NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage Or Flood Control Systems Contractor Examination Exam

DIPRA requires bell holes at each ductile-iron joint so that:

The entire barrel hangs from the bells with no soil support The joint can be assembled (and polyethylene overlapped) while the pipe barrel bears uniformly on the trench bottom Workers have a place to store spoil inside the trench The trench automatically meets OSHA Type A slopes

Correct Answer:

The joint can be assembled (and polyethylene overlapped) while the pipe barrel bears uniformly on the trench bottom

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