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Found 57 results

  1. State of the Art Novel InFlowTech 1Gearturbine RotaryTurbo 2Imploturbocompressor One CompressionStep View File Featured Project Development - State of the Art Novel InFlowTech: ·1-Gearturbine RotaryTurbo, ·2-Imploturbocompressor One CompressionStep: |/ *1; Gearturbine Project, Rotary Turbo, Have the similar basic system of the Aeolipile Heron Steam Turbine device from Alexandria 10-70 AD · With Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Way Power Type - Non Waste Looses · 8X/Y Thermodynamic CYCLE Way Steps. 4 Turbos, Higher efficient percent. No blade erosion by sand & very low heat target signature Pat:197187IMPI MX Dic1991 Atypical Motor Engine Type. |/ *2; Imploturbocompressor; Imploducted, One Moving Part System Excellence Design - The InFlow Interaction comes from Macro-Flow and goes to Micro-Flow by Imploducted Implossion - Only One Compression Step; Inflow, Compression and outflow at one simple circular dynamic motion / New Concept. To see a Imploturbocompressor animation, is possible on a simple way, just to check an Hurricane Satellite view, and is the same implo inflow way nature. Submitter retrodynamic Submitted 11/20/2018 Category Civil- Transportation Notes  
  2. Looking over the exam specs at https://ncees.org/wp-content/uploads/Power-April-2018.pdf, I realized the largest section of the exam is the Protection subheading of the T&D category. Protection has 13 of the 80 questions - more even than code lookups, which have 12. I think this category is easy to overlook because you can practice fault current calculations and circuit analysis until your calculator is mad at you, but conceptual questions are often harder to prepare for, and we only have a few days left before Friday the 13th! My suspicion is that the questions in this category are mostly conceptual, so I think it would be great to have a thread about good resources and example problems on this subject. I'll start by listing some concepts we should all be familiar with. Anybody, please chime in with an example problem, concept to know, resource to print out, or whatever you have. : What is the purpose of power system protection? : What are the major categories of power system protective equipment and schemes used in transmission and distribution systems?
  3. Hello Everyone! New here, but giving back to this forum just as it gave something to me. Resources and hope! I recently moved to the from Canada with a few years of experience in my hands after graduating as an Electrical Engineering candidate in the summer of 2013. While I hadn't been out of school for long, I still lost all hope of being in a school/study environment again and was worried about this FE Electrical and Computer CBT based exam. After looking at resources and forums I decided to start my studying. I moved here in April and with wanting to take my PE Power exam in the April of 2017, I decided to dedicate some time this year (2016) to study and try and pass the FE. So I bought the FE Electrical and Computer textbook by Lindeburg on Amazon for 50-ish $ and started studying by the end of July. I followed the schedule it says and tried to do one chapter a day, and sometimes three-four on weekends. Lindeburg suggests that you could start the course 45 days ahead of the exam and complete all 45 chapters without rest days and pass the exam the next day. I think this is pretty accurate since the exam is not very tough. Along with the textbook, I tried to learn where all the units and equations are in the FE Reference book which is the exact same book given to you on the computer in the exam. I also watched Raiya Energy Academy's Youtube videos online and used it for different questions and examples. I also found some online assessments that started a timer and told you how you did. And finally I made sure to really practice with my calculator and use the special functions like complex conversion, matrices, vectors, equation solving, computer numbering formats, and boolean logic. This last part is really important because doing all these in your calculator, saves you time, which gives you more minutes in the end for harder problems or for reviewing. After I was done going through the book, I decided to book the exam three weeks from finishing the book, and spend these weeks looking at the book and the reference manual again, but this time just doing the problems. I am so glad I did the steps above, because after I did the exam on a Friday, I found out I passed online the next Wednesday. Hope this helps you!
  4. These items and more have helped me pass the April 2018 exam. Tabs will be removed prior to shipping. Shipping costs are based on your location. Please PM me for books you are interested in along with your zip code. Discount for multiple items. Electrical Machines, Drives and Power systems 6th edition - Theodore Wildi - $20 Very good, some highlighting Power System Analysis - John Grainger - $20 Good, some highlighting Electric Machinery Fundamentals - Stephen Chapman - $30 Good, some highlighting/hand written notes Engineering Economic Analysis – Donald Newnan - $35 Like new, no markings Spin-up Exams 2nd edition - Cory Lanza - $75 Like new, no markings Tom Henry's 2017 NEC Key word index - $30 Like new, no markings Complex Imaginary Volumes 1 through 4 - $100 Excellent condition, no markings 2017 NCEES practice exam - $35 New, received an extra from my instructor Complex Imaginary Electrical Code Drill Book - $25 Excellent condition, no markings
  5. I want to sell all these books together. Sorry not willing to sell individually. Everything for $350 +$15 shipping. -National Electrical Safety Code (NESC) 2012 By David Marne (Paid $40) -Electrical Machines, Drives and Power Systems By Theodore Wildi (Paid $30) -Power System Analysis By Grainger (Paid $27) -Power Reference Manual Second Edition By John A Camara (Paid $200) -Complex Imaginary Practice Exams (Paid $150) -Complex Imaginary Electrical Code Drill Book (Paid ($30) Thanks, Scott
  6. Hi everyone, This was my second time taking the Power PE exam and I thought the test was harder than last time. I studied for more than 4 months and tried to focus on my weaknesses as much as possible but it didn’t seem to help. I wanna hear from other people’s experiences regarding the past exam, if it was your second time did you feel it was harder or easier? Thank you.
  7. xuechaow

