Canadian Entry To Practice (CETP) Practice Test

What are the basic building blocks of L.P. Gas?

1. Hydrocarbon

2. Carbohydrate

3. Hydraulic oil

4. Heavy metals

The correct answer is: Hydrocarbon

The basic building blocks of L.P. Gas, or Liquefied Petroleum Gas, are hydrocarbons. Hydrocarbons are organic compounds made up primarily of hydrogen and carbon atoms. L.P. Gas typically consists of a mixture of propane and butane, both of which are hydrocarbons. These compounds are derived from natural gas processing and petroleum refining, emphasizing their core foundational role in the designation of L.P. Gas. The other options do not relate to the composition of L.P. Gas. Carbohydrates, while also organic compounds, contain carbon, hydrogen, and oxygen atoms, and are primarily associated with biological processes, not gas composition. Hydraulic oils are industrial fluids used in machinery and are unrelated to the synthesis or composition of gases like L.P. Gas. Heavy metals, such as lead or mercury, are inorganic elements that do not serve as building blocks for L.P. Gas and have no relevance to its structure or function. Thus, the identification of hydrocarbons as the building blocks of L.P. Gas is entirely accurate in the context of gas composition and properties.