A constant head permeability test was performed on a 40 cm² (cross sectional area) soil sample. The length of the sample was 5 cm, and a 20 cm head difference was applied during testing. If 10 cm³ of water was collected over 60 sec, calculate the coefficient of permeability of the soil. (b) In a falling head permeability test, the head fell from 52 to 25 cm, in 3 minutes. The cross-sectional area of the soil sample is 80 cm²,and the length was 8 cm. If the area of the standpipe was 0.5 cm², compute the coefficient of permeability of the soil.

In a falling head permeability test, the following data was obtained: diameter of standpipe = 1.5 cm; diameter of sample = 10.16 cm; height of water level at beginning of test (h1) = 30 cm; length of sample (L) = 20 cm. The soil had a coefficient of permeability (k) equal to 3.4 x 10°cm/sec. If the test was conducted for a period of 8 hours, what was the water level at the end of the test (h2)? %3D Time when water level is at h, is t, (t,) a = area of standpipe Time when level is at 19% h, is t2 (t2) A = cross-sectional area of soil sample Soil sample

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

P1. Answer the question correctly