Final answer:
For welding 1/8" mild steel, torch tip sizes 0, 1, or 2 and welding rods of 3/32" or 1/8" are typically recommended, with the exact choice depending on the welding task and personal preference.
Step-by-step explanation:
For welding 1/8" (3.2 mm) mild steel, a commonly suggested oxy-acetylene torch tip size would be around a number 0, 1, or 2, depending on the manufacturer and the specific application. As for the welding rod, a 3/32" (2.4 mm) or 1/8" (3.2 mm) electrode is typically recommended. The selection ranges as various factors such as the precise nature of the welding task and personal preference can influence the appropriate sizes to use. It's crucial to match the torch tip and welding rod size to ensure a high-quality weld and to maintain safety during the welding process.