What tells you what kind of weld you are going to perform on a given joint?

• A. Weld symbol
• B. Reference line
• C. Arrow
• D. Tail

Answer: (A)

In a welding drawing, the weld symbol is what tells you the exact weld to perform on the joint. The shape and marks of the symbol specify the type of weld—fillet, groove, or other weld forms—and can carry size and other details when combined with the tail. The reference line is just the baseline for the symbol, the arrow points to where the weld goes, and the tail holds extra instructions. So the weld symbol alone communicates the required weld type for that joint.