Red Seal Concrete Finisher Practice Exam

What is a common mistake when finishing concrete?

1. Failing to work the surface properly

2. Using too much water in the mix

3. Pouring concrete on a windy day

4. Neglecting to cure the concrete

The correct answer is: Failing to work the surface properly

A common mistake when finishing concrete is failing to work the surface properly. This step is crucial because how the surface is finished affects not only the aesthetics but also the durability and strength of the concrete. Proper finishing involves techniques such as screeding, floating, and troweling, which help to achieve a smooth surface and promote proper hydration of the concrete. When the surface is not worked adequately, issues like unevenness, excessive texture, or surface defects can arise, leading to potential long-term problems such as cracking or surface deterioration. It's essential to be attentive during this phase to ensure the concrete is compacted and leveled correctly, forming a strong and durable surface that will withstand the expected usage and environmental factors over time. While the other options refer to important factors in the concrete finishing process, they do not directly address the technique of working the surface, which is a hands-on skill that can significantly impact the final outcome.