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  2. Steam Table Metric Units

    Oh yes, did the conversion, its the same. The one I downloaded should suffice. Thanks!
  3. NCEES Power Sample Exam #108

    Your answer is the most right. From the KVA load given, it is clear that the load in inductive ( Both parts positive) and from your answer the phase current lags Voltage; matches perfect. You should not have doubt now.
  4. Steam Table Metric Units

    The saturated tables don’t go beyond 373.95C and 22064 kPa because that is the critical point.
  5. Today
  6. Convert Delta to Wye- PE

    The magnitude of source Voltage never changes by how you connect the transformer to it. It may change across the windings of a transformer depending on its connection.Please show up the question to go ahead.
  7. Steam Table Metric Units

    I was thinking of buying one on amazon this metric steam table by Keenan and Keyes. Its $82.5. But was thinking about if its going to be worth it just for the purpose of using in the exam? I have a Metric steam tables but the Sat. Temperatures only go up to 373celcius, Sat. Pressure only up to 22MPA, the superheat is pretty good though its up to 1000MPA.
  8. NCEES (version 2018) #122

    Can u please show up the question
  9. TFS practice problem of the week...

    LOL well, you know what will really suck? When the exam transitions to closed-book CBT next year. I dunno if the on-screen reference book will have a Mollier diagram, but if it does, just imagine people putting a ruler against the computer monitor... yikes
  10. TFS practice problem of the week...

    Sure!!! Where was this 2 years ago when I was studying for my exam???? BUT NO..... Mike had to use the Black and White one and had to blow it up to 11X17 so his eyes wouldn't cross...
  11. EB Cycling Club

    So are the U-Locks something that is good to have or should I be searching for an alternate bike locking method?
  12. Steam Table question

    @zakbos see the thread linked below for a discussion comparing both approaches
  13. Steam Table question

    I agree only for some particular pressures, and only if you are comfortable using the most 11x17, unless you want waste time flipping that huge paper and folding it back after solving. In some cases mollier chart are faster, but not all the time. Specially if pressures are over 2500psi, I would just go to the tables.
  14. Steam Table question

    The h2 you get from super heated steam tables is the h2' (actual) as the problem given you the actual conditions. Now calculating the theoretical 100% efficiency. You use S1=S2 Then theoretically, the condition of state 2 should be in saturated pressure tables. You would go to saturation pressure of 96psia and calculate the quality. Then you get h2(theoretical). Plug those into equation and you get the isentropic efficiency. If you use Keenan and Keyes tables, you should get h2 theoretical with value 1201.95 and quality should be about 1.0167. Hope this helps.
  15. Steam Table question

    For the exam.. I would only recommend you to use the Mollier diagram. It's faster and everything is right there on one page.
  16. Steam Table question

    Got it, thanks so much Mike. Is there a quantitave method to calculate it or is the chart look up the only method?
  17. Steam Table question

    Your Mollier Diagram.. A71 in the Appendix.
  18. Steam Table question

    @MikeGlass1969 Which chart are you referring to? That value seems to be outside the bounds of the tables(both superheated and saturated at 96psi.)
  19. Steam Table question

    The isentropic is a chart look up.
  20. Steam Table question

    I am working q530 on the 2016 thermal fluids practice exam. The question is asking for the turning efficiency from State 1 to state 2. At state 1, p=900 psia, T=900F. At state 2, P=96 psia, T= 450. I get h1 = 1452, s1=1.6262 and h2(actual) = 1254 from superheated tables. However, the solution lists h2(isentropic) as 1201.24. I do not understand how that number is calculated and there is no detail in the solution. Does anyone know the detail process to calculate that number? Thank you very much for the help!
  21. What does the Fox say?

    "machine"....LOL. You mean the broadband waves that send the Android data to the phone? And as noted above, this is most definitely NOT a Samsung issue. You can thank your illustrious carrier AT&T for this oversight (yet another reason I dropped them many years ago). When I had my GS4 on Verizon, I had no issues getting the latest version of Android. Also, usually, Carrier Store >> Best Buy (or equiv.). I find the level of technical knowledge at these retail stores (Geek Squad included) declining at an exponential rate. So I'm not surprised one bit that they weren't able to assist.
  22. NCEES (version 2018) #122

    I read the solution but I don't understand how to get the "Max Demand at Start of Interval (kW). Please advise. Thanks,
  23. I passed the structural pe exam on October 2017 and i need to give some advices for engineers who are going to take April 2018 exam 1-Focus on the AM portion of the exam, try to minimize your uncorrect answers, start with the areas that you know well first, i started this way (structure, geotechnical, water resource, transportation,construction) . 2-be prepared that you will be surprised from the structural exam (do not get shocked !) 3-Beware that the PM portion is more difficult and you are exhausted from the AM exam, try to begin with the easy questions, first avoid starting with the load path problems from my point of view they are very tricky and waste too much time 4-take all your codes with you, don't miss a single one finally good luck for all exam takers.
  24. Pedestrian Bridge Collapse - Florida International University

    The released part of that voicemail: https://www.cnn.com/2018/03/17/us/florida-miami-bridge-collapse/index.html
  25. There may not be ready reference for these questions answering or explaining specifically. This comes under the subject of circuit theory of EE degree course and you have to make an understanding from there. Let me try to explain if it makes sense. When a system is grounded you have a reference of ground and so you can measure a voltage from ground to any of the phases or between the phases. A man touching a phase conductor with feet on ground will be subjected to phase to ground voltage. A voltmeter too will read the same. Now in such a grounded system the other corner ( another Phase conductor) if grounded will create a fault. Coming to ungrounded system as there is no reference to ground theoretically if a voltmeter is connected between ground and a phase, should not give any reading because one end of the voltmeter is as good as hanging in air. So I can say that a person touching his hand to a phase with feet on ground in a ungrounded system should not get a shock.(Practically because of capacitance between ground and phase makes the Voltmeter read some Voltage and the man should measure the capacitance or confirm with voltmeter before attempting). So first connection to ground is not a fault here and the voltages will remain same as were before touching the ground. Now making another phase connection to ground will create a fault in this case.
  26. ρ vs Ωo

    in Steel Design is this determined by the "AISC Seismic Design Manual". Speaking of moment frame design, Members are designed using 'roo' but connections are designed using 'Omega'. Generally, when it's a critical element (such as connections) overstrength is used. I'm not sure about the concrete design.
  27. What does the Fox say?

    I went to two Best Buys today to try to get my Samsung S5 Active "flashed" to a newer version of Android. The first sent me to the second, the second said they can't do it because their "machine" broke a year ago and corporate never sent them another. They both tried to talk me into a new phone, of course. Fuck Samsung.
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