The two guys I took ASA104 with, BOTH came about 2-3 questions away from failing the test... That's not a reflection of the instructors either, the teaching was 1st class.
We were given study guides that equated to: "if you can read this, you can pass the test", and yet some people still have a hard time passing... I think it's partly due to language gaps, learning
to sail "on paper" is hugely dependent on memorizing the lingo. Most people can grasp the concepts just fine...
Even so, I wonder how many ASA schools are passing people that shouldn't be passed, just to keep everybody happy. I suspect the failure rate for the test is
low mainly because the Schools have a vested interest in making sure their students pass.
Anyway...I can understand wanting a practice test, most testing situations have some form of practice test. The review questions are as close as you'll get though, unless your instructors give you a study guide. Just learn the material and do your best. You'll probably pass