Hey Duelmaster !!!
It certainly helps if you study the damage step chart. Actually, it helps a lot. It's been my experience when administering the test, a lot of people miss those questions when it concerns the damage step...so there's a legal heads-up for you right there.
Read the question carefully, and please, please, please read the card text given to you if you are not a 100% familiar with it. Actually, even if you do know the card in question like the back of your hand, I would still recommend you read it anyway.
I was correcting some tests at SJC Columbus, and there were three capable judges who got questions they knew wrong mainly because they neglected to carefully read the card text/question.
Which leads to my other point: please take your time. There is no time limit. Now the test should not take you more than 2 1/2 hours (and that's pushing it), but everyone tests at their own unique pace. There is nothing holy or special if you finish it within 30 minutes. Actually if you do finish it within 30 minutes, I suggest you double check your answers.
Finally, I will tell you while the test is not easy, neither is it exceedingly difficult. Just relax, take your time, and for goodness sake, please read the questions carefully.
This game needs more sincere judges, and I certainly hope you are taking it in order to be more knowledgeable and effective while you are judging.
Oh, and if you do happen to fail...then it's ok. You can take the test again in 3 months. The main reason I say it's ok to fail, is because we all learn from our mistakes. Make sure the person (I would assume he's a UDE official or another LVL 3 Judge) goes over the questions you get wrong. If you pay attention, you will never get those questions/concepts wrong again (hopefully).
I remember the first time I took the Level 3 test (The god-forsaken first version) I had a score of 58%. I was bummed out, but I learned from my mistakes (and I am now very confident of my ability to navigate the damage step) and I took the test 4 months later and I passed !!!
(Barely passed, truth be told, cuz at the time you needed a 90% and I got exactly that haha)
So, I will wish you the best of luck, and please don't get discouraged just in case you don't do as well as you hoped.
Hope that helps !!!