I'm not teaching anything just trying to help a guy out. If he has never been around a truck there are videos that can help with identifying certain parts and lingo to help with the pre trip.
Please refrain from posting here. On any given day there are 10's of trucks available as practice tools and CDL instructors. Prime has a prescribed routine for students to use that is approved by the state of Missouri, as well as instructional videos based on Prime's equipment. Although well intentioned, I believe you're managing to confuse some folks. Thanks for your input.