Computer · Soil Mechanics

Choose the INCORRECT statement among the following: I) Pole is the origin of planes. II) Two planes at right angles to each other on which the shear stress is zero are called principal planes. III) Mohr's circle for any point in a soil sample subjected to a hydrostatic pressure (σ) is a point at a distance from the origin. IV) The field test used to determine the undrained shear strength of soft clay is the plate load test.