Texes Art EC-12 Practice Exam

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What is the primary aim of welding in metalworking?

To bond metals at low temperatures
To create an electrical contact
To fuse two metals or plastics using heat
To manipulate surfaces through pressure

The correct answer is: To fuse two metals or plastics using heat

The primary aim of welding in metalworking is to fuse two metals or plastics using heat. This process involves melting the base materials along with a filler material to create a strong joint as the molten materials cool and solidify. Welding is distinguished by its application of heat, which can be generated by various methods such as electric arcs, lasers, or gas flames, enabling the materials to join inseparably. Fusing provides structural integrity to assemblies and is essential in manufacturing, construction, and repair processes where the strength and durability of the joining method are critical. This characteristic is often what sets welding apart from other joining techniques, such as soldering or adhesive bonding, which do not involve melting the base materials.