Georgia Septic Installer Practice Test

What type of soil is characterized by the smallest particle size?

1. Sand

2. Sandy loam

3. Silt

4. Clay

The correct answer is: Clay

Clay is characterized by the smallest particle size among the soil types listed. Its fine particles are less than 0.002 millimeters in diameter, which allows it to retain water and nutrients more effectively than coarser soils. This property gives clay a significant role in the context of septic systems, as it can impact drainage and percolation rates. The fine texture of clay can lead to slower absorption of water, meaning that septic systems installed in clay soils may require specific design considerations to ensure proper functioning. Understanding clay's properties, including its water-holding capacity and permeability, is essential for septic system installation and maintenance, as it can significantly influence the performance of the system.