What term describes plug welds that are randomly alternating in location and not made two or more welds next to each other concurrently?

• A. Sequential
• B. Random
• C. Alternating
• D. Constant

Answer: (C)

Understanding how plug welds sit along a joint helps you describe their pattern. When welds are described as alternating, it means each plug is placed at a different location than the one before, so the welds are staggered rather than lined up side-by-side. In the scenario described, the welds are not made two or more at adjacent spots at the same time, which is exactly what alternating patterns imply: you avoid clustering welds in one area and instead zigzag the locations along the seam. This pattern distributes heat more evenly, helps minimize distortion, and maintains joint integrity.

The other terms don’t fit as well. A sequential pattern suggests a straight, continuous progression from one weld to the next without offset. A random pattern implies no recognizable order or predictability, which isn’t what’s being described by “alternating.” A constant pattern would mean regular, unchanging spacing, but it doesn’t convey the idea of the welds alternating in location along the seam.