What are the two main processes used in welding and cutting?

The two main processes used in welding and cutting are gas and electric. Gas welding utilizes a flame produced by the combustion of gases, typically oxygen and acetylene, to melt and fuse metal parts together. This method is widely used for its portability and effectiveness in various applications, particularly for thinner materials or repair work.

Electric welding, on the other hand, involves the use of an electrical current to generate heat, melting the base metal and allowing it to fuse. This category includes several techniques such as arc welding (MIG, TIG, and stick welding), which are common in industrial settings and provide strong and reliable joints in thicker materials.

Together, these processes form the foundation of welding and cutting practices, making them essential tools in metal fabrication and repair industries. Other options such as water, plasma, or laser welding, while important in specific contexts, are not as broadly categorized as the primary processes of welding and cutting as gas and electric methods are.