AWS Welding Inspection and Testing Certification Practice Test

Which of the following is NOT a type of weld joint?

1. Butt

2. T

3. Fillet

4. Corner

The correct answer is: Fillet

The correct answer identifies a type of weld joint that does not belong to the common classifications of weld joints used in fabrication and structural applications. The types of weld joints are typically categorized based on their geometric configuration and include butt joints, corner joints, edge joints, and fillet joints. Each of these serves a specific purpose in different welding applications. A butt joint involves the joining of two pieces end-to-end or edge-to-edge at their ends, which is quite common in structural and pipeline welds. A corner joint is formed when two pieces are placed at a right angle to each other, typically for frames or structural supports. A fillet joint is often used to connect two surfaces at an angle to each other, and is characterized by its triangular cross-section. The term "T" does not represent a recognized type of weld joint; instead, it may informally refer to a T-joint which is a configuration where a piece is welded to the surface of another, but it is not listed as a standard weld joint type in many classifications. This is what differentiates it from the others in the question, making "T" the correct choice for the option that is not recognized as a distinct type of weld joint.