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The new quiz problems in the PPI learning hub are very similar in difficulty to the NCEES practice exams and 6minute solutions.

Here's the latest (the CBT exams are cancelled now too): https://ncees.org/covid-19/ Pearson VUE Professional Test Centers Close in the United States and Canada Pearson VUE professional test centers in the United States and Canada are now closed and will remain closed until April 16 or...

Yes I reported this to NCEES. I only have access to the 2018 ASHRAE Refrigeration Handbook.

Page 383 and 385, note 3, Saturation temperature DeltaT for other capacities and equivalent length: The equation in the NCEES reference manual is DeltaT = Table DeltaT*[(Actual Le/Table Le) * (Actual Capacity/Table Capacity)]^1.8 According to the ASHRAE refrigeration handbook, the equation is...

Yes that makes sense. For some reason I had in my mind that it was a saturated liquid at  281F entering. Thanks! This problem definitely took me longer than 6 minutes, but that ok, it’s a great problem. For the enthalpy I took hf at 50psia and subtracted the sensible heat from 281 to 70. But...

Here’s what doesn’t make sense to me about this problem (unless I made a mistake somewhere).    Based on the information given, the water vapor in the exhaust gas would condense at 134F. Yet the saturation temperature of the water that is evaporating is 281F. So it’s impossible to get the...

Can I PM you to check my answer or should I post here?

I haven't used any resources from Slay the PE. But if I had it to do over again I would have used Slay the PE for my practice problems. The PPI learning hub problems are filled with errors (at least in the HVAC section). I deal with heat exchangers almost everyday at my job and I'm pretty...

Thanks for the feedback! I guess this makes sense. I never really think about combustion in regards to HVAC.

According to the NCEES syllabus, fuels and combustion are fair game on the HVAC exam (see applications/equipment and components/boilers and furnaces/fuel types and combustion). Inorganic chemistry...I'm not studying that, but maybe it is helpful for combustion problems. I'm taking the HVAC exam...

My best advice is to abandon the English system of units altogether. I almost never use English units at work. I just convert the answer to English at the end. That's the easiest way to stay out of trouble. But that doesn't work too well on the PE exam, especially the HVAC exam.

I agree I think people should take the exam that is closest to their current work or expected work if they are taking the exam prior to experience. It’s just difficult to choose between TFS and HVAC for some people. It was a difficult choice for me.

Can you explain what you mean by studying smarter? Did you just not do enough practice problems the first time? Or did you not focus on the right types of problems?

The answer to your question lies in the diagnostic report that NCEES gave you. What areas were you below average in? What areas were you average or above average in? If you were below average in all of the HVAC stuff but average or above average in all of the overlapping topics (like fluids...

Make sure to log in to your NCEES account and use the chat feature to report errors. Every time I report an error, the same test development engineer responds to me very quickly. So they will pay attention if you report an error.

I've noticed a recurring error in the PPI practice problems where in the solution to the problem they multiply lbm by the acceleration to get lbf. They neglect to divide by g_c. This error is on every problem that I have encountered where you have to convert lbm to lbf. I just solved a problem...

This sounds like a great deal for people studying for the exam. I would definitely be interested in this manual if I hadn't already bought all my study materials. Especially if Dr. Barber wrote the solution manual. He appears to know what he is doing 😀

I’m not sure if this is any help to anyone but I managed to score an 83% on the NCEES practice exam using only the NCEES reference manual. The practice exam is the same as the one that you were allowed to use your own references on. So the new reference manual can be used with some success.

Luckily I'm taking the HVAC&R test. From what I can tell, it looks like most of the major issues have been reported and should be fixed soon (for the HVAC&R and probably most of the thermal and fluids stuff). The other key is knowing how to solve problems using (aka not using) this...