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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.
An open rectangular tank 1m wide and 3m long contains water to a depth of 1m. If the height of the tank sides is 1.5m, what is the maximum horizontal acceleration (along the axis of the tank) than can develop before the water spills
Design a lined trapezoidal channel to carry 20 m^3/sec on a longitudinal sloe of 0.0015. The lining of the channel is to be float-finished concrete (n=0.015). Consider (a) the best hydraulic section and (b) the section with side slopes 1.5:1 (H:V)
A tank contains 0.05 m^3 of nitrogen gas at -21 C and 10 MPa. Determine the mass of nitrogen, in kg, using: a) the ideal gas model b) data from the compressibility chart Comment on the applicability of using the ideal gas model for nitrogen at thi..
An equal-tangent crest vertical curve connects a +3.2% and -1.1% grade. The PVI is at station 98+20. Due to drainage considerations, the highest point of the curve is at station 100+79.35.
The storage in a reach of river is 20,000 m^3 at a given time. Determine the storage 1 hr later if the average rates of in flow and out flow during the hour are 20 and 18 m^3/s, respectively
disk of radius R=7 in. spins at a constant angular speed of w=500rpm in the clockwise direction. If the disk is released from rest far above the ground, what are the speed and acceleration of the disk's top C point after it has fallen h=3ft
given data of water softened by excess lime treatment, sketch a meq/l, calculate the softening chemicals required in pounds per million gallons, and draw a bar graph for the softened water after re-carbonation and filtration
1. The three isometric axes are: vertical and two axes 30 degrees from horizontal. 2. Oblique projection is a perspective projection method. 3. Isometric view represents a parallel projection method.
You have been hired to plan and build a subdivision on the volcanic island of Hawaii. As you know, this island is made of several shielf volcanoes. A) List the volcanic hazards associated with shield volcanoes.
determine the slederness ratio of a 5m column with built in ends if its cross section is circular with a radious of 40mm abd b 50mm square use the concept of effective length
why the prediction are less than the observed result of connection in tension experiment?
The cross sectional dimensions of a 4-ft-long wood member at 30% moisture content is 1.5 in. x 7.5 in., and its weight is 11 lb. At oven-dry condition, its dimensions and weight are 1.35 in x 6.8 in., and 10.2, respectively. What is its specific g..
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