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A small city is evaluating disinfection requirements for their drinking water plant. With an average flow of 5 MGD and a peak flow of 9 MGD, determine the controlling CT factor (virus or giardia) when the water temperature is 23 degrees C. Typical pH during treatment is 7.75. In addition to comparing and determining controlling CT, compare sizes of clearwell(s) needed for achieving compliance WITH partial credit for turbidity removal and WITHOUT partial credit. Finally, look at the required volume of clearwell needed to comply during peak flow - assuming chlorine residual of 1.2 mg/L and average baffling in the clearwell. Assess the volume required if the baffling is superior.
A fire hydrant is supplied through a 6 inch cast iron pipe of 16,000 feet length. The total drop in pressure is limited to 35 psi. What is the discharge through the pipe for a water temperature of 80°F ((kinematic viscosity) = 0.93 × 10-5 ft2/sec)
Water at 20 Degree C is pumped at a constant rate of 9m^3/h from a large resevoir resting on the floor to the open top of a anexperimental absorption tower.
Imagine two small towns of 1,000 people: Blacktop and Parktown. In the urban sprawl that is Blacktop, all the residents own fuel-efficient cars (15 km/liter) and travel an average of 20,000 km per year.
the scale of a spring balance reading from 0 to 235 n has a length of 13.0 cm. a fish hanging from the bottom of the
a car travelling at 60 mph in a construction area skids into a stack of concrete barriers. skid marks leading to the
If a plus sight of 12.03 ft is taken on BM A, elevation 312.547 ft, and a minus sight of 5.43 ft is read on point X, calculate the HI and the elevation of point X.
Given that the moduli of electricity of this material are respectively 69GPa and 393 GPa plot modulus of elasticity versus the volum percent of Al2O3 in Al from 0 to 100 vol % using both upper and lower bound expressions
An insulated rigid tank is initially filled with a saturated liquid-vapor mixture of water. Initially three-quarters of the mass is in the liquid phase, the mass is 10 lbm, and the pressure is 15 psia.
a mechanic uses a crowfoot wrench to loosen a bolt at c. the mechanic holds the socket wrench handle at points a and b
The concrete girder supports the two column loads. If the soil pressure under the girder is assumed to be uniform, determine its intensity w and the placement d of the column at B. Draw the shear and moment diagrams for the girder.
Describe three different ways to generate random numbers and explain for each of the four properties (from (a0) which is “yes” and which is “no”.
The subcritical water level in the channel downstream from the stilling basin is at an elevation of 100 feet above the datum. assume no energy loss over the spillway, determine the invert of the stilling basin required to form a hydraulic jump in ..
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