What is the broad category name for methods used to join separate pieces of material, including soldering, brazing, welding, riveting, adhesives, threaded fasteners, and self-tapping screws?

• A. Joining methods
• B. Assembly methods
• C. Fabrication methods
• D. Casting methods

Answer: (A)

Joining methods describe techniques used to connect separate pieces to form a single unit. This category includes soldering, brazing, welding, riveting, adhesives, threaded fasteners, and self-tapping screws, all of which establish a bond or physical link between parts, whether permanent or removable. The other terms describe broader or different activities: assembly methods cover putting parts together in general, fabrication methods involve shaping or forming material, and casting methods refer to forming items by pouring material into molds. So, the broad label that best captures the techniques used to join pieces is joining methods.