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  1. I

    So...How do I start? (CA)

    Hello, I finally got my PE in Mechanical TFS. My background is mostly in water resources/wastewater. I am trying to utilize my hard earned PE license but I have very little experience in TFS or other mechanical disciplines. I want to get more experience/exposure and ultimately be skilled enough...
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    A free TFS practice problem (maybe interesting for HVACR folks too)

    Initial State: P = 50 psia, quality = 0.5 (sat'd mixture), two states fix specific volume (v_i) on steam table, use quality to find initial specific volume,  vf < v_i < vg.  Rigid Tank implies Constant Volume Process,  so v_i = v_f = 4.267 ft3/lbm. Final State - At instant when PRV was...
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    When is Steam not an Ideal gas?

    Thank you for the explanation. The use of psychometrics to check for ideal gas is new to me, thanks.  If I swap the inlet/outlet conditions and replace the turbine with a compressor, will the constant entropy for ideal gas model work?. Since the inlet condition can now be approximated as an...
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    When is Steam not an Ideal gas?

    I am trying to get some help on this question. it is directly from the NCEES ME practice exam TFS 2019. At first glance I used the constant entropy process for ideal gas and I got a negative outlet temperature in F. How can I tell if it is not an ideal gas process from the question?   The...
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