1.Find the length and width of a square basin for virus disinfection of a flow of 6 MGD. You may assume a depth of 5 ft, a C?t product of 10 (mg/L) ?min for 1.5-log removal, and a target free chlorine residual of 0.6 mg/L.
2.A one-way solid concrete slab is to be used for a simple span of 16 ft. In addition to its own weight, the slab carries a superimposed dead load of 50 psf and a live load of 75 psf. Using the strength method with fc' =4 ksi, and fy= 60 ksi, design the slab for minimum overall thickness.