Certified Welding Inspector Practice Exam

What characterizes arc stud welding?

1. An arc welding process using a metal stud as the activator

2. A process that requires external filler metal

3. A technique that only uses shielding gas

4. A method involving high-pressure application exclusively

The correct answer is: An arc welding process using a metal stud as the activator

Arc stud welding is characterized by using an arc welding process that employs a metal stud as the activator. In this technique, an electric arc is created between the stud and the workpiece, which simultaneously melts both the tip of the stud and the surface of the workpiece. This melting allows for the formation of a strong, solid connection once the stud is pressed against the workpiece after the arc is extinguished. The use of the metal stud as the activator is essential because it allows for a quick and efficient method to attach various components, making it a preferred choice in many industrial applications such as construction and manufacturing. The unique nature of this welding process enables it to achieve excellent bonding without the complexities associated with other welding methods that may require additional filler materials or be affected by environmental factors like shielding gas.