Red Seal Carpenter Practice Exam

What procedure is used to ensure a true surface is achieved when pouring a concrete slab?

1. Screeding and power floating.

2. Screeding and bullfloating.

3. Bullfloating and trowelling.

4. Screeding and fresnoing.

The correct answer is: Screeding and bullfloating.

Screeding and power floating (Choice A) may result in a smooth surface, but it does not guarantee a true surface as there may be variations in the level. Bullfloating and troweling (Choice C) also creates a smooth surface, but it does not specifically address ensuring a true surface. Fresnoing (Choice D) is the process of using a large tool to smooth the surface, but it does not involve leveling the concrete. Therefore, the best procedure to ensure a true surface is achieved when pouring a concrete slab is to use screeding and bullfloating (Choice B). Screeding creates an initial level surface and bullfloating helps to eliminate any deviations in the level, resulting in a true and even surface for the concrete slab.