
Step up to Level 3
Design and diagnosis depth above the Level 2 foundations — heat-loss and sizing calculations, hot water storage, cold water and low-carbon fuels. Premium.
Heating & Hot Water (L3)
Design and size it properly — heat loss, emitter and pump sizing, hot water storage and reheat, commissioning and fault diagnosis.
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Level 3Central Heating (L3)
System design, heat loss and gain, sizing of boiler, emitters, pipework, pump and vessel, commissioning and fault diagnosis.
158 questions 17 study notes
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Level 3Hot Water (L3)
System selection, demand and storage sizing, reheat times, scald protection and fault diagnosis.
135 questions 12 study notes
Cold Water & Fuels (L3)
Loading-unit sizing and Legionella control for cold water, and the fuels and heat sources that drive a system.
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Level 3Cold Water (L3)
Loading-unit sizing, storage and accumulators, the Water Fittings Regulations, Legionella control and commissioning.
137 questions 12 study notes
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Level 3Domestic Fuels (L3)
Fuel types and characteristics, low-carbon heat sources, choosing a fuel, safe storage and the competent-person bodies.
151 questions 12 study notes
Sanitation & Drainage (L3)
Design and prove the waste side: stack ventilation, discharge sizing, pumped systems, soundness tests and fault diagnosis.
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Level 3Sanitation & Drainage (L3)
Sanitary pipework design and ventilation, discharge-pipe and stack sizing, pumped and macerator systems, soundness testing and fault diagnosis.
40 questions 4 study notes
What should I revise for Level 2 plumbing?
Start with safe working, pipework processes and the science behind water and heat. Then apply that knowledge to cold water, hot water, heating and drainage. Match your revision to the unit list your college or assessor has given you: a Level 2 course name alone does not identify every assessment you will take.
- Safety and processes: recognise hazards, explain safe isolation, choose suitable materials and describe how joints and supports work.
- Science and calculations: practise units, volume, flow, pressure, heat and expansion. Use the water head and pressure calculator to check a calculation after working it out.
- Water supplies: trace a direct or stored cold supply and explain hot-water controls. The cylinder diagram helps you connect each component to its job.
- Heating and drainage: follow the water through a heating circuit, explain trap seals and check gradients with the drainage fall calculator.
- Judgement: explain why an answer is safe, what evidence you would check next and when a fault needs escalation.
Turn a plumbing quiz into a revision session
Choose one topic for a short session. Read its note, close it and sketch the system or explain the rule from memory. Answer a few questions, then read each explanation, including the ones you got right by guessing. Write down the reason for each mistake: a missing fact, a wrong unit, a misread diagram or an unsafe next step.
On your next visit, revisit those mistakes before changing topics. Include every unit in your plan; repeatedly scoring well on cold water does not check your drainage knowledge. Start with the free cold-water questions or central-heating questions, then use the module cards above to fill gaps.
Level 2 or Level 3?
Use the Level 2 modules to build your understanding of everyday systems. Our Level 3 modules add design and diagnosis: sizing, heat loss, storage and fuel choices. For example, identifying a radiator valve is different from explaining whether the radiator can meet a room’s heat demand at a lower water temperature. The radiator sizing calculator lets you work through that second question. Your qualification handbook decides which topics and practical assessments your route requires.
Does this cover City & Guilds or NVQ plumbing revision?
These resources support the plumbing theory used across qualification routes. Our modules group subjects by system; they are not awarding-body unit numbers. Use the 6189 qualification guide to plan knowledge and workplace evidence separately. An NVQ can itself be called a Diploma: the Diploma versus NVQ guide explains why the full qualification title matters. Online quiz results do not replace observed practical work or a workplace portfolio.
Free vs Premium
The free practice sets contain 25 questions each in Cold Water Systems, Central Heating and Field Diagnostics. Guides, calculators and the notes marked free are also available without payment. Premium unlocks the full question bank, Premium notes and timed mock assessments. The Free and Premium labels show the access for each resource.
Still choosing a course? Read how to get into plumbing before building your revision plan.