# The shear strength is the most important characteristic of the soil. What is/are the correct reason(s) due to which the shear resistance of the soil o

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The shear strength is the most important characteristic of the soil. What is/are the correct reason(s) due to which the shear resistance of the soil occurs?

A. Cohesion

B. Structural resistance

C. Friction

1.  B and C
2.  A, B and C
3.  Only C
4. A and C

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Correct Answer - Option 2 :  A, B and C

Concept:

Shear resistance in soil occurs due to:

1. Frictional Resistance: Frictional resistance accounts for grain to grain friction and interlocking between particles (structural resistance)

2. Cohesive Resistance: Cohesive resistance is of two types:

• True cohesion
• Apparent cohesion

So, shear resistance of the soil occurs due to friction, cohesion and structural resistance.

Note:

True cohesion is on account of cementation, electrostatic/electromagnetic attraction and adhesion whereas apparent cohesion is due to capillary action.