This might sound strange ---> But, for the angle ranking section, i thought of all of the angles as car seats... So picture urself trying to fit into the angle; if u were sitting in it... and out of all the other options it seemed to be the least comfortable, then that one will be the first one on the multiple choice list (and so on, and so on... so the one that looks like a nice relaxing beach chair would be last on the list). I don't know, this kinda helped me out.
For the really tough options, just trust ur gut and go with it. When u become a dentist and ur working at the chair... i think in the end ur just gonna have to trust urself, make a decisions & go with it. Hope this helps, i'm not a dentist (i did score in the 93% on the PAT)... so just take what i said with a major grain of salt. 🙂 😉 🙂