NICET - Highway Construction Inspection Practice Exam

Why is it crucial to maintain a trench width consistent with specifications?

1. Wider trenches improve drainage

2. Larger trench widths increase cost

3. Wider trenches reduce construction time

4. Narrower trenches are harder to work in

The correct answer is: Larger trench widths increase cost

Maintaining a trench width consistent with specifications is crucial primarily to control project costs. If trenches are wider than necessary, it can lead to increased material usage, such as more backfill or additional structural support, which drives up the overall project cost. Additionally, wider trenches may require more extensive excavation work, which not only increases labor and equipment costs but may also extend the project timeline due to the extra effort involved in preparing the site. Proper trench width is designed to balance the needs of stability, safety, and efficiency. Adhering to the specified width ensures that resources are used efficiently, which is essential for keeping the project within budget. It also helps prevent issues that can arise from poorly-executed excavation, including potential safety hazards or structural integrity concerns.