Gas Fitter Practice Test

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Natural gas is primarily composed of which two gases?

  1. Methane and Butane

  2. Methane and Ethane

  3. Ethane and Butane

  4. Butane and Propane

The correct answer is: Methane and Ethane

Natural gas is primarily composed of methane (CH₄) and some ethane (C₂H₆). Methane is the principal component, making up about 70-90% of natural gas, while ethane typically accounts for a smaller percentage. This composition is significant because methane is a highly efficient fuel, abundant in natural gas deposits, and has a lower carbon footprint compared to other fossil fuels. While butane and propane are present in some natural gas mixtures, they are more commonly associated with liquefied petroleum gas (LPG) rather than being primary components of natural gas itself. This distinction is important for understanding the properties, uses, and classification of these gases in various applications. The selection of methane and ethane highlights the focus on the primary constituents that define the characteristics and behavior of natural gas as an energy source.

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