Here's a copy of the rules. If you have it on your phone it's searchable by text, so if someone says you need "Ball joints" and you wonder, what's a ball joint, you can search the pdf right there in the store and see if they're legit or not.

Some common misconceptions:

Not all oil leaks fail inspection. They only do if if it leaks “petroleum” fluid in an amount or in such a location as to constitute a fire hazard.

Not all rust holes fail inspection. They only do if the hole could allow exhaust fumes into the passenger compartment, or if a fender doesn't "fender" properly. You can have a hole in a pickup truck bed.

The contact info for the state police is on the cover of the book. Get, in writing, the list of stuff you fail for and feel free to give them a ring if you feel like something's up.