I think Aeromar is right. To be made a part of this sheme would be like winning the lottery in the first place since the odds are already 130:1 of getting in (provided everybody is equally competent)- so why make your odds any worse. I think giving ANYTHING away will give people an advantage in that their confidence will be higher, they'll have more relaxed body language, especially if they know something like the format of the tests. Yes, we are all 'friends' here on pprune though it's plainly obvious that people would like to gain an advantage by knowing what's coming- otherwise you wouldn't be asking about it.
So, as far as tipping people off- The first test involves herding chickens into a pen and the top ten fastest herders compete in a cook-off to make the best tiramisu. All followed by disco dancing. That's the best you'll get off me.