What is one advantage of installing a system boiler?

• It reduces water usage

• It saves time and space on installation

• It increases energy consumption

• It requires less maintenance

When is a system boiler the preferred choice?

• When a high-pressure system is needed

• When a sealed system is required

• When a low-cost option is desired

• When a portable system is necessary

What is required to prevent back siphonage of central heating water into mains water?

• A single check valve

• A double check valve

• A pressure relief valve

• A flow restrictor

According to the Water Regulations, what must be done after the system is charged to the correct pressure?

• The loop must be left connected

• The loop must be disconnected

• The loop must be tested

• The loop must be replaced

What safety controls do modern combination boilers contain?

• Thermostat and timer

• Expansion vessel and pressure relief valve

• Smoke detector and alarm

• Water filter and purifier

Which component in the diagram is responsible for controlling the temperature?

• Expansion vessel

• Pressure relief valve

• Room thermostat

• Filling loop

What is the primary function of the combination boiler?

• To store hot water

• To provide both heating and hot water

• To circulate cold water

• To control room temperature

Which component is directly connected to the radiators in the system?

• Expansion vessel

• Heating return

• Pressure relief valve

• Time clock

What is the main benefit of a combination boiler in terms of water supply?

• Provides cold water under mains pressure

• Provides instant hot water under mains pressure

• Provides filtered water

• Provides mineral water

What is one limitation of a combination boiler regarding DHW supply?

• It can supply DHW to multiple draw-off points simultaneously.

• It only supplies DHW to one draw-off point at any one time.

• It provides instant DHW at all times.

• It has unlimited DHW supply.