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

Placing structural concrete when the air temperature is below freezing requires the contractor to:

Place the concrete on frozen subgrade so the ground "holds the forms" Protect the concrete from freezing until it gains sufficient strength, using heated materials, insulated forms, or enclosures as the specification requires Add extra water so ice crystals improve workability Skip curing because cold air is already moist

Correct Answer:

Protect the concrete from freezing until it gains sufficient strength, using heated materials, insulated forms, or enclosures as the specification requires

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