Visual Testing (VT) Practice Exam

What is the term for the melting and fusing of filler metal and base metal into a straight continuous weld pass?

1. Multi-pass weld

2. Depressed bead

3. Stringer bead

4. Weave pattern

The correct answer is: Stringer bead

The term that describes the melting and fusing of filler metal and base metal into a straight continuous weld pass is known as a stringer bead. This method involves a single pass of the welding rod or filler material along the joint, resulting in a weld that is long and narrow, resembling a string. Stringer beads are particularly effective for achieving a strong bond in the welded area while minimizing the heat input and potential distortion of the metals being joined. This technique is commonly used in processes such as MIG and TIG welding, where precision and control over the weld bead's shape are crucial for the integrity of the final product. In contrast, other choices refer to different welding techniques or outcomes. A multi-pass weld involves multiple layers of weld beads, creating a thicker joint and is typically used for thicker materials. A depressed bead refers to a weld that is lower than the surrounding metal, which may indicate an issue with the welding process. Weave patterns involve moving the welding torch or rod in a side-to-side motion to create a wider bead, which is useful in certain applications but does not describe a straight continuous pass.