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  1. engineering_investigator

    REF PIPING

    Hi Engggu, You never want to run piping in such a way that the only consideration is to make it look good. Ideally, a pipe chase is available where you can run your piping and service it if ever a problem arises. However, not every job is ideal and you have to run your pipe in areas where it...
  2. engineering_investigator

    moisture content/acid number on compressor oil analysis

    Hi MedicineEng, I would recommend contacting the people that did your tests and make sure that you understand what their results are telling you. Aside from from the results, 1000 ppm of moisture sounds awful high to me. Has your heat pump experienced a refrigerant leak and had to be recharged...
  3. engineering_investigator

    Mechanical engineers, what career did you end up with?

    I graduated from college with a degree in mechanical engineering in 1978. Out of college, I went to work in a refinery as a design engineer. Worked for about a year and then joined the Air Force. In the late '70s, the government had a big push going on to recruit technical people. So I went...
  4. engineering_investigator

    Pursuing PE at 40 years old?

    Whether taking the FE or PE you must work problems, work problems, and then work some more. I took the FE (EIT back in '78) while a senior in school and then the PE in '83. passed them both on the first try. I believe that I was successful because of the time I put in to study and continually...
  5. engineering_investigator

    Flow through Nozzle

    When considering air flow through a nozzle, compressible flow theory tells us that the temperature must drop between the inlet and outlet. This scenario assumes isentropic flow through the nozzle. For all practical purposes, a temperature drop does not occur with any noticible difference at low...

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