Which tool is used to smooth a rough edge on a metal workpiece after cutting?

• A. Hacksaw
• B. Pliers
• C. File
• D. Screwdriver

Answer: (C)

Smoothing a rough edge after cutting is a deburring task, where the goal is to remove burrs and produce a clean, safe edge. A file is the right tool because its abrasive surface lets you remove small amounts of metal gradually and evenly along the edge, giving a smooth, controlled finish. You can choose a flat file for straight edges or a round/half-round file for curved areas, and use steady strokes to blend the edge and eliminate sharp burrs. In contrast, a hacksaw is used for cutting and tends to leave rough edges; pliers may grip or bend but don’t reliably produce a smooth edge; a screwdriver is not intended for finishing metal. So the file best fits the task of smoothing after cutting.