phase 2 mock heating exam

Which one of the following Building Regulations discusses the control of heating systems within new-build dwellings?

• a) Part L1a

• b) Part L1b

• c) Part L2a

• d) Part L2b

Answer explanation

Part L1a of the Building Regulations specifically addresses the conservation of fuel and power in new dwellings, including the control of heating systems, making it the correct choice.

Which one of the following describes the purpose of background heating?

• a) Heat the property quicker than full central heating

• b) Heat only certain rooms in the property, as required

• c) Heat the property to a lower temperature than full central heating

• d) Heat the property to a higher temperature than full central heating

Answer explanation

Background heating is designed to maintain a comfortable environment at a lower temperature than full central heating, making option c) the correct choice.

Identify the type of heating system shown in the image below.

• a) Open vented S-plan system

• b) Sealed S-plan system

• c) Open vented Y-plan system

• d) Sealed Y-plan system

Answer explanation

The open vented S-plan system uses a feed and expansion tank, allowing for gravity-fed water flow. This system is characterized by separate circuits for heating and hot water, making option a) the correct choice.

An automatic bypass valve is activated by which of the following?

• Boiler shutting off

• Programmer being switched on

• Pressure created within the system

• Pressure of the incoming water service

Answer explanation

The automatic bypass valve is activated by the pressure created within the system. This pressure ensures that the valve opens to maintain proper flow and prevent damage, making it the correct choice.

The main reason a radiator should be installed 150mm above floor level is to…

• Reduce the risk of fire

• Allow the heat to circulate

• Protect the flooring from possible leaks

• Allow easier access for maintenance work

Answer explanation

The main reason a radiator should be installed 150mm above floor level is to allow the heat to circulate effectively. This height helps warm air rise and promotes better heat distribution throughout the room.

A thermostatic radiator valve opens and closes as a result of the temperature of the…

• Primary circuit

• Boiler

• Space it’s installed in

• Return pipework

Answer explanation

A thermostatic radiator valve responds to the temperature of the space it’s installed in, adjusting the flow of hot water to maintain a comfortable environment. This ensures efficient heating based on room temperature.

A pump should be positioned so that the heating system is operating under…

• No pressure

• Positive pressure

• Negative pressure

• Both positive and negative pressures

Answer explanation

A pump should be positioned to maintain positive pressure in a heating system. This ensures proper circulation of the heating fluid and prevents air from entering the system, which can lead to inefficiency and damage.

An automatic air vent should be positioned at the…

• Highest part of the system

• Lowest point of the system

• Point where the vent enters the system

• Point where the cold feed enters the system

Answer explanation

An automatic air vent should be positioned at the highest part of the system to effectively release trapped air, preventing air locks and ensuring optimal system performance.

Which one of the following central heating systems uses a manifold?

• One-pipe system

• Two-pipe system

• Microbore system

• Gravity pipe system

Answer explanation

The microbore system uses a manifold to distribute water to multiple heating circuits efficiently, allowing for smaller pipes and better control of heating zones, unlike the other systems listed.

Installing an air separator allows which one of the following to take place?

• Close coupling of the cold feed and vent connections

• Close coupling of the flow and return connections

• Close coupling of the pump and the vent connections

• Close coupling of the motorised valve connections

Answer explanation

Installing an air separator facilitates the close coupling of the cold feed and vent connections, allowing for efficient air removal and improved system performance.