Heating Systems Quiz

What is the purpose of a pressure relief valve in a sealed system?

• To control the temperature of the heating system

• To regulate the flow of hot water

• To prevent over-pressurisation of the system

• To increase the pressure in the expansion vessel

What is the main advantage of a combination boiler?

• Provides instant hot water under mains pressure

• Operates without the need for a pressure relief valve

• Can supply hot water to multiple draw-off points simultaneously

• Requires minimal maintenance

What is the purpose of a double check valve in a sealed system?

• To control the temperature of the heating system

• To increase the pressure in the expansion vessel

• To regulate the flow of cold water

• To prevent back siphonage of central heating water into mains water

What is the minimum temperature required at the manifold for underfloor heating?

• 75ºC

• 55ºC

• 40ºC

• 65ºC

What is the purpose of a warm air unit in a warm air heating system?

• Prevents over-pressurisation of the system

• Controls the temperature of the heating system

• Regulates the flow of hot water

• Delivers warmed air into various rooms

What is the main advantage of district heating?

• Provides heat to multiple buildings using a centralised boiler

• Increases installation and operating costs

• Limits flexibility in multiple site options

• Requires individual boilers for each building

What is the main advantage of electric storage heaters?

• Provide instant hot water under mains pressure

• Operate without the need for insulation

• Require frequent maintenance

• Charge up at night when electrical energy is available at low cost

What is the purpose of a filling loop in a sealed system?

• Prevents over-pressurisation of the system

• Controls the temperature of the heating system

• Regulates the flow of hot water

• Allows the system to be filled under mains pressure

What is the purpose of a special mixing valve in underfloor heating?

• Prevents back siphonage of central heating water into mains water

• Regulates the water temperature to ensure the floor does not reach too high a temperature

• Increases the pressure in the expansion vessel

• Controls the temperature of the heating system

What is the main limitation of a combination boiler?

• Only supplies hot water to one draw-off point at any one time

• Operates without the need for a pressure relief valve

• Requires frequent maintenance

• Provides instant hot water to multiple draw-off points simultaneously