Compaction MCQ with answer and solution

Concept

Kneading Compaction of Cohesive Soils

Formula

No, there is no mathematical formula for kneading-type compaction; it is a qualitative concept based on soil mechanics and soil classification.

Step-by-step solution

1. Identify that kneading-type compaction (like sheep-foot rollers) is most effective for cohesive, fine-grained soils. 2. Check the given options for cohesive soil: CH represents highly plastic clay (cohesive soil), while SP, SW, and GW are cohesionless gravel/sand. 3. Select Option C (CH).

Explanation

Kneading type compaction works by manipulating and pressing soil particles together, which is most effective for cohesive, fine-grained soils like highly plastic clay (CH).

Shortcut

Remember: "You KNEAD CLAY to make pottery." Kneading compaction is best for Clay/Cohesive soils (CH).

Common mistake

Students often confuse kneading compaction with vibratory methods and mistakenly choose coarse-grained, cohesionless soils like GW or SW instead of cohesive clay (CH).