I've taken and passed both the Mechanical HVAC and Fire Protection exams. Very different tests. FP is not breadth and depth. just depth. 8 hrs of it. I'm licensed in CO. I currently do HVAC, plumbing, fueling, lubrication, and fire protection engineering. Mostly for Federal projects. What kind of questions do you have about FP? I might be able to help...
FYI - I had to take both exams. Since we do federal work - not exclusively, but close - and most federal projects require that the F/FA/FP/LS sheets be signed by a licensed FPE "by passing the NCEES exam in Fire Protection" - our firm needed an FPE. We have been outsourcing the FP portion of most of our projects and it's been a majory budget killer.
My degree is in Mechanical Engineering Technology. Everything I learned about FP I taught myself. So, the exam was killer. I took it (and failed) in 2013, took it again in 2014 and passed.
Let me know your questions and I'll do my best to answer...