NCCER Concrete Finishing Practice Questions - NCCER Concrete Finishing Concrete Finisher Exam

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For exterior flatwork in a freeze-thaw climate with 3/4-inch maximum aggregate, ACI 318 specifies what target total air content?

1 to 2 percent About 6 percent (range 5 to 7 percent) 10 to 12 percent Air entrainment is not required for exterior slabs

Correct Answer:

About 6 percent (range 5 to 7 percent)

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