u/Dormfridge

Hey guys, I have an interview with a local company on Wednesday for a helper position and I was wondering what kind of questions they're going to ask me, I don't know much about hvac, I have my epa608 universal card and some trade school and I have a small understanding of the refrigeration cycle, but I still don't know very much and I'm worried I'm not going to be able to answer the questions they ask me in the interview. I'm nervous and excited to start working and learning this trade. Any advice?