1 -Vane Shear test apparatus Procedure:  Prepare two or three specimens of the soil sample of dimensions of at least 37.5 mm diameter and 75 mm length in specimen.(L/D ratio 2 or 3).  Mount the specimen container with the specimen on the base of the vane shear apparatus. If the specimen container is closed at one end, it should be provided with a hole of about 1 mm diameter at the bottom.  Gently lower the shear vanes into the specimen to their full length without disturbing the soil specimen.  The top of the vanes should be at least 10 mm below the top of the specimen. Note the readings of the angle of twist.  Rotate the vanes at an uniform rate say 0.1 0 /s by suitable operating the torque application handle until the specimen fails.