Question

Which of the following statements is not true in the context of capillary pressure in soils ?

• A. Water is under tension in capillary zone
• B. Pore water pressure is negative in capillary zone
• C. Effective stress increases due to capillary zone
• D. Capillary pressure is more in coarse grained soils

Answer 1

The correct option is D Capillary pressure is more in coarse grained soils

In coarse grained soil, the size of voids is more than fine grained soil.

So, height of capillary rise will be less in coarse grained soil, hence less capillary pressure in coarse grained soil.