ALL ATP's narrowed the test bank down to the 500 questions (or so) of the most commonly asked questions on the ATP/w. (Some computer nerd with too much time on his hand figured out the algorithm of the FAA computer test bank, basically) They then made their own CBT program out of this.
When you go in for your study session, they should give you a "cheat sheet" with tips on how to answer questions.
Example: In this question, if these key words, "xxx, xxx, and xxx" are in the question, the answer is "C"
...stuff like that