Ultimate Structural Depth Exam, Paperback by Oakeson, Isaac, ISBN 1539353524, ISBN-13 9781539353522, Brand New, Free shipping in the US The Ultimate Structural Depth Exam is a 40 question practice exam build to test you like the real exam. You also get 40 comprehensive solutions so you can quickly identify your weaknesses and your strengths. You know that practice is the key to passing. This test was built to be as realistic to the actual exam as possible. Give yourself a good practice test before you dive into the real exam to give yourself the best chance to ace this test. We are here to help you on your journey to pass the PE!