Search results

I am in texas and I saw the spreadsheet indicated the date with "website" and just wondering is that the texas board of professional engineers website? I assume just look up from PE search? I am getting nervous :(

Last Friday was a rough day. I hope everyone did well. What is the % passing rate? Anyway, I was wondering what's after getting a PE? Anyone has any thoughts on the RCDD certification?

Both questions involve with diodes but one used square root of 2 and the other used 2*square root of 2? Why?

The question is "find the per-phase capacitance needed to change the power factor to 1.0." I'm too lazy to post up the entire solution, but basically the total 3-phase reactive power needed to correct power factor to 1 is 57.8kVAR. The solution then divide it by 3 since we are looking for per...

I have a little trouble finding the current in a given synchronous machine. I always get the angle value wrong. See below examples. solution used Eo=13.16<20deg and E=11<0deg solution used Eo=1790<-30deg and E=2300<0deg. How do you know which angle is which?

1. Several references that I read stated that the starting current of a motor is 6 times the rated current. However, I have seen several sample question asked to find the starting current of the motor and they just calculate the current, I=S/(1.73*V). Don't you also need to multiply by 6 after...

I understand the 13.8kV base in G2 which is 140k/14k = 138k/Vbase solve for Vbase = 13.8kV I don't understand where they get 9.959kV base for G1. We are dealing with base value which we don't need to consider the square root of 3...at least for G2 they didn't use it.

For a wye connection, is the neutral current, In=Ia+Ib+Ic or Ia+Ib+Ic+In=0

Determine the constant of a three-phase line having the following specifications: conductor 900,000 cir mil ACSR spacing 14ft horizontally *14ft*14ft length L 125 miles frequency 60Hz The table that I have listed three different type for 900,000 cir mil, Baldplate, Canary...

Just wonder what is the typical salary range or % increase going from an EIT to PE.

The book that I used in college seem to use different terminologies than what I've seen on the practice exams. When referring to the induction motors (according to my book): P[conv] = P[AG] - P[rot] P[rot] = s*P[AG} P[conv] = (1-s) * P[AG] where s = slip, P[conv] = power convert, P[AG] =...

Beside the NEC, are there any other code books that I need to take to the exam room? Also, how did you guys bring all of your books to the exam room since no backpacks are allow. Is it ok if I bring a box? Thanks.

A section of a wye-connected 3-phase transmission line has a phase voltage rating of 15kV and a power rating of 30kVA. The per-phase line impedance is 75 ohm. What is the per-unit impedance? solution: Zbase=(15k)^2/30kVA Does the question imply that 30kVA is the phase load or you just always...

NEC 2008 article 110.14(1) states: (a) Termination provisions of equipment for circuits rated 100A or less, or marked for 14 AWG through 1 AWG conductors, shall be used only for one of the following: (1) conductors rated 60 deg (2) conductors with higher temperature ratings, provided the...

I understand I^2R=no-load losses, but I don't get how they get the values in the I^2R.

Could someone tell me why they don't use the angle when calculating the voltage regulation? This is such a simple question and I would have missed...aarrggg...

Could someone tell me why they divide by 4? Thanks.

sample question: The name-plate of a 1-phase, 4-pole induction motor has the following data: HP=0.5 Voltage=230 V Frequency=60 Hz FL current= 2.9A power factor=0.71 rpm=1610 Calculate the current taken by the motor and it's power factor if a capacitor of 15.9 uF is connected across the...

I didn't post the complete solution, but my question is why phase voltage is 254V? This is delta which has Vline=Vphase. Therefore, Ia=37.8<-36.9. Anyone see it differently?

The answer is (A) 759 Igenerator = (132/13.2)Iline However, this is a delta-wye transformer, isn't there a square-root of 3 different? I would consider the given line current of the transmission line equal the phase current, convert to the primary side and then multiply 1.73 to get the line...