SOILS N FOUNDATION EXAM WITH DETAILED ACTUAL QUESTIONS AND CORRECTLY WELL DIFINED ANSWERS.

T/F Soil particles are the result of weathering of rocks and organic decomposition. - correct answer T Which of the following rocks are formed from volcanic eruption? Metamorphic Igneous Sedimentary - correct answer Igneous rocks Which of the following rocks composing the most majority of rocks found on earth's surface? Igneous Sedimentary Metamorphic - correct answer sedimentary Which of the following rocks are formed from compressed sediments? Metamorphic Igneous Sedimentary - correct answer Sedimentary Which of the following are formed from original rocks going thru additional pressure and temperature to change into a new rock type? Sedimentary Metamorphic Igneous - correct answer Metamorphic Which of the following soil types has the finest grain size? Clay Silt Gravel Fine sand - correct answer Clay T/F Granular soils are gravel and sand, also called coarse-grained soils. - correct answer T The grain size of soil is measured using a ___. Scale Sieve Ruler Micrometer - correct answer Sieve The soils above which sieve are gravels? No. 10 No. 4 No. 200 No. 100 - correct answer No. 4 The soils passing which sieve are silt and clay? No. 4 No. 100 No. 10 No. 200 - correct answer No. 200 What is the size of openings for a No. 4 sieve? .0075 mm 4.75 mm 0.425 mm 2 mm - correct answer 4.75 mm What is the opening size for No. 200 sieve? 4.75 mm 0.075 mm 2 mm 0.425 mm - correct answer 0.075 mm T/F Atterberg defined four states of cohesive soils as liquid, plastic, semisolid, and solid states. - correct answer T T/F The distribution of soil particle sizes larger than 0.075 mm is determined by sieve analysis; the distribution of particle sizes smaller than 0.075 mm is determined by hydrometer analysis. - correct answer T T/F The Atterberg limits tests are applied to soils passing No. 200 sieve. - correct answer F Which of the following items is not an Atterberg limit? Plastic limit Liquid limit Shrinkage limit Plastic index - correct answer Plastic index T/F The liquid limit is the water content at which soil changes from liquid state to plastic state. - correct answer T Which of these factors has the most effect on the classification of soil? Hardness of particles size of particles static weight of particles behavior when moisture content varies - correct answer Size of particles What are the commonly used soil classification systems in civil engineering (choose two)? AASHTO MIT USDA USCS - correct answer AASHTO, USCS Which of the following parameter is not needed when classifying soils according to AASHTO classification system? Liquid limit Grain-size analysis Plastic limit Shrinkage limit - correct answer The results of a grain-size analysis is given below. What is the percentage passing No. 4 sieve? US Sieve No. Size of opening (mm) Mass retained (g) 3/8 in. 9.5 0 No. 4 4.75 28 No.10 2 102 No. 40 0.425 250 No. 100 0.15 218 No. 200 0.175 189 Pan NA 213 3% 12% 97% 86% - correct answer 97 % The results of a grain-size analysis is given below. What is the percentage passing No. 40 sieve? US Sieve No. Size of opening (mm) Mass retained (g) 3/8 in. 9.5 0 No.4 4.75 28 No.10 2 102 No. 40 0.425 250 No. 100 0.15 218 No. 200 0.175 189 Pan NA 213