Hello All, This is my first post! I have a question from an exam that I haven't been able to find the answer. The question is about the 4 test positions for pipe welding. And the answer options look something like this: 10, 20, 30, 40 10, 30, 40, 60 10, 20, 50, 60 20, 30, 50, 60 I've looked through...