    EE Power PE Materials for sale

    I have PE materials of EE Power to sell. $140 total OBO including shipping. The Electrical Engineer's Guide to Passing The Power PE Exam --- Purchased brand new from Amazon, no markup. PE practice exam --- 2018 April version, no markup Power System Analysis --- some markup Also have electric drives (second edition) for free. If you are interested, please message me. Thank you!
  8. Congratulations on making it through the PE exam! How did the exam go? What was your experience like? I know all the future exam test-takers would love to hear your thoughts on the forum and/or on the survey below. Power Survey: https://goo.gl/forms/AdwaX78voQy1Apli1 Just a friendly reminder, you cannot share the actual exam problems or solutions.
  9. I have decided to place my cheat sheets (word document) on the below link as a free download. Please feel free to download the word documents and customize the documents to suit your needs. You can also upload your own version of your cheat sheet to the google drive in order to share with others. Good luck on the studying and please feel free to email if you have any questions on any other product or if you see an error on the cheat sheets. Link: http://engproguides.com/free-pe-cheat-sheets.html
  10. BirdGrave

    Pinpointing Shortcomings

    Hi all, I'm taking a the exam in April and have been doing my best since last fall to prepare. I'm currently enrolled in the School of PE program, have purchased both of the recent NCEES Power exams, and the complete 4 exam set of Complex Imaginary. My studying has gotten me to the point where I was scoring into the 90% range on the aforementioned tests (I try to do one practice exam per week), and I was feeling pretty good about my progress. That is until this week. I decided to mix it up and try the Engineering Pro Guides Power exam, and I did really badly on it my first time through under simulated testing constraints. Now I'm worried a month away from the exam that my methods have not been correct. I don't feel like I'm memorizing answers on my prior practice tests, as there are so many questions I can't commit them to memory if I tried. But there is an obvious disconnect of some kind, otherwise there wouldn't be such a disparity between the score on my old exams and the new one. Has anyone else had this happen to them in their exam preparation? I worry a month out to that I haven't been employing the correct methodology all this time. If this has happened to you, how did you go about getting back on track?
  11. As you may know, NCEES has changed their Power PE outline. I have outlined the changes below. I think the biggest change is the increase in possible Protection problems from 8 to 13. New NCEES Outline: https://ncees.org/wp-content/uploads/Power-April-2018.pdf 1. Measurement & Instrumentation: Reduced the number of problems from 6 problems to 4 problems. Removed VOM metering and Wattmeters as a subtopic. 2. Applications: Changed topic name from Special Applications to Applications. Same number of problems. Added lighting energy efficiency and grounding as subtopics. 3. Codes and Standards: Increased from 10 problems to 12 problems. Added Hazardous area classification (NFPA 497, 499, 30B) 4. Circuits - Analysis: Same number of problems. Added single phase circuits, DC circuits and single-line diagrams as subtopics. 5. Circuits - Devices & Power Electronic Circuits: Same number of problems. Added converters and ladder logic as subtopics. 6. Induction and Synchronous Machines: Changed topic name from Rotating Machines. Decreased from 10 problems to 8 problems. Added subtopic electrical machine theory and removed subtopic speed-torque characteristics. 7. Electric Power Devices: Changed topic name from Electromagnetic Devices. Added subtopic Capacitors. Increased from 6 to 8 problems. 8. Power System Analysis: Changed topic name by combining two these two separate topics, System Analysis and Power System Performance. Decreased from 16 problems to 11 problems. Moved grounding from this topic to Applications. Removed subtopic load sharing parallel generators or transformers. 9. Protection: Changed from 8 questions to 13 questions. Added more specifics to subtopic protective relaying, which includes differential, distance, undervoltage and pilot.
