Please kindly answer the following question. It will be reallykind if you answer all the question. Thank you.

1. Explain the importance of coefficient of curvature as youdetermine from the particle-size distribution curve.

2. A test group G1 compacts the soil in the compaction mould in3 layers, giving 25 blows of rammer to each layer. Another testgroup G2 of your laboratory session uses 5 layers, giving 25 blowsof rammer to each layer. How will the compaction test parameters(maximum dry unit weight and optimum water content) of the twogroups vary?

3. Classify the soil according to USCS based on the followinginformation:

Passing 75 µm = 10% ,Passing 4.75 mm = 70%, Uniformitycoefficient = 8, Coefficient of curvature = 2.8 , Plasticity index= 4

4. Is it possible to get the specific gravity value using 3weight measurements? Justify your answer.

5. Derive the analytical expression for the specific gravity ofsoil based on its basic definition.

6. Explain the importance of ZAV curve, and plot it for the soilas you see in your suburb.

7. In a liquid limit test, the crank of the Casagrande liquidlimit device, as you see in the video demonstration of the testavailable at the BB unit site, is turned at the rate of 2 r/s sothat the cup is lifted and dropped until the two parts of the soilcome into contact along the bottom of the groove for a distance of10 mm. A test group G1 followed this standard practice, but anothertest group G2 used 1 r/s. How do the liquid limit values vary?Explain briefly.