Phase 1 9189 Central Heating PP3 Quiz

What type of heating system is mentioned that involves heating from below the floor?

• Underfloor heating

• Overhead heating

• Central heating

• External heating

What is commonly included in a system boiler nowadays?

• Circulator only

• Automatic bypass only

• Expansion vessel only

• Circulator, automatic bypass, and an expansion vessel

What is the purpose of a sealed expansion vessel in a sealed system?

• To increase the pressure within the system

• To replace the feed and expansion cistern of the open system

• To store extra water for the system

• To monitor the temperature of the system

What does a filling connection in a sealed system allow?

• It allows the system to release excess water

• It allows the system to be heated more quickly

• It allows a point at which the system can be filled under mains pressure

• It allows the system to operate without electricity

Why is a pressure relief valve installed in a sealed system?

• To increase the efficiency of the system

• To prevent the system from using too much energy

• To prevent the over-pressurisation of the system if the expansion vessel fails

• To filter the water entering the system

What needs to be installed to prevent the back siphonage of central heating water into mains water?

• A single check valve

• A double check valve

• A pressure relief valve

• A control valve

What must be fitted on both of the filling loop connections in a sealed system?

• A pressure gauge

• A control switch

• A means of isolation

• A temperature sensor

According to the Water Regulations, what should be done to the loop after the system has been charged to the correct pressure?

• It should be left connected

• It should be monitored

• It should be disconnected

• It should be replaced

What does the gauge in the image most likely measure?

• Water level

• Water pressure

• Water temperature

• Electrical current

What is a combi boiler used for in the UK?

• Cooking and cleaning

• Providing central heating and instantaneous hot water

• Outdoor heating

• Refrigeration