lol@ "draw the electrical system". That's the most ridiculous thing that goes on during oral checkrides IMO. I'll never ask anyone to do it. If someone wants to do it to prove they know the system, then go for it, but it's a ridiculous test and most people often don't understand the theories behind the components, just some wire diagram and (usually wrong) direction of current flow (which doesn't really flow anyways). Honestly, my opinion of that airline drops when I hear that's one of the interview "questions".