Which of the following positions is not included in welding test positions?

In the context of welding test positions, the term "upright" is not commonly recognized as a standard welding position. Generally, the established positions include flat, horizontal, and overhead. The flat position allows for welding on horizontal surfaces, which makes it easier for welders to control the weld pool because gravity works favorably. The horizontal position involves welding along a horizontal seam, which still allows for gravity to aid in maintaining the weld pool. The overhead position, on the other hand, requires the welder to weld from below a horizontal surface, which is more challenging due to the downward pull of gravity on the molten material.

The term "upright" is ambiguous and does not align with the standardized terminology used to describe welding positions in the context of structural welding codes. Thus, since it lacks a defined meaning among the conventional welding positions, the correct answer identifies it as the position not included in welding test positions. Understanding these standard positions is crucial for achieving proficiency in welding practices and ensuring compliance with relevant codes.