  12. Good morning all. I received the green "Pass" for my Power PE exam this morning, so I'm ready to release the write-up of my experience. I will reply to this with an attached PDF for those who want a simple 2-page print-out (the site isn't letting me attach it here). Hoping this is a help to you future test-takers! As a side note, I took (for the first time) and passed the FE exam earlier this year. I have a write-up for that in the FE forum. My Therapist Said I Should Do This for Closure (Joking) I did a lot of research before prepping for the Power PE exam, and many of my resource choices came from input of others in this forum. Thanks everyone! For you future Power PE exam takers prepping, here is an overview of my resources, study plans, and experience (don’t worry – no prohibited exam info in here): Resources Custom 4” binder (had this out and used for ~70% of questions on the exam) Printouts from all sections in Electrical PE Review premium course. Handwritten and typed additional notes and formulas Random articles I expected to be useful (including FE Handbook sections) GRAFFEO’s book (out a few times during the exam) 2014 NEC (whichever version applies to your exam is a must-have) PRM (Camara) (used a few times on the exam) 2017 NESC (no brainer, even though it makes up a small percentage of the exam) Electrical Machines and Drives (Wildi) (fantastic book – out a few times during the exam) Power System Analysis and Design (Glover) (may not be the best book, but I used it in school and it has some helpful sequence network, 3-phase analysis, and transmission model information) (out a few times during the exam) Power System Analysis (Grainger) (usually my go-to for power flow and sometimes transmission) NCEES Practice Exam (was helpful for exam prep) CI volumes 2-4 (was helpful for improving exam-style question speed – does not cover all topics) Spin-Up (was somewhat helpful for exam prep – very simplified questions) I took some extra references with me to the exam, but did not include them on the list since I didn’t use them or see them as worthwhile. Study Plans 6 Months Out: Started researching resources and other engineers’ experiences with study prep. I mostly did this on forums and with engineers at work. 4 Months Out Avoided any practice exams. Purchased and went through Graffeo’s book (except exam). Started typing out custom notes/formulas pages broken down by the NCEES “Power Exam Specifications.” I used Graffeo and PRM as my primary sources for this. Hit rotating machinery and realized a class might be a good idea. Previewed some rotating machinery notes from Electrical PE Review (EPR)…decided to go with that as my class. Signed up for the premium class at the end of the month. 3 Months Out Created binder tabs for each section in the EPR course. Pre-printed everything so I could highlight and take notes as I went through the course and videos. This was a good move…by the end of the course, I generally knew right where to go in my custom book for common formulas and question types. I probably made it through the course in ~100 hours (others would be much faster/slower depending on what they intend to get out of it). There are 100’s of pertinent quiz questions and many helpful videos. I feel like I saved weeks of my life by not having to create more formula sheets and not having to run through tons of questions that would not have been pertinent to the exam. 2.5 Months Out Started taking one practice exam per weekend: Complex Imaginary (CI) Graffeo 2 Months Out Took the NCEES Practice Exam…didn’t cry (high 80’s) Fell into a big project at work that consumed most of the rest of the next two weeks Worked Spin-Up problems here-and-there. Tabbed the heck out of my references. 1.5 Months Out Through Test Day Breezed through all the EPR courses again. Started over on the ‘1-practice exam per-weekend’ cycle. Watched and/or participated in the EPR live classes. Printed articles and just tried to patch holes in my knowledge. Test Day Experience Got a hotel room the night before for fear of a flat tire keeping me from making it on time. Packed a lunch the morning of the exam and packed in coffee and a couple of CLIF bars. Got to the exam site 30 minutes before doors opened (I was not the first there). Took the morning section and found it played to my weaknesses. Had most questions done in 3-hours. Spent the remaining time on a few of the harder questions and checking answers. I use the multi-pass testing approach. For me, this means: with exception of NEC questions, do all questions requiring minimal or no look-ups on first time through (~60%); do all NEC questions on second time through (~20%); do hardest questions 3rd/4th time through (~20%). Felt pretty confident on 30/40. I’m guessing I got 75-85% on the morning. Side Note - I recommend not going in dehydrated – plan for one restroom break. It cost me less than 5 minutes. Had lunch in my car and just hung out until the doors opened for the afternoon section. Took the afternoon section and found it played to my strengths. Had most questions done in 3-hours. Spent the remaining time on a couple of harder questions and checking answers. Felt pretty confident on 35/40. I’m guessing I got 80-90% on the afternoon. As I write this, that experience was yesterday…I won’t know if I passed for several weeks. I will say I felt fairly well prepared. For what it is worth, I feel like a better engineer for the study and experience; now I am ready to move on! Hope not to see any of you in six months…then this really is closure! Good luck in the future, everyone.
  13. justin-hawaii

