Progression hot water revision 1

Which one of the following pieces of information will be provided by the installation plan?

• The dwelling position on the estate

• The expected completion date

• The order in which work should take place

• The position of the hot water pipes and valves in a dwelling

The water supply (water fittings) regulations 1999 lay down:

• The regulations covering all internal and external hot and cold water systems for dwellings

• The guidance for good practice when installing hot and cold pipework in a dwelling

• The regulations that cover hot water systems only

• The guidance for internal hot and cold water systems only within a dwelling

Which one of the following hot water components should be fixed using flexible connections?

• Indirect hot water cylinder

• Shower mixer valve

• Booster pump for a shower

• External bib tap

A rigid pipework hot water system has a working pressure of 4bar. At what pressure should the pipework be tested for soundness?

• 1bar for 60 minutes

• 1½ times the working pressure for 15 minutes

• 6bar for one hour

• 4bar for 30mins then 6bar for 15 minutes

To prevent electrolytic corrosion taking place in a system, where can the magnesium rod be placed?

• The cold water storage cistern

• The hot water cylinder

• The circulator

• The open vent

Guidance on the installation procedures for domestic hot water systems can be found in:

• Domestic Water Act 2007

• Specification of work

• BS6700

• Local Authority Regulations

In a customer's property, the CWSC supplies both the hot and cold water systems. The minimum size of this cistern is:

• Equal to 48 hours' worth of water

• 230 litres

• 100 litres

• Twice the size of the domestic hot water cylinder.

Which of the following appliances is most likely to offer the customer low pressure at a hot water outlet?

• Combination boiler

• Direct cylinder

• Combination unit

• Indirect cylinder.

What is this item?

• Pressure/temperature relief valve

• Double check valve

• Stop valve

• Blending valve.

If hard water is allowed to be heated above 65°C, what could be the consequence in the system?

• Legionella could grow

• The blending valve would fail to work

• The pressure relief valve would open

• The efficiency could be affected by limescale.