I recently attended to the non aviation aptitude tests and what u can expect is just the common psichometric test, 4 parts plenty of numerical (not too difficult and reasonable time), then the sequences of 4 pictures and u gotta guess the next, then comes mechanical (ex: a system consisting of 3 gears with one of them given a cw o ccw movement and u must determine the way the last one will spin...) basicaly phisics grafical exercises and the last part the spatial (they show u a given geometric form in flat paper and then 4 possible views of the..say a cube and you choose the only one correct
After these 30 min coffee break and finally the personality questionaire, some 190 questions like 'I prefer stay at home and do some work on my own' or 'You cannot trust anyone cause they'll always deceive you' or sort of... The last 10 or 12 qs are verbal reasoning which weren't too hard neither (...even for me; a non english native)
The whole session was conducted by a friendly HR person, nice and easy going morning...
Results are ready in a week or so and if succesful they contact u quite in a short time for an interview...
Don't know what's next as haven't got any further (yet, I hope...)
I hope this helps, good luck!