What is considered a combustible liquid?

• A. Gasoline
• B. Diesel
• C. Alcohol
• D. Kerosene

Answer: (B)

A combustible liquid is defined as a liquid that has a flash point at or above 100°F (37.8°C). Gasoline, diesel, alcohol, and kerosene all fall within different classifications based on their flash points.

Diesel fuel is indeed considered a combustible liquid because it has a flash point above 100°F, making it safe to handle and store under certain conditions compared to more volatile liquids. This characteristic allows diesel to be used widely in transportation and machinery applications.

In contrast, gasoline has a flash point below 100°F, which classifies it as a flammable liquid rather than a combustible one. Alcohol can vary in classification depending on its concentration but generally is also considered flammable. Kerosene, similar to diesel, has a higher flash point and would be classified as a combustible liquid as well, but the question specifically asks for one that is considered combustible within the context provided, so diesel is the clear choice.

Each of these liquids has different handling, storage, and safety implications based on their classification, which is crucial for pipeline construction and inspection practices.