Five self-study hydraulic safety training modules allow students to select the specific topic most critical to them. Students may progress at their own pace and review information as often as needed to assure understanding. Includes in-depth video, workbook and test. The five hydraulic basics training modules are: Principles of Hydraulics, Pumps, Valves (Control), Cylinders and Hydraulic Motors, Hydraulic Circuits & Symbols. (28 minutes).