# Shared Flashcard Set

## Details

Water Distrib Exam Class I
Water Distribution Exam Class I
81
Other
Professional
06/18/2007

Term
 The size of water mains, pumping stations, and storage tanks is primarily determined by _______?A. Maximum day demand during any 24-hour period during the previous yearB. Population servedC. Per-capita water useD. Fire Protection requirements
Definition
 D. Fire Protection requirements
Term
 Which of the following is a measure of the smoothness of a pipe?A. S factorB. C valueC. Hazen-Williams formulaD. T factor
Definition
 B. C valueThe higher the C value the smoother the pipe. Hazen-Williams formula calculates pipe size.
Term
 Why is excessive water pressure to residential homes objectionable?A. increases particulate matter reaching the customerB. Causes erosion of the copper plumbing due to the high velocities, giving the water a metallic tasteC. Decreases the life of wa
Definition
 C. Decreases the life of water heaters and other water-using appliances
Term
 What is the best time to perform a flushing program on the mains?A. Spring when the weather is usually mildB. Fall when water usage is low and the weather not yet harshC. Late at night to lessen traffic disruption and minimize customer complaints.
Definition
 C. Late at night to lessen traffic disruption and minimize customer complaints.
Term
 Calculate the pounds per square inch pressure at the bottom of a tank,if the water level is 33.11 ft deep?A. 14.3 psiB. 28.6 psiC. 33.1 psiD. 76.5 psi
Definition
 A. 14.3 psipsi=depth,ft = 33.11 ft = 14.3psi 2.31 ft/psi = 2.31 ft/psi(Divided By)
Term
 As temperature of the water increases, the disinfecting action of chlorine is _________?A. More EffectiveB. Not affectedC. Less EffectiveD. Likely to increase DO
Definition
 A. More Effective
Term
 Large full storage tanks are typically disinfected with a chlorine residual of _________?A. 3 mg/LB. 10 mg/LC. 25 mg/LD. 50 mg/L
Definition
 B. 10 mg/L
Term
 Why is a well acidified?A. Take out soluble iron or manganeseB. Increase the well's productivityC. Remove objectional gasesD. Remove Turbidity
Definition
 B. Increase the well's productivity
Term
 What is the PRIMARY source of coliforms in a water supply?A. Insects that live or die in the water sourceB. Protozoans and other microorganismsC. FertilizersD. Fecal material from warm-blooded animals
Definition
 D. Fecal material from warm-blooded animals
Term
 pH is a measure of ___________?A. ConductivityB. Water's ability to neutralize acidC. Hydrogen ionsD. Dissolved Solids
Definition
 C. Hydrogen ions
Term
 What is the term for a framework of wood or metal installed to prevent caving of trench walls?A. SheetingB. SlopingC. ShieldingD. Shoring
Definition
 D. Shoring
Term
 Which one of the service line materials is NOT flexible?A. CopperB. Galvanized ironC. LeadD. Plastic
Definition
 B. Galvanized Iron
Term
 Which type of pipe is typically used in the construction of very large water mains?A. Asbestos-cementB. SteelC. PlasticD. Galvanized
Definition
 B. Steel
Term
 Air-relief valves are installed to ____________?A. Release some of the energy created by water hammerB. Stop flow completely when tank is fullC. Vent air that has accumulated in the well column while the well is not in useD. Turn off pressure duri
Definition
 C. Vent air that has accumulated in the well column while the well is not in use
Term
 After a new water main is installed and pressure tested, it should be ____?A. Flushed with clean water for 24 hours & put into serviceB. Filled with a solution of 25 ppm - 50 ppm free chlorine for at least 24 hours prior to flushingC. Filled with cl
Definition
 B. Filled with a solution of 25 ppm - 50 ppm free chlorine for at least 24 hours prior to flushing
Term
 Which type of hydrant has no main valve but has a separate valve for each nozzle?A. Wet-barrelB. Warm-climateC. Dry-barrelD. Breakaway
Definition
 A. Wet-barrel
Term
 What is the maximum theoretical suction lift of a centrifugal pump at sea level?A. 10 ftB. 34 ftC. 52 ftD. 85 ft
Definition
 B. 34 ft
Term
 What type of motor is the simplest of all AC motors, with rotors consisting of a series of bars placed in slots?A. Squirrel-cageB. Wound-rotorC. Capacitor-startD. Synchronous
Definition
