Question

If a soil has a plasticity index value of 10%, then the soil is classified as:

• A. Non Plastic
• B. Low Plastic
• C. Medium Plastic
• D. Highly Plastic

Hint:

For soil classification, always check $PI$ ranges:
- $PI < 7\%$: Non-plastic,
- $7\% \leq PI \leq 15\%$: Medium plasticity,
- $PI > 15\%$: High plasticity.

Answer 1

The Correct Option is C

Soil plasticity is categorized by its plasticity index ($PI$) according to these ranges:
Non-plastic or very low: $PI < 7\%$.
Medium: $7\% \leq PI \leq 15\%$.
High: $15\% < PI \leq 30\%$.
Very high: $PI > 30\%$.
Given a plasticity index of $10\%$, the soil is classified as medium plastic, falling within the $7\% \leq PI \leq 15\%$ range.