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Download the latest revision of the NCEES Mechanical Engineering Manual....   hf = 167.53 KJ/kg  is in my manual page 325 chapter 6.3.4

BuffaloWings, I do not believe their solution is correct either.  I believe, Outside Air Load is from Outside Conditions to Room Conditions for the Outside CFM.  Please correct me if I am wrong.  The solution appears to use the Mix Air Enthalpy, instead of the Return Air Enthalpy .

They are correct.  I did not carefully read the problem.  They gave room load conditions and I left out the outside air load.  Odd that I got the exact answer even though I did it wrong. again. and again.

AHHH...   Crap!!!!   I totally butchered this problem...  Diagram and Solution attached. I apologize to those that I may have screwed up.    Thanks for the heads up BuffaloWings ...

It's really difficult to say...   I was going through the chapter in the MERM and doing the practice problems.  I was building confidence right up to a single problem that I could not figure out why they used a certain number in their solution.  At that point, I was not so confident.  SO...  I...

I figured their method out last night.  I just wanted to put it in MathCad.

Do you have the answer or the solution...  I fell smack dad in the middle of two answers.  Which means I probably did the whole thing wrong. Nevermind...i have it

OOPS!!!!   YEP...   Mybad!   Didnt change the answer though...

Does this help?

What happens if this drags out past 1 year?  Your references expire, is there a need to refile?

That's really difficult to say.  I have not had all the material here..  But, from what I have read, here on the forums,  and did have I believe the PPI Practice Problems had the most difficult questions. From what I have read on the forums, the NCEES 2001 and 2008 version are identical.  ...

Just read on the NCEES facebook page that the April 2020 exams have been cancelled.   I thought with the move to to CBT, thing were in the works to take the test at anytime, like exam center???  

Well,  I didn't say it was ok.  They are still working out the bugs out of it.  Just best to use Acrobat.  

I have seen that with other pdf viewers.  You should only be using the Adobe Acrobat, or whatever they call it today, to view or printing the the manual.

From the table below under the flue gas from stoic.,    ft3/ft3 fuel column,  read the moles of H2O produced from burning one mole of fuel.   (2) for methane(CH4), (3) for Ethane (4) for Propane.   Now since this a mixture of fuels multiply the %vol of each component.  So...

Binge watched Into The Badlands.   Meh..  It was something to watch while I wait to binge watch Picard with my free cbs trial.... only couple more weeks to go...

I have watched the California Polytechnic @ Pomona courses on Thermodynics, Heat transfer and Fluid Dynamic courses online.  I thought they were excellent, just like in college. https://www.youtube.com/channel/UCZScjkZuVuvwa-JVA3mHO3w 

This problem looks intimidating but once you do your mass and energy balances around each piece of equipment it becomes an algebra problem.  

Question 127 ask you to find the Temperature at point 8.

I also vote for Slay...  He will have you ready for the exam.   He is also readily available here on the forums to help answer your questions.    I spent $1500 on a local review class that met twice a week for 12 weeks.  I realize now that was a waste of money because I still had to commit to...