Unlocking Class D Water Operator Knowledge: A
Study Guide.
A Comprehensive exam study Guide with 100%
Certified by Expert.
Latest Updated 2025/2026
The primary purpose of the Water Utility Industry -ans The production and delivery of safe
drinking water to consumers
Those who work in the public water industry have a responsibility to meet standards created
by these types of government entities. -ans Federal and State
basic federal and state standards state that Water must be: -ans disinfected, delivered at
adequate pressure, and be ample in quantity.
Employees should guard what -ans the water supply and facilities
Employees should guard the water supply and facilities from these three things. -ans
contamination, vandalism and terrorism
Bacteriological analysis records are kept for -ans 5 years
Chemical analysis records are kept for -ans 10 years
Records about action taken to correct violations of primary drinking water regulations are
kept for -ans 3 years after last action taken
Written documentation relating to sanitary surveys conducted are kept for -ans 10 years after
the survey is completed
Documentation of a variance or exemption granted is kept for -ans 5 years after its expiration
Results of required tests, measurements or analysis must be reported -ans within 10 days
following its completion
A copy of Consumer Confidence reports (EPA Required)must be kept for -ans 5 years
Administers water operator licensing -ans TCEQ
TCEQ -ans Texas Commission on Environmental Quality
Description of a public water system -ans Regularly serves at least 25 individuals daily at
least 60 days out of the year.Services at least 15 service connections.
MUDs -ans Municipal Utility Districts
Water is essential to -ans Life and health
Customers are entitled to -ans courteous treatment & answers to questions about water
This type of public system is not required to compile monthly reports -ans systems that serve
less than 100 connections OR purchase treated water
Job training for water utility operators is available through these 3 organizations -ans
American Water Works Association, Texas Engineering Extension Service, Texas Water
Utilities Association
All public water systems are required to employ certified operators even if the system only -
ans redistributes treated water bought from another source
cities, municipal utility districts,rural water supply corporations mobile home parks,
campgrounds are examples of: -ans Public Water Systems
Examples of community water systems -ans cities, municipal utility districts,rural water
supply corporations, mobile home parks, campgrounds
Non-community water system -ans Any public water system that is not a community system
travel trailer spaces, Hotel and motel rooms, service stations are examples of this type of
water systems -ans non-community water systems
The federal agency that impacts the water industry -ans EPA
EPA -ans Environmental Protection Agency
The most important federal law impacting the water utility industry is the -ans Safe Drinking
Water Act
,Unlocking Class D Water Operator Knowledge: A
Study Guide.
A Comprehensive exam study Guide with 100%
Certified by Expert.
Latest Updated 2025/2026
The Safe Drinking Water Act establishes these 4 national safety and quality standards -ans
Physical, Chemical, Bacteriological, Radiological
The state agency that regulated drinking water in Texas and administers the Federal Safe
Drinking Water Act -ans TCEQ
The water system must notify the TCEQ when (5 items) -ans there is a change or alteration of
the system; a new facility to be build; water supply health hazards; change in water quality;
change in water source
MUDs; Rural Water Supply Corporations; Drainage Districts; Ground Water Conservation
Districts; Subsidence Districts and River Authorities -- These are what type of agencies and
what do they impact? -ans Regional and local agencies that impact the water utility industry
The relationship between you and the customer -ans Public Relations
PR -ans Public Relations
Wat are the three keys to good customer relations -ans Everything the utility does is PR;
Customers are entitles to courteous treatment; Every employee is a PR person
Customers have the most contact with -ans Meter Readers
Meter readers can be ambassadors of goodwill by doing these 5 things -ans wearing
identifying clothing; being neat and courteous; Teaching customers how to read their meter;
Explaining utility policies such as delinquent notices or disputed readings; Taking care or
property
Maintenance crews can warn customers of -ans service interruptions
Maintenance crews can provide this to protect the public -ans signs and barriers
The plant operator is responsible for making the water -ans safe to drink and use
Water bills should be 4 things -ans accurate; itemized; neat; legible
It is important that the utility have a sense of this (attitude) -ans pride and professionalism
Employees should be kept informed of utility... -ans plans and policies
How should customer complaints be treated? -ans as legitimate and investigated as soon as
possible
In small water systems the operator is often -ans a meter reader, repair crew and pump
operator; the highest paid employee; a college graduate
Stuffers are -ans sent to customers in billing statements
Suffers can be many things. Name 4. -ans departments to call for service; explanations of
utility policy; a history of the utility; tips on water conservation
Delinquent payment notices should be (4 things) -ans tactful and tasteful; mailed in an
envelope; businesslike
The EPA requires community water systems to The water system must provide customers
with a report on the system's water quality how often? -ans yearly
The annual system water quality report should be -ans attractive; easy to understand
The annual system water quality report can build what -ans goodwill and trust with the
customer
Good treatment of employees includes 3 primary things -ans fair wages; benefits; safe
working conditions
After action is taken on a complaint the employee should do this to to make sure everything
is satisfactory(OK). -ans follow up with a phone call, post card or e-mail
, Unlocking Class D Water Operator Knowledge: A
Study Guide.
