welcome to the forum.
when I took my c-36 for california, which is UPC, we had drawings for sizing gas, water, and waste and vent.
They would ask you only certain fitting and pipe sizes, but to get those, you would have to size pretty much the whole system.
Those were about the only drawings on the test. There were blue print questions, but mostly identification and symbol questions.
I don't remember there being any blue prints or anything like that, only the drawings for the sizing which I mentioned above.
Good Luck! Glad your doing the right thing and getting a license.