Unit 206: Outcome 5 Maintenance

Multiple Choice

Which of the following is NOT an indicator that maintenance is needed for a hot water system?

• Temperature settings on thermostat

• Limescale blockages

• Filters cleaned

• Pipe size too large

Multiple Choice

Which maintenance issue is most likely to occur if the feed pipework is damaged or blocked in a manually controlled shower?

• Unbalanced pressure

• Leaks

• Expansion noise

• Water hammer

Multiple Choice

What steps should be taken if an isolation valve is passing water due to a build-up of limescale or a damaged O ring?

• Dismantle valve and inspect parts

• Increase pipe diameter

• Inspect clips and brackets

• Change to an equilibrium valve

Multiple Select

Which of the following are recommended actions to address expansion noise in hot water or central heating pipework?

• Inspect clips/brackets

• Inspect notching

• Increase pipe diameter

• Inspect insulation and padding

Multiple Choice

Which fault can cause the hot water temperature to rise to dangerous levels if not addressed?

• Thermostat failure

• Immersion element failure

• Failure of coil

• Loss of air bubble

Multiple Select

Which of the following are possible indicators of failure of coil in a hot water system?

• F&E overflow dripping

• Hot water discoloured

• Steam in loft area

• MCB tripping

Multiple Choice

Which maintenance action is recommended if water is boiling and dangerously hot when drawn off due to a failed immersion heater thermostat?

• Replace immersion with non self-resetting thermal cut out

• Replace cylinder stat

• Drain the secondary system

• Arrange for a Gas Safe engineer

Multiple Choice

Which of the following is a recommended practice to prevent cold water pipes from warming up due to proximity to hot water pipes?

• Install hot water pipes below cold water pipes

• Insulate only the cold water pipes

• Install hot water pipes above cold water pipes and insulate them

• Do not insulate any pipes

Multiple Select

Which of the following are indicators of blockages in a plumbing system?

• No flow of water

• Restricted water flow

• Stiff valves

• High water pressure

Multiple Choice

What happens to hard water when it is heated above 65°C in a plumbing system?

• It becomes soft water

• It loses its calcium and forms limescale

• It increases water pressure

• It removes all impurities

Multiple Choice

What is a common fault that causes warm water to come out of cold taps, and how can it be prevented?

• A cold pipe touching a hot pipe; install cold pipe below hot pipe

• A hot pipe touching a cold pipe; install cold pipe above hot pipe

• A cold pipe touching a hot pipe; install hot pipe below cold pipe

• A hot pipe touching a cold pipe; install cold pipe below hot pipe

Open Ended

Explain the process by which a water softener prevents scale, scum, and tide marks in plumbing systems.

Multiple Choice

Which of the following methods do NOT soften water but help prevent scale formation?

• Water softener

• Polyphosphate chemicals

• Magnetic scale inhibitors

• Electrical scale inhibitors

Multiple Choice

Which of the following is an indicator that maintenance may be required for a domestic hot water system?

• Temperature settings on thermostat

• High water pressure

• Newly installed pipes

• Noisy radiators

Multiple Choice

What is the main purpose of drinking water filters as described in the image?

• To remove all minerals from water

• To improve the taste by altering water composition

• To make water cold

• To add flavors to water