Water Temperature Control in Unvented Hot Water Storage Vessels

What is the function of the temperature relief valve in the cylinder?

• To increase the water pressure

• To decrease the water pressure

• To discharge water when the temperature is too high

• To maintain the water temperature

What is the significance of the temperature range 90-95ºC in the context of the cylinder?

• It is the boiling point of water

• It is the temperature at which the relief valve discharges

• It is the optimal temperature for storage

• It is the freezing point of water

What is the relationship between water pressure and boiling point in an unvented hot water storage vessel?

• Inverse relationship

• No relationship

• Direct relationship

• Random relationship

What is the primary reason for the temperature relief valve to discharge?

• High water pressure

• High water temperature

• Low water pressure

• Low water temperature

According to the Building Regulations Approved Document G3, what must unvented hot water storage systems have?

• A single safety component

• A two-tier level of safety

• A three-tier level of safety

• No safety requirements

What is the temperature range for the control stat on an unvented cylinder?

• 50–55ºC

• 60–65ºC

• 70–75ºC

• 80–85ºC

What is the role of the motorised valve in the plumbing system?

• To control the flow of hot water

• To reduce water pressure

• To prevent backflow

• To discharge excess water

Which component is used to control the temperature of the water in the system?

• Control thermostat

• Temp relief valve

• Single check valve

• Motorised valve

What does the engaged signal from the micro switches do?

• Turns the boiler off

• Turns the boiler on

• Turns the pump off

• Turns the pump on

What is the purpose of the plastic shroud in the plumbing system?

• To protect the temperature and pressure relief valve

• To filter water

• To mix hot and cold water

• To control water flow