Fill in the blank: A common type of domestic central heating system is ________ heating.

• Electric

• Gas

• Oil

• Wood

What is the main purpose of the Feed and Expansion (F&E) cistern in an open vented system?

• To cool the water

• To allow heated water to expand and operate at atmospheric pressure

• To filter the water

• To heat the water

The base of the Feed and Expansion (F&E) cistern should be at the same level as the ______.

• hot water tank

• cold water storage cistern

• boiler

• radiator

What is the common capacity and color of the feed and expansion (F&E) cistern?

• 15-litre, white

• 18-litre, black

• 22-litre, blue

• 20-litre, red

The 22mm open vent from the primaries must rise a minimum of ___ above the water level.

• 300mm

• 450mm

• 500mm

• 600mm

What is required before the BS 1212 FOV is installed in the F&E?

• A service valve

• A pressure gauge

• A temperature sensor

• A flow meter

The system water will expand by ___ when heated.

• 2%

• 3%

• 4%

• 5%

What is the primary function of the open vent pipe?

• To provide a safety outlet

• To increase water pressure

• To reduce noise

• To filter water

The open vent pipe should be a minimum of ___ above the water level.

• 300mm

• 450mm

• 600mm

• 750mm

What is the primary function of an air separator?

• To heat the water

• To separate air from water

• To cool the water

• To mix air with water.