Question

Which of the following is not a failure due to the role of water?

(a) Increase in pore pressure

(b) Accumulation of water at the back of the rock

(c) Accumulation of water at the front of the rock

(d) Lubrication effect of the rock mass

This question was posed to me in a job interview.

The question is from Causes of Mass Movements topic in portion Mass Movements of Engineering Geology

Answer 1

Correct choice is (c) Accumulation of water at the front of the rock

The best explanation: The various causes of rock mass due to the role of water are: Increase in pore pressure, accumulation of water behind the rock mass, lubrication of water etc. Water cannot get accumulated in front of the rock and if it does happen in some conditions, it does not contribute greatly to the failure.