 A. Squirrel-cage
Term
 What does SCADA stand for?A. Statistical Calculations and Data AnalysisB. Supervisory Control and Data AquisitionC. Standard Computer and Data AccessoryD. Sample Concentration and Data Analyzer
Definition
 B. Supervisory Control and Data Aquisition
Term
 Which of the following type of valve is used in maintaiing prime to a pump?A. FootB. SuctionC. Vacuum headerD. Butterfly
Definition
 A. Foot
Term
 Depending on its concentration and length of exposure, which of the following gases can cause lung and skin irritation?A. Carbon MonoxideB. ChlorineC. MethaneD. Nitrogen
Definition
 B. chlorine
Term
 What class of fire involves electrical equipment?A. Class AB. Class BC. Class CD. Class D
Definition
 C. Class C
Term
 When a permit is required to enter a confined space, who may sign the permit?A. EntrantB. Person AttendingC. Entry SupervisorD. OSHA Representative
Definition
 C. Entry Supervisor
Term
 When any piece of electrical equipment is being worked on, the circuit breaker should be ____________?A. Painted when repair is completeB. Videotaped for future referenceC. De-Energized and locked outD. Replaced
Definition
 C. De-Energized and locked out
Term
 OSHA is an acronym for ____________?A. Organization for Safe Health AdministrationB. Occupational Safety and Health AdministrationC. Occupational, Safety and Health ActD. Organization of State Health Administrator
Definition
 B. Occupational Safety and Health Administration
Term
 The SDWA defines a public water system that supplies piped water for human consumption as one that has __________?A. 10 service connections or serves 20 or more people for 60 dyas or more per yearB. 15 service connections or serves 30 or more people f
Definition
 D. 15 service connections or serves 25 or more people for 60 days or more per year
Term
 The most common water complaints are taste, odor, and _____________?A. pH levelB. Faucet pressureC. Colored WaterD. Leaking pipes
Definition
 C. Colored Water
Term
 What US agency establishes dring water standards?A. AWWAB. USEPAC. NOISHD. NSF
Definition
 B. USEPA
Term
 Why should the water operator contact area companies with underground utilities before starting an underground repair job?A. To determine if there have been recent excavations in that locationB. To ask companies to locate and mark the location of thei
Definition
 B. To ask companies to locate and mark the location of their utilities in the area of the repair job
Term
 According to the USEPA regulations, the owner or operator of a public water system that fails to comply with applicable monitoring requirements must give notice to the public within ________?A. 1 wk of the violation in a letter hand-delivered to custome
Definition
 C. 3 months of the violation in a daily newspaper in the area served by the system
Term
 In a 6-in pipeline needs to be flushed. if the desired length of pipeline to be flushed is 316 ft, how many minutes will it take to flush the line at 31 gpm?A. 10 minutesB. 15 minutesC. 30 minutesD. 60 minutes
Definition
 B. 15 minutes
Term
 What is the area of a trench that is 22.4 ft long and 3.3 ft wide?A. 26 sq ftB. 74 sq ftC. 143 sq ftD. 187 sq ft
Definition
 B. 74 sq ft
Term
 Which of the following is typically associated with trihalomethanes?A. High levels of carbon dioxide in surface water sourceB. Surface water high in inorganicsC. Water with organics that has been chlorinatedD. Groundwater or surface water high in
Definition
 C. Water with organics that has been chlorinated
Term
 Which of the following mandates the language & methods for public notification?A. American Water Works AssociationB. National Rural Water AssociationC. US Environmetal Protection AgencyD. California State University
Definition
 C. US Environmetal Protection Agency
Term
 What is the primary source of lead in drinking water?A. LakesB. Rivers near lead minesC. Corrosion of plumbing systemsD. Groundwater
Definition
 C. Corrosion of plumbing systems
Term
 Interior copper tubing is usually joined by _____________?A. SolderB. FlareC. CompressionD. Union
Definition
 A. Solder
Term
 Fire demand can account for what percent of the total capacity of a storage system?A. 20%B. 30%C. 40%D. 50%
Definition
 D. 50%
Term
