The gradual increase of water content in soil, makes the soil change its form from solid to semi solid to plastic to liquid. The water contents at which the phase change of soil occurs, are called the consistency limits.
Breakpoint chlorination is the point where the demand for chlorine has been fully satisfied in terms of chlorine addition to the water. In other words, the chlorine has completely reacted with the bather pollutants leaving a zero chlorine residual.
The force method (also called the flexibility method or method of consistent deformation ) is used to calculate reactions and internal forces in statically indeterminate structures due to loads and imposed deformations.