Red Seal Concrete Finisher Practice Exam

What is the maximum time recommended for finishing concrete before it begins to set?

1. Up to 30 minutes

2. Generally within 1 to 2 hours

3. About 3 to 4 hours

4. Up to 5 hours

The correct answer is: Generally within 1 to 2 hours

The maximum recommended time for finishing concrete before it begins to set is generally within 1 to 2 hours. This time frame is crucial because it allows the finisher to work with the concrete while it is still in a plastic state, meaning it has not yet begun to harden. During this period, the finishing techniques can be applied effectively, such as floating, troweling, or edging, to achieve the desired surface texture and smoothness. If finishing takes place beyond this window, the concrete mix will start to cure and harden, making it increasingly difficult to achieve a high-quality finish. Selecting the right time allows for proper manipulation of the surface and ensures that the finished product has the required durability and appearance. Exceeding this timeframe significantly affects the ability to correct any imperfections and can result in surface issues that compromise the integrity of the concrete.