What is a 6 by 10 inch piece of wood used to help inset tiles evenly called?

The correct answer is a piece of material used to help inset tiles evenly, which is best described as a beating block. A beating block is typically made of wood and is designed to help gently tap tiles into place, ensuring they are set evenly without damaging the tile surface. This tool is particularly useful during the installation process, allowing the contractor to align the tiles without applying too much force directly to the tile, which could cause chipping or cracking.

A beating block serves to distribute impact force evenly, making it easier to achieve a level and uniform surface. While the other options mention materials or tools relevant to tile installation, none fulfill the specific function of providing a controlled, gentle means to adjust tile placement as effectively as a beating block does. Tile adhesive, for instance, is used to bond tiles to the substrate but does not assist in positioning them correctly, while tile spacers are used to maintain uniform gaps between tiles rather than to adjust their position. Leveling boards are also used for different purposes related to ensuring flatness of the surface rather than direct tile installation.