Sliding failure occurs in a solid gravity dam when____________________?
Correct answer: A. Shear friction factor Is less than 1.5
- A. Shear friction factor Is less than 1.5
- B. Resultant of all forces cuts the base at the inner middle third point
- C. Ratio of over turning moments exceeds than unity
- D. Resultant of all forces cuts the base of the dam out side the toe
Explanation
Sliding becomes unsafe when the factor of safety against sliding falls below the prescribed value, commonly 1.5 for a gravity dam. The other options describe overturning or eccentricity conditions rather than sliding failure.
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