My notes say Eq 26.19 in EERM. But looks like I skipped the problem in the end. Way more complicated than what you're likely to see on the exam in my opinion.
Jeffrey - Here are my thoughts on your questions based on my experience with the April 2011 exam (which I passed). 1) You probably did spend too much time on hydraulics, but don't worry about it now. I would not recommend doing the hydraulics review course. That time will be better spent on...
I am in the exact situation (related science BS and engineering MS) and have done some research on the issue in various states. Based on reading the minutes from board meetings, it does appear that some states will deny your comity application if you do not meet their education requirements...