Which of the following statements is correct with respect to compaction and consolidation?
1. Compaction releases pore water, whereas consolidation releases pore air.
2. Compaction is valid for cohesive soils, whereas consolidation is applicable for all
types of soils.
3. Both compaction and consolidation degrade the engineering properties of soil.
4. Both compaction and consolidation improve the engineering properties of soil. (Ans)