306 hot water systems 1 Quiz

Between what temperatures does the bacteria Legionella multiply?

• 15–35°C

• 20–25°C

• 20–45°C

• 25–35°C

Identify the item shown here.

• Cylinder thermostat

• Boiler thermostat

• Immersion heater thermostat

• Room thermostat

At what temperature should the hot water in a hot water cylinder be stored at?

• 40°C

• 50°C

• 60°C

• 70°C

According to the Water Supply (Water Fittings) Regulations, at less than what temperature should the hot water in a domestic property not be distributed?

• 55°C

• 65°C

• 45°C

• 35°C

The HSE state in their guidance about 'the control of Legionella bacteria in water systems' that the return temperature on a secondary return system should not be less than…

• 70°C

• 60°C

• 50°C

• 40°C

What is the approximate temperature range for instantaneous water heaters?

• 15–35°C

• 20–45°C

• 35–55°C

• 45–65°C

Identify the item shown here.

• Flow reducing valve

• Pressure regulating valve

• Thermostatic mixer valve

• Thermostatic regulating valve

In a newbuild domestic property, where must the item in Question 7 be installed?

• Prior to every hot water outlet

• Prior to the hot water cylinder

• Prior to a bath

• Prior to a shower

How is the temperature of the hot water produced by a combination boiler varied?

• Altering the pressure of the water

• Higher or lower gas rates

• Controlled via a mixer valve

• Changing the flow rate of the water

Which Approved Document covers hot water installation temperatures?

• Part L

• Part H

• Part G

• Part P