Exam Question

### (a) Types of Welds Made in Arc Welding Process and Their Use
A 'weld' refers to the specific geometrical configuration of a joint between two or more parts. These joints are created using various arc welding processes. The fundamental types of welds (joints) are:
1. **Butt Weld:** Used to join two pieces of metal in the same plane, end-to-end. Different preparations (e.g., Square, V, Double-V, U-groove) are used based on material thickness to ensure full penetration.
* **Use:** Critical for applications requiring high strength and smooth surfaces, such as pressure vessel shells, pipeline construction, and shell plating joints in shipbuilding. Submerged Arc Welding (SAW) is commonly used for thick plate butt welds.