The difference between the liquid and plastic limits of a soil is _______.
A)that one is a moisture variable while the other is a density variable
B)that one is applicable to natural soils the other to artificial growth media
C)greater than the difference between the solid and liquid limits
D)the plasticity index
E)none of the above

Question

Quizplus · Accepted Answer

The plastic limit (PL) and liquid limit (LL) are both measures of a soil's ability to be molded or deformed without breaking. The difference between the two is known as the plasticity index (PI). The plastic limit is the water content at which a soil will begin to crumble when rolled into a filament, while the liquid limit is the water content at which a soil will begin to flow like a liquid when a groove of a specific size is made in it. Therefore, the difference between the liquid and plastic limits of a soil is the plasticity index.

The Difference Between the Liquid and Plastic Limits of a Soil