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Like I've done everyday for weeks typed my name into the directory only to see the same two unfamiliar names pop up. Not today! :party-smiley-048: Today there was a third, and this I recognized as my own. Although I've done it again no less than 10 times expecting it to NOT be there...it...

Am I missing something here or is this a typo in 2.11? They show the Zbase as 13.4=1pu. This is a 3 phase wye so I line = I phase= 16.6 amps, Z is given per phase 8.4 ohms Every formula I use (and I prefer Graingers kV L-L ^2 x 1000/ base kVA3 phase) I get 7.74 .22^2 x 1000/6.25=7.74 EERM...

I know with only 46 days left this may or may not be of any value. But looking through my files I forgot I had done this and thought Id share. Maybe there's some value in it. Just my understanding of the scoring. All these came from another thread, since all I did was Power (sorry ECC guys)...

Can someone explain how to get the net difference for the Poles (4) and Zeros (2) in the Transfer Function. I'm missing the 2nd zero and 4th pole. (I guess with 1 and 3 I'd get 2 and the same -40dB/decade...but 100s (s+1) (s+2)(s+3)(s+4)^2 thanks Benbo for the other solution. John

Hey guys, I realize this isn't likely to be a simple answer (well I mean "algebraically" is the answer but wont help), but can someone give me an idea how to get from initial equation for Z(s) to the final form for T(s) in the attached example from the EERM. Hope I'm not violating any...

Hey all Been lurking in the wings licking wounds and hadn't been all that eager to post, also didn't want to raining on anyones parade. With that, let me first offer my sincerest congratulations to all my October EBmates on passing WTG! Not fairing as well, I have a much greater appreciation...

Hope you guys can find some use for this. I have a couple binders and place this in the front sleeve. John

Dammit I should have this down by now. But I was thrown by 138 turns ratio where they 28kv/sqrt3 to 115Kv whereas in 518 they dont. Looking at Grainger and another machines book I dont get why 138 was done that way, unless its the three single phase xfmrs, but its represent as 3 phase. John

I dont understand why "since Beta is 100" Ie is approx equal 2mA (which is equal Ic) John

Simple series circuit with a voltage source v(t)=(169.7) sin 377t in series with an open switch t=0ms and a 50 micro Farad Cap. An electric switch closes in 0ms and opens in 6Pi ms in the circuit shown. What is the total charge on the Cap The lines for the solutions q=Cv =(50x10^-6) x...

Question 158 States What is the Characteristic impedance of a high freq trans line with Zl =.85 ohms/mile and Yl =7.00 z10^-6 S/m. The answer 348 Ohms Solution Zo= Sqrt of Zl/Yl so They show Sqrt of .85 ohms/m divided by (7.000 X10^-6S/m)(1 x1/ohm/S) I took the reciprocal os Siemens to get...

Can someone explain why their formula page 73, for VR=Vfl-Vnl/Vnl, is opposite the EERM 40.11 which is Vnl-Vfl/Vfl? john

Man I give up this should be a no brainer. Why isn't this current of 75.93 Amps (multiplied by the Turns Ratio of 10) on the WYE side then multiplied by Sqrt 3 on the Delta side? Is it normal to feel like you'll just never make it 26 days out? John

I guess this seems simple enough the way NCEES presents it as simple OHMs law. My confusion, Line versus System Impedance, hopefully a simple explanation of terminology. I haven't looked much at Transmission lines yet its next on my list. I understood the Line impedances of 16.75/_ 81 Ohms and...

The one thing I thought I knew and was comfortable with was the NEC. I might still contend that, but wonder what you all think. If you have the Kaplan Sample exam see problems 1.22-1.26, or more specifically the solutions. If you don’t have it, in brief, a building service has computed load...

Okay this is probably more a gripe than anything else. I just got the Kaplan Sample exam yesterday, I like the way it appears to work problems. But the first power problem seems wrought with errors, minor yes but still. Comparing the Solutions to the problem they all the sudden decided to...

For those not having it handy: An Si diode used as a 1/2 wave rectifier and is drawn in series with a 220VAC source. The 220 VAC Source in parallel with a 50 microfarad Cap The cap is drawn after the Diode. The minimum PIV (V) rating necessary to avoid reverse breakdown is most nearly...

Hi all, Okay looking at problems 134 and 135. I was able to solve these easy enough. My question...is there a reason why they solved it two different approaches in the Solutions? Understanding leading, lagging, power triangle. neg vs pos, I used the general few formulas... P=(V)(I)(pf)...

Has anyone actually had to use this on the exam? The calculator is fine for simultaneous equations with 2 or 3 unknowns. But what about for phasor? For example if you have the following 2 equations 11.59/_15(I1) + 6/_210(I2)=208/_240 6/_210(I1)+10.91/_36.8(I2)=208/_0 I1=23.3/_261 and...

Just a general question is an much as it can be. Ive posted (this board and the other) and read posts about "math" in general. Consensus always seemed to be not to get too caught up in it. Starting Transients, and well as I am sure you are aware it appears very involved and complex. My...