Hot Water 3

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 guidance for good practice when installing hot and cold pipework in adwelling
• The regulations covering all internal and external hot and cold watersystems for dwellings
• 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?

• Booster pump for a shower
• Indirect hot water cylinder
• Shower mixer valve
• 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
• 4bar for 30mins then 6bar for 15 minutes
• 6 bar for one hour

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 degrees , 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