CIVE 3300 Soil Mechanics Final Exam |136 questions| with correct answers

Q1.1: What is the sieve number that is used to separate fine sand from medium sand? CORRECT ANSWER #40 Q1.2: What is the grain size diameter (in mm) that is the dividing line between fines and sand particles? CORRECT ANSWER 0.075mm Q1.5: Mass of wet soil and can before oven = 74.8g Mass of dry soil and can after drying = 61.3g Mass of empty can = 31.2g What is the water content of the soil? CORRECT ANSWER (74.8 - 61.3) / (61.3 - 31.2) = 44.85% Q1.7-9: Use attached grain size graph to determine D10, D60, Cu CORRECT ANSWER D10 = 0.095 D60 = 0.35 Cu = 3.68 Q1.10: TRUE/FALSE - the diffuse double layer is the basic structure of each clay particle, and these clay particle diffuse double layers are the two different mineral sheets bonded together. CORRECT ANSWER FALSE (DDL is the layer of water surrounding the clay particles, particles surrounded by negative charges so water like to bond, montmorillonite DDL kaolinite b/c more surface area) Q1.11: The plastic limit test involves rolling out a soil thread until it just breaks into small pieces when thread is what diameter? CORRECT ANSWER 1/8 inch