    October 2017 PE Results Survey

    After you receive your results, can you please take a few minutes to fill out a survey? This will help the future PE test takers get an idea on the references used, number of hours spent studying and which topics are difficult/easy. Power October 2017 PE Survey Link: https://goo.gl/forms/XseluKZn7dRvCtQi2
  14. justin-hawaii

    Mechanical & Power PE Results Survey

    After you receive your results, can you please take a few minutes to fill out a survey? This will help the future PE test takers get an idea on the references used, number of hours spent studying, cut score and which topics are difficult/easy. HVAC & Refrigeration October 2017 PE Survey Link: https://goo.gl/forms/lhQCu7Z5r6vyjWje2 Thermal & Fluids October 2017 PE Survey Link: https://goo.gl/forms/VrXYXjwsY5Ycpjv43 Machine Design & Materials October 2017 PE Survey Link: https://goo.gl/forms/gVXyLJ7RkJqzrcZB2 Power October 2017 PE Survey Link: https://goo.gl/forms/XseluKZn7dRvCtQi2
  15. applepieordie

    GMD for more than 3 conductors

    I've seen 2 different equations from 2 different references for finding the GMD for 4 conductors. -one used (D12 x D23 x D13 x D14 x D24 x D34)^(1/4) -the other used (D12 x D23 x D13 x D14 x D24 x D34)^(1/6) i assume one of them is wrong? which one is correct? im leaning towards the 6 root one to be correct, can someone please confirm? what is the general eqn for n number of conductors? i assume nth root of the product of n possible distances. Thanks in advance for help.
  16. applepieordie

    Power Transfer Formula

    Please explain to me why sin(delta2) = (P1/P2)*sin(delta1) I don't understand how it got to that step. can someone please show the steps leading up to how sin(delta2) is determined? Thanks!
  17. applepieordie

    Induction Machine

    Hello, What equation is being used in the solution? (question from Kaplan sample exam) Is max torque synonymous to max power? In Graffeo's book I see the formula: Slip at which Pmax occurs at = Sp = Rrotor/(Rrotor + Zeq), where Zeq = Zmotor + Zstator. But this equation seems slightly different than the one used int he solution. Also, if you have good machine references (such as a formula sheet) to share it would be greatly appreciated. Thanks!
  18. applepieordie

    Vpp vs Vpn

    I often find myself making the mistake of using Vpp rather than Vpn and vice versa. After I see the solution and realized the mistake I made, it seems so obvious from the start that I should have used Vpn. Question 1: are there any techniques or rules to follow to be sure what voltage potential to use and minimize mistakes? or is it just trial and error learning process? I dont want to make such a simple mistake on exam day. Question 2: When converting from Vpp to Vpn I usually follow the formula Vpn = Vpp/(sqrt(3)∠30°). In the example below, the ∠30° is left out of the denominator. Can someone explain to me why? When to include ∠30° and when to exclude? Thanks!
  19. applepieordie

    Graffeo - Single Phase Problem

    Hi, can someone explain to me the whole 'two wires' thing in single phase circuit and why the impedance is 2 times. Thanks in advance
  20. applepieordie

