G2 Gas Fitter Practice Exam

The relative density of liquid propane is approximately what value?

1. 0.2

2. 0.5

3. 0.8

4. 1.0

The correct answer is: 0.5

The relative density of liquid propane is approximately 0.5. Relative density, also known as specific gravity, is a measure that compares the density of a substance to the density of water. Since water has a relative density of 1.0, a relative density of 0.5 indicates that liquid propane is about half as dense as water. This value is significant in various applications, including gas fitting, as it helps professionals understand how propane behaves in various conditions. For example, because the relative density is less than 1, liquid propane will float on water. This information is crucial for safety and engineering considerations, especially in leak scenarios where propane may come into contact with water. Additionally, understanding the relative density helps in calculating the volume and mass of propane in different situations, assisting professionals in ensuring safety and efficiency in gas systems. Knowing that propane is less dense than water can also impact decisions regarding storage and handling of this substance.