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Water Distribution Exam Bundle Questions and Answers (RATED A+)
Water Distribution Exam Bundle Questions and Answers (RATED A+)
[Show more]Water Distribution Exam Bundle Questions and Answers (RATED A+)
[Show more]Most of Earth's water is _____. - ANSWER-unsuitable for drinking 
 
most of earths freshwater is______ - ANSWER-Stored in glaciers and ice caps 
 
most saltwater use is____ - ANSWER-the power generating industry 
 
scarcity - ANSWER-state of not having enough of something 
 
Groundwater_________ - ...
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Add to cartMost of Earth's water is _____. - ANSWER-unsuitable for drinking 
 
most of earths freshwater is______ - ANSWER-Stored in glaciers and ice caps 
 
most saltwater use is____ - ANSWER-the power generating industry 
 
scarcity - ANSWER-state of not having enough of something 
 
Groundwater_________ - ...
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 
d. 14.0 - ANSWER-b) 7.0 
 
A pH r...
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Add to cartTo 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 
d. 14.0 - ANSWER-b) 7.0 
 
A pH r...
how can you produce pressurized water? - ANSWER-push inward on the water, using a surface 
- confine and squeeze it 
 
as you push inward on the water - ANSWER-- it pushes outward on you 
 
you do work as you pump water into the pipe - ANSWER-work = pressure x volume 
- the pressurized water carries...
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Add to carthow can you produce pressurized water? - ANSWER-push inward on the water, using a surface 
- confine and squeeze it 
 
as you push inward on the water - ANSWER-- it pushes outward on you 
 
you do work as you pump water into the pipe - ANSWER-work = pressure x volume 
- the pressurized water carries...
Name three classifications of distribution system layouts - ANSWER-1. arterial loop system 
2. grid system 
3. tree system 
 
Where in the distribution system should shut off valves be? - ANSWER-At regular intervals and at all branches from the arterial main. Also, where mains intersect in a grid , ...
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Add to cartName three classifications of distribution system layouts - ANSWER-1. arterial loop system 
2. grid system 
3. tree system 
 
Where in the distribution system should shut off valves be? - ANSWER-At regular intervals and at all branches from the arterial main. Also, where mains intersect in a grid , ...
Service Pipe - ANSWER-Pipe from the street water main or other source of water supply to the building served. 
 
Water meter - ANSWER-Device used to measure in liters or gallons the amount of water that passes through the water service. 
 
Horizontal supply main - ANSWER-The principal water distribu...
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Add to cartService Pipe - ANSWER-Pipe from the street water main or other source of water supply to the building served. 
 
Water meter - ANSWER-Device used to measure in liters or gallons the amount of water that passes through the water service. 
 
Horizontal supply main - ANSWER-The principal water distribu...
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 - ANSWER-b. Tree shaped and Grid designs 
 
An operator may refer to Piezometric elevation, static head, or pres...
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Add to cartDead 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 - ANSWER-b. Tree shaped and Grid designs 
 
An operator may refer to Piezometric elevation, static head, or pres...
Major parts of water distribution - ANSWER-Pipes, storage facilities, pumping stations, valves ,fire hydrants, meters, and other appurtenances 
 
Main purpose of water storage facilities - ANSWER-To provide sufficient amount of water to average or equalize the daily demands on the water supply syste...
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Add to cartMajor parts of water distribution - ANSWER-Pipes, storage facilities, pumping stations, valves ,fire hydrants, meters, and other appurtenances 
 
Main purpose of water storage facilities - ANSWER-To provide sufficient amount of water to average or equalize the daily demands on the water supply syste...
Desalination - ANSWER-A process of removing salt from ocean water 
 
Watershed - ANSWER-the land area that drains into a river, stream, or other body of water. 
 
River Basin - ANSWER-The entire geographical area drained by a river and its tributaries 
 
Tributary - ANSWER-A stream or river that flo...
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Add to cartDesalination - ANSWER-A process of removing salt from ocean water 
 
Watershed - ANSWER-the land area that drains into a river, stream, or other body of water. 
 
