Can someone direct me to, or help me with how to remember grade calculations, offsets weight of water in a stack, volume of an interceptor, area of a roof for drainage, degree day, parcipitation chart, longest run method for sizing gas pipe, maximum dfus for bld. Sewer/pipe size. I did study all this in school, but I gave away all my textbooks, and am scheduled to take the test on thur. I should get one of those little 'fitter books'. Thanks

Too late man! You gave away all your textbooks BEFORE you're scheduled to take the test. Put the test off, buy some more books and study up before you go in. And this time go in prepared. Good luck on the test. Tom