If selected to participate in the pre-employment testing process with Chevron, you will be required to take the following battery of STANG timed tests: Craft Specific Aptitude Assessment: Measures the ability to read, understand, and use information in graphs, charts, tables, and written passages to solve problems and apply general craft knowledge and principles to understand and implement solutions to various situations. An Experienced Refinery Instrumentation Mechanic plays a key role in a wide variety of instrumentation maintenance tasks such as installation, preventive maintenance, calibration, testing, troubleshooting, and repairing of process control and analytical equipment in a large industrial facility.