WEL 141January 10, 2018/in WEL - Welding Open 2018 Spring W MAIN /by wpmaster141 WEL 141 WELDER QUALIFICATION TESTS I-II (3 CR.) Studies techniques and practices of testing welded joints through destructive and non-destructive testing. Part I of II. Lecture 2 hours. Laboratory 3-6 hours. Total 5-8 hours per week.