Scott,
Some more thoughts.
I concur with "Thirdeye"
1. Yes, use the magnifying glass to measure porosity to nearest 1/64".
2. During the Part B, the practical, base your answers on information within the Part B Book of Specifications even if it seems uncomfortable.
3. From your email, I see you have a lot of API and NDT experience. That is good. For guys with your background, I usually recommend sitting through the D1.1 clinic, even if you are not taking the D1.1 exam. D1.1 is considered the starship of the welding codes and its influence is evident in the Fundamentals (Part A) and Practical (Part B) Exams. In other words, taking the API 1104 Open Code Exam does not completely release you from the clutches of D1.1 Many of the tables and forms in the Part B book of specifications are developed from D1.1. You don't have to study D1.1 with the same intensity as the D1.1 open code candidates will, but getting familiar with prequalified joint details, filler metal selection, preheat, and qualification tables will help.
4. When taking the test, answer the question that is being asked, not the question that you think is being asked. In other words, read the stem of the question carefully. Look at ALL of the multiple choice answers (distractors) offered and select the best answer. The first correct answer is not necessarily the best answer.
5. It is a full day of testing. Two parts of the exam are administered before lunch and the third and final part is administered after lunch. Over the years, I have interviewed many successful and unsuccessful candidates. A common reason for being unsuccessful is that they (well frankly) get cocky on the third part of the exam. The adrenilin is flowing and they are doing pretty good during the first two parts in the morning. Something about that lunch break that causes them to cool off and get out of the zone. After lunch there seems to be a premature celebration-kinda like that football player that started dancing before he made it to the endzone and had the ball stripped away. Seems strange, but many candidates have been unsuccessful for that reason. Treat the lunch break as an adversary and do not allow that period to take you out of your concentration zone. The last question of the third and final part of the exam must be worked with the same care, thought, and intensity as the first question on the first part of the exam. And you will be tired. You want to be at your mental and physical peak on that Saturday. Start thinking about that day now. Get a good night rest the night before. Late night cramming the night before almost always backfires.
6. As "Thirdeye" mentions, you are still permitted to highlight and tab your code book. You are not permitted to use any loose pages or notes (except Code errata sheets). The decision to use/not use tabs and highlights is personal. The correct tab and highlight system is the one that works for you. Some folks tab the heck out of their books and have them all marked up. Others don't. It has been my experience that with 1104, because there are not that many pages involved, most people don't use many tabs. The Table of Contents, List of Tables, and List of Figures work pretty good at getting you to where you need to get. Tabs and highlights can give you confidence, however, even if you don't end up using them that much. It's a personal call. If you think it helps, by all means do it!
(Again, for candidates preparing for the D1.1 exam, it's a different story)
Ken C.