The purpose for a reaming tool is to __________________________.

A reaming tool is specifically designed to remove burrs from the edges of cut tubing. When metal tubing is cut, especially with tools like hacksaws or pipe cutters, the edges can become jagged or have small raised areas known as burrs. These burrs can lead to improper fittings and can obstruct the flow of refrigerant within the system. By using a reaming tool, the edges of the tubing are smoothed out, which enhances the overall quality of the joint when fittings are applied. It contributes to a more secure seal and minimizes the risk of leaks, ensuring optimal performance of the refrigeration system.

The other options pertain to different processes: enhancing the fit of fittings might involve other tools or techniques, preparing a joint for welding involves methods suited for welds, and cleaning the tubing interior is generally done with brushes or solvents rather than a reamer. Thus, the specific function of a reaming tool in removing burrs is vital for the integrity of the tubing connections in refrigeration systems.