The Passing Zone is EXCELLENT. It is the most cost efficient and problaby the most expertise. You just must use it properly.
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My story - I have a BSChE from the Technion, Israel Institute of Technology and I practice civil engineering. About 16 years after my degree, I took and passed the EIT, first try, with a 90 using the PPI2PASS.COM materials. Then I took a 6 month break and studied another 6 months and passed my Civil PE Water Resources, 1st try, with an 89 due to the Passing Zone and other materials from that site.
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How to use to Passing Zone for Civil Engineers - You must buy the current CERM & the solutions manual. You also must be able to keep up with the pace - begin your studying early and plan to solve every problem in 4 out of 5 Civil disciplines. (One discpline will be your sacrifice discipline, in this one you will only study the basic concepts for the morning exam.) You may only ask questions on the topic being studied until the last two weeks of the Passing Zone when there are open questions. I found this to be GREAT, my biggest problem was reading too much in to the questions, which the teachers alerted me to this issue.(Then I had a mantra - "When in doubt, take the easy way out")
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There are many FAQ's for the exam at the PPI site - READ THEM. I took a pillow for my butt and followed their advice about tabbing, making a 1" study guide, downloading the Erata, etc.
READ THE WHOLE CERM, ESPECIALLY EXAM ADVICE AND LEARN ALL THE APPENDICES AND THE USE OF ALL TABLES/CHARTS.
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I took maybe 25 books to the exam, but I only used three - CERM, the NCEES practice test (~25% of this test will be on the exam) and my 1" (3) ring study guide with all the units conversions on the front/back cover for easy access. I looked at some other books during, but none were really useful.
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Best of Luck! STUDY HARD & WELL!
Clifford H Laubstein
FL PE 58662