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Consider a high-rate sedimentation basin with tube settlers. The basin is 120 feet long and 30 feet wide. The length of the basin covered by tube settlers is 90 feet. The water depth is 15 feet. The length if the flow path in the tubes is 2 feet, the diameter of the tube is 2 inches. and the tubes are inclined at 60 degree angle.
1) Use recomended design criteria to choose a suitable surface overflow rate in gpm/ft^2.
2) Determin the allowable flow through the basin in million gallons per day (mgd).
3) Determin the flow velocity within the tubes in feet per minute (fpm)
4) Determin the detention time within the tubes in minutes.
If the purlins are spaced 4 ft and the bents are spaced 25 ft apart, determine the distributed loading that acts along the purlin DF and the loadings that act on the bent at A,B,C,D, and E.
Determine the location e of the shear center, pt. O, for the thin-walled member having the cross section shown. The member segments have the same thickness t.
Two materials A and B are tested and a stress-strain curve is plotted. Material B has a yield stress of 200 MPa and Material A has a Yield stress of 120 MPa. These materials have plastic Deformation occur at the same Yield strain %.
The upstream invert is at an elevation of 8ft and the downstream invert 4 ft. If the depth at the upstream end of the culvert is 8 ft, what is the flow through the culvert. Assume the culvert is in inlet control.
A well water has the following mineral contents in mg/L: Na+=20; K+=35; Ca+2 =15; Mg+2 =10; Sr=0.5; Cl- =40; HCO3- =65; CO3-2=5; SO4-2=15; and NO3=10.
Wastewater flow of 2000 m3/day containing 120g/L of salt. Discharge into a river with a flow of 34,000 m3/day and a salt concentration of 50 mg/l. The agency wants to maintain the salt level to no greater than 250 mg/L downstream of the discharge.
A long trough is supported by a hinge along its lower edge and a series of horizontal cables attached to its upper edge. Determine the tension in each of the cables, at a time when the trough is full of water.
A permeation membrane separates an inlet air stream (79 mol% N2, 21 mol% O2) into a permeate stream and a reject stream. The inlet stream conditions are 293K, 0.5 MPa and 2 mol/min; the conditions for both outlet streams are 293 K and 0.1 MPa.
A driver with his passenger vehicle is driving at 35 mph, when the traffic signal in front of him changes to yellow. He is 100 feet from the intersection when he applies the brakes after a 1-second reaction time.
If the allowable shear stress is 100 MPa, calculate the maximum shear force V that a W460 X 60 structural steel wide flange is capable of resisting. Use the average web shear approach.
Two sites, A & B, are being considered for the construction of a dam. Construction at Site A will cost $20 million and have an annual benefit of $2 million. Construction at Site B will cost $30 million and have an annual benefit of $3 million.
Calculate the largest tolerable internal crack length for a 7075-T651 aluminum alloy component that is loaded to a stress one-half of its yield strength without catastrophic fracture. For the alloy, the plane strain fracture toughness is 24 and yi..
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