Water Distribution UPDATED ACTUAL Questions and CORRECT
Answers
Question: Potable water may be defined as
Correct Answer: a. Any water that occasionally may be polluted from another source b. Any water that,
according to recognized standards, is safe for consumption c. Water high in organic content d. Water that
has been transported from outside the service area: b). Any water that according to recognized standard is
safe for human consumption.
Question: To prevent the entry of surface contamination into a well is the purpose of
Correct Answer: a. The well casing b. The louvers or slots c. Well development d. The sanitary seal: d)
The Sanitary Seal
Question: Pure water will exhibit a pH value of? a. 0.0 b. 7.0 c. 10.5 d. 14.0
Correct Answer: b) 7.0
Question: A pH reading of 6.0 units indicates that the water sample is
Correct Answer: a. Very acidic b. Slightly alkaline c. Very alkaline d. Slightly acidic: d) Slightly Acidic
Question: In drinking water quality, "TDS" is the abbreviation for? a)Total digestable substances b) Total
dissolved solids c) Time-delayed sicknesses d) Terminal diseases started
Correct Answer: b) Total Dissolved Solids
Question: In drinking water regulations, the abbreviation "MCL" stands for? a) Maximum contaminant
level b) Multiple constituent levels c) Most common level d) Minimum considered legal
Correct Answer: a) Maximum contaminant level
Question: The MBAS method is used to determine levels of which of the following drinking water
constituents?
Correct Answer: Forming Agent
Question: In water quality, the symbol "mg/L" is equivalent to
Correct Answer: a. Micrograms per liter b. Parts per million c. Parts per billion d. Mostly good levels: b)
Parts per million
Question: The term "clearwell" refers to a?
Correct Answer: Reservoir at the outlet of a water treatment plant.
Question: A mechanical device often employed to prevent the over-filling and/ on over-draining of
distribution system reservoir is the?
Correct Answer: Altitude Valve
Question: The primary cause of water quality deterioration in distribution system is?
Correct Answer: Water age
Question: The top of the pipe is called?
Correct Answer: Soffit
,Question: The term "Springline" applies to?
Correct Answer: The midline of a pipeline
Question: When possible, a water main should be tapped while still pressurized to?
Correct Answer: Minimize contamination risk
Question: A connection made into a water main that is full of under pressure is called a? a. Cross
connection b. Valve box c. Wet tap d. Spinal tap
Correct Answer: c) Wet tap
Question: A special valve that is used almost exclusively to facilitate making connections to pipeline is
the? a. Gate valve b. Corporation stop c. Altitude valve d. Auxiliary valve
Correct Answer: b) Corporation Stop
Question: Which of the following gases will deaden the sense of smell? a. Carbon dioxide b. Hydrogen
sulfide c. Methane d. Oxygen
Correct Answer: b) Hydrogen Sulfide
Question: The most commonly used meter on small domestic services? a. Venturi meter b. Propeller meter
c. Orifice plate meter d. Nutating disc meter
Correct Answer: d) Nutating Disk Meter
Question: Of the following, which is a positive displacement flow rate meter?
Correct Answer: Nutating Disk
Question: A Nutating disk is found in certain? a. Positive displacement pumps b. Main line valves c.
Chemical feeders d. Water meters
Correct Answer: d) Water meters
Question: A pump is experiencing back-spin after it is shut down. What is the most likely cause?
Correct Answer: Malfunction check valve
Question: When fully open, which of the following valve types will have the highest friction loss? a. Gate
valve b. Globe valve c. Ball valve d. All will have about the same friction loss.
Correct Answer: b) Glove valve
Question: The main purpose of a butterfly valve in a water distribution system is for?
Correct Answer: Isolation
Question: The most likely means of connecting two pressure zone is through a?
Correct Answer: Pressure reducing valve
Question: The purpose of an air relief valve is to?
Correct Answer: Protect the pipe system
Question: Which of the following devices is routinely used to reduce system pressure?-
Correct Answer: Globe valve
Question: A venture or a weir is a device that is used to ?
