![A rock follows Mohr-Coulomb failure criterion. Which one of the Mohr-Coulomb failure envelopes](https://www.gkseries.com/blog/wp-content/uploads/2023/10/A-rock-follows-Mohr-Coulomb-failure-criterion.-Which-one-of-the-Mohr-Coulomb-failure-envelopes.jpg)
Q. A rock follows Mohr-Coulomb failure criterion. Which one of the Mohr-Coulomb failure envelopes shown below allows failure of the rock under stress state Y, but not under stress state X?
![](https://www.gkseries.com/blog/wp-content/uploads/2023/10/image-7.png)
(A) PP’ (B) QQ’ (C) RR’ (D) SS’
Q. A rock follows Mohr-Coulomb failure criterion. Which one of the Mohr-Coulomb failure envelopes shown below allows failure of the rock under stress state Y, but not under stress state X?
(A) PP’ (B) QQ’ (C) RR’ (D) SS’
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