**Description:** Determines nature and extent of damage, operational defects or wear by making routine, periodic or special inspections on such machine accessories, portable tools, equipment and attachments as pressure gauges and regulators, automatic die heads, tapping heads, hand routers, electric sanders, skill saws, portable piston type squeezers, portable high pressure pumps, welding valves and regulators; hydraulically, electrically or pneumatically powered portable tools such as drills, nut runners, power screwdrivers, and nibblers; determines methods and sequence of operations, services, repairs and functionally tests these tools and equipment working to shop practice and procedure, manufacturers’ drawings, specifications and catalogues, shop orders, oral and written instructions and other authorized information; performs such typical operations as disassembling unit, repairing or replacing defective or worn parts such as shafts, bushings, pistons, valves, bearings, gears, arma...