AL Water Projects Practice Questions - Alabama Water Projects Contractor Examination Exam

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On a hot, windy Alabama afternoon, a tank floor begins to show early surface cracks while the concrete is still plastic. What is the most likely cause and a proper response?

The cracks are form-tie holes and should be ignored The mix has too little water and more water should be added on the slab Rapid evaporation is causing plastic shrinkage; cool materials, fog, and specified retarders help Plastic cracks mean the concrete is already at design strength

Correct Answer:

Rapid evaporation is causing plastic shrinkage; cool materials, fog, and specified retarders help

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