Red Seal Metal Fabricator (Fitter) Practice Exam

What does the term "distortion" refer to in the context of metal fabrication?

1. Intentional design changes made during fabrication

2. Changes in color of the metal under heat

3. Unintended changes in shape or size caused by heat or pressure

4. Variations in metal grain structure

The correct answer is: Unintended changes in shape or size caused by heat or pressure

The term "distortion" in metal fabrication specifically refers to unintended changes in shape or size caused by heat or pressure. During processes such as welding, cutting, or bending, the application of heat can cause the metal to expand and then contract unevenly as it cools. This can lead to warping or twisting, which alters the metal's original dimensions and can affect the functionality or fit of the final product. Understanding distortion is crucial for fabricators because managing it is key to achieving precise tolerances and maintaining the structural integrity of the components being produced. The other options do not accurately convey the concept of distortion; intentional design changes, changes in color, and variations in metal grain structure relate to different aspects of metal fabrication and handling.