Recent content by Slay the P.E.

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Ok, I see now. As you have also noted, the table you linked uses the Darcy-Weisbach equation and the table in the reference handbook uses Hazen-Williams. One can find references recommending C=150 for Hazen-Williams in new steel pipe. Using C=150 brings the results a lot closer. It is worth...

@ZDG For 8-inch pipe, (ID=7.981”) with Q=1000 gpm, the Hazen Williams equation with C=100 yields 3 ft head loss for a length of 100 ft, matching the value in the table. From 3.4.2.3, Hazen-Williams for 1 foot length is: h = 10.44 (Q^1.85)/(C^1.85*D^4.87) If you plug in the numbers you’ll see...

What error do you see in this table?

Hi @GTGodzilla If you’re looking for TFS study resources, you may want to consider downloading the free sample pages from our study guide, here. In addition to the study guide, we have a free, full-length TFS practice exam which you can also download from our website. Cheers!

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We can help you out in these boards if questions arise . However, we are much more responsive in our private Slack channel, which comes for free when you buy our Practice Problems book. You can download a free preview (more than 80 pages) of the book from our website, here: Free PE Exam problems...

If it’s for the PE exam (the focus of these boards) then a sphere would be a bad idea simply because the correlation for drag on a sphere is not in the reference handbook (I think) Also, we’re getting into “spherical cow in a vacuum” territory: Spherical cow - Wikipedia

If it’s for the PE exam, perhaps you can model it as a flat plate (or two plates) and use the correlations for the drag coefficient. Then from there you can get the drag force.

Probably a good idea to memorize that the thermal efficiency of any heat engine is the ratio of the net power produced by the heat input, yes. This is in the reference handbook in a couple of places (poorly organized, IMO). Referring to version 1.3: First, you see it in page 266 under the...

...because that equation in the manual is valid only when the regenerator has 100% effectiveness.

Hi @Minipett We have a practice problems book with over 300 problems (all of which can be solved using only the handbook provided by NCEES). You can download a free preview of 80+ pages from our website, here. The book includes full customer support for any question you might have, as well as...

The units of dynamic viscosity in this table were correct before (in version 1.2), and now (version 1.3) they're wrong.