When visually inspecting a plug weld, the hole must be completely filled, with a nugget height no more than 3 mm (1/8"), and no cracks, porosity, or undercut.

When visually inspecting a plug weld, the hole must be completely filled, with a nugget height no more than 3 mm (1/8"), and no cracks, porosity, or undercut.

• A. Nugget height
• B. Cracks
• C. Porosity
• D. Hole

Answer: (D)

In plug weld visual inspection, you’re assessing the hole where the weld fills. The criteria described—hole completely filled, nugget height limited to 3 mm (1/8"), and no cracks, porosity, or undercut—refer to the condition of that hole and the weld inside it. The focus is on the hole as the feature being evaluated; the nugget height is a characteristic of the weld within the hole, while cracks, porosity, and undercut are defects to be rejected. So the quantity being described and checked for acceptance is the hole itself.

In plug weld visual inspection, you’re assessing the hole where the weld fills. The criteria described—hole completely filled, nugget height limited to 3 mm (1/8"), and no cracks, porosity, or undercut—refer to the condition of that hole and the weld inside it. The focus is on the hole as the feature being evaluated; the nugget height is a characteristic of the weld within the hole, while cracks, porosity, and undercut are defects to be rejected. So the quantity being described and checked for acceptance is the hole itself.