Georgia Residential Contractor Practice Exam

What is the required diameter range for aggregate used in gravel systems?

1. 1/4 - 1 inch

2. 1/2 - 2 inches

3. 3/4 - 3 inches

4. 2 - 4 inches

The correct answer is: 1/2 - 2 inches

In gravel systems, the required diameter range for aggregate typically falls within the range of 1/2 inch to 2 inches. This size range is important because it ensures proper drainage and stability in various applications, such as construction and landscaping. Aggregates within this range can effectively prevent compaction, allowing water to flow through the system while still providing adequate support for structures above. Gravel of this diameter serves a dual purpose: it facilitates water drainage, reducing the potential for erosion or pooling, and provides a stable base material that can bear loads without shifting excessively. Using aggregates that are too small might lead to excessive compaction, which could inhibit drainage, while aggregates that are too large may compromise the stability of the system. This understanding underscores the necessity of selecting the appropriate size of aggregate for gravel systems, ensuring they perform effectively in both drainage and structural support roles.