A carefully-weighed 51.3 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). For the soil to have 47 % clay-sized particles in this sample, the 8 hour hydrometer reading would have to be:

A fully saturated cylindrical triaxial sample of clay soil has approximate initial dimensions of 38mm in diameter by 76mm long. A quick undrained triaxial test is conducted on the specimen where the cell pressure is 140 kN/m2. In this the deviator stress at failure is 76 kN/m2. After the triaxial test, a water content test is conducted on the entire sample. The combined weight of the wet sample and sample container was 181.7 g. The combined weight of the oven dried sample and sample container was 147.8 g. The sample container weighs 9.2 g. The soil solids specific gravity is 2.7. What is the undrained strength of the soil? Also, what are the water content of the soil, its total (or bulk) unit weight, and its voids ratio?

An in-situ density test on a 542.5 cm³ soil sample was conducted. The total weight of the sample at the site was 801.3 gr. Soil samples of the test were collected and moisture content was determined to be 4.5%. Assuming G, = 2.71 determine: (a) The in-situ unit weight of the soil in kN/m³. (b) The void ratio of the soil. (c) The porosity of the soil. (d) The degree of saturation.

A carefully-weighed 52.9 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The hydrometer reading after 40 seconds was 20.1 and the hydrometer reading after 8 hours was 5.1. What percentage of particles in the soil sample were clay-sized? Your Answer: Answer units

Tina 20 Two soil specimens with identical geometric dimensions were subjected to falling head permeability tests in the laboratory under identical conditions. The fall of water head was measured after an identical time interval. The ratio of initial to final water heads for the test involving the first specimen was 1.25. If the coefficient of permeability of the second specimen in 5 times that of the first, the ratio of initial to final water heads in the test involving the second specimen is

A soil sample was taken with a core samples from a field when soil reached field capacity. The oven dry sample weighed 1.39 kg. The inside diameter of the core was 8.97 cm and the length was 17.26 cm. Determine the apparent specific gravity of the soil.

A cylindrical sample soil, having cohesion of 0.8 kg/cm² and angle of internal friction of 20°, is subjected to a cell pressure of 1.0 kg/cm². Calculate the maximum deviator stress at which the sample will fail and the angle made by the failure plane with the axis of the sample.

A soil sample's liquid limit (LL) is 40 and its plastic limit (PL) is 20, the soil's plasticity index (PI) is: 60 20 2

A soil sample's liquid limit (LL) is 40 and its plastic limit (PL) is 20, the soil's plasticity index (PI) is: 60 20 2