Select the incorrect statement?

2226Civil EngineeringMedium

AEffective angle of internal friction is a complicated function of mineralogy and clay size content

BEffective angle of internal friction for coarse grained soils is rarely below 30°

CEffective angle of internal friction for a soil increases as state of compact-ness increases

DEffective cohesion of a soil can never have a negative value

Correct answer

D. Effective cohesion of a soil can never have a negative value

Explanation

The correct answer is Effective cohesion of a soil can never have a negative value.

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