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University of Technology, Sydney Faculty of Engineering 48360 Geotechnical Engineering QUIZ 1 Time Allowed: 40 min Name: Student number: Circle only one letter associated with the correct answer: Mass (g) Vol. (cm 3 ) Air 0 20 Water 30 30 Solids 265 100 Total 295 150 Q1. Use the above table provided for a soil sample to find the void ratio of the soil: a. 0.4 b. 0.5 c. 0.6 d. 0.45 e. 0.55 Q2. The effective principal stresses in a sample of sand at failure are given below: σ′ 1 = 100 kPa, σ′ 3 = 40 kPa Determine the effective friction angle of this soil sample. a. 46.4 ° b. 57.7 ° c. 27.5 ° d. 25.4 ° e. 30 ° Q3. What is the maximum size of silt according to the Australian Standards: a. 2 μ m b. 20 μ m c. 60 mm d. 60 μ m e. 2 mm Q4. Soils deposited by water are called? a. Aeolian b. Glacial c. Colluvial d. Alluvial e. Fill Q5. A soil specimen has a dry density of 1.8 t/m 3 and water content of 20%. Determine the total unit weight of the soil in kN/m 3 . a. 2.16 b. 19.8 c. 20.7 d. 21.2 e. 19.3 Q6. What is the name of this apparatus? a. CPT b. Hand penetrometer c. Vane shear d. Dial gauge e. Oedometer f. SPT Q7 . A coarse grained soil contains: 55% sand and 37% gravel with 8% clay. The C u = 5 and C c = 2. What is its USCS symbol of this soil?
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