Final answer:
Welded joints can be referred to by several terms based on the specific type of weld. 'Butt welds' are a common type used for joining two pieces of metal along one plane and are the correct answer among the given options.
Step-by-step explanation:
Welded joints can be classified into several types based on their design and application. Among the options provided:
- B. Butt welds are where two pieces of metal are joined along a single plane by welding their ends or edges. This is a common type of weld used in piping systems and structural connections.
- A. Socket welds involve inserting one piece of pipe into a recess on another piece and then welding around the top. They are used for smaller pipe diameters.
- C. Flange welds are used to attach flanges to pipes, valves, or other equipment, creating a connection that can be easily assembled and disassembled.
- D. Threaded welds is not a standard term in welding, and threads are usually not welded because the process would damage the threads.
So, welded joints can also be called butt welds when referring to the type of joint created by welding two flat surfaces together edge-to-edge.