When we went through inspections, we had answers ready ahead of time. We were also ready to point out redundant safety features where necessary on our bot, and also had force calculations necessary to prove that 3/16" thick honeycombed fiberglass that's 5" wide is indeed structurally sound for a bumper support with our frame setup.
Then we got a particularly friendly inspector who's been in FIRST for 10+ years, who went through a myriad of questions with us like a blur. Some questions he posed directly to the students, some he didn't care who answered. Then he saw a $3.8333333 price per unit on our BoM and was like whoa!
so that took some explaining since it was for one of the fiberglass panels, price per sq ft. 4 of our bumpers were
exactly 6" of plywood, and he questioned the students about it but didn't force us to measure. We were ready to measure if he did though.
In a previous year, we had a different experience ... there was a single item missing from the BoM due to an oversight on a repair between Philly & Atlanta. We weren't passed in inspection until the inspector went over the
entire BoM and robot, looking to make sure everything was there.
So the reality, I think it boils down to how rushed the inspector feels, how detailed they are, and how they pose each question vs how teams answer it. Experience helps with the latter two.