The Hydraulic Principles Of Water Supply Systems
1.A 3 - 1/2 inch fire hydrant port is flow tested with a pitot reading of 10 psi and a residual pressure of 43 psi. If the static pressure is 68 psi, what is the available fire flow at 20 psi residual ?
a.1200 gpm
b.2000 gpm
c.1479 gpm
d.4000 gpm
2.A pump is needed to transfer water at the rate of 1500 gpm against a TDH of 130 feet. If overall efficiency is 85%, what horsepower motor would you select ?
a.50 hp
b.60 hp
c.10 hp
d.100 hp
3.Your system has 2300 people with a peak hour demand of 800,000 gpd and a maximum fire flow requirement of 5,000 gpm for 2 hours. What minimum storage volume should you consider providing to meet these demands ?
a.50,000 gal
b.1,000,000 gal
c.10,000 gal
d.633,333 gal
4.Refer to the Bernoulli Principal, pipe flow. The elevation at 1, is 100.00 feet and at 2, is 102.00 feet. Pressure at 1 is 50 psi and at 2 is 48 psi. If the pipeline is 800 feet long what is the slope of the hydraulic grade line between 1 and 2 ?
a.0.0156
b.0.00327
c.0.000747
d.01.140
5.To quickly size a pipe to deliver a flow of 1800 gpm what size pipe would you choose ?
a.12-inch
b.14-inch
c.16-inch
d.18-inch
6.A concrete, rectangular flume delivers water to your treatment plant. The flume measures 8 feet wide at the bottom and slopes 0.1 foot per 100 feet. Manning's n for this flume is 0.013. At a depth of 4 feet, what is the flow rate into the plant ?
a.211.3 cfs
b.183.4 cfs
c.18.34 cfs
d.500 cfs
7.A 1,000 foot transmission line carries a flow at a velocity of 4.67 feet per second. The line is 12-inches in diameter and has a roughness coefficient, f , of 0.040. What is the head loss in this line in feet of water ?
a.12.67 feet
b.13.55 feet
c.26.14 feet
d.10.00 feet
8.When calculating the system head curve, gate valves are best accounted for using:
a.The Darcy-Weisbach Equation
b.An H-W "C" value of 140
c.An iterative approach
d.Equivalent length of straight pipe
9.In the water system grid below, what is the flow between nodes 6 and 8 ?
a.100 gpm
b.700 gpm
c.1000 gpm
d.200 gpm
10.Mythical River has a population of 4,280 people. If maximum day demand is 1,091,400 what is the per capita demand ?
a.850 gpcd
b.255 gpcd
c.100 gpcd
d.935 gpcd
11.Which of the following is NOT an empirical formula ?
a.Manning's
b.Hazen-Williams
c.the Continuity equation
d.Darcy-Weisbach
12.A pump designed to deliver 300 gpm at 250 feet TDH is accidentally throttled back to 150 gpm. Which of the following problems might this cause ?
a.reduced efficiency
b.higher power consumption
c.cavitation
d.all of these
13.The Mythical River intake structure contains 20,000 lbs of water. How many gallons does it contain ?
a.4,800 gal
b.5,200 gal
c.2,400 gal
d.2,670 gal
14.Water temperature in the Mythical River is a nice 49° F. What is this in Celsius ?
a.54°C
b.9° C
c.17° C
d.21 °C
15.The depth of water in a sedimentation basin is 12 feet. What is the pressure at the inside base of the sidewall in psi ?
a.23 psi
b.44 psi
c.5 psi
d.86 psi
16.The "S" in Manning's Equation stands for:
a.the bottom slope
b.the sidewall height
c.the viscosity of water
d.the slope of the hydraulic grade line
17.If the reservoir is half full in Mythical River, what would be the normal static pressure at a fire hydrant in the service area which is at elevation 120 ?
a.46 psi
b.73 psi
c.120 psi
d.10 psi
18.An older pipe with a Hazen-Williams C of 90 is replaced with a new pipe of the same diameter. If the old pipe carried 800 gpm what would be the approximate capacity of the new pipe which has a C value of 120 ?
a.750 gpm
b.1067 gpm
c.800 gpm
d.960 gpm
19.The Moody Diagram may be used to:
a.assess your biorhythms
b.estimate power costs
c.find the "f" for a pipe type
d.calculate "n"
20.Two identical pumps in series will produce about:
a.twice the flow
b.twice the head
c.half the flow
d.half as much as before
21.The Bernoulli Principle is a special adaptation of:
a.Italian technology
b.The Law of Conservation of Energy
c.The Law of Conservation of Momentum
d.The Universal gas Law
22.The point where the pump characteristic curve and the system head curve intersect is called:
a.the nexus
b.the peak daily flow
c.the algorithm
d.the operating point
23.Water hammer occurs:
a.only in hard water
b.whenever water rapidly decelerates
c.often in pump suction lines
d.east of the Rocky Mountains
24.Two identical pumps are operated in parallel. The resulting flow will be:
a.turbulent
b.less than twice the capacity of each pump
c.at twice the discharge pressure than with only one pump
d.incalculable
25.Maximum day demand in Mythical River occurred on July 4, 1776. What happened that day?
a.pumps broke down
b.the River dried up
c.the Water Superintendent quit
d.A declaration was signed in Philadelphia. A high watermark in our history.
____°F ____°C
Framed, One-Way Conventionally Reinforced, Concrete Slab, Joist and Beam Systems Excel 6-Sigma Quality Tools Part-1
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1.Question 1
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Excel 6-Sigma Quality Tools Part-1
You need to first download and print out the Quiz Questions and then mark the correct answer below for each question.
1.Question 1
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The Design and Construction of Cast-in-Place Concrete Axial Load Carrying Members including Columns and Walls (both Shearwalls and Tilt-Up Walls)
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Excel 6-Sigma Quality Tools Part-1
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