    Graffeo - CT question

    Hi, this is a figure in the 2016 printing of the Graffeo book, page 148. Is there a typo in describing the direction of current above the CT on I2 side? The description is the same before and after the fault...why? I tried checking the errata on Graffeo's website but this page is not mentioned. Thanks in advance!
  21. Hello Everyone! After posting my FE exam prep from October 2016 found here: I decided to go strong and work towards my PE Power. Like I mentioned before, I already had the required 4 years of work experience between both Canada and the US, so I decided to apply for the PE Exam and write it in the coming April 2017. I would say, from talking with coworkers, peers, and just overall looking at all the material available it was really intimidating and overwhelming at first. I was very nervous about this exam from the get-go even after studying for the FE and passing it. Having done the FE just recently should help, is what I kept hearing from everyone, but of course I was finding it hard to connect the dots between the FE and the PE exams. Primarily, because the FE really is very basic level understanding of electrical engineering (First and Second year course material from University) whereas the PE is more like the third and fourth year materials + codebooks. In any case, I didn't have a great plan of studying for this like I did for the FE. With the FE I just took the reference material and followed their plans. With the PE, I asked around at work for what was available, and luckily there were a couple folks that had 5-6 different NCEES PE Power Practice Exam and Camara's booklets that combined had over a 1000 problems. I also printed out the NEC 2017, the NESC 2012, the NFPA 70 2017, the ANSI Device Numbers, and had a copy of the EPRM by John Camara. This last book was what I used to start my prep. Similar to the FE prep, I first went through the EPRM entirely and thoroughly. Then I went through a whole bunch of videos on youtube related to Power problems, notable mention Raiya Energy Academy. Again, while I don't always agree with Raiya's solutions, her problems and walk throughs are worth looking into. She gets the steps right 99 percent of the time, but the answer might be wrong in some cases. She corrects herself in most cases. After I finished the EPRM book, I went through the entire NEC 2017 code book and sticky tabbed most of the important and often used artices, (See Raiya's video on Must Know NEC Articles). I have to admit, you are not going to remember where each article is. So heavily rely on the index pages of these code books in the end of the books. After the NEC, I went through the NESC codebook and the NFPA codebooks fairly quickly in order to get the gist of the materials. The last four weeks before the exam, all I did was problems problems problems. I have to admit, after I did the exam, I had a sense of relief, it was either from finishing a long 9.5 hours day (including breaks) or I was fairly confident in what I had answered were correct. For anyone thinking that there isn't enough time in the exam, if you prepared as much as I did, and I think you should, then you should have enough time to write the exam and still have 45 minutes in the end to check everything. I had finished checking and still left a half an hour earlier. Total time taken to study: Once I passed the FE, and got my approval that I had been registered for the PE exam in February, I started studying Mid February. From Mid-Feb to April 19th, I spent 8 weeks studying. Weekends were the busiest (6-8 hours each day) and then 3-4 weeknights of one hour each. Prep Prep Prep, is all I can say. I can usually gauge whether or not one would need to study as much or not for a certain exam, however, both before and even after writing the PE exam, I have to say you must put in your hours to study. It is not that hard, but it is not trivial. So I passed, and the results came out exactly 1 Month and 5 days later. Good luck to Oct 2017s and future PEs.
  22. Warriors never break

    Yellow fellow engineers!

    I guess I forgot to introduce myself on my first day here (the day I found out my dream of becoming a PE is shattered and postponed to another 6 months... the day of to be or not to be... the day of green or red... the day of passed or fail... the day of tears or tears (this time from joy)... I am a power electrical engineer and will be taking The Power PE in October for the second time. I've found this forum really helpful for both study and emotional support. I hope I can contribute and support others as well the same way I get help and support. thank you, A warrior from Cali
  23. Warriors never break

    Failing Score on Power PE

    Failed 48/80 first time taker. 48 correct questions out of 80. please share your failing score and if you passed your advice and strategy! Thank you.
  24. amats42

    6MS TFS, Problem #67

    I am working the 6 minute solutions problem 67 and I was wondering how they derived the equation for power. I knew to use the isentropic equation with P=mdot*work. I canceled out the densities and almost ended up with their equation. Pth = (k/k-1)*Q1*p1*[(p2/p1)^k-1/k - 1] I don't really need help with the solution method, I just need to understand how they got k/(k-1) as part of the isentropic work equation. MERM 24.118 shows it as 1/(k-1). A previous post said to derive it, but I still wouldn't get k/(k-1) If someone needs I can post a photo tomorrow, but again I just need to know what isentropic equation to use.
  25. applepieordie

    Help: Graffeo Ex. 10

    Can someone please explain to me ex.10 in the graffeo EE guide to passing the power PE book? I don't understand how to get 22.78 49.4 degress from Zld = 35(j30)/(35+j30)