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Water Distribution Test / Actual Test
Questions & Certified Answers,
_____________Quiz____________? Distribution systems are usually laid out in which of the following patterns besides Tree shaped and Grid designs? a. Loops and/or circular designs b. Vertical designs without backflow prevention devices c. Horizontal lines that flow into open ponds then back into a closed pipe d. Horizontal lines that flow into underground sumps then back into a closed pipe -
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a. Loops and/or circular designs _____________Quiz____________? Dead ends in a system are usually located on a. Loops and/or circular designs b. Tree shaped and Grid designs c. Oval designs d. transmission mains e. Cul de Sac's with return lines -
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b. Tree shaped and Grid designs
_____________Quiz____________? An operator may refer to Piezometric elevation, static head, or pressure head as a. horizontal water elevation b. water pressure from a pump c. maximum pressure from a fire hydrant d. vertical water column height -
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d. vertical water column height _____________Quiz____________? A downstream closed sectionalizing valve without pressure reducing valves in the system will have which of the following pressures placed upon it? a. the water surface elevation from the last point where the water is open to the atmosphere b. the back pressures from a downstream point c. the downstream booster pump operation d. the operation of a fire hydrant located immediately downstream of the hydrant -
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a. the water surface elevation from the last point where the water is open to the atmosphere _____________Quiz____________? What is the main purpose of a water storage facility? a. to allow storage reserve during wet periods b. to help maintain adequate pressures throughout the entire system c. to meet needs for fire protection
_____________Quiz____________? Chlorine may be added to water in a continuous, slug, and/or the _______ method to initially disinfect a pipeline? a. segmented b. tablet c. low dose d. air injection -
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b. tablet _____________Quiz____________? Wear rings in a centrifugal pump are designed to a. prevent excessive internal water circulation between the suction and discharge sides of a pump b. prevent wear of the impeller and inside case c. allow excessive internal water circulation to occur between the suction and discharge d. both a & b are correct, but not c -
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d. both a & b are correct, but not c _____________Quiz____________? Packing ring notches in a centrifugal type pump should be ______ when placed in the stuffing box? a. water tight b. staggered 90ยบ
c. made of rubber not metal d. heated -
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b. staggered 90ยบ _____________Quiz____________? Eighty parts per billion (80 ppb) is equal to which of the following? a. 8 ppm b. 0.8 mg/L c. 0.08 mg/L d. 80 mg/L -
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c. 0.08 mg/L _____________Quiz____________? A mass of concrete placed at bends and valve structures to prevent pipeline movement is commonly called a a. thrust block c. curb stop b. corp stop d. service block -
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a. thrust block
c. wellhead protection d. leaking backflow prevention equipment -
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d. leaking backflow prevention equipment _____________Quiz____________? What type of meter is used when the water flow widely fluctuates? a. Nutating-disc (nodding) meters b. Compound meters c. Proportional meters d. Venturi meters -
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b. Compound meters _____________Quiz____________? What are the basic requirements for an acceptable meter installation? a. leakage rate kept to a minimum b. always be in the public's view c. position in a horizontal plane, not tilted d. be inaccessible for service and inspection e. hid behind a fence near dog confinement areas -
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c. position in a horizontal plane, not tilted
_____________Quiz____________? How can mechanical damage to water meters be avoided? a. Placing the meter behind the curb and in a meter box b. Place the meter on top of a hydrant c. Grow shrubs around the meter d. Hide the meter behind an electrical utility pole -
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Placing the meter behind the curb and in a meter box _____________Quiz____________? Which of the following is a displacement meter? a. Venturi b. Piston c. Compound d. Sonic meter -
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b. Piston _____________Quiz____________? The C-Factor relates to a. a factor used to indicate the smoothness of the interior of a pipe b. the elevation of the invert of a pipeline c. a line that represents the elevation of energy head of water d. a water service shutoff valve -
b. 25% c. 18.5% -
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a. 75% _____________Quiz____________? Out of all the water on earth, which of the following is the approximate amount percentage of freshwater that is immediately available to humans? a. less than 1% (actually 0.34%) b. 20% c. 97% d. 2% -
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a. less than 1% (actually 0.34%) _____________Quiz____________? The term associated with water that evaporates from living plants is referred to as a. evapotranspiration b. condensation c. precipitation d. transpiration -
