Pre trip is not easy during the test. Practice and know where everything is and what it does
Roaddog beat me to it. Not assuming whether or not you're a 'gearhead', but I encourage you to take the pre-trip very, very seriously. In addition to needing to be proficient for your practical test, you will need it every day of your driving career. Get to know every little detail about the truck you drive; whether it's a fleet owner's or your own. Knowing how things are or should be will save you tons of aggravation in failing, or about-to-fail parts. Know your profession....be a student of your trade. Your constant questions are indicative of your desire to keep learning. Never, ever quit that. Be professional in your approach to every facet of your business, and you will be rewarded in more ways than one.
My darling wife, who could barely tell the difference between an engine and a transmission when we first started, makes out our maintenance reports required by FedEx, and also knows when things need attention for maintenance scheduling, or when things are breaking. She has come a long way, and you will, as well.
On a side note, my bride is Puerto Rican, and is famous for butchering two languages (Zorry might just have an idea of what I'm referring to). Tests do not come easy to her, as we both believe she may suffer from dyslexia. During our truck driving school, she would fall asleep at night with her pre-trip guide in her hand. On test day, she identified the bar that connects the steering pitman arm to the tie rod as a "drag queen" (it's a drag link). After the testing person got done laughing, he passed her.
