Specific Gravity
1. A pycnometer is used to determine ____.
2. Specific gravity of soil solids is defined as the ratio of the unit weight of soil solids to the unit weight of:
3. The typical range of specific gravity (G) for most inorganic soils is:
4. Why is it necessary to remove air from the soil-water mixture in a pycnometer?
5. Which of the following liquids is sometimes used instead of water for determining the specific gravity of fine-grained soils to improve wetting?
6. If the temperature during the pycnometer test is not 27°C, a correction factor must be applied because:
7. The weight of a pycnometer containing 400 g (W1) sand and water full to the top is 2150 g (W2). The weight of pycnometer full of clean water is 1950 g (W3). If the specific gravity (Gs) of the soil is 2.5, what is the water content of the soil?
8. A soil sample has a specific gravity of 2.7. If the void ratio is 0.7, what is the dry unit weight in kN/m³? (γ_w = 9.81 kN/m³)
9. If the specific gravity of a soil is 2.65 and its bulk unit weight is 19 kN/m³ at a water content of 17.5%, what is its degree of saturation? (γ_w = 9.81 kN/m³)