A dive into welder qualification and some of the variables that affect welder qualification for the CWI - Certified Welding Inspector review course. Parallel to the material in the AWS CWI course. Certified Welding Inspector -This CWI Prep Course was built to help get students prepared for the American Welding Society (AWS) CWI Certification exam. Students can follow the instructor led PowerPoint presentations and work their way through the modules and refresh their knowledge on a number of subjects that will come up on the CWI exam.