Hot Water Systems Quiz L3P2U6,1.8;1

What is the purpose of safety controls in unvented hot water storage systems?

• To control the temperature of the water

• To prevent the water from boiling

• To reduce the pressure in the system

• To increase the boiling point of water

What is the function of the Tier 1 control thermostat in an unvented hot water storage system?

• To shut off the heat when it reaches a certain temperature

• To shut off the heat in the event of control thermostat failure

• To discharge hot water through the temperature relief valve

• To prevent particles from entering the pipework

What is the purpose of the Energy Cut-Out (ECO) or high limit thermostat in an unvented hot water storage system?

• To control the temperature of the stored water

• To shut off the heat in the event of control thermostat failure

• To discharge hot water through the temperature relief valve

• To prevent particles from entering the pipework

Which component in an unvented hot water storage system acts as a pressure relief valve in the event of pressure relief valve failure?

• Temperature & Pressure relief valve

• Energy Cut-Out (ECO)

• Control thermostat

• Expansion vessel

What is the function of the pressure reducing valve or composite valve in an unvented hot water storage system?

• To shut off the water supply for maintenance

• To prevent particles from entering the pipework

• To discharge water from the system at a pre-determined pressure

• To maintain a constant operating pressure within the system

Which component in an unvented hot water storage system removes small particles from the water?

• Line strainer

• Expansion vessel

• Single check valve

• Isolating valve

What is the purpose of the isolating valve in an unvented hot water storage system?

• To maintain a constant operating pressure within the system

• To prevent particles from entering the pipework

• To shut off the water supply for maintenance

• To discharge water from the system at a pre-determined pressure

What is the purpose of the temperature relief valve in an unvented hot water storage system?

• To shut off the heat when it reaches a certain temperature

• To shut off the heat in the event of control thermostat failure

• To prevent particles from entering the pipework

• To discharge hot water through the temperature relief valve

What is the purpose of the expansion vessel in an unvented hot water storage system?

• To shut off the water supply for maintenance

• To accommodate the expansion of the stored water when heated

• To discharge water from the system at a pre-determined pressure

• To prevent particles from entering the pipework

What is the purpose of the tundish in an unvented hot water storage system?

• To provide a relief opening in the event of a discharge pipe blockage

• To discharge water from the system at a pre-determined pressure

• To prevent particles from entering the pipework

• To shut off the water supply for maintenance