What is the first action in the sequence for shaping the tungsten end?

• A. Properly install the tungsten
• B. Strike arc
• C. Set argon gas flow
• D. Turn on the machine

Answer: (A)

Securing the tungsten electrode in the torch is the first step because nothing else can be prepared or shaped properly until the electrode is physically in place and held securely. When the electrode is properly installed in the collet with the correct protrusion, you can safely grind its tip to the desired shape without the risk of the electrode wobbling, breaking, or contaminating the tip. Once it’s fixed, shaping the end becomes effective and reproducible, giving you a consistent arc start and stable welding conditions. After the electrode is installed and shaped, you would proceed with other setup steps like establishing the shielding gas flow and enabling the machine, then you can strike the arc as needed.