River Basin - ANSWER-The entire geographical area drained by a river and its tributaries 
 
Tributary - ANSWER-A stream or river that flo...
The selective destruction or inactivation of pathogenic organisms is - ANSWER-Disinfection 
 
Pathogenic organisms can be removed from water, killed, or inactivated by - ANSWER-Filtration 
 
The most commonly used distribution system disinfection is - ANSWER-Free chlorine 
 
A greenish- yellow gas w...
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Add to cartThe selective destruction or inactivation of pathogenic organisms is - ANSWER-Disinfection 
 
Pathogenic organisms can be removed from water, killed, or inactivated by - ANSWER-Filtration 
 
The most commonly used distribution system disinfection is - ANSWER-Free chlorine 
 
A greenish- yellow gas w...
The number of monthly distribution system bacteriological samples required is - ANSWER-Based on population served 
 
what is the maximum contaminant level for total trihalomethanes (TTHM) in the US? - ANSWER-0.080 mg/L 
 
under the Surface Water Treatment rule disinfection residuals must be collecte...
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Add to cartThe number of monthly distribution system bacteriological samples required is - ANSWER-Based on population served 
 
what is the maximum contaminant level for total trihalomethanes (TTHM) in the US? - ANSWER-0.080 mg/L 
 
under the Surface Water Treatment rule disinfection residuals must be collecte...
Frequently the water supplier tries to maintain specific minimum target __________________ throughput the distribution system. - ANSWER-Water pressure (20 PSI minimum) 
 
All trenches and excavations are unsafe until... - ANSWER-Proper shoring, used, and back filled 
 
Can the quality of water comin...
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Add to cartFrequently the water supplier tries to maintain specific minimum target __________________ throughput the distribution system. - ANSWER-Water pressure (20 PSI minimum) 
 
All trenches and excavations are unsafe until... - ANSWER-Proper shoring, used, and back filled 
 
Can the quality of water comin...
As water mains and reservoirs become older, they require less and less maintenance. - ANSWER-False 
 
Routine water quality monitoring of distribution systems consists of collecting samples at remote locations in the system and testing for chlorine residual and coli forms - ANSWER-True 
 
Existing c...
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Add to cartAs water mains and reservoirs become older, they require less and less maintenance. - ANSWER-False 
 
Routine water quality monitoring of distribution systems consists of collecting samples at remote locations in the system and testing for chlorine residual and coli forms - ANSWER-True 
 
Existing c...
Cold Water Supply of the plumbing system - ANSWER-Also known as Water Distribution System, consists of the piping and fittings which supply cold water from the building water supply to the fixtures, such as lavatories, bathtubs, water closets and kitchen sinks. 
 
1. Water main (street main) 
2. (Wa...
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Add to cartCold Water Supply of the plumbing system - ANSWER-Also known as Water Distribution System, consists of the piping and fittings which supply cold water from the building water supply to the fixtures, such as lavatories, bathtubs, water closets and kitchen sinks. 
 
1. Water main (street main) 
2. (Wa...
What is the maximum advisable rate of chlorine gas removal from a 150- pound cylinder? - ANSWER-40 pounds per day 
 
What is a type of positive displacement water meter? - ANSWER-Nutating- disk meter 
 
What is a power-operated mechanism for opening and closing a valve? - ANSWER-Actuator 
 
What is ...
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Add to cartWhat is the maximum advisable rate of chlorine gas removal from a 150- pound cylinder? - ANSWER-40 pounds per day 
 
What is a type of positive displacement water meter? - ANSWER-Nutating- disk meter 
 
What is a power-operated mechanism for opening and closing a valve? - ANSWER-Actuator 
 
What is ...
Who is ultimately responsible for being sure that your agency has a good record keeping system? - ANSWER-Supervisor 
 
Which type of pipe is most likely to be damaged by corrosion? - ANSWER-Steel 
 
What is the most important and all inclusive aspect of supervision? - ANSWER-proper utilization of al...
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Add to cartWho is ultimately responsible for being sure that your agency has a good record keeping system? - ANSWER-Supervisor 
 
Which type of pipe is most likely to be damaged by corrosion? - ANSWER-Steel 
 
What is the most important and all inclusive aspect of supervision? - ANSWER-proper utilization of al...
Polarity of water - ANSWER-water is a polar molecule meaning it has opposite charges on opposite ends. This causes hydrogen bonds to form causing water to stick together. 
 
Watershed - ANSWER-An ecosystem where all water runoff drains into a single body of water 
 
River Basin/Drainage Basin - ANSW...
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Add to cartPolarity of water - ANSWER-water is a polar molecule meaning it has opposite charges on opposite ends. This causes hydrogen bonds to form causing water to stick together. 
 
