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A sprinkler system uses an outdoor reservoir at El 50. A fire pump moves Q = 3 ft^3/sec through a 1.0' dia pipe 300' long to an 8" dia main at El 200. To distribute water to sprinklers, a pressure head at the pipe junction hp =100' is required. The equation for friction loss is hl = (fl/d) x (v^2/2g). With new pipe, the friction coefficient "f" = 0.02.
a. Find the required energy input Ep and fp to be supplied by the pump. Assume the electric motors are set to turn the centrifugal pump impeller at f = 4000 rpm
b. Find the power delivered (WHP- don't worry about BHP) by the pump
c. Derive the expression for the hydraulic radius Rh of a pipe
d. Find the shear on the 12" pipe walls
e. Iron precipitates on the pipe walls, forming projections e = 0.001". Estimate the new coefficient "f" by Moody diagram (60 F ) and required increase in Ep to supply Q and the same hp. Rather than replace or re-line the 12" dia, what can you do to the pump motor to keep the Q = 3 ft^3/sec and hp = 100' spec.
The particle has a mass of 0.6 and is confined to move along the smooth horizontal slot due to the rotation of the arm .Determine the force of the rod on the particle and the normal force of the slot on the particle when = 35.
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If the superelevation is .10 at the station of the PC is 17+35, what is the station of the PI and how much distance must be cleared from the center of the lane to provide adequate stopping sight distance
The volume of a sphere is V=4/3pir^3. Prepare a table of volume versus radius which allows the radius to vary from 2.0 to 10.0 cm in 1 cm increments. Plot the data as a graph on log log paper showing the volume to radius relation
determine the elastic elongation that would be expected for a 16-mm-diameter rod of the same material if the rod were 1.6 m long and subjected to a tension force of 3.3 kN.
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