, Correct Answer: Measured water flow
Question: The most common valve in water distribution system is the? a. Gate valve b. Butterfly valve c.
Check valve d. Globe valve
Correct Answer: a) Gate valve
Question: Venturi meters operate under the principle of?
Correct Answer: Pressure differential
Question: An auxiliary valve is always located adjacent to a?
Correct Answer: Fire Hydrants
Question: If you encounter a liquid chlorine leak in a one-ton container. What action should you take first,
to reduce the severity of the leak? a. Apply a caustic solution b. Spray the container with water c. Spray the
container with an ammonia solution d. Rotate the container to place the leak at the top
Correct Answer: d) Rotate the container to place the leak at the top
Question: The most commonly used water disinfectant in the United States is? a. Chlorine Dioxide b.
Ozone c. Chlorine and Ammonia (chloramines) d. Chlorine
Correct Answer: d) Chlorine
Question: When collecting a distribution system sample, the water should be allowed to run for a period of
time prior to sample collection. This period of time is? a. At least two minutes b. At least five minutes c. At
least thirty minutes d. As long as necessary to permit clearing of the service line
Correct Answer: d) As long as necessary to permit clearing of the service line
Question: Sample bottles which are furnished by a certified laboratory for collection of bacteriological
same? a. Should be rinsed with the water to be sampled before use b. Should be rinsed with a chlorine
solution before use c. Should be rinsed with distilled water before use d. Are ready to use
Correct Answer: d) Ready to use
Question: A device that automatically shuts off flow into an elevated storage tank when water level in the
tank reaches a preset level is termed a? a. Air / vacuum relief valve b. Wet-barrel hydrant c. Altitude valve
d. Angle valve
Correct Answer: c) Altitude valve
Question: Call 811 if digging and must notify?
Correct Answer: 48 hrs
Question: red
Correct Answer: Electric Power line, Cable Conduit and Lighting
Question: Yellow
Correct Answer: Gas, Oil, Stream, Petroleum, or Gasesous Materials
Question: Orange
Correct Answer: Communications, Alarm or Signal Lines, or Conduit
Question: Purple
Answers
Question: Potable water may be defined as
Correct Answer: a. Any water that occasionally may be polluted from another source b. Any water that,
according to recognized standards, is safe for consumption c. Water high in organic content d. Water that
has been transported from outside the service area: b). Any water that according to recognized standard is
safe for human consumption.
Question: To prevent the entry of surface contamination into a well is the purpose of
Correct Answer: a. The well casing b. The louvers or slots c. Well development d. The sanitary seal: d)
The Sanitary Seal
Question: Pure water will exhibit a pH value of? a. 0.0 b. 7.0 c. 10.5 d. 14.0
Correct Answer: b) 7.0
Question: A pH reading of 6.0 units indicates that the water sample is
Correct Answer: a. Very acidic b. Slightly alkaline c. Very alkaline d. Slightly acidic: d) Slightly Acidic
Question: In drinking water quality, "TDS" is the abbreviation for? a)Total digestable substances b) Total
dissolved solids c) Time-delayed sicknesses d) Terminal diseases started
Correct Answer: b) Total Dissolved Solids
Question: In drinking water regulations, the abbreviation "MCL" stands for? a) Maximum contaminant
level b) Multiple constituent levels c) Most common level d) Minimum considered legal
Correct Answer: a) Maximum contaminant level
Question: The MBAS method is used to determine levels of which of the following drinking water
constituents?
Correct Answer: Forming Agent
Question: In water quality, the symbol "mg/L" is equivalent to
Correct Answer: a. Micrograms per liter b. Parts per million c. Parts per billion d. Mostly good levels: b)
Parts per million
Question: The term "clearwell" refers to a?
Correct Answer: Reservoir at the outlet of a water treatment plant.
Question: A mechanical device often employed to prevent the over-filling and/ on over-draining of
distribution system reservoir is the?
Correct Answer: Altitude Valve
Question: The primary cause of water quality deterioration in distribution system is?
Correct Answer: Water age
Question: The top of the pipe is called?
Correct Answer: Soffit
,Question: The term "Springline" applies to?
