Question

A soil mass is said to be in plastic equilibrium, if:
1. It is in plastic stage
2. It is stressed to maximum
3. It starts flowing
4. It is on the verge of failure

Answer 1

Correct Answer - Option 4 : It is on the verge of failure

Explanation:

Plastic Equilibrium: 

Plastic equilibrium is a state of a permanent change of soil structure when stressed further. An example is the landmass filling. But the elastic equilibrium is done when all the elements in a volume stretched at the same time return to normal when the stress force is not there.

Soil is just to fail or on the verge of failure at plastic equilibrium.