GERTC Civil Engineering (CE) Hydraulics and Principles of Geotechnical Engineering (HPGE) Past Board Practice Exam

In USCS particle-size classification, the boundaries are set by sieve openings: gravel is larger than 4.75 mm, sand ranges from 0.075 mm up to 4.75 mm, silt is between about 0.002 mm and 0.075 mm, and clay is smaller than about 0.002 mm. The given range—larger than the No. 200 sieve opening (0.075 mm) but smaller than the No. 4 sieve opening (4.75 mm)—matches the sand interval exactly. Gravel would be too coarse (above 4.75 mm), while silt and clay would be too fine (below 0.075 mm). So the correct classification is sand.