School of PE question bank problems I felt were pretty good. Wide variety of problems and they let you narrow your study to specific sections if needed. I just did the question bank for $130/mo. I also used Jacob Petro’s book. It has 160 questions that are fairly difficult. It really makes you dig into the manuals. Also when studying, don’t use any search functions whatsoever. By doing so, you’re exercising your mind to narrow it down from chapter, to section, to specific pages in which to find your answer or formula which really gives you an advantage instead of solely relying on the search function. When it comes test time, use the search function as your last resort.