A Comprehensive exam study Guide with 100%
Certified by Expert.
Latest Updated 2025/2026
Give 3 reasons that water plant facilities should be kept neat and clean -ans to indicate a
professional attitude; to keep public support; to keep confidence in the water quality
The employee should listen to special requests and look for ways to oblige the customer
within -ans utility policy
The chemical symbol for water -ans H2O
Three forms of water -ans solid(ice); liquid(water); water(vapor/gas)
Hydrological cycle -ans the natural exchange of water between the earth and atmosphere
Average water use depends on these 5 things -ans temperature; rainfall; cost; supply;
economic level
Ground Water is located -ans located below the earth's surface (underground)
Name the three places that surface water comes from. -ans rivers; lakes; reservoirs
According to the TCEQ, future water supplies will be -ans more scarce
Raw Water -ans Surface water or ground water prior to treatment
Ground water is tapped by -ans wells
Potable water -ans water that is free of disease-causing organisms, has a chlorine residual and
is safe for human consumption
Before construction, the utility must submit engineering plans to -ans the AWWA
Operators should keep records of 5 types of things -ans water usage; system pressure; sample
results; repairs; amount of chlorine used
Reports by Surface water systems must be received by the TCEQ at this location -ans Austin
Reports for Surface water systems must be received by the TCEQ by -ans the 15th of the
following month
How often are ground water systems are required to compile reports? -ans monthly
Reports for Ground Water Systems must be kept for... -ans inspection or review but are not
required to mail them in
Types of systems that are not required to compile monthly reports -ans Ground Water &
Surface Water that serve less than 100 connections
Water is never found in nature with this characteristic -ans pure
Name the 5 physical characteristics of water -ans Temperature; Turbidity; Color; Taste and
Odor
Chemical Characteristics of water -ans Hardness; pH; Solids; Gases
Turbidity -ans the amount of suspended matter such as clay, silt, organic matter and
microorganisms in water
Color in water can result from -ans mineral or organic matter
True color -ans dissolved in water; cannot be removed by filtering
Apparent Color -ans suspended in water; can be filtered out
an example of true color -ans tea
an example of apparent color -ans red water caused by oxidized iron
algae; bacteria; organic matter; gases; and chemicals give what to water -ans taste and color
chemicals in water are measured in -ans mg/L
mg/L -ans milligrams per liter
How often should surface water be sampled for chemical analysis? -ans once a year
How often should ground water be sampled for chemical analysis? -ans every 3 years
Hardness is caused by -ans calcium and magnesium and other minerals
Study Guide.
A Comprehensive exam study Guide with 100%
Certified by Expert.
Latest Updated 2025/2026
The primary purpose of the Water Utility Industry -ans The production and delivery of safe
drinking water to consumers
Those who work in the public water industry have a responsibility to meet standards created
by these types of government entities. -ans Federal and State
basic federal and state standards state that Water must be: -ans disinfected, delivered at
adequate pressure, and be ample in quantity.
Employees should guard what -ans the water supply and facilities
Employees should guard the water supply and facilities from these three things. -ans
contamination, vandalism and terrorism
Bacteriological analysis records are kept for -ans 5 years
Chemical analysis records are kept for -ans 10 years
Records about action taken to correct violations of primary drinking water regulations are
kept for -ans 3 years after last action taken
Written documentation relating to sanitary surveys conducted are kept for -ans 10 years after
the survey is completed
Documentation of a variance or exemption granted is kept for -ans 5 years after its expiration
Results of required tests, measurements or analysis must be reported -ans within 10 days
following its completion
A copy of Consumer Confidence reports (EPA Required)must be kept for -ans 5 years
Administers water operator licensing -ans TCEQ
TCEQ -ans Texas Commission on Environmental Quality
Description of a public water system -ans Regularly serves at least 25 individuals daily at
least 60 days out of the year.Services at least 15 service connections.
MUDs -ans Municipal Utility Districts
Water is essential to -ans Life and health
Customers are entitled to -ans courteous treatment & answers to questions about water
This type of public system is not required to compile monthly reports -ans systems that serve
less than 100 connections OR purchase treated water
Job training for water utility operators is available through these 3 organizations -ans
American Water Works Association, Texas Engineering Extension Service, Texas Water
Utilities Association
All public water systems are required to employ certified operators even if the system only -
ans redistributes treated water bought from another source
cities, municipal utility districts,rural water supply corporations mobile home parks,
campgrounds are examples of: -ans Public Water Systems
Examples of community water systems -ans cities, municipal utility districts,rural water
supply corporations, mobile home parks, campgrounds
Non-community water system -ans Any public water system that is not a community system
travel trailer spaces, Hotel and motel rooms, service stations are examples of this type of
water systems -ans non-community water systems
The federal agency that impacts the water industry -ans EPA
EPA -ans Environmental Protection Agency
The most important federal law impacting the water utility industry is the -ans Safe Drinking
Water Act
,Unlocking Class D Water Operator Knowledge: A
Study Guide.
A Comprehensive exam study Guide with 100%
Certified by Expert.
