The questions that are thrown in to phase you are normally in the group discussion. Who is your hero? What is the greatest invention ever? Its the kind of thing that you can't really prepare for, just hope you have a quick enough mind on the spot.
I'd say some of the stuff on role of the Commands, RAF motto etc are good if you know them but have never heard of someone asked them. Also, you missed off IOT structure which you should know inside out.