Which performance tests are associated with oxy-acetylene welding?

In oxy-acetylene welding, the correct performance tests are related to the positioning of the weld joint during the welding process. The tests typically assess the welder's skill in various positions, which are categorized as flat (1G), horizontal (2G), vertical (5G), and overhead (6G).

The choice indicating 1G, 2G, 5G, and 6G encompasses the relevant positions that a welder would typically encounter when using oxy-acetylene welding techniques. The 1G position represents the flat position where welding is done horizontally on the surface, 2G is the horizontal position where the weld is made on vertical surfaces, 5G refers to vertical welding on tubular structures, and 6G is a challenging position that involves welding at an angle, commonly used in pipe welding.

This comprehensive range of positions is essential for testing the capability of a welder to perform under various conditions, which is critical for ensuring structural integrity in construction and fabrication. Each position presents different challenges and requires distinct techniques, making the selected positions particularly relevant for assessing performance in oxy-acetylene welding applications.