NASCLA General Contractor Exam 2025 – 400 Free Practice Questions to Pass the Exam

The proctor test is specifically designed to determine the maximum density of soil when it is compacted at various moisture contents. This test is crucial in geotechnical engineering and construction because it helps in understanding how much the soil can be compacted and the optimal moisture content for achieving that maximum density.

By conducting the proctor test, engineers can establish the relationships between moisture content and dry density of the soil, which is essential for ensuring that soil compaction meets the requirements for construction projects. Achieving maximum density is vital for providing adequate support to structures, preventing settlement, and enhancing overall stability.

While the other options touch on important soil characteristics, they do not relate directly to the proctor test. For instance, soil pH level relates to soil chemistry, permeability rate deals with how water moves through soil, and compaction level is a general term that may refer to the outcome of a proctor test but does not specify the test’s objective of determining maximum density at optimal moisture content.