Which welding process is known for using a continuous solid wire electrode?

• A. Stick welding (SMAW)
• B. MIG welding (GMAW)
• C. TIG welding (GTAW)
• D. Flux-cored welding

Answer: (B)

MIG welding, also known as Gas Metal Arc Welding (GMAW), is recognized for its use of a continuous solid wire electrode. In this process, the wire is fed through a welding gun and melted to create a weld pool, allowing for fast and efficient welding. The continuous feed of the wire contributes to the process's speed and ease of use, making it ideal for applications that require a high production rate. Additionally, MIG welding typically uses a shielding gas to protect the weld from contamination, enhancing the quality of the weld.

In contrast, Stick welding (SMAW) utilizes a consumable electrode coated in flux, which is not continuous and needs to be replaced after consumption. TIG welding (GTAW) employs a non-consumable tungsten electrode and often uses a filler material that is manually fed, rather than a continuous wire. Flux-cored welding, while similar to MIG welding and also uses a continuous feed, employs a tubular wire filled with flux and is generally used for specific applications rather than the standard solid wire typically associated with MIG welding. This makes MIG welding distinct in its continuous solid wire electrode approach.