Correct Answer: The midline of a pipeline
Question: When possible, a water main should be tapped while still pressurized to?
Correct Answer: Minimize contamination risk
Question: A connection made into a water main that is full of under pressure is called a? a. Cross
connection b. Valve box c. Wet tap d. Spinal tap
Correct Answer: c) Wet tap
Question: A special valve that is used almost exclusively to facilitate making connections to pipeline is
the? a. Gate valve b. Corporation stop c. Altitude valve d. Auxiliary valve
Correct Answer: b) Corporation Stop
Question: Which of the following gases will deaden the sense of smell? a. Carbon dioxide b. Hydrogen
sulfide c. Methane d. Oxygen
Correct Answer: b) Hydrogen Sulfide
Question: The most commonly used meter on small domestic services? a. Venturi meter b. Propeller meter
c. Orifice plate meter d. Nutating disc meter
Correct Answer: d) Nutating Disk Meter
Question: Of the following, which is a positive displacement flow rate meter?
Correct Answer: Nutating Disk
Question: A Nutating disk is found in certain? a. Positive displacement pumps b. Main line valves c.
Chemical feeders d. Water meters
Correct Answer: d) Water meters
Question: A pump is experiencing back-spin after it is shut down. What is the most likely cause?
Correct Answer: Malfunction check valve
Question: When fully open, which of the following valve types will have the highest friction loss? a. Gate
valve b. Globe valve c. Ball valve d. All will have about the same friction loss.
Correct Answer: b) Glove valve
Question: The main purpose of a butterfly valve in a water distribution system is for?
Correct Answer: Isolation
Question: The most likely means of connecting two pressure zone is through a?
Correct Answer: Pressure reducing valve
Question: The purpose of an air relief valve is to?
Correct Answer: Protect the pipe system
Question: Which of the following devices is routinely used to reduce system pressure?-
Correct Answer: Globe valve
Question: A venture or a weir is a device that is used to ?
, Correct Answer: Measured water flow
Question: The most common valve in water distribution system is the? a. Gate valve b. Butterfly valve c.
Check valve d. Globe valve
Correct Answer: a) Gate valve
Question: Venturi meters operate under the principle of?
Correct Answer: Pressure differential
Question: An auxiliary valve is always located adjacent to a?
Correct Answer: Fire Hydrants
Question: If you encounter a liquid chlorine leak in a one-ton container. What action should you take first,
to reduce the severity of the leak? a. Apply a caustic solution b. Spray the container with water c. Spray the
container with an ammonia solution d. Rotate the container to place the leak at the top
Correct Answer: d) Rotate the container to place the leak at the top
Question: The most commonly used water disinfectant in the United States is? a. Chlorine Dioxide b.
Ozone c. Chlorine and Ammonia (chloramines) d. Chlorine
Correct Answer: d) Chlorine
Question: When collecting a distribution system sample, the water should be allowed to run for a period of
time prior to sample collection. This period of time is? a. At least two minutes b. At least five minutes c. At
least thirty minutes d. As long as necessary to permit clearing of the service line
Correct Answer: d) As long as necessary to permit clearing of the service line
Question: Sample bottles which are furnished by a certified laboratory for collection of bacteriological
same? a. Should be rinsed with the water to be sampled before use b. Should be rinsed with a chlorine
solution before use c. Should be rinsed with distilled water before use d. Are ready to use
Correct Answer: d) Ready to use
Question: A device that automatically shuts off flow into an elevated storage tank when water level in the
tank reaches a preset level is termed a? a. Air / vacuum relief valve b. Wet-barrel hydrant c. Altitude valve
d. Angle valve
Correct Answer: c) Altitude valve
Question: Call 811 if digging and must notify?
Correct Answer: 48 hrs
Question: red
Correct Answer: Electric Power line, Cable Conduit and Lighting
Question: Yellow
Correct Answer: Gas, Oil, Stream, Petroleum, or Gasesous Materials
Question: Orange
Correct Answer: Communications, Alarm or Signal Lines, or Conduit
Question: Purple
