Red Seal Metal Fabricator (Fitter) Practice Exam

What is the primary function of a plasma cutter in metalwork?

1. To weld two pieces of metal together

2. To cut through electrically conductive materials using ionized gas

3. To polish metal surfaces

4. To bend metal into specific shapes

The correct answer is: To cut through electrically conductive materials using ionized gas

The primary function of a plasma cutter in metalwork is to cut through electrically conductive materials using ionized gas. Plasma cutting works by creating a high-temperature plasma arc that is directed through a nozzle. This arc reaches extreme temperatures, allowing it to melt the metal. As the molten metal is blown away by the force of the gas, it results in a clean cut. This method is particularly effective for cutting materials such as steel, aluminum, and other conductive metals. The precision and speed of plasma cutting make it a popular choice in various metal fabrication applications, including automotive repair, industrial manufacturing, and artistic metalwork. The other options, such as welding, polishing, and bending, refer to different metalworking processes that have distinct functions and tools. Welding involves joining pieces of metal together, polishing enhances the finish of the surfaces, and bending alters the shape of the metal. Each process requires different equipment and techniques specific to its purpose.