Which symbol indicates a liquid limit below 50?

• A. H
• B. CL
• C. L
• D. MH

Answer: (C)

The symbol that indicates a liquid limit below 50 is "L." In the context of soil classification, particularly in the Unified Soil Classification System (USCS), "L" stands for "low liquid limit," which designates soils that have a liquid limit of less than 50. This classification helps in identifying the plasticity and behavior of fine-grained soils, which is essential for understanding their engineering properties and behavior under different moisture conditions.

Soils with a liquid limit below 50 are typically more stable in terms of their behavior under loads and less susceptible to changes in moisture content compared to those with higher liquid limits. This classification is important in materials testing and can influence decisions related to construction, earthworks, and the suitability of soils for various engineering applications.