What should the completed welds be free from?

What should the completed welds be free from?

• A. Cracks and incomplete fusion
• B. Porosity
• C. Excessive weld bead height
• D. Cracks

Answer: (A)

Weld integrity is about having a sound, continuous joint that can reliably carry the system’s pressure. The most critical defects to avoid are cracks and incomplete fusion. Cracks allow a seam to propagate under pressure or temperature changes, risking failure of the standpipe or hose connection. Incomplete fusion means the weld did not properly bond to the base metal, leaving a weak area that can fail under service loads. Those two issues directly compromise the strength and watertightness of the joint, which is why the completed welds should be free from them. Porosity is also an undesirable defect because gas pockets weaken the weld, but the best answer highlights the two fundamental problems that most threaten joint integrity. Excessive weld bead height is more about fit-up and appearance and less about the weld’s structural reliability in service. So the correct concept is that welds should be free from cracks and incomplete fusion.

Weld integrity is about having a sound, continuous joint that can reliably carry the system’s pressure. The most critical defects to avoid are cracks and incomplete fusion. Cracks allow a seam to propagate under pressure or temperature changes, risking failure of the standpipe or hose connection. Incomplete fusion means the weld did not properly bond to the base metal, leaving a weak area that can fail under service loads. Those two issues directly compromise the strength and watertightness of the joint, which is why the completed welds should be free from them.

Porosity is also an undesirable defect because gas pockets weaken the weld, but the best answer highlights the two fundamental problems that most threaten joint integrity. Excessive weld bead height is more about fit-up and appearance and less about the weld’s structural reliability in service. So the correct concept is that welds should be free from cracks and incomplete fusion.