Central Heating systems | Quiz

In a modern sealed central heating system incorporating a condensing boiler, what is the expected temperature difference between the flow and return?

• 12°C

• 20°C

• 22°C

• 30°C

Which pipe within an open vented central heating system allows the system to remain at atmospheric pressure?

• Cold feed and expansion pipe

• Open vent pipe

• Warning pipe

• Discharge pipe

Which heating system incorporates 2x two-port valves?

• The C-plan

• The Y-plan

• The W-plan

• The S-plan

The image shows a three-port mid-position valve. How will the system function in its current position?

• Hot water only

• Heating only

• Heating and hot water

Which of the following shows the best relative positions of the pump, cold feed and open vent to allow for a positive system pressure while minimising pumping over?

• A

• B

• C

Which type of boiler utilises increased efficiency by recovering latent heat from the flue gases?

• Combination boiler

• Traditional boiler

• Condensing boiler

• System boiler

What is the recommended installation height from the floor for a radiator?

• 100mm

• 150mm

• 200mm

• 250mm

Within a sealed heating system, which component accommodates the expansion of water during heating?

• Feed and expansion cistern

• Cold feed and expansion pipe

• Expansion bellows

• Expansion vessel

Which of the following should be provided to a central heating system within a dwelling that has a useable floor space greater than 150m²?

• Independent time-controlled zones

• A gravity hot water circuit

• Modular boiler arrangement

• A low loss header

What component is shown in the image here?

• Underfloor heating manifold

• Expansion relief valve

• Low loss header

• Boiler cascade system