I have an ACE certification, and I thought the test was a complete joke.
Questions like:
'What is a concentric action?'
'What is a lacto-ovo vegetarian?'
'You see someone bench pressing in the gym and they are bouncing the bar off their chest, what do you do?
'One of your female clients mentions to you that she thinks another personal trainer at the club is good looking and is interested in dating him, what do you do?'
Knowing what a lacto-ovo vegetarian or concentric actions are has nothing at all to do w/ personal training. And the other questions for their ethics part that are opinionated and have no right or wrong answer but are scored quantitatively sure are ethical 
The test was designed basically so that someone 5 foot tall and 400lbs who has never set foot inside a gym could study a bunch of terms and pass the test and be a CPT, despite not having a clue what a military press is, or what happens when you move your hands close together when doing a flat bench press.
Granted these are some basic questions, some are difficult some are easy, BUT i want you to answer WHY these questions are not relavant to personal training. Is it because you studied the answer and concluded they were easy answers to remember OR is it because you don't know the "when, why or whats" of the questions themselves?
Did you get your cert just to become a "rep counter" or to actually help people? If you got it just for some extra money and just to be rep counter, then you don't need to know much more than just the test answer it self, but if you are doing as a business to make a living from then I suggest you find out WHY you need to know this stuff.
If people on this site bothered to do some research on the PT business, they would find that it goes faaaaaaaaaaar beyond than what they make it out to be. Professional organizations, case study research journals, workshops, conventions, I can go on forever. I have 4 certs that I constantly have to keep up on because most if not all certs require you to do a certain amount of CEU's (continuing education units) each year.