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a. evapotranspiration
_____________Quiz____________? Of all the water on earth, which of the following percentages represent the amount of saltwater on earth? a. 25% b. 75% c. 90% d. 97% -
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d. 97% _____________Quiz____________? When sampling for bacteria in a distribution system, the bacteria sample bottle is prepared with which chemical inside the bottle before it is sterilized? a. copper sulfate b. chlorine tablets c. sodium thiosulfate d. hydrochloric acid -
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c. sodium thiosulfate _____________Quiz____________? The primary purpose of disinfection of water mains is to a. kill disease causing organisms in the water, if present b. sterilize the water main
Chlorine gas is considered to be 100% pure, bleach is approximately 5 ยผ % pure, while HTH dry powder chlorine is set at _____ % purity. a. 20% b. 45% c. 65% d. 80% -
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c. 65% _____________Quiz____________? When a 150-pound chlorine cylinder fitting slightly leaks around the gasket material, a gauze like material soaked in _______ should be used below the fittings to confirm the leak at the joint. a. chlorine dioxide b. sodium thiosulfate c. ammonia water d. oil -
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c. ammonia water _____________Quiz____________? A commonly used method to test for chlorine residual in water is called the _____ method. a. HTH b. THM c. VOC
d. DPD -
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d. DPD _____________Quiz____________? As the pump shaft protrudes through the pump case, a mesh ring can be placed and compressed to prevent excessive leakage. This ring is commonly called the a. mechanical ring b. packing ring c. free ring d. bearing ring -
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b. packing ring _____________Quiz____________? When chlorine gas is added to water the pH goes down due to a. chlorine gas producing caustic substances b. two base materials that form c. two acids that form d. caustic soda being formed in the water -
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c. two acids that form _____________Quiz____________?
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b. close the discharge valve _____________Quiz____________? Circular devices placed in the stuffing box of a centrifugal pump to prevent or limit air from entering the flow stream is called a a. lantern ring b. packing ring c. mechanical ring d. throttling ring -
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a. lantern ring _____________Quiz____________? When an operator isolates a motor from an operable system for repair, it is vital that he/she follow a ________/________ procedure. a. pumps/motors b. Ohms/Watts c. lock-out/tag-out d. AC/DC -
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c. lock-out/tag-out _____________Quiz____________?
Horsepower is defined as ______________ ft-lbs per minute or 746 watts a. 8. b. 0.785 D c. 33, d. 43,560 -
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c. 33, _____________Quiz____________? The rated flow of a water meter, as stated by the manufacturer, is based upon which type of flow? a. intermittent b. short-time peak c. continuous d. the maximum capacity at peak flow -
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c. continuous _____________Quiz____________? What is the minimum setback distance for fire hydrants to avoid large vehicle overhang? a. 1 ยฝ - feet b. 2-feet c. 3-feet d. 3.5-feet -
b. build another storage facility c. coordinate and plan the shutdown, so that the distribution system will be able to meet customer's demands d. build up the water pressure and save it -
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c. coordinate and plan the shutdown, so that the distribution system will be able to meet customer's demands _____________Quiz____________? The three main components of a centrifugal pump are a. propeller, motor, and wiring harness b. wear rings, lantern rings, and volute c. impeller, case, and shaft d. shaft, wear rings, and AC power connection -
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c. impeller, case, and shaft _____________Quiz____________? Below ground storage tanks are vulnerable in having which of the following? a. high pressures within the tank b. insects and root damage c. sunlight penetration that reduces chlorine residuals d. high total dissolved solid content -
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b. insects and root damage _____________Quiz____________? The pipeline flushing process tends to remove most deposits, encrustations, sediments and other debris. Customers should be notified to expect _________ after the flushing operation is completed. a. a residual amount of sediment coming into the dwelling for at least a few hours, so it would be best to flush their own lines when noticed b. hot water c. pure water d. to boil their water for at least one-week -
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a. a residual amount of sediment coming into the dwelling for at least a few hours, so it would be best to flush their own lines when noticed _____________Quiz____________? The hydrologic cycle is composed of all the following terms, except a. condensation b. evaporation d. precipitation c. percolation e. adsorption -
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e. adsorption
