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    Question

    The purpose of cut-off walls in drop structure is to

    A support gully walls Correct Answer Incorrect Answer
    B spill the flow safely Correct Answer Incorrect Answer
    C dissipate kinetic energy of flow Correct Answer Incorrect Answer
    D provide strength against sliding Correct Answer Incorrect Answer

    Solution

    cut-off walls act as a key for the structure, prevent piping under the structure besides reducing uplift and sliding

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