NAT exam?

Hello I am a sophomore in college and I recently just decided to get into the nursing program. I have a couple pre-reqs to go but as I was looking through the curriculum I noticed I had to take PSB-NAT. I could not find much information online. I am currently going to FSCJ. I was wondering if anyone could tell me what is on the test ... and how does the grading go.. what is a good score what is a bad score.... can you use a calculator?