What should be done immediately after the tubing has been cut with a tube cutter?

The immediate action that should be taken after cutting tubing with a tube cutter is to use the tube reamer on the cutter to remove the burr inside the tube. This step is crucial because cutting tubing can often leave behind sharp edges or burrs that may cause issues when connecting different components later. By reaming the inside of the tube immediately after cutting, you help ensure that those burrs are removed, which ensures a smooth flow through the tubing and reduces the risk of damage to fittings or other components when assembled. This preparation is essential for creating tight seals and preventing leaks in the tubing system.

Other options, while they may seem reasonable, do not prioritize addressing the burrs left inside the tube, which could lead to operational problems later on. Cleaning the outer edge or inspecting for irregularities are important steps in maintaining a proper workspace, but they should be performed after ensuring that the tubing cut is safe and functional for assembly.