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

High-plasticity clay (high PI) in a New Mexico flood-control berm is a concern primarily because it:

Never needs moisture control Can swell when wetted and shrink when dried, causing cracking, settlement, and seepage paths if not moisture-conditioned and compacted as specified Is classified as stable rock under OSHA Cannot be excavated with a hydraulic excavator

Correct Answer:

Can swell when wetted and shrink when dried, causing cracking, settlement, and seepage paths if not moisture-conditioned and compacted as specified

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