See those intersecting green lines? They should be intersecting in one of those orange areas, but the head is too small (7.34 ft) for the volume flow rate (1000 gpm). I've gone through the first guy's calculations several times, and everything looks legit. Here are my four possible options:
- The problem was poorly defined by the teacher (always option 1 in my book), but everyone else in the class would have complained this morning.
- The pump to choose is 4x6-13, but this will result in gross inefficiencies.
- We interpreted the data wrong and got a bad value for head (most probable), but I have scoured the calculations and emailed them to the professor for a second opinion (no response).
- I should give up engineering and study law instead.