Is there a website that shows diagrams of a big-rig and all of it's parts? it's for a c.d.l. test?

first hand knowledge is only the best, driving school for cdl would be hands on knowledge.

Is there a website that shows diagrams of a big-rig and all of it's parts? it's for a c.d.l. test?
You should be able to get a CDL driver's manual from your local division of motor vehicles. It will have all the information you need to take the test for your CDL learner's license. The manual will also have information on the tests for


CDL license endorsements.