Read the ryanair interview thread as it has a lot of info on tech questions once you can get through all the BS on it. I found many of the questions that I was asked were along similar lines to what FR were asking. Cold fronts, warm fronts, rvr's, jet engine principles etc. Having said that given your background you might find that they take those sorts of things as a given and will focus more on command decision types of questions and CRM stuff.