Recent content by BradyD

I bought the Gruttadauria WR book.  The problems are very good, but there are a few mistakes to watch out for in the solutions (unit conversions mainly).  Either way, it's a great problem database. I also bought these all of the PE prepared exams...

Can confirm.  I work for an sub-agency of DOE and there are plenty of PEs here.

Congrats!!

Passed!  How'd you all do?

Getting close to results day!  I am nervous/excited.  How are you guys feeling?

Stop tormenting yourselves, guys!  Worrying and stressing about it won't help at all now.  Enjoy the time off from studying! I realize this is easier said than done; I had several problems I kept thinking about all last week.  

Chin up, you never know what will happen!  And if you have to retake, it's not the end of the world.  

I felt the morning was fairly straightforward and the afternoon was more challenging than I expected.  I'm a second-timer also, and definitely think I did better than my first time (I also studied for 180 hrs this time, vs about 50 last time).  In the morning I was confident on probably 34 of my...

I agree that the NCEES exam solutions don't exactly explain themselves that well, but this solution is correct.  1 ac-in/hr = 1 cfs (1.008 cfs really, but it's commonly used as 1:1). As a side-note, McCuen (the reference for this problem) was my surface water hydrology professor, and he drilled...

All -  Probably a stupid question regarding clarifier redundancy.  A plant has a flow of 9 MGD with 3 clarifiers.  Ignore redundancy.  I take this to mean if one clarifier goes down, the others DO NOT need to pick up the additional 3 MGD.  Therefore, solving a problem with this statement I...

Thank you for that in-depth explanation!  I guess whenever I see a storm and unit hydrograph with different duration I automatically assume to lag them.  Although, I guess you are effectively lagging this by lagging all Q values by one hour for the 0.7" section.  I think I need to review these...

All - I need some assistance on this problem.  I'm stumped: A rain event has an intensity of 1.5 in/hr for the first hour followed by 0.7 in/hr for the second hour.  The 1 hour unit hydrograph is as follows: T (hr):         1       2      3  Q (cfs/in): 0.5   1.2   0.4 I take this as a unit...

Thank, this is a huge help!  I think the link I was missing was assuming that the % mass of the flow is assumed to be the weight of the sludge.  This kept me up last night thinking about it, and I realized generally the SG of a sludge solution is assumed to be 1.0 per the CERM, so the leap...

Is there any way to print your embedded PDF with the 60 WRE problems?  I'd like to work through them but it's difficult via a computer screen.  I like to be able to write on the problems.  Thanks!

Hi All - I'm in the midst of studying for the PE, but there's one problem on the NCEES practice exam that I can't quite wrap my head around.  I'm going to truncate it for fear of reprisal from NCEES.  You are given 20,000 gpd of sludge flow, with 2% solids and 75% volatile.  They somehow get...