MCC-NH Gas Fitters Practice Exam

What is the approximate specific gravity of LP gas?

1. 0.75 Specific Gravity

2. 1.00 Specific Gravity

3. 0.60 Specific Gravity

4. 1.75 Specific Gravity

The correct answer is: 0.60 Specific Gravity

When considering the specific gravity of LP (liquefied petroleum) gas, it is important to understand that specific gravity is a measure of the density of a substance compared to the density of water. For gases, a specific gravity less than 1.00 indicates that the gas is lighter than air, while a specific gravity greater than 1.00 indicates that the gas is heavier than air. LP gas, which primarily includes propane and butane, typically has a specific gravity around 0.60 to 0.65. This means it is indeed lighter than air, which is crucial for safety and ventilation considerations when using LP gas in various applications. The value of 0.60 specific gravity aligns with the known characteristics of LP gas, making it the most accurate choice among the options provided. The other specific gravity values listed do not accurately represent LP gas. A specific gravity of 0.75 would still imply the gas is lighter than air but is less precise for LP gas in particular. A specific gravity of 1.00 would indicate a gas that is the same density as air, which does not apply to LP gas. A specific gravity of 1.75 would suggest a gas much heavier than air, which is