Question

Unified soil classification system (USCS) was developed by ____________

(a) Kozney

(b) Atterberg

(c) Casagrande

(d) Rankine

This question was addressed to me in a national level competition.

My doubt stems from Unified Soil Classification topic in portion Classification of Soils of Geotechnical Engineering I

Answer 1

Right option is (c) Casagrande

To explain: In 1940, casagrande originally developed the unified soil classification system (USCS).