GATE, PSUs- Soil Engineering ( notes)- Part 6

Hello there,
Welcome to the part 6 of the one liner notes useful for the preparation of GATE and other similar examinations.

• In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear decreases.
• Skempton's pore pressure co-efficient B for saturated soil is 1.
• Shear strength of a soil is a unique function of shear strength.
• In a deposit of normally consolidated clay effective stress and undrained strength increase with depth but water content decreases with depth.
• Effective angle of shearing resistance increases as the size of particles increases and is rarely more than 30 degrees for fine grained soil.
• Unconfined compressive strength test is un-drained test.
• The angle that Coulomb's failure envelope makes with horizontal is called angle of friction.
• In a tri-axial compression test on a soil specimen, the intermediate principal stress is equal to minor principal stress.
• If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is 45 degrees. 
• In a direct shear box test, the plane of failure is predetermined.
• Better control is achieved on the drainage of the soil in a tri-axial compression test.
• Stress distribution on the failure plane in the case of tri-axial compression test is uniform.
• If the shearing stress is zero between two planes, then the angle between the two planes is 90 degrees.
• In the tri-axial compression test, the application of additional axial stress(i.e. deviator sress) on the soil specimen produces shear stress on all planes except horizontal and vertical planes.

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You can refer such question on the book "Civil Engineering Objectives" by S P Gupta and S P Gupta.