Central heating power point 2 2025

Where is the feed and expansion cistern commonly located in a system?

• In the loft at the highest point of the system.

• In the basement at the lowest point of the system.

• Next to the boiler.

• Outside the building.

At what level should the base of the F&E cistern be placed?

• At the same level as the cold-water storage cistern.

• Above the cold-water storage cistern.

• Below the cold-water storage cistern.

• At any level, it does not matter.

What is the common capacity of the F&E cistern?

• 10 litres

• 18 litres

• 25 litres

• 30 litres

What is the minimum rise required for the 22mm open vent from the primaries above the water level?

• 300mm

• 450mm

• 600mm

• 750mm

By what percentage will the system water expand when heated?

• 2%

• 4%

• 6%

• 8%

What is the primary function of the open vent pipe?

• To increase water pressure

• To provide a safety outlet and allow operation at atmospheric pressure

• To heat the water

• To filter impurities

What is the minimum height the vent needs to be above the water level?

• 300mm

• 450mm

• 600mm

• 150mm

What is the minimum pipe size for the open vent pipe?

• 15mm

• 22mm

• 30mm

• 10mm

What is the primary function of an air separator in pipework systems?

• To allow close proximity of cold feed and vent pipes.

• To increase water pressure in the system.

• To heat the water in the pipes.

• To reduce the noise in the system.

What does an air separator help to reduce in a system?

• System noise

• System temperature

• System pressure

• System size