When I did my oral boards it was more hypothetical than anything else. Questions about why you want to work for CSPD specifically, what you would do if you caught another officer committing a felony on duty, what would you do if you caught a family member committing a misdemeanor (questions are more specific, but I don't want to give them verbatim). They score your questions based on your answers, and it's not black and white. Make your decision and state your reasoning.
They psych test was just the MMPI 2, and then you talk about it with the psychologist (for example, I chose the exact wrong answer on a question but it was because I didn't know what 'raw deal' meant) and he decides if your test results are accurate or can be adjusted.
Prepare for the your investigator to tear your life apart. If you are human, you will have mistakes in your past. They want you to be honest, explain them, and why that is not who you are now...etc . Most importantly do not ever hide anything from the investigator, they WILL find it. My investigator managed to tracked down some of my patient dispatches from being a medic that resulted in court cases(child abuse and domestic violence cases), and then interviewed my Lt and the medical Lt about them. I thought those were protected by HIPPA, apparently not.
Good luck, and if you don't get in you can apply again (unless they've changed that). If you want it and you can show what you've changed on the second round, they love that.
Also, CSFD is looking to get some funding to hire a bunch of firefighters, you can always join our family!