Heavy Equipment Operator Certification Exam Prep · Question
When backfilling an excavated area, what is the main reason for compacting each lift of material?
Proper compaction of backfill in lifts is crucial to prevent long-term settlement, which can lead to structural damage to surfaces above (e.g., roads, foundatio
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Question: When backfilling an excavated area, what is the main reason for compacting each lift of material?
Answer options:
- A. To reduce the total volume of backfill required. ✅ B. To prevent future settlement, maintain structural integrity, and ensure proper drainage.
- C. To make it easier for future excavations in the same area.
- D. To bond the new backfill material with the original undisturbed soil.
Correct answer: B. To prevent future settlement, maintain structural integrity, and ensure proper drainage.
Explanation: Proper compaction of backfill in lifts is crucial to prevent long-term settlement, which can lead to structural damage to surfaces above (e.g., roads, foundations) or improper drainage. It restores the load-bearing capacity of the excavated area.
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