Certified Welding Inspector Practice Exam

What defines an autogenous weld?

1. A fusion weld made with filler metal

2. A fusion weld made without filler metal

3. A weld that uses hybrid techniques

4. A weld that requires post-treatment

The correct answer is: A fusion weld made without filler metal

An autogenous weld is characterized by being a fusion weld that is created without the addition of filler metal. In this process, the materials being joined are melted together due to the heat generated by the welding arc or other heat sources, resulting in a solid joint once the molten materials cool and solidify. This method relies primarily on the base metals themselves to form a bond, making it distinct from other types of welding that require filler materials to enhance the joint's strength or integrity. This technique is often utilized in applications where the materials being welded are compatible and able to form a strong joint on their own when melted, such as in some types of butt joints or in instances where the weld area would be adversely affected by the presence of filler metal. Understanding the nature of an autogenous weld is essential for welding inspectors as it relates to the assessment of weld quality, strength, and application suitability.