Water Distribution Full Test With All
Answers Correct| Verified
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 - Ans--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 - Ans--d) The Sanitary Seal
Pure water will exhibit a pH value of?
a. 0.0
b. 7.0
c. 10.5
d. 14.0 - Ans--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 - Ans--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 - Ans--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 - Ans--a) Maximum contaminant level
The MBAS method is used to determine levels of which of the following
drinking water constituents? - Ans--Forming Agent
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 - Ans--b) Parts per million
The term "clearwell" refers to a? - Ans--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? - Ans--Altitude Valve
The primary cause of water quality deterioration in distribution system is? -
Ans--Water age
The term "Springline" applies to? - Ans--The midline of a pipeline
When possible, a water main should be tapped while still pressurized to? -
Ans--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 - Ans--c) Wet tap
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 - Ans--b) Corporation Stop
Which of the following gases will deaden the sense of smell?
a. Carbon dioxide
b. Hydrogen sulfide
c. Methane
d. Oxygen - Ans--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 - Ans--d) Nutating Disk Meter
A Nutating disk is found in certain?
a. Positive displacement pumps
b. Main line valves
c. Chemical feeders
d. Water meters - Ans--d) Water meters
, A pump is experiencing back-spin after it is shut down. What is the most
likely cause? - Ans--Malfunction check valve
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. - Ans--b) Globe valve
The main purpose of a butterfly valve in a water distribution system is for? -
Ans--Isolation
The most likely means of connecting two pressure zone is through a? -
Ans--Pressure reducing valve
Which of the following devices is routinely used to reduce system
pressure? - Ans--Globe valve
A venture or a weir is a device that is used to ? - Ans--Measured water flow
The most common valve in water distribution system is the?
a. Gate valve
b. Butterfly valve
c. Check valve
d. Globe valve - Ans--a) Gate valve
Venturi meters operate under the principle of? - Ans--Pressure differential
An auxiliary valve is always located adjacent to a? - Ans--Fire Hydrants
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
Answers Correct| Verified
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 - Ans--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 - Ans--d) The Sanitary Seal
Pure water will exhibit a pH value of?
a. 0.0
b. 7.0
c. 10.5
d. 14.0 - Ans--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 - Ans--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 - Ans--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 - Ans--a) Maximum contaminant level
The MBAS method is used to determine levels of which of the following
drinking water constituents? - Ans--Forming Agent
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 - Ans--b) Parts per million
The term "clearwell" refers to a? - Ans--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? - Ans--Altitude Valve
The primary cause of water quality deterioration in distribution system is? -
Ans--Water age
The term "Springline" applies to? - Ans--The midline of a pipeline
When possible, a water main should be tapped while still pressurized to? -
Ans--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 - Ans--c) Wet tap
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 - Ans--b) Corporation Stop
Which of the following gases will deaden the sense of smell?
a. Carbon dioxide
b. Hydrogen sulfide
c. Methane
d. Oxygen - Ans--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 - Ans--d) Nutating Disk Meter
A Nutating disk is found in certain?
a. Positive displacement pumps
b. Main line valves
c. Chemical feeders
d. Water meters - Ans--d) Water meters
, A pump is experiencing back-spin after it is shut down. What is the most
likely cause? - Ans--Malfunction check valve
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. - Ans--b) Globe valve
The main purpose of a butterfly valve in a water distribution system is for? -
Ans--Isolation
The most likely means of connecting two pressure zone is through a? -
Ans--Pressure reducing valve
Which of the following devices is routinely used to reduce system
pressure? - Ans--Globe valve
A venture or a weir is a device that is used to ? - Ans--Measured water flow
The most common valve in water distribution system is the?
a. Gate valve
b. Butterfly valve
c. Check valve
d. Globe valve - Ans--a) Gate valve
Venturi meters operate under the principle of? - Ans--Pressure differential
An auxiliary valve is always located adjacent to a? - Ans--Fire Hydrants
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
