Question

identify the following weld defect.
whiskers
undercut
cracking
cold start
porosity

Explanation:

Analyze the visual evidence

Using the Welding Defects knowledge point, we examine the provided image of the weld bead. The surface of the weld bead exhibits numerous small, rounded cavities, pits, and gas pockets scattered throughout the metal.

Evaluate the options

Using the Porosity knowledge point:

• Whiskers: Unmelted electrode wire protruding through the root of the weld. Not present here.
• Undercut: A groove melted into the base metal adjacent to the weld toe. Not present here.
• Cracking: Linear fractures in the weld or base metal. Not present here.
• Cold start: Lack of fusion at the beginning of the weld. Not present here.
• Porosity: Cavities or gas pockets formed by gas entrapment during solidification, matching the visible pits.

Answer:

• Whiskers
• Undercut
• Cracking
• Cold start
• Porosity (Correct answer)