Correct option is C
The
pycnometer is an apparatus used to determine the
specific gravity of soil solids. Specific gravity is the ratio of the density of the soil particles to the density of water. The pycnometer method is a common laboratory test used for cohesive and non-cohesive soils. The test involves placing a known mass of dry soil in a pycnometer, filling it with water, and then measuring the mass of the pycnometer when filled with water and soil. By calculating the displacement of water, the specific gravity of the soil is determined. This method is preferred for its accuracy and simplicity.