 Which type of piping is most resistant to corrosion?A. PlasticB. Stainless SteelC. ConcreteD. Asbestos-cement
Definition
 A. Plastic
Term
 Which of the following metals make the best anode?A. BrassB. Cast ironC. ZincD. Copper
Definition
 C. Zinc
Term
 What is the minimum contact time when using the chlorine tablet method of disinfection?A. 6 hoursB. 12 hoursC. 18 hoursD. 24 hours
Definition
 D. 24 hours
Term
 Piping containing reclaimed water should be painted what color?A. OrangeB. YellowC. PurpleD. Red
Definition
 C. Purple
Term
 What is the pounds per sq inch pressure at the bottom of a tank if the water level is 38.29 ft?A. 7.3 psiB. 16.6 psiC. 53.9 psiD. 88.4 psi
Definition
 B. 16.6 psi
Term
 If a trench is 644 ft long, 3.5 ft wide, and 5.0 ft deep, approximately how many cubic yards of soil were excavated?A. 140 cu ydB. 300 cu ydC. 420 cu ydD. 450 cu yd
Definition
 C. 420 cu yd
Term
 Calculate the average pH given the following data:1= 7.45 2=7.49 3=7.56 4=7.63 5=7.60 6=7.54 7=7.53 8=7.41A. 7.4B. 7.5C. 30.1D. 60.2
Definition
 B. 7.5
Term
 What percent is 34,411 of 74,818?A. 34.411%B. 45.993%C. 74.818%D. 217.42%
Definition
 B. 45.993%
Term
 A solution was found to be 63.5% calcium hypochlorite. What is the milligrams per liter of calcium hypochlorite in the solution?A. 1,000B. 10,000C. 63,500D. 635,000
Definition
 D. 635,000 mg/L
Term
 What is the diameter of a tank with a circumference of 408.2 ft?A. 31 ftB. 130 ftC. 260 ftD. 1,282 ft
Definition
 B. 130 ft
Term
 What is the difference between weak acid & strong acid?A. Amount of hydrogen ions releasedB. Amount of buffering releasedC. Amount of Hydroxyl ions releasedD. Amount of carbonate ions released
Definition
 A. Amount of hydrogen ions released
Term
 Which of the following analytical tests is the most important?A. Coliform bacteriaB. IronC. ManganeseD. Hardness
Definition
 A. Coliform bacteria
Term
 Fuels, oils, gasoline, and other organic compounds may permeate which tpe of piping?A. PlasticB. Asbestos-concreteC. FiberglassD. Concrete
Definition
 A. Plastic
Term
 How long should a new tank be disinfected before a water sample is collected for coliform analysis?A. 6 hoursB. 12 hoursC. 24 hoursD. 48 hours
Definition
 C. 24 hours
Term
 What type of concrete reservoir is constructed much like a swimming pool, it is rather shallow, and difficult to cover?A. Cast-in-place concreteB. Hydraulically applied concrete-linedC. Circular prestressed-concreteD. Prestressed concrete-wire-wou
Definition
 A. Cast-in-place concrete
Term
 Which of the following types of valves is the best to use to maintain the water level in a tank?A. AltitudeB. TappingC. ButterflyD. Needle
Definition
 A. Altitude
Term
 Why should isolation valves be installed at frequent intervals in distribution piping?A. To stop water from flowing backward thrugh a pump that is not in operationB. To throttle flow and maintain a lower pressure in the lower distribution system zone
Definition
 D. So that small sections of water main may be shut off for maintenance
Term
 What is the internal surface area of a cylindrical tank (bottom, top, and the cylindaer wall), if it is 125.0 ft in diameter and 48.5 ft high?A. 6,063 sq ftB. 19,063 sq ftC. 24,531 sq ftD. 43,567 sq ft
Definition
 D. 43,567 sq ft
Term
 A trench that averages 4.2 ft wide & 5.4 ft in depth is dug for the purpose of installing a 24-in diameter pipeline. If the trench is 1,287 ft long, how much soil in cubic feet will be put into the trench after the pipe is in place, assuming that the onl
Definition
 C. 25,000 cu ftVolume,cu ft=(L)(W)(D) (Soil Removed)Volume, cu ft=(.785)(D2)(Length) (Volume pipe Occupies)
Term
 Customers usually notice turbidity readings in excess of how many nephelometric turbidity units?A. 2B. 3C. 4D. 5
Definition
 D. 5
Term
 What is the recommended chlorine dosage when disinfecting a water main using the tablet method?A. 25 mg/LB. 50 mg/LC. 75 mg/LD 100 mg/L
Definition
 B. 50 mg/L
Term
 What water quality problem is most likely to occur at dead-end water mains?A. Dirty WaterB. Taste & OdorC. Milky Water due to air bubblesD. Dirty Clothes due to manganese
Definition
 B. Taste & Odor
Term
 Asbestos-cement pipe contains which of the following material?A. FiberglassB. Silica sandC. PolyethyleneD. Silica lime