Watershed - ANSWER-An ecosystem where all water runoff drains into a single body of water 
 
River Basin/Drainage Basin - ANSW...
The bubbles formed in a positive multiple tube fermentation test are - ANSWER-Carbon Dioxide 
 
The maximum rate of withdrawal of gas from a 150lb chlorine cylinder in 24-hours is - ANSWER-40 lbs 
 
If you encounter a liquid chlorine leak in a one tone container, what action should you take first, t...
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Add to cartThe bubbles formed in a positive multiple tube fermentation test are - ANSWER-Carbon Dioxide 
 
The maximum rate of withdrawal of gas from a 150lb chlorine cylinder in 24-hours is - ANSWER-40 lbs 
 
If you encounter a liquid chlorine leak in a one tone container, what action should you take first, t...
What do water distribution system operators do with water distribution facilities? - ANSWER-Water distribution system operators make sure water facilities do their intended job. Operators operate, maintain, repair and manage these facilities. 
 
List the two major sources of water supplies? - ANSWER...
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Add to cartWhat do water distribution system operators do with water distribution facilities? - ANSWER-Water distribution system operators make sure water facilities do their intended job. Operators operate, maintain, repair and manage these facilities. 
 
List the two major sources of water supplies? - ANSWER...
All the water on Earth is part of a large system. - ANSWER-Hydrosphere 
 
1. All the water on Earth is part of a large system. 
2. On Earth, water occurs in all three phases. - ANSWER-Hydrosphere 
 
What percent of water covers Earth's surface. - ANSWER-71% 
 
What percent of water on Earth is salt...
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Add to cartAll the water on Earth is part of a large system. - ANSWER-Hydrosphere 
 
1. All the water on Earth is part of a large system. 
2. On Earth, water occurs in all three phases. - ANSWER-Hydrosphere 
 
What percent of water covers Earth's surface. - ANSWER-71% 
 
What percent of water on Earth is salt...
Chlorine gas - ANSWER-heavier than air, extremely toxic, very corrosive to damp atmospheres 
 
Centrifugal pump - ANSWER-Most common pump, used for high flow, and low pressure applications booster pumps 
 
Positive displacement pump - ANSWER-For low flow, high pressure applications. Chemical feed pu...
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Add to cartChlorine gas - ANSWER-heavier than air, extremely toxic, very corrosive to damp atmospheres 
 
Centrifugal pump - ANSWER-Most common pump, used for high flow, and low pressure applications booster pumps 
 
Positive displacement pump - ANSWER-For low flow, high pressure applications. Chemical feed pu...
To help prevent tooth decay, public water distribution systems add _____. - ANSWER-fluoride 
 
A homeowner is having a well installed in an area where the water table is 30 feet below the surface. The 
type of well installed will most likely be dug or _____. - ANSWER-driven 
 
More gallons per minut...
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Add to cartTo help prevent tooth decay, public water distribution systems add _____. - ANSWER-fluoride 
 
A homeowner is having a well installed in an area where the water table is 30 feet below the surface. The 
type of well installed will most likely be dug or _____. - ANSWER-driven 
 
More gallons per minut...
Cross connection - ANSWER-A connection between a safe and an unsafe water supply is called a 
 
Is available for use without causing shortages during dry periods - ANSWER-Safe yield of a water source is the quantity of water which: 
 
Rate of flow of water - ANSWER-A Venturi tube increases the veloc...
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Add to cartCross connection - ANSWER-A connection between a safe and an unsafe water supply is called a 
 
Is available for use without causing shortages during dry periods - ANSWER-Safe yield of a water source is the quantity of water which: 
 
Rate of flow of water - ANSWER-A Venturi tube increases the veloc...
compression repair clamps should never be used - ANSWER-underground 
 
a water and gas safety valve is designed to - ANSWER-shut off water and gas in the event of a leak 
 
a globe valve would best be described as a(n) - ANSWER-throttling valve 
 
A ____ valve should be used when water is run to a s...
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Add to cartcompression repair clamps should never be used - ANSWER-underground 
 
a water and gas safety valve is designed to - ANSWER-shut off water and gas in the event of a leak 
 
a globe valve would best be described as a(n) - ANSWER-throttling valve 
 
A ____ valve should be used when water is run to a s...
Water (Street) Main - ANSWER-A water supply pipe for public or community, use controlled by public authority. 
 
