Question 61 TV02 - Towing Vessels - Great Lakes and Inland

The Correct Answer is D ### Explanation of Option D (Correct) Combustible liquids are typically classified based on their flash points, which is the lowest temperature at which the liquid gives off enough vapor to form an ignitable mixture in the air near its surface. **Grade E combustible liquids** are defined as those having a relatively high flash point, which corresponds to the highest safety class for commonly graded combustible fuels and oils. According to many standard fire codes (often aligning with the classification for Class III combustible liquids), Grade E liquids have a flash point of **150°F or greater**. Examples often include heavy oils or certain lubricating oils. ### Explanation of Other Options (Incorrect) **A) greater than 115°F and less than 150°F:** This range typically defines **Grade D combustible liquids** (or Class II liquids). These are combustible, but their flash point is lower than that of Grade E liquids. **B) 80°F or less:** Liquids with flash points this low are classified as highly **flammable liquids** (often Grade B, or Class I liquids) because they vaporize easily at or below room temperature, presenting a significant fire hazard. **C) greater than 80°F and less than 115°F:** This range generally falls within the categories of **flammable liquids** (Class IC, if the upper limit is slightly adjusted to the common 100°F threshold for combustibility) or the very low end of combustible liquids. This range is significantly below the threshold required for the Grade E classification.