Control of Domestic Hot Water Temperature Quiz

Why is the control of domestic hot water temperature important?

• To prevent scalding accidents

• To save water

• To reduce electricity bills

• To improve water pressure

According to Building Regulations part 'G', what is the maximum temperature that hot water delivered to a bath should not exceed?

• 38°C

• 48°C

• 58°C

• 68°C

What safety feature is now fitted to shower valves to prevent scalding?

• Pressure regulator

• Blending valve

• Safety stop set at 38°C

• Thermometer

According to Building Regulations part 'G', what temperature must stored hot water never be able to reach?

• 90°C

• 95°C

• 100°C

• 105°C

In unvented systems, which of the following is NOT a method to reduce the risk of explosion?

• Boiler stat

• Cylinder stat

• Overheat cut-off device

• Pressure gauge

Which device is used in unvented systems to reduce the risk of explosion by controlling the temperature?

• Boiler stat

• Pressure gauge

• Thermometer

• Flow meter

Which of the following is a method to reduce the risk of explosion in unvented systems by controlling the pressure?

• Cylinder stat

• Expansion vessel/PRV/TPRV

• Overheat cut-off device

• Thermostat

What temperature range allows legionella to grow?

• 10–20°C

• 20–46°C

• 47–60°C

• 60–80°C

At what temperature will legionella be killed off?

• 20°C

• 30°C

• 47°C and above

• 60°C and above

Why is it important to control the temperature of water in plumbing systems?

• To prevent the growth of algae

• To prevent the presence of any water-borne pathogens

• To save energy

• To improve water taste