I don't really know. There were lots of trick cyclist exams when joining, but after that you had no involvement with them.
I doubt that panicky people try to join the military, and in any event the training system will weed them out. It's as much a culling system as it is training. Keeping out those who shouldn't be there is as much an aim as training those who should.
Study will get you past exams. It's only a part of flights and sim work, and all of the components have to be present (airmanship, flying ability, etc).
