What is the most difficult part of making an open-root V-groove weld? bead overlap root pass work angle

The most difficult part of making an open-root V-groove weld is the root pass. The root pass is the first layer of weld metal that is deposited on the root of the groove. It is critical to achieve a good root pass because it sets the foundation for the rest of the weld. If the root pass is not properly executed, it can lead to defects such as lack of fusion, incomplete penetration, or excessive spatter, which can compromise the integrity of the entire weld. Therefore, achieving a sound and consistent root pass is considered the most challenging aspect of making an open-root V-groove weld