Definition
 B. Silica sand. Portland cement & asbestos fibers are also used in asbestos-cement pipes.
Term
 What is the primary purpose of well grouting?A. Protect the well casing from corrosionB. Seal off poor-quality aquifersC. Prevent surface water contamination from entering the water that is being drawn into the wellD. Protect the casing by restrai
Definition
 C. Prevent surface water contamination from entering the water that is being drawn into the well
Term
 Which type of butterfly valve connection is best to use underground?A. Mechanical JointB. Flanged JointC. Lug wafer jointD. Check joint
Definition
 A. Mechanical joint
Term
 What type of concrete tank is made like a home basement but with more reinforcements?A. Cast-in place concreteB. Hydraulically applied concrete-linedC. Circular prestressed-concreteD. Prestressed concrete-wire-wound
Definition
 A. Cast-in place concrete
Term
 The pressure a the lowest bottm point of a clear well is 13.2 psi. What is the total water depth of the clear well at its lowest point?A. 23.1 ftB. 30.5 ftC. 61.0 ftD. 69.3 ft
Definition
 B. 30.5 ftPressure,psi=depth of water (divided by) 2.31 ft/psi
Term
 How many hours must the water remain undisturbed in a pipe before collecting a sample for lead and copper analysis?A. 4 hoursB. 6 hoursC. 8 hoursD. 24 hours
Definition
 B. 6 hours
Term
 When present in water, which of the following will increase corrosion rates?A. Zinc OrthophosphateB. Dissolved OxygenC. Silicate compoundsD. Bicarbonate ion
Definition
 B. Dissolved Oxygen
Term
 What is the recommended chlorine dosage when disinfecting a water main using the slug method?A. 50 mg/LB. 100 mg/LC. 125 mg/LD. 300 mg/L
Definition
 D. 300 mg/L
Term
 If a confined aquifer's recharge area is elevated, the water in the aquifer will be _________?A. ContaminatedB. High in iron & manganeseC. Under pressureD. Soft
Definition
 C. Under pressure
Term
 Which one of the following service line materials may cause corrosion when connected to brass valves?A. Galvanized IronB. PVCC. CopperD. Plastic
Definition
 A. Galvanized iron
Term
 When is the best time to conduct a leak survey?A. Night when noise is lowestB. During low water usageC. When the ground has been dry a whileD. During periods of high water usage
Definition
 A. Night when noise is lowest
Term
 PVC pipe can use Tees, elbows, and other fittings from what other type of pipe?A. Prestressed concrete cylinderB. Ductile ironC. ConcreteD. Asbestos-cement
Definition
 B. Ductile iron
Term
 Water use for peak hour demand is determined by the highest 1-hour period during one __________?A. DayB. WeekC. MonthD. Year
Definition
 D. Year
Term
 The zone of influence is defined as the ____________?A. Distance from a well that the cone of depression affects the normal water levelB. Depression around a well of the water surface caused by pumping water from the wellC. Change in water elevation
Definition
 A. Distance from a well that the cone of depression affects the normal water level
Term
 The secondary standard for iron recommends that the concentration not exceed __________?A. 0.30 mg/LB. 0.40 mg/LC. 0.50 mg/LD. 0.60 mg/L
Definition
 A. 0.30 mg/L
Term
 What is the name of the pipe that serves as the inlet and outlet to an elevated tank?A. PedestalB. RiserC. Main PedestalD. Service
Definition
 B. Riser
Term
 What type of ductile-iron pipe joint is quickly assembled and is the least expensive?A. Flanged jointB. Mechanical jointC. Push-on jointD. Ball-and-socket Joint
Definition
 C. Push-on joint
Term
 Where are the most common location of leaks on old service connections?A. Household plumbingB. Connections to the curb stopC. Connections at the gate valveD. Pressure regulator
Definition
 B. Connections to the curb stop
Term
 Which of the following best defines the term "drawdown"?A. Water level in a well after a pump has operated over a period of timeB. Change in water elevation from the normal level to the pumping levelC. Distance from a well that the cone of depressio
Definition
 B. Change in water elevation from the normal level to the pumping level
Term
 Which style of curb box eliminates the possibility of misalignment?A. Arch StyleB. Montgomery styleC. Minneapolis styleD. Chicago Style
Definition
 C. Minneapolis Style
Term
 What is the term for the height to which a column of water will rise in a well?A. Potentiometric surfaceB. Groundwater levelC. Piezometric surfaceD. Residual drawdown
Definition
 C. Piezometric surface
Term
 Which of the following determines the number of samples that must be collected for utilities that are monitoring for lead & copper for the first time?A. System SizeB. Type of water sourceC. Amount of water producedD. Area Served
Definition
 A. System Size
Supporting users have an ad free experience!