Which of the following is NOT a type of joining method?

Nailing is not considered a joining method in the same technical context as brazing, soldering, and welding. While nailing is indeed a common method for fastening materials together, it is primarily a mechanical fastening technique that does not create a permanent bond at a material level.

On the other hand, brazing, soldering, and welding are processes that involve the melting of metals or alloys to create a strong, permanent bond between two or more components. Brazing uses a filler metal that melts above 450°C but below the melting point of the base metals, allowing them to remain intact while the filler metal binds them. Soldering involves a similar process but generally occurs at lower temperatures, using a low-melting-point alloy, most often in electronics. Welding, meanwhile, fuses two pieces of material together by melting their edges, often with the addition of filler material.

Thus, while nailing is an effective method for joining materials in construction and furniture making, it does not fall under the same category of joining methods as brazing, soldering, and welding, all of which involve fusion and metallurgical bonding.