Gas Fitter Practice Test

Which gas is commonly used in domestic heating systems?

1. Methane

2. Hydrogen

3. Butane

4. Propane

The correct answer is: Methane

Methane is the most widely used gas in domestic heating systems primarily due to its availability, efficiency, and cost-effectiveness. It is the primary component of natural gas, which is distributed through pipelines to homes for heating, cooking, and hot water. Methane combustion is efficient, producing a high amount of heat with relatively low emissions when compared to other fuels. Additionally, the infrastructure for delivering methane to residential areas is well-established, making it the preferred choice for many households. Other gases like butane and propane are also used for heating, particularly in areas without natural gas pipelines, but methane is by far the most common for domestic heating systems in urban and suburban settings. Hydrogen, while being a cleaner alternative that is gaining traction, is not yet commonly used in residential heating systems and is more prevalent in discussions about future energy solutions.