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  1. O

    Mechanical PE

    I passed also. MD depth. I got the email to recieve our results online, waited a while hoping NCEES still showed what areas we need improvement in. After all, I was already studying for October. Logged in and had the pdf sent. It showed up and fully expecting a "fail" I opened it and saw...
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    Are practice problems allowed as a reference?

    I called NCEES Friday and asked this very thing. NCEES rules allow solved problems, solutions, practice exams, all done in pencil and with pencil notes in your books. As long as your state is following only NCEES rules then you may have all you mentioned, such is Ohio. However, states have...
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    Torsion of a Square Bar

    My strength book has an example similar to this but the method is not explained. You are all correct using superposition: T@6" x 6" and T@18" x 12". I'm not getting the concept. It makes perfect sense in loaded beams, but I'm having trouble applying it here. The torque at 18" does act on the...
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    SMS MD #56 Solution Incorrect

    You're right Brian, I had my triangle flopped. Thanks for posting!
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    SMS MD #56 Solution Incorrect

    The author set the equations up correctly. Since the acute, upper, angle was used 3340*sin(39.8) is correct to find the horizontal but the vertical shear was published instead. Same with vertical: 3340*cos(39.8) is correct but the horizontal shear is shown as the answer. I set it up using the...
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    Critical frequency of a spring

    I have the same references you do so nothing else to make a comparison. I solved it with the MERM equation, looked at the SMS solution, shrugged my shoulders, and went to the next problem. Both solution methods make sense but I'm so frustrated with the SMS right now I don't believe a thing in...
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    SMS MD #56 Solution Incorrect

    I believe the solution for problem 56 in SMS MD is incorrect. The problem is a 500 lbf load applied eccentrically to a plate with 4 bolts. In the solution the horizontal and vertical shear stresses are reversed. Horizontal should be 2140 psi, and vertical 2570 psi. The stress in the critical...
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    Spings Launching Balloons

    I set it up and solved it several times as an energy balance and finally looked at the answer. I would not think of solving it that way even given acceleration time. I don't think the answer makes sense either. 10 springs launching a 4.5 lb balloon 100 yards while imparting energy for 5" over...
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    Torsion of a Square Bar

    I agree. I believe the solution is wrong and the twist for the further bar should be calculated using 18".
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