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1.A flocculation/sedimentation combination basin in a conventional drinking water treatment plant is to be constructed of cast-in-place reinforced concrete. The horizontal flow rectangular basin will be located in New Jersey, USA. The client must decide whether or not to pay to have the basins covered with a concrete slab or,alternatively, left open. Discuss all the factors that the client should consider when deciding whether or not to cover the floc/sed basin. Discuss all the advantages, disadvantages and considerations that the client should think about. Be clear and complete so the client understands what the choices are and any ramifications of the decision.
2.If the sedimentation basin in problem 1 (ignore the floc basin for this problem) receives a flow of 1400 gallons per minute, and has a depth of 10 feet, what are the length and width dimensions if the basin is designed to remove particles that have a settling velocity greater than 30 feet per day? The basin will have a length to width ratio of 4 to 1. What are the flow through velocity and hydraulic retention time for this basin?
At a point in a material, a resultant stress of 151 MN/m^2 acts in a direction making angles of 52 deg, 79 deg, and 40.13 deg with the coordinate axes, x,y and z respectively
A 180 lb man and a 120 lb woman stand at opposite ends of a 300 lb boat, ready to dive, each with a 16 ft/s velocity relative to the boat. Determine the velocity of the boat after they have both dived
The 30-Mg freight car A and 15-Mg freight car B are moving toward each other with the velocities VA= 20 km/h to the right and VB= 10 km/h to the left. the spring constant on car A is k= 3MN/m.
An engineering student is driving on a level roadway and sees a construction sign 600ft ahead in the middle of the roadway. The students strikes the sign at a speed of 35mi/h. If the student was travelling at 55mi/h
The window is to be bolted onto the vertical wall of the pool and faces outward, covering a 2ft diameter opening in the wall. The venter of the opening is 4ft below the surface.
Water in a rectangular channel flows into a gradual contraction section. If the flowrate is Q = 25 ft^3/s and the upstream depth is 2 ft, determine the downstream depth. Sketch the specific energy diagram and indicate its important characteristics. N..
A particle which moves in two-dimensional motion has coordinates given in inches by x=t^2-4t+20 and y=3sin2t, where the time t is in seconds. Determine the magnitudes of the velocity v and the acceleration a and the angle between these two vectors..
A hot-rolled 7-mm-diameter steel rod is axially loaded at room Temp under a fully reversed cyclic loading. under the rotating beam test, the endurance limit for this steel is 470 MPA, under static loading the ultimate strenght is 1200 MPA.
Determine the cycle time for a single engine scraper rated at 21 cy heaped that is used to haul material from a pit to a fill 900 ft away under severe conditions.
Air at 90 psia and 70 degrees F flows through a 4.5 inch diameter welded steel pipe (e = 0.00015) at 60 lb/min. Find the friction head loss and pressure drop in 200 ft of this pipe. Assume the air to be of constant density.
A 45-percent efficient, coal-fired power plant generates output power of 1000 MW (106 kW) and emits SO2 at the legally allowable rate of 0.6 lb SO2 per million BTU of heat into the plant. The stack has an effective height of 250 m.
fator dumps 5m^3/s of nonconservative waste with concentration 100mg/l into the lake. the pollutant has a reation rate coefficient K of 0,23/day assuming the pollutant is well mixed in the lake, find steady state concentration of pollatant in the ..
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