Water Service Pipe - ANSWER-The pipe from the water main, water meter, water supply system. 
 
Water Distribution Pipe - ANSWER-A pipe which conveys potable water from the building supply...
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Add to cartWater (Street) Main - ANSWER-A water supply pipe for public or community, use controlled by public authority. 
 
Water Service Pipe - ANSWER-The pipe from the water main, water meter, water supply system. 
 
Water Distribution Pipe - ANSWER-A pipe which conveys potable water from the building supply...
A customer complaint about the presence of brown floc in tap water can best be handled by...? - ANSWER-investigating the problem ASAP. 
 
The term "aquifer" refers to what type of water? - ANSWER-Groundwater 
 
One indication of corrosive water is a high concentration of...? - ANSWER-Carbon dioxid...
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Add to cartA customer complaint about the presence of brown floc in tap water can best be handled by...? - ANSWER-investigating the problem ASAP. 
 
The term "aquifer" refers to what type of water? - ANSWER-Groundwater 
 
One indication of corrosive water is a high concentration of...? - ANSWER-Carbon dioxid...
evaporation and transpiration - ANSWER-water rises to the atmosphere 
 
Transpiration - ANSWER-Evaporation of water from plants 
 
Infiltration/percolation - ANSWER-downward movement of water through the soil 
 
Aquifer - ANSWER-A body of rock or sediment that stores groundwater and allows the flow ...
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Add to cartevaporation and transpiration - ANSWER-water rises to the atmosphere 
 
Transpiration - ANSWER-Evaporation of water from plants 
 
Infiltration/percolation - ANSWER-downward movement of water through the soil 
 
Aquifer - ANSWER-A body of rock or sediment that stores groundwater and allows the flow ...
Who sets Maximum Contaminants Levels (MCLs)? - ANSWER-USEPA 
 
What are some of the duties of the EPA? - ANSWER-Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activities, provides continued research 
 
What is state primacy? - ANSWER-Giving the autho...
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Add to cartWho sets Maximum Contaminants Levels (MCLs)? - ANSWER-USEPA 
 
What are some of the duties of the EPA? - ANSWER-Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activities, provides continued research 
 
What is state primacy? - ANSWER-Giving the autho...
Which regulation specifies operator training and certification requirements - ANSWER-O.Reg. 128/04 - Certification of Drinking Water System Operators and Water Quality Analysts 
 
Which regulations addresses requirements for alarms - ANSWER-O. Reg. 170/03 - Drinking Water systems 
 
In case of adver...
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Add to cartWhich regulation specifies operator training and certification requirements - ANSWER-O.Reg. 128/04 - Certification of Drinking Water System Operators and Water Quality Analysts 
 
Which regulations addresses requirements for alarms - ANSWER-O. Reg. 170/03 - Drinking Water systems 
 
In case of adver...
rain water - ANSWER-is soft and pure and is suitable for the hot water supply system 
 
rain water - ANSWER-only a source during the wet season; storage becomes a breeding place for mosquitoes; 
 
rain water - ANSWER-roof may not be clean 
 
natural surface water - ANSWER-obtained from ponds, lakes ...
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Add to cartrain water - ANSWER-is soft and pure and is suitable for the hot water supply system 
 
rain water - ANSWER-only a source during the wet season; storage becomes a breeding place for mosquitoes; 
 
rain water - ANSWER-roof may not be clean 
 
natural surface water - ANSWER-obtained from ponds, lakes ...
What is stratification in lakes and reservoirs? - ANSWER-Formation of separate layers of temperature, plant life, or animal life 
 
What causes the elevation and slope of water tables and artesian pressure levels to change? - ANSWER-Seasonal variations in the supply of water 
 
How extensive should ...
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Add to cartWhat is stratification in lakes and reservoirs? - ANSWER-Formation of separate layers of temperature, plant life, or animal life 
 
What causes the elevation and slope of water tables and artesian pressure levels to change? - ANSWER-Seasonal variations in the supply of water 
 
How extensive should ...
The number of monthly distributions system bacteriologiacal samples required is - ANSWER-Based on the population served 
 
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - ANSWER-0.080 mg/L 
 
Under the Surface Water Treatment Rule, disinfection residual...
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Add to cartThe number of monthly distributions system bacteriologiacal samples required is - ANSWER-Based on the population served 
 
