ACI Concrete Flatwork Finishing Certification Practice Test

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What is a mason's line used for in concrete flatwork?

To check moisture content

To ensure level and straight alignment

A mason's line is primarily used to ensure level and straight alignment during the setting of forms for concrete flatwork. This tool is a string line stretched between stakes or other fixed points, which provides a reference for the placement of the concrete. By using the mason's line, workers can verify that edges are straight and that the overall surface is level, crucial factors in achieving a quality finish and ensuring that the concrete slab meets design specifications.

Checking moisture content is typically done with other methods and tools, as this requires specific testing to determine the water-to-cement ratio. Mixing concrete involves combining the dry ingredients with water and additives, which also does not utilize a mason's line. Lastly, applying decorative finishes is a separate process that falls after the flatwork is placed and cured, relying on a different set of tools and techniques.

To mix the concrete

To apply decorative finishes

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