Red Seal Steamfitter/Pipefitter Practice Exam

What is a common use of arc welding in piping systems?

1. For very high-temperature applications

2. In assemblies that require strength and durability

3. In low-pressure piping systems only

4. For decorative applications only

The correct answer is: In assemblies that require strength and durability

Arc welding is commonly employed in piping systems primarily because it provides strong, durable joints that can withstand various stresses and operational demands. The process involves producing an electric arc between an electrode and the workpiece, which melts the base metal and the filler material to form a robust bond once cooled. This makes arc welding particularly suitable for piping applications where the integrity and strength of the joint are critical. In contrast to the other options, which suggest limitations or specific uses, the application of arc welding is not restricted to low-pressure systems or decorative purposes. Additionally, while high-temperature applications exist, the focus on strength and durability aligns more closely with the fundamental purpose of welding in piping systems. Therefore, the emphasis on assemblies that require strength and durability accurately reflects the primary advantage of using arc welding in these contexts.