Civil and Environmental Engineering Answers

A pump is installed to deliver water from a reservoir of surface elevation zero to another reservoir of elevation 290 ft. The 10-in-diameter suction pipe (f = 0.022) is 90 ft long, and the 8-in-diameter discharge pipe (f = 0.028) is 4900 ft long. Minor losses are neglected.
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in paralleI'm

A pump is installed to deliver water from a reservoir of surface elevation zero to another reservoir of elevation 290 ft. The 10-in-diameter suction pipe (f = 0.022) is 90 ft long, and the 8-in-diameter discharge pipe (f = 0.028) is 4900 ft long. Minor losses are neglected.
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in p

A pump is installed to deliver water from a reservoir of surface elevation zero to another reservoir of elevation 290 ft. The 10-in-diameter suction pipe (f = 0.022) is 90 ft long, and the 8-in-diameter discharge pipe (f = 0.028) is 4900 ft long. Minor losses are neglected.
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in parallel.

Water flows from an upper reservoir to a lower reservoir through a 150-m long 350-mm diameter tunnel that feeds a turbine. The tunnel has an estimated roughness height of 1 mm and the turbine is expected to extract energy from the water at a minimum rate 60 kW. The entrance and exit loss coefficients are 0.8 and 1.0, respectively. What is the minimum flow rate through the tunnel that is required to accomplish this objective? (The height between upper and lower reservoir is 45m)

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