1
Water Distribution Questions with Answers
(100% Correct Answers)
Potable water may be defined as:
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 Answer: b).
Any water that according to recognized standard is safe for human
consumption.
To prevent the entry of surface contamination into a well is the purpose of:
a. The well casing
b. The louvers or slots
c. Well development
d. The sanitary seal Answer: d) The Sanitary Seal
Pure water will exhibit a pH value of?
a. 0.0
b. 7.0
c. 10.5
,2
d. 14.0 Answer: b) 7.0
A pH reading of 6.0 units indicates that the water sample is:
a. Very acidic
b. Slightly alkaline
c. Very alkaline
d. Slightly acidic Answer: d) Slightly Acidic
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 Answer: b) Total Dissolved Solids
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 Answer: a) Maximum contaminant level
The MBAS method is used to determine levels of which of the following
drinking water constituents? Answer: Forming Agent
,3
In water quality, the symbol "mg/L" is equivalent to:
a. Micrograms per liter
b. Parts per million
c. Parts per billion
d. Mostly good levels Answer: b) Parts per million
The term "clearwell" refers to a? Answer: Reservoir at the outlet of a water
treatment plant.
A mechanical device often employed to prevent the over-filling and/ on over-
draining of distribution system reservoir is the? Answer: Altitude Valve
The primary cause of water quality deterioration in distribution system is?
Answer: Water age
The top of the pipe is called? Answer: Soffit
The term "Springline" applies to? Answer: The midline of a pipeline
When possible, a water main should be tapped while still pressurized to?
Answer: Minimize contamination risk
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 Answer: c) Wet tap
, 4
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 Answer: b) Corporation Stop
Which of the following gases will deaden the sense of smell?
a. Carbon dioxide
b. Hydrogen sulfide
c. Methane
d. Oxygen Answer: b) Hydrogen Sulfide
The most commonly used meter on small domestic services?
a. Venturi meter
b. Propeller meter
c. Orifice plate meter
d. Nutating disc meter Answer: d) Nutating Disk Meter
Of the following, which is a positive displacement flow rate meter? Answer:
Nutating Disk
A Nutating disk is found in certain?
Water Distribution Questions with Answers
(100% Correct Answers)
Potable water may be defined as:
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 Answer: b).
Any water that according to recognized standard is safe for human
consumption.
To prevent the entry of surface contamination into a well is the purpose of:
a. The well casing
b. The louvers or slots
c. Well development
d. The sanitary seal Answer: d) The Sanitary Seal
Pure water will exhibit a pH value of?
a. 0.0
b. 7.0
c. 10.5
,2
d. 14.0 Answer: b) 7.0
A pH reading of 6.0 units indicates that the water sample is:
a. Very acidic
b. Slightly alkaline
c. Very alkaline
d. Slightly acidic Answer: d) Slightly Acidic
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 Answer: b) Total Dissolved Solids
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 Answer: a) Maximum contaminant level
The MBAS method is used to determine levels of which of the following
drinking water constituents? Answer: Forming Agent
,3
In water quality, the symbol "mg/L" is equivalent to:
a. Micrograms per liter
b. Parts per million
c. Parts per billion
d. Mostly good levels Answer: b) Parts per million
The term "clearwell" refers to a? Answer: Reservoir at the outlet of a water
treatment plant.
A mechanical device often employed to prevent the over-filling and/ on over-
draining of distribution system reservoir is the? Answer: Altitude Valve
The primary cause of water quality deterioration in distribution system is?
Answer: Water age
The top of the pipe is called? Answer: Soffit
The term "Springline" applies to? Answer: The midline of a pipeline
When possible, a water main should be tapped while still pressurized to?
Answer: Minimize contamination risk
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 Answer: c) Wet tap
, 4
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 Answer: b) Corporation Stop
Which of the following gases will deaden the sense of smell?
a. Carbon dioxide
b. Hydrogen sulfide
c. Methane
d. Oxygen Answer: b) Hydrogen Sulfide
The most commonly used meter on small domestic services?
a. Venturi meter
b. Propeller meter
c. Orifice plate meter
d. Nutating disc meter Answer: d) Nutating Disk Meter
Of the following, which is a positive displacement flow rate meter? Answer:
Nutating Disk
A Nutating disk is found in certain?
