Jump to content
Engineer Boards

All Activity

This stream auto-updates     

  1. Today
  2. Voltage drop equation confusion

    Thank you for the reply! I understood the phasor diagrams but the one question that remains is , how do you know if the load is capacitive or inductive in the mentioned problem? I do not see any info on type of load.
  3. funny pic thread

    ^^^ Looks like someone is upset they just got passed by a bucket truck...
  4. Last thing watched on netflix..................

    Not really. They definitely don't hurt if you're adult enough to ride a Harley...
  5. Last thing watched on netflix..................

    I don't know about that. Don't they hurt?
  6. Last thing watched on netflix..................

    And a tattoo perhaps? Might have to sell one of the kids though for the cost of a Harley.
  7. Last thing watched on netflix..................

    I've been binge watching Son's of Anarchy. I'm thinking about buying a harley now too.
  8. Random Topics 3.1

    Hmm...so soy bacon is not all it's cracked up to be.....
  9. Yesterday
  10. My Experience With the Power PE Exam

    Agreed! The handbook is all I used too.
  11. Stuff to bring to test

    If you change your mind and do some kind of crate or container, make sure you pack a blanket in case it rains. For my 1st attempt Im lucky I had 1 of my daughters blankets in the car to cover my references.
  12. Stuff to bring to test

    You guys are great! Thank you for the actual helpful answers, and for the laughs at the clearly sarcastic as well! lol I'll plan on bringing my references in my backpack.
  13. Movie thread

    I just saw downsizing. (Not my choice) It looked like it may be interesting though so I wasn't opposed. I found it boring. I fell asleep and missed the ending. I was on the road for most of Thursday so that may have contributed. My favorite character wasn't the protagonist or his love interest, it was the obnoxious upstairs neighbor because that's how I felt watching it.
  14. Voltage drop equation confusion

    The Theta is power factor of the load. It does not have anything to do with Z of Line feeder. So be careful. The formula is for inductive line and inductive load. Theta is positive for lagging load and negative for leading load. In the question given load is capacitive, (leading) so take theta negative. Try to derive the formula yourself by drawing phasor diagram. You will find a good discussion on the subject including phasor diagrams by members including me here in the forum. If you do not get it, let me know , I will draw again for benefit of all.
  15. CA Specific Exams

    I'm not waiting for Civil, so my long wait is not an independent case.
  16. We did Jessica Jones after Daredevil, then Luke Cage. Jessica was alright, but Cage has been more fun. Punisher was the best, though. They're all linked together to some degree, so that's why we are watching them. They all come together in The Defenders, I guess.
  17. PE Environmental Engineering Books For Sale

    Interested - how do I contact you?
  18. How I Passed the Thermal / Fluid PE exam

    @Vel2018 please feel free to message me any questions on the Engineering Pro Guides Technical Study Guide for Thermal & Fluids. There are some practice problems in this book but as stated earlier by another on this forum, the problems aren't meant to be of exam level difficulty. The problems are only meant to help you practice the key concepts and skills covered in the technical study guide.
  19. Last week
  20. Voltage drop equation confusion

    There is a question on the CI tests question 48: Why is there a negative sign in the formula? and XL is inductive!
  21. Voltage drop equation confusion

    Hi Reema The key to remember is that voltage drop is just the voltage across the line impedance connecting the source to the load (unless you are calculating the percent voltage drop instead of the voltage). For example, the equation you wrote: I*L/1000[ R*cos(theta) + X*sin(theta)] Is really just Ohm's law solving for the voltage across the conductor impedance depending on the total line current: V = (I)•(Z) Where: Z = (L)•(Conductor Impedance in ohms) To answer the specific question you asked: "I am confused on when to use the plus or minus sign in between the resistance and reactance?" This depends on the type of load. Sine the load in question in the conductor connecting the source to the load, the sign will almost always be positive since conductors tend to be more inductive than they are capacitive. This means that the sign between the resistive and reactive term will be a plus sign in the form of: Z per 1,000 ft = (R per 1,000ft + jX per 1,000ft) Where R is the AC resistance of the conductor And X is the reactance of the conductor.
  22. NFL 2017

    Is that why he's listed as Questionable? DUUUVAAALLL
  23. RIP VTE

    damn.... will raise a few to you tonight!
  24. RIP VTE

    RIP VTE. Happy 38th.
  25. Kids of EB

    that's funny!!! never gonna happen
  26. How I Passed the Thermal / Fluid PE exam

    Thank you! I will stick to MERM13th and the companion practice problem, SMS, NCEES Practice Test and if I have more time, probably do the 5th book by J. Hanson. Another question though, the HVAC part of MERM 13th edition covers Psychrometrics, Cooling Towers, Ventilation, Cooling&Heat Loads, Fans Duct Work, AC Controls. The only subject that were on the new exam spec were the Psychrometrics and Cooling Towers; is it safe to say this? Hope there's someone here who took the TFS exam based on the new exam specs so to get more enlightenment on this. Cooling/Heating(capacity, load, cycles)--->Isn't this the Refrigeration part of the Power Cycle Chapter?
  27. funny pic thread

    not sure why someone would put forth the time and effort to put this on their work vehicle, but I got a chuckle out of it
  1. Load more activity