Are you able to elaborate on the theory questions? Would this be the sort of info found in the bak textbook or would it be more general knowledge?
BAK stuff. Think of things like "why is an aerofoil shaped the way it is?"
How many people attended your assessment centre? And how many of those do you think got offers?
Twenty attended. And an additional 20 attended another assessment centre in a different city. Eight were selected.
Is it a presentation about yourself or would you have to study a topic then make a presentation on it?
It is about yourself.