Red Seal Concrete Finisher Practice Exam

What is a Float used for in concrete finishing?

1. To add color to the concrete

2. To create a level surface and remove excess water

3. To reinforce the concrete

4. To mix the concrete

The correct answer is: To create a level surface and remove excess water

A float is an essential tool in concrete finishing primarily used to create a level surface and to remove excess water from the top of the freshly poured concrete. When concrete is first poured, it often has a rough and uneven surface and may also have a layer of water on top. Using a float helps to smooth out these imperfections by pushing the aggregate down and bringing the cream (the top layer of the concrete that is richer in cement) to the surface, which improves the overall finish. This process not only helps in leveling but also aids in ensuring that the finish is uniform, which is crucial for aesthetic and functional purposes. By floating the surface, you also help in consolidating the surface, which can enhance the strength and durability of the final product. Thus, the use of a float is vital for achieving a high-quality finish in concrete work.