Georgia Residential Contractor Practice Exam

How does polystyrene aggregate enhance absorption trench systems?

1. By increasing overall weight

2. By facilitating better drainage

3. By providing insulation

4. By reducing costs

The correct answer is: By facilitating better drainage

Polystyrene aggregate enhances absorption trench systems primarily by facilitating better drainage. This material has a low density and is often used in construction applications to create lightweight, effective drainage solutions. Its structure allows water to flow through more efficiently, improving the functionality of the absorption trench by ensuring that excess water is effectively managed and diverted. This attribute not only aids in preventing water accumulation but also supports the trench's goal of managing runoff and promoting groundwater recharge. By improving drainage capabilities, polystyrene aggregate helps maintain optimal moisture levels in the surrounding soil, promoting a healthier landscape and reducing the risks associated with flooding or waterlogged conditions. While insulation, weight, and cost considerations are important in many construction applications, they are not the primary benefits related to the use of polystyrene aggregate in absorption trench systems.