NM CID GF-9 Practice Questions - New Mexico CID GF-9 Utility Lines Contractor Examination Exam

Why does DIPRA require bell holes at each ductile-iron joint?

To store spoil next to the pipe So the joint can be assembled and the barrel can bear uniformly on the trench bottom instead of riding on the bell To replace polyethylene encasement To create a sediment basin for the SWPPP

Correct Answer:

So the joint can be assembled and the barrel can bear uniformly on the trench bottom instead of riding on the bell

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