mmkk111-
To answer your questions:
1) It's during the brief and debrief (more so during the debrief). The IPs have no set ground training guide, so they just ask away. Hence, you need to be ready for any questions they throw at you. It's kind of standard practice for the IPs to ask a few questions to determine what subject you know the least on and then attack.
2) Like I said, the 12 hours is not one long study session, you have butt loads (STS) of stuff to do. Normally you have two flying events every day (flight, sims, etc) and sometimes three. There are also duty shifts to pull like RSU tours, SDO, door guard, the list goes on. So you actually don't have a whole bunch of free time. If you aren't scheduled during one of the three periods, you generally sit in the flight room and study. However, it's not like the Navy likes to think it is. You actually get very little study time during the day. However, if your class is not on formal release, you are allowed to leave until the next period.
3) Regarding your buddy, I think he's full of it. IMHO, AF training is much harder than Navy training. Went I went to Corpus, I found it ten times easier than Vance. I never missed the structured regimine that's for sure.
PD