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

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A New Mexico afternoon pour of a channel lining will see high wind, low humidity, and 90 F concrete. The greatest early-age risk is:

Plastic-shrinkage cracking from rapid surface evaporation before the concrete sets The concrete remaining plastic for several days with no set Air content spontaneously rising above 20 percent The mix gaining too much moisture from the dry air

Correct Answer:

Plastic-shrinkage cracking from rapid surface evaporation before the concrete sets

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