What does the soil sample roll test measure?

Maximize your readiness for the CDC 3E551 Engineering Journeyman Exam. Use flashcards and multiple choice questions, complete with hints and explanations. Start your journey to success today!

Multiple Choice

What does the soil sample roll test measure?

Explanation:
The soil sample roll test is a quick way to judge how plastic a soil is. It checks whether the soil can be rolled into a continuous thread between the fingers without crumbling. If you can form a smooth thread about 3 mm in diameter, the soil shows plastic behavior typical of clays with higher plasticity. If it crumbles or won’t form a thread, the soil is less plastic or non-plastic. This makes the test a direct measure of plasticity, not moisture content, liquid limit, or grain size distribution.

The soil sample roll test is a quick way to judge how plastic a soil is. It checks whether the soil can be rolled into a continuous thread between the fingers without crumbling. If you can form a smooth thread about 3 mm in diameter, the soil shows plastic behavior typical of clays with higher plasticity. If it crumbles or won’t form a thread, the soil is less plastic or non-plastic. This makes the test a direct measure of plasticity, not moisture content, liquid limit, or grain size distribution.

More practice questions