JP11 is correct in saying just admit if you get a question wrong. But I'll add one thing, dig deep for as much information as you possibly can. They do like honesty, but apparently they like to see you try and give an answer to their question. I went with the honesty and just said "I don't know" to one of their questions and it was the wrong thing to do. I found out that they would have liked me to dig a little deeper for information and try to give them an answer. I asked them to repeat the question twice, I could not figure out how to give them the answer from the information they gave me and I thought the best thing to do was to be honest and say "I don't know". Long story short, it was the wrong thing to say. I thought everything else went very well, made some good friends at the interview, had a great sim ride, and was the first one to get the "After further review, we've chosen not to offer you a job" letter.
All this to say, be patient and try to come up with the answer they are looking for if at all possible. I guess this falls into the problem solving category.
Great bunch of guys, great interview experience, but everyone keeps saying if you get the interview you're hired, and I don't think it's true anymore. Study hard, and be prepared for anything. Looks like you have airline experience, and they like that as well. Congrats on the interview,
Good luck