domestic fuels systems

What is the colour for a cylinder containing propane gas?

• Blue

• Grey

• Red

• Green

Answer explanation

The correct color for a cylinder containing propane gas is red. This color coding helps in identifying the type of gas contained within the cylinder for safety and handling purposes.

Which of the following fuels is not a sustainable low carbon fuel?

• Solar thermal

• Heat pumps

• Kerosene

• Combined heat and power

Answer explanation

Kerosene is a fossil fuel that emits high levels of carbon when burned, making it unsustainable. In contrast, solar thermal, heat pumps, and combined heat and power are low carbon and sustainable energy sources.

The specific gravity of natural gas is…

• 1.2–1.5

• 0.6–0.8

• 2.0–2.1

• 0.9–1.1

Answer explanation

The specific gravity of natural gas typically ranges from 0.6 to 0.8, making the correct choice 0.6–0.8. This range indicates that natural gas is lighter than air, which is important for its behavior in the atmosphere.

The kerosene used in oil boilers in the UK is also known as…

• C2 grade 28 second viscosity oil

• C3 grade 15 second viscosity oil

• D3 grade 20 second viscosity oil

• D5 grade 5 second viscosity oil

Answer explanation

The kerosene used in UK oil boilers is classified as C2 grade 28 second viscosity oil, which indicates its specific viscosity and suitability for heating applications.

What is used in a modern oil boiler to atomise kerosene oil?

• Burner plate

• Injector burner

• Pressure jet burner

• Compressor burner

Answer explanation

A pressure jet burner is used in modern oil boilers to atomise kerosene oil effectively. It creates a fine mist of fuel, ensuring efficient combustion and optimal heating performance.

Which fuel is not classified as a solid fuel?

• Coal

• Peat

• Kerosene

• Coke

Answer explanation

Kerosene is a liquid fuel, while coal, peat, and coke are all classified as solid fuels. Therefore, kerosene is the correct answer as it does not belong to the solid fuel category.

With regard to coal, what content needs to be high to give off more energy?

• Carbon

• Hydrogen

• Sulphur

• Oxygen

Answer explanation

Coal with high carbon content produces more energy when burned, as carbon is the primary fuel component. In contrast, high levels of hydrogen, sulfur, or oxygen do not contribute as effectively to energy output.

Which one of the following fuels is a sustainable low carbon fuel?

• Coal

• Kerosene

• Natural gas

• Biomass

Answer explanation

Biomass is considered a sustainable low carbon fuel because it is derived from organic materials and can be replenished, unlike fossil fuels like coal, kerosene, and natural gas, which release significant carbon emissions.

Which Building Regulation covers combustion appliances?

• Part H

• Part J

• Part P

• Part L

Answer explanation

Part J of the Building Regulations specifically addresses the requirements for combustion appliances, including their installation and safety measures, making it the correct choice for this question.

Which is the regulative body for oil fired systems?

• Gas Safe

• HETAS

• OFTEC

• IET

Answer explanation

OFTEC is the regulatory body specifically for oil-fired heating systems, ensuring safety and compliance. Gas Safe covers gas systems, HETAS focuses on solid fuels, and IET pertains to electrical installations.