SC Water And Sewer Lines Practice Questions - South Carolina Water And Sewer Lines Contractor Examination Exam

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When backfilling a ductile-iron water main under a street, how does DIPRA say the soil is normally compacted up to subgrade?

In one lift from the top of the pipe to the pavement In 6- to 12-inch lifts using mechanical compactors By flooding the entire trench in a single shot, including around restrained joints By driving trucks along the open trench to wheel-roll the backfill

Correct Answer:

In 6- to 12-inch lifts using mechanical compactors

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