Red Seal Gasfitter — Class A Practice Exam

What type of gas is commonly utilized for residential heating systems?

1. Propane

2. Natural gas

3. Butane

4. Methane

The correct answer is: Natural gas

Natural gas is commonly used for residential heating systems primarily due to its availability and efficient combustion properties. It is delivered through a network of pipelines, making it easily accessible for most urban and suburban areas. Natural gas systems are designed to operate at lower costs compared to other fuel options, and they emit fewer pollutants, contributing to a cleaner environment. While propane, butane, and methane have their uses, they are not as prevalent for residential heating. Propane is typically used in areas where natural gas is not available and is often stored in tanks. Butane primarily serves applications such as lighter fuel or portable heating, and methane is the main component of natural gas, but it is not used in isolation for residential heating systems. The integrated infrastructure and cost-effectiveness of natural gas make it the preferred choice for residential heating applications.