6. there are five identical circular primary sedimentation tanks (in parallel) to be installed at a potw. the average plant influent flow rate is 30 mgd, and the peaking factor is 2.5. the design surface overflow rates are 1,000 and 1,500 gpd/ft2 for the average flow and the peak flow, respectively. a) determine the required total area of these primary sedimentation tanks under average flow b) determine the required total area of these primary sedimentation tanks under peak flow c) determine the design diameter of these primary sedimentation tanks at this facility d) if the water depth is 12 ft, what is the hydraulic detention time under the peak flow condition?

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Ashielded metal arc-welding operation is accomplished in a work cell by a fitter and a welder. the fitter takes 5.5 min to load components into the welding fixture at the beginning of the work cycle, and 1.5 min to unload the completed weldment at the end of the cycle. the total ength of the weld seams 1200 mm, and the travel speed used by the welder averages 300 mm/min. every 600 mm of seam length, the welding stick must be changed, which takes 0.8 min. while the fitter is working, the welder is idle (resting): and while the welder is working the fitter is idle. (a) determine the average arc-on time as a fraction of the work cycle time. (b) how much improvement in arc-on time would result if the welder used flux-cored arc welding (manually operated), given that the spool of weld wire must be changed every 10 weldments, and it takes the welder 5.0 min to accomplish the change? (c) what are the production rates for these two cases (weldments completed per hour)? attach your work and solutions.