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - ANSWER-0.080 mg/L 
 
Under the Surface Water Treatment Rule, disinfection residual...
Bog - ANSWER-A wetland with moss and acidic water, typically found in cooler climates 
 
Divide - ANSWER-A ridge of land that separates two watersheds; there is a continental one in North America in the Rocky Mountains 
 
Estuary - ANSWER-A partially enclosed body of water along the coast where fres...
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Add to cartBog - ANSWER-A wetland with moss and acidic water, typically found in cooler climates 
 
Divide - ANSWER-A ridge of land that separates two watersheds; there is a continental one in North America in the Rocky Mountains 
 
Estuary - ANSWER-A partially enclosed body of water along the coast where fres...
Nitrate may not exceed what concentration when tested yearly for a groundwater treatment plant ? - ANSWER-10 mg/L 
 
The minimum number of total coliform samples that must be collected per month is based on Wich of the following ? - ANSWER-The population served by the system 
 
When a distribution b...
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Add to cartNitrate may not exceed what concentration when tested yearly for a groundwater treatment plant ? - ANSWER-10 mg/L 
 
The minimum number of total coliform samples that must be collected per month is based on Wich of the following ? - ANSWER-The population served by the system 
 
When a distribution b...
Estuary - ANSWER-the area where a freshwater stream or river merges with the ocean 
 
freshwater - ANSWER-water that has a low salinity. 
 
glacier - ANSWER-A large mass of moving ice and snow on land 
 
groundwater - ANSWER-water held underground in the soil or in pores and crevices in rock. 
 
hyd...
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Add to cartEstuary - ANSWER-the area where a freshwater stream or river merges with the ocean 
 
freshwater - ANSWER-water that has a low salinity. 
 
glacier - ANSWER-A large mass of moving ice and snow on land 
 
groundwater - ANSWER-water held underground in the soil or in pores and crevices in rock. 
 
hyd...
What term is used when a water utility divides its total operating expenses into the total revenue? 
 
a.) Debt ratio 
b.) Operating ratio 
c.) Credit ratio 
d.) Coverage ratio - ANSWER-b.) Operating ratio 
 
Under the requirements of the Safe Drinking Water Act, it is the duty of the water purveyor...
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Add to cartWhat term is used when a water utility divides its total operating expenses into the total revenue? 
 
a.) Debt ratio 
b.) Operating ratio 
c.) Credit ratio 
d.) Coverage ratio - ANSWER-b.) Operating ratio 
 
Under the requirements of the Safe Drinking Water Act, it is the duty of the water purveyor...
as the temperature of water increases the disinfection process - ANSWER-more effective 
 
water with a ph of 8.0 is considered - ANSWER-basic 
 
what is a low voltage electrical system that is used to prevent rust corrosion and pitting of metal surfaces in contact with water - ANSWER-cathodic protec...
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Add to cartas the temperature of water increases the disinfection process - ANSWER-more effective 
 
water with a ph of 8.0 is considered - ANSWER-basic 
 
what is a low voltage electrical system that is used to prevent rust corrosion and pitting of metal surfaces in contact with water - ANSWER-cathodic protec...
Impermeable - ANSWER-Does not allow water to flow through 
 
Permeable - ANSWER-Having pores or openings that allow water or other liquids to flow through them 
 
Aquifer - ANSWER-An underground layer of rock or soil that holds water 
 
Artesian Well - ANSWER-An underground water source in which wat...
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Add to cartImpermeable - ANSWER-Does not allow water to flow through 
 
Permeable - ANSWER-Having pores or openings that allow water or other liquids to flow through them 
 
Aquifer - ANSWER-An underground layer of rock or soil that holds water 
 
Artesian Well - ANSWER-An underground water source in which wat...
Water Cycle - ANSWER-The process of evaporation of water into the air and its return to earth by precipitation (rain or snow). This process also includes transpiration from plants, groundwater movement, and runoff in to rivers, streams, and the ocean. Also called the hydrologic cycle. 
 
Direct Runo...
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Add to cartWater Cycle - ANSWER-The process of evaporation of water into the air and its return to earth by precipitation (rain or snow). This process also includes transpiration from plants, groundwater movement, and runoff in to rivers, streams, and the ocean. Also called the hydrologic cycle. 
 
Direct Runo...
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