Red Seal Metal Fabricator (Fitter) Practice Exam

What kind of joint is created when two pieces of metal are joined end to end?

1. Lap joint

2. Corner joint

3. T fillet joint

4. Butt joint

The correct answer is: Butt joint

A butt joint is created when two pieces of metal are aligned end to end and welded together. This type of joint is commonly used in welding and fabrication because it allows for a clean, flat surface without overlapping metal, which is important for structural integrity and aesthetic finishes. Butt joints can be made using various welding methods, including MIG, TIG, or stick welding, and they can be found in numerous applications ranging from structural frames to intricate machinery. The design of a butt joint helps distribute stress evenly along the weld seam, making it suitable for high-strength applications. In contrast, other joint types such as lap joints, corner joints, and T fillet joints involve overlapping or connecting metal pieces at angles, which are different configurations and suitable for different applications.