Construction Management
5th Edition
ISBN: 9781119256809
Author: Daniel W. Halpin, Bolivar A. Senior, Gunnar Lucko
Publisher: WILEY
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Chapter 4, Problem 4RQE
To determine
List two types of negotiated contract and explain the payment method and incentive concept.
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The head-vs-capacity curves for two centrifugal pumps A and B are shown below: Which of the following is a correct statement at a flow rate of 600 ft3/min?
Assuming a pump efficiency of 80%.
Head [ft]
50
45
40
35-
30
25
20
15
10
5.
0
0
Pump B
Pump A
100 200 300 400 500 600 700 800 900 1000
Solve for reactions and shear and moment diagram (base the answer on the 2nd figure).
Hand Calculation
2. Note: Assume bottom left support as roller, bottom right support as pinned
4 kN/m
3 kN/m
8m
4m
2m
Your client wants to build a WTP that has a withdraw of 440 MGD. What is the exceedance probability in percentage?
Average Monthly Minimum Flow of Record
Month
(MGD)
Jan-73
322
Feb-73
280
Mar-73
335
Apr-73
374
May-73
440
Mar-74
313
Apr-74
375
May-74
560
Jun-74
380
Jul-74
445
Aug-74
323
Sep-74
411
Oct-74
541
Nov-74
510
Jan-75
261
Feb-75
271
May-75
312
Jun-75
314
351
Jul-75
Aug-75
332
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- If a second 12.25" pump was added in parallel what would be the NPSHr be while both pumps are running? HEAD (Feet) 250- 200- Pump Series: VSX-VSC 10x12x13-1/2A 1780 RPM 13.5" 60% 70% -75% 80% 83% -85.5%- 150- 12.25" 100- 50 50- 10" 0- 2,000 NPSHr 83%. 80% 300HP- -75% 250HP 200HP 70% 150HP 125HP 100HP NPSHr(ft) 0 4,000 6,000 8,000 Capacity (GPM) 80 90 8arrow_forwardSolve for reactions and shear and moment diagram (base the answer on the 2nd figure) 1. Note: Assume bottom support as pinned 14 kN/m 16 kN 6m 5m 3m- 6marrow_forwardA plant treats 25 MGD at 5°C and pH=7.0. The plant uses ozone before the filter and free chlorine after the filter. The ozone contactor has a t10 of 3 minutes and a residual concentration of 0.3 mg/L. The free chlorine contact basin is 65 ft by 214 ft by 10 ft and a baffle factor of 0.5 and a residual concentration of 1.4 mg/Larrow_forward
- A3-inch diameter water pipe carries a flow rate of 6 gallons per minute. The pipe is 100 feet long and has a gate valve, two 45-degree elbows, and a sudden c factor for the pipe is 0.02 and the minor loss coefficients for the gate valve, elbows, and contraction are 12, 1.5, and 0.5, respectively. Determine the head loss due to friction and minor losses in the pipe, assuming the water temperature is 68°F and the density of water is 62.4 barrow_forwardBased on ONLY on the diagram below, how much energy is the pump adding to the system. The pressure gauge Reads 60 psi 20 feet 30 feet 5 feet 1 foot 2 feetarrow_forwardA confined aquifer has a differential drawdown (Ah) of 5 feet. The flow rate (Q) is measured to be 10 gpm. Calculate the transmissivity (T) of the aquifer in gpd/ft.arrow_forward
- Match the term from the Clean Water Act with its corresponding definitions National Pollutant Discharge Elimination System (NPDES) Total Maximum Daily Load (TMDL) Best Available Technology (BAT) Point source pollution A The maximum amount of a pollutant that a water body can receive while still meeting water quality standards. B. A permit program that regulates the discharge of pollutants from point sources into the waters of the United States. C. A specific location, such as a pipe or ditch, from which pollutants are discharged into a water body. D. A technology or treatment method that is determined to be the most effective way to control pollutants based on factors such as cost and feasibility.arrow_forwardEach gate of the lock is 6 m high and is supported by two hinges placed on the top and bottom of the gate. When the gates are closed, they make an angle of 120º. The weight of the lock is 5 m. If the water levels are 4 m and 2 m upstream and downstream, respectively, determine the magnitude of forces on hinges due to the water pressure.arrow_forwardQuestion 5 A submerged sharp crested weir 0.8 m high stands clear across a channel having vertical sides and a width of 3 m. The depth of water in the channel of approach is 1.25 m and 10 m downstream from the weir, the depth of water is 1 m. Determine the discharge over the weir in liters per second. Take Cd as 0.6arrow_forward
- Question 4 B A rectangular sharp crested weir is to be constructed in a testing station with a small stream in which the discharge varies from 50 liters/s and 1250 liters/s. Find the suitable length of the weir, if the minimum head to be measured is 50 mm and the maximum head on it does not exceed one-third of its length.arrow_forwardWater FR=? L=0.8 m Hinge H=2.0 m B Single Rigid Gate L₁=0.9 m Question 4 A The discharge over a trapezoidal weir is 1.315 m³/s. The crest length is 2 m and the sides are inclined at 75° 57'49" with the horizontal. Find the head on the weir in meters.arrow_forwardAs a strategy of the Salahadin Government to extend the residency community in Tikrit City, there is a plan to provide water for a new residential area on the west side of Tikrit City, as shown in the map in Figure 1. The new residential area is exposed to have 25000 residences, three schools to serve 1000 students, and a Plaza Markt that can serve 2000 persons. The water will be supplied from a purification station installed on the Tigris River at an elevation equal to 130 m. The distance between the water purification station and the center of the new residential area is about 9.5 km, and the elevation of the city center is about 150 m. The required pressure in the new residential area center is 30 m. The available pipes in the market with their price are shown in Table 1. Also, the price for each 10-meter of pump head is 1500$. Your task as environmental engineers is to design a sustainable and economically viable water system, including the main pipeline and pump for the new…arrow_forward
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