What does attaching the work clamp do?

• A. Protects you from electric shock
• B. Completes the welding circuit
• C. Increases wire feed speed
• D. Grounds the work

Answer: (B)

Attaching the work clamp provides the return path for the welding current, letting the electrical circuit be completed. The power source sends current through the electrode and across the arc into the workpiece, but that current must return somewhere. The clamp bonded to the workpiece completes the circuit back to the power source, enabling the arc to form and be maintained. While having a good clamp also supports safety by providing a solid ground path, the essential function is to finish the circuit. The other options don’t describe this return-path role: wire feed speed is set by the feeder, and while grounding improves safety, it isn’t the direct action of attaching the clamp.