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A water treatment plant for a community of 10,000 is designed for a constant flow rate of 4000 m3/d. The flocculation system will consist of three tanks, each having an average hydraulic retention time of no greater than 45 min. It is desired to be able to take one tank out of service for maintenance without exceeding an average velocity gradient of 50 s-1 in the remaining two units. Determine the motor output power, assuming that losses are 50%.
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.
An in-ground swimming pool may have a leak. The 30-ft by 10-ft by 5-ft (depth) pool is filled on June 1. On June 13, a hose, flowing at a rate of 10 gallons per minute, is used to add water to the pool. The hose is turned off after 1 hour.
This 140 lb gymnast supports himself with arms stretched out in the iron-cross position shown. Say the arms each weigh 10% of the body weight (and have approximately uniform distribution of mass), and that each ring exerts only an upward force on ..
In New york you had a balloon inflated with helium (He) and you measured its temperature, which was 89.6 degree F, and its pressure, which was 100,000 N/m^2. In Colorado, however, you noticed that the temperature of the He was 69.8 degree F and th..
Water flows from a drain spout with an initial velocity of 2.5 ft/s at an angle of 15o with the horizontal. Determine the range of values for the distance d such that the water will enter the trough BC.
The temperature of steam at the inlets of both turbines is 500 C, and the enthalpy of steam is 3027 kJ/kg at the exit of high pressure turbine, and 2385 kJ/kg at the exti of the low pressure turbine.
What is the height of the tallest vehicle that can pass through the tunnel at a point 22 ft from the center? See Fig. 21.70
Why should barrier wall EIFS be avoided?
A tied short column of square cross-section is subjected to a factored axial load of 2500 kN and a factored bending moment of 175 kN.m. Use a 40 mm clear cover to the ties and a 20 mm maximum aggregate size.
What is DBM? Why use DBM where other binder courses are available? What is composition and advantages of using DBM?
Refer to Figure 13.14 (site grading plan). A grade stake was set near the middle of Lot #26, and the stake-top elevation was determined to be 84.15 m. Compute the cut and fill at each lot corner.
Determine the deflection at C using the strain energy method - derive an expression for the deflection equation along the span AB. Determine the deflection at C.
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