AL Sewer Projects Practice Questions - Alabama Sewer Projects Contractor Examination Exam

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A laser or grade rod reading shows the trench bottom is 0.15 foot high compared with design invert minus bedding thickness. What should the crew do before laying pipe?

Lay the pipe on the high bottom and force the grade later Remove the excess material so the bedding and invert match design grade Add 0.15 foot to all upstream manhole rims only Ignore the reading because lasers are never accurate

Correct Answer:

Remove the excess material so the bedding and invert match design grade

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