What is a safe practice regarding tungsten during TIG welding?

• A. Do not touch tungsten to the puddle or filler metal
• B. Touch tungsten to the puddle to gauge heat
• C. Dip tungsten in water during operation
• D. Move tungsten in a circular pattern continuously

Answer: (A)

In TIG welding, the tungsten electrode must stay clear of the molten pool and filler metal so it remains uncontaminated and the arc stays stable. If the tungsten touches the puddle or filler, atoms from the molten metal can contaminate the tip, creating weld defects and making the arc wander or become unstable. That contamination can also cause the tungsten to stick to the work, leading to frequent electrode changes and poor bead quality. Keeping the tungsten free from contact helps you maintain a clean, controlled weld.

Dipping the tungsten in water during operation is unsafe because water near an energized arc can flash to steam, posing a splatter and electric-shock hazard and potentially introducing defects into the weld through rapid cooling or steam expansion.

Touching the tungsten to gauge heat isn’t reliable and risks contaminating the electrode and weld, so it’s not a recommended safe practice.

Moving the tungsten in a circular pattern continuously is a technique choice and does not address the safety issue of keeping the electrode from contacting molten metal.