Hot water supply systems and the associated safety features

What is the purpose of a sacrificial anode in a hot water cylinder?

• To cool down the water

• To act as a safety discharge point

• To protect the steel lining of the cylinder

• To filter the water

Why is an open-vented system considered very safe if installed correctly?

• Because it uses cold water

• Because it is under atmospheric pressure

• Because it has a filter

• Because it is very cheap

By how much does a typical heated hot water system expand?

• 2%

• 4%

• 6%

• 8%

At what temperature does the temperature relief valve begin to discharge?

• 70-75°C

• 80-85°C

• 90-95°C

• 100-105°C

What is the purpose of the temperature relief valve in a cylinder?

• To increase the temperature

• To discharge water when the temperature is too high

• To decrease the pressure

• To add more water to the cylinder

The temperature relief valve is the third tier of safety in the event of what failures?

• Cylinder thermostat and energy cut-off failure

• Pressure gauge and water pump failure

• Water heater and pipe failure

• Thermometer and valve failure

What is the primary function of a line strainer in plumbing?

• To increase water pressure

• To prevent particles from entering and damaging the pipework

• To heat the water

• To reduce water flow

What can happen if a line strainer becomes blocked with debris?

• It can increase the water temperature

• It can cause the pipe to burst

• It can affect the flow rate of the system

• It can change the color of the water

What does the pressure reducing valve control?

• The temperature of the system

• The working pressure of the system

• The flow rate of the system

• The electrical current of the system

Where is the pressure identified on the pressure control valve?

• On the system

• On the component

• On the manual

• On the pipe