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Zach Stone, P.E.

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Zach Stone, P.E. last won the day on October 12 2019

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About Zach Stone, P.E.

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    Lead Instructor for Electrical PE Review (.com)

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    Electrical Power, Industrial Controls, Field Troubleshooting, Construction Management, Turbo Generators and Power Generation, 24hr Production Facilities
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    Teaching Electrical Engineering

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  1. Keep your head up everyone! Don't forget to take a break when you need to. I highly recommend taking advantage of the extra month or two you have before your CBT exam date compared to the October exam date to deep dive on areas you are most uncomfortable with.
  2. FYI for anyone that hasn't already seen it: First Impressions of the New NCEES® Electrical Power Reference Handbook for the Computer Based Testing (CBT) Exam.
  3. I'm assuming this is the NCEES practice problem where there are two conductors run in parallel because this question comes up often. What is the equivalent resistance of two identical resistors in parallel? if: R1 = R2 = R Then: Req = R//R Req = (R*R)/(R+R) Req = (R*R)/(2R) Req = R/2 The value is halved. The same happens with conductors run in parallel. Each of the NCEES practice exam problems have been discussed to great length on engineer boards with multiple threads. You can find them easily by using the search function instead of making a new threa
  4. The problem is not asking for the output voltage of the half wave rectifier. It's asking for the reverse minimum voltage rating of the diode. The voltage rating of the diode is how much voltage it can be subjected to without failing or becoming damaged. You have to calculate what the maximum voltage is across the diode during the entire period of the input AC voltage signal (from zero to +Vpeak, back to zero, to -Vpeak, and back to zero). In order to use a diode in this circuit, the diode will have to be rated for a "minimum" of this value, meaning as long as the voltage rating
  5. The NEC handbook edition gives some good examples using the magnitude approximation method only (by subtracting magnitudes instead of complex numbers).
  6. This is incorrect. Voltage drop percent by definition in the ratio of the amount dropped across the conductor to the amount supplied by the source.
  7. I would love to. Unfortunately, we are currently in the middle of this semester's live class program while trying to incorporate a lot of changes for the new CBT version of the power PE exam has me really putting in the hours. I've never played before, I'd be happy to take a rain check for anytime after the (now cancelled) Oct 23rd PE exam
  8. Not a bad book at all for the price but it is not as in depth as the Linden handbook.
  9. Never played before, but sounds fun!
  10. Wow this is a big thread 😮
  11. Yes, I contacted NCEES per @Tim @ NCEES's instructions. They said they are working on revising issues.
  12. If you're looking for a breakdown of the phasor diagram relationships these two videos sort it out:
  13. Hi @Tim @ NCEES, I've found a few mistakes in the new NCEES® Power PE Reference Manual for the CBT exam. One of them is a formula mistake with the variable in the wrong place that will result in a wrong answer for anyone that uses it. Who can I can notify at NCEES to help bring this to the right persons attention?
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