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

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Unless the engineer specifies otherwise, what hydrostatic test does DIPRA recommend for a newly installed ductile-iron water main?

Working pressure for 15 minutes before any backfill At least 1.5 times the stated working pressure at the lowest elevation of the test section, held for two hours Twice the working pressure for 24 hours A 25 mg/L chlorine residual test in place of a pressure test

Correct Answer:

At least 1.5 times the stated working pressure at the lowest elevation of the test section, held for two hours

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