What is the function of an arc welding electrode, and how do you select one for welding mild steel?

• A. It generates heat only; choose by color.
• B. It provides filler metal and shielding; select electrode type and coating suitable for the material and position (e.g., E6011 or E6013 for mild steel).
• C. It cools the metal.
• D. It acts as a vise.

Answer: (B)