Central Heating Systems part 1

What is the main purpose of the Feed and Expansion (F&E) cistern in a central heating system?

• To separate air from the system

• To provide hot water for domestic use

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

• To control the speed of the circulator

What is the minimum height requirement for the open vent pipe in a central heating system?

• 450mm above the water level

• 200mm above the water level

• 1 metre above the water level

• 300mm above the water level

What is the function of an air separator in a central heating system?

• To separate air from the system

• To control the speed of the circulator

• To provide hot water for domestic use

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

What is the purpose of an H frame in a central heating system?

• To control the speed of the circulator

• To separate air from the system

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

• To ensure the neutral point of the system is at the base of the cold feed

What is the golden rule for the positioning of the circulator in a central heating system?

• The circulator must always draw on the hot water supply

• The circulator must always draw on the expansion cistern

• The circulator must always draw on the vent pipe

• The circulator must always draw on the cold feed

What is the purpose of the float operated valve (FOV) in a central heating system?

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

• To set the water level in the cistern.

• To control the speed of the circulator

• To separate air from the system

What is the function of the open vent pipe in a central heating system?

• To control the speed of the circulator

• To provide a safety outlet if the system overheats and to allow air to escape from the system

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

• To separate air from the system

What is the minimum pipe size requirement for the open vent pipe in a central heating system?

• 20mm

• 18mm

• 15mm

• 22mm

What is the purpose of the circulator in a central heating system?

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

• To control the speed of the circulator

• To separate air from the system

• To produce positive pressure in the system and avoid air entering the system

What is the correct layout of pipework and removal of air from the system intended to achieve in a central heating system?

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

• To provide hot water for domestic use

• To control the speed of the circulator

• To reduce the noise in the system and lower the risk of corrosion