Which type of welding is often associated with the use of a filler material?

• A. Gas tungsten arc welding
• B. Gas metal arc welding
• C. Submerged arc welding
• D. Plasma arc welding

Answer: (B)

Gas metal arc welding is often associated with the use of a filler material because this process involves the continuous feeding of a filler wire that melts during the welding operation to join two pieces of metal together. The filler material is essential in this technique as it not only helps to fill any gaps in the joint but also contributes to the mechanical properties of the weld.

In gas metal arc welding, an electric arc forms between the filler wire and the workpieces being welded, producing heat that melts the metal and the filler material. The process allows for a strong bond to be formed as the filler metal flows into the joint, solidifying and creating a durable connection.

The other types of welding mentioned in the question can utilize filler materials, but their conventional practices may not emphasize filler material to the same extent as gas metal arc welding. For instance, gas tungsten arc welding primarily uses a non-consumable tungsten electrode to produce the weld, and filler material is only added occasionally depending on the specific requirements of the weld. Similarly, submerged arc welding typically uses a continuous arc beneath a blanket of flux, which can sometimes incorporate filler material, but the process itself is often able to generate sufficient filler from the components being joined. Plasma arc welding also typically utilizes a non-cons