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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.

Section 9.1.16 appears to be the only new section. Potential impact only for HVAC&R folks

Hi all, We're currently reviewing to see if we can figure out what changed... As per an email from NCEES "a small number of technical and editorial changes are indicated by a change in the second number" -- but they do not explicitly announce what those changes are.

Typically in hydraulics/incompressible fluids problems one would use the so-called "Extended Bernoulli Equation" with terms of energy per unit weight, so that the terms have dimensions of length (dynamic head, elevation head, pressure head, pump head, friction head loss, minor head losses, etc)...

Hi all! We are offering a special prize to the first 3 people who correctly answer the following problem. Please do not post the solution here. Work it out by hand, then take a picture or scan to PDF and send it to us via email to CustomerSupport at SlaythePE dot com. PROBLEM: An industrial...

Thanks for the kind words!

We have now uploaded tutorial videos for Otto & Diesel Cycles and for Ideal Gas Mixtures @MikeGlass1969 https://www.slaythepe.com/coaching-plan-members.html

Well, yes ASHRAE fundamentals is good but people now should consider using only the electronic handbook provided by NCEES for studying, because that is what you're going to have to use on test day.

Thanks Mike, It has been a while, but just recently we're picking up the pace again. We have two scripts ready for the voice actress so we'll be uploading those in about a couple of weeks.

We asked them about what changed and this is all we got:  We do not publish errata for PE handbooks. Major revisions are indicated by a change in the first number; a small number of technical and editorial changes are indicated by a change in the second number; and a small number of minor...

Section 3.8.8 Open Channel Flow is brand new. It only has one equation: the definition of the Froude number and no equations useful to make open channel flow calculations.