Latest Updated 2025/2026
The Safe Drinking Water Act establishes these 4 national safety and quality standards -ans
Physical, Chemical, Bacteriological, Radiological
The state agency that regulated drinking water in Texas and administers the Federal Safe
Drinking Water Act -ans TCEQ
The water system must notify the TCEQ when (5 items) -ans there is a change or alteration of
the system; a new facility to be build; water supply health hazards; change in water quality;
change in water source
MUDs; Rural Water Supply Corporations; Drainage Districts; Ground Water Conservation
Districts; Subsidence Districts and River Authorities -- These are what type of agencies and
what do they impact? -ans Regional and local agencies that impact the water utility industry
The relationship between you and the customer -ans Public Relations
PR -ans Public Relations
Wat are the three keys to good customer relations -ans Everything the utility does is PR;
Customers are entitles to courteous treatment; Every employee is a PR person
Customers have the most contact with -ans Meter Readers
Meter readers can be ambassadors of goodwill by doing these 5 things -ans wearing
identifying clothing; being neat and courteous; Teaching customers how to read their meter;
Explaining utility policies such as delinquent notices or disputed readings; Taking care or
property
Maintenance crews can warn customers of -ans service interruptions
Maintenance crews can provide this to protect the public -ans signs and barriers
The plant operator is responsible for making the water -ans safe to drink and use
Water bills should be 4 things -ans accurate; itemized; neat; legible
It is important that the utility have a sense of this (attitude) -ans pride and professionalism
Employees should be kept informed of utility... -ans plans and policies
How should customer complaints be treated? -ans as legitimate and investigated as soon as
possible
In small water systems the operator is often -ans a meter reader, repair crew and pump
operator; the highest paid employee; a college graduate
Stuffers are -ans sent to customers in billing statements
Suffers can be many things. Name 4. -ans departments to call for service; explanations of
utility policy; a history of the utility; tips on water conservation
Delinquent payment notices should be (4 things) -ans tactful and tasteful; mailed in an
envelope; businesslike
The EPA requires community water systems to The water system must provide customers
with a report on the system's water quality how often? -ans yearly
The annual system water quality report should be -ans attractive; easy to understand
The annual system water quality report can build what -ans goodwill and trust with the
customer
Good treatment of employees includes 3 primary things -ans fair wages; benefits; safe
working conditions
After action is taken on a complaint the employee should do this to to make sure everything
is satisfactory(OK). -ans follow up with a phone call, post card or e-mail
, Unlocking Class D Water Operator Knowledge: A
Study Guide.
A Comprehensive exam study Guide with 100%
Certified by Expert.
Latest Updated 2025/2026
Give 3 reasons that water plant facilities should be kept neat and clean -ans to indicate a
professional attitude; to keep public support; to keep confidence in the water quality
The employee should listen to special requests and look for ways to oblige the customer
within -ans utility policy
The chemical symbol for water -ans H2O
Three forms of water -ans solid(ice); liquid(water); water(vapor/gas)
Hydrological cycle -ans the natural exchange of water between the earth and atmosphere
Average water use depends on these 5 things -ans temperature; rainfall; cost; supply;
economic level
Ground Water is located -ans located below the earth's surface (underground)
Name the three places that surface water comes from. -ans rivers; lakes; reservoirs
According to the TCEQ, future water supplies will be -ans more scarce
Raw Water -ans Surface water or ground water prior to treatment
Ground water is tapped by -ans wells
Potable water -ans water that is free of disease-causing organisms, has a chlorine residual and
is safe for human consumption
Before construction, the utility must submit engineering plans to -ans the AWWA
Operators should keep records of 5 types of things -ans water usage; system pressure; sample
results; repairs; amount of chlorine used
Reports by Surface water systems must be received by the TCEQ at this location -ans Austin
Reports for Surface water systems must be received by the TCEQ by -ans the 15th of the
following month
How often are ground water systems are required to compile reports? -ans monthly
Reports for Ground Water Systems must be kept for... -ans inspection or review but are not
required to mail them in
Types of systems that are not required to compile monthly reports -ans Ground Water &
Surface Water that serve less than 100 connections
Water is never found in nature with this characteristic -ans pure
Name the 5 physical characteristics of water -ans Temperature; Turbidity; Color; Taste and
Odor
Chemical Characteristics of water -ans Hardness; pH; Solids; Gases
Turbidity -ans the amount of suspended matter such as clay, silt, organic matter and
microorganisms in water
Color in water can result from -ans mineral or organic matter
True color -ans dissolved in water; cannot be removed by filtering
Apparent Color -ans suspended in water; can be filtered out
an example of true color -ans tea
an example of apparent color -ans red water caused by oxidized iron
algae; bacteria; organic matter; gases; and chemicals give what to water -ans taste and color
chemicals in water are measured in -ans mg/L
mg/L -ans milligrams per liter
How often should surface water be sampled for chemical analysis? -ans once a year
How often should ground water be sampled for chemical analysis? -ans every 3 years
Hardness is caused by -ans calcium and magnesium and other minerals
