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Isn't the correct answer actually A? B is close, but from eye-balling it or measuring it B's gate current comes a little to late.

http://i220.photobucket.com/albums/dd138/greg256/File0001-1.jpg Shouldn't the answer be zero? The answer they gave (A) is for the full-wave rectified.

Any comments? Agree with the solution?

Isn't the circuit output a Half-wave rectified Sin wave? Therefore the average voltage would be Vpeak/Pi?

This problem is for DC motors, not 1phase AC motors.

I agree that the answer to this question is the AWG 4 conductor. But since the circuit is at less than 100amps and according to NEC Section 110.14C1, shouldn't the left-most column for 60 deg C be used? In this particular problem with the current 66.7A, the 60 and 75 deg C columns both say to...

CI's solution says that Vab is the same as the line-line voltage of the AC source. And the answer is 125V*sqrt(3)=217V choose (D). I disagree. It is asking for the PEAK VOLTAGE, which is never greater the 125V*sqrt(2) = 177 V. Thanks.

We are missing some piece of info. Like Generator voltage?

When do you use 16 and when do you use 17 ?

The problem states: A code "Design C" type maximum locked-rotor current for a 3-phase squirrel-cage induction motor rated 15hp, 230V is? I used T430.7B to get 150A. The solution used Table430.251B (for Selection of Disconnecting Means) to get 232A. Isn't my solution the correct answer to the...

The Answer that I get is 479.9 V.

re: Complex Imaginary Test 3 Problem 57 This is a power correction problem on a 3-phase system. It states: "The rated voltage of the motor is 230V and the full-load current is 60A". The book's solution has: P=sqrt(3)(230)(60) But isn't this S ? Thanks

This is from Complex Imaginary Test#1 problem 70. It has a 3-phase generator with each phase of 125V half-wave rectified and connected to the input of one dc motor. It asks what is the peak voltage across the dc motor input? They answer given is 125*1.73=217V. I don't think this answer is...

This is what I got equivalent impedance to the right of R1 The book's solution had something else. Which is correct? Where did I go wrong?

Is the MVA Method the most universal and easiest method to use on all fault problems? Below is how I worked the sample exam afternoon fault problems using the MVA fault. Please verify that it uses the method correctly. Also I would appreciate comments re: if diagrams are correct. Thanks

I would like to buy GA Tech reference for PE Power Exam course material only (in 3 ring binder) I have seen 2 or 3 people sell theirs here after they have taken the course and test. But had already been sold. The prices have been around $30.00 Thanks

This is from sample college test. I disagree this answer but agree with the all the other problems answers. I see the problem as the load across the secondary being 600 ohms. The secondary voltage would be 600V and current 1 A. And the circuit in the primary being 5 Amps, answer B. Q.33 A...

I'm working the problem on page 54 of Ugly's Electrical References. I assume the voltage of the transformer secondary is 480V (same as the primary). Is that correct?

The answer is suppose to be C. Do y'all agree with my solution?

The answer is suppose to be B. Would someone give the correct solution? Is this type problem fair-game for the Power exam? Thanks.