Texas Class C Surface Water Exam Review Ques ons and
answers new!! 2025/2026
A disease that cannot be contracted by drinking contaminated water is: - Correct Answers
Malaria
A non-permit confined space by OSHA standards means a confined space that: - Correct
Answers Does not contain or have the poten al to contain any hazard capable of causing death
When used in connec on with the Safe Drinking Water Act, the term "MCL" means: - Correct
Answers Maximum Contaminant Level
Examples of non-community water systems include: - Correct Answers Highway rest areas
The TCEQ requires that results be recorded and submi-ed daily for surface water supplies for: -
Correct Answers Disinfectant residuals, turbidity, total solids, pH, alkalinity
tracking and maintaining an operator's training records is ul mately the responsibility of the: -
Correct Answers Operator
An employee without a breathing apparatus is in a room where chlorine gas suddenly begins
leaking. What should the employee do first? - Correct Answers Keep mouth closed, keep head
as high as possible, and quickly walk out of the room, holding their breath if possible
Before changing a gas chlorine cylinder in a room, the first step should be: - Correct Answers
Start the exhaust vent fan
Waterworks operator's holding grade c cer ficates are required to renew their cer ficates
every three years and to: - Correct Answers Inform the TCEQ of any address changes
, In order to insure that the water produced meets TCEQ standards, each surface water
treatment plant must have a surface water operator on duty at all mes when the plant is in
opera on or the plant must be provided with: - Correct Answers Con nuous turbidity and
disinfectant residual monitors, automa c alarm systems, and an automa c shutdown system
The major responsibility of a cer fied waterworks operator is to: - Correct Answers Insure
that a safe and adequate supply of drinking water is delivered to the customer's tap
According to the TCEQ, a public water system is defined as any water system that provides
piped water for human consump on to at least _(a)_ service connec ons on a year-round basis
or regularly serves _(b)_ individuals daily at least_(c)_ days out of the year. - Correct Answers
(a) 15; (b) 25; (c) 60
Most of the surface water in Texas comes from: - Correct Answers Precipita on that falls
within the state
The most important factor in preven ng accidents is: - Correct Answers The a?tude of the
employee
Organics in surface water will combine with halogens to form: - Correct Answers
Trihalomethanes
According to the average annual water budget for Texas, the majority of surface water leaves
the state by: - Correct Answers Evapora on and transpira on
The term water stabiliza on refers to: - Correct Answers pH adjustment
Which pH measurements would indicate that water is basic: (6.0; 6.9; 7.0; 8.3) - Correct
Answers 8.3
, The Safe Water Drinking Act has set water quality standards for which category? - Correct
Answers Physical and chemical, radiological, and bacteriological
When a coagulant reacts with finely divided and suspended material in raw water, a: - Correct
Answers Floc is formed
The Rules and Regula ons for Public Water Systems require straight flow rectangular
sedimenta on basins to be designed to provide a deten on me of at least: - Correct Answers
6 hours
Which of the following statements regarding sedimenta on process is true: - Correct Answers
The 4 tradi onal zones of a rectangular sedimenta on basin are the inlet zone, se-ling zone,
outlet zone, and the sludge zone
Tastes and odors caused by decaying vegeta on can oHen be removed in the treatment process
by the use of: - Correct Answers Ac vated carbon
What chemical is used for soHening water? - Correct Answers Lime (Soda Ash)
The process of coagula on includes: - Correct Answers A chemical reac on, a physical
reac on, an agglomera on reac on, and neutraliza on of charged par cles
If sludge is allowed to remain too long on the bo-om of a sedimenta on basin, a problem
could develop with: - Correct Answers Taste and odor problems, reduc on of deten on me
in the basin, resuspension of solids, and crea on of sep c condi ons
Coagula on is affected by: - Correct Answers Turbidity, pH, and temperature
answers new!! 2025/2026
A disease that cannot be contracted by drinking contaminated water is: - Correct Answers
Malaria
A non-permit confined space by OSHA standards means a confined space that: - Correct
Answers Does not contain or have the poten al to contain any hazard capable of causing death
When used in connec on with the Safe Drinking Water Act, the term "MCL" means: - Correct
Answers Maximum Contaminant Level
Examples of non-community water systems include: - Correct Answers Highway rest areas
The TCEQ requires that results be recorded and submi-ed daily for surface water supplies for: -
Correct Answers Disinfectant residuals, turbidity, total solids, pH, alkalinity
tracking and maintaining an operator's training records is ul mately the responsibility of the: -
Correct Answers Operator
An employee without a breathing apparatus is in a room where chlorine gas suddenly begins
leaking. What should the employee do first? - Correct Answers Keep mouth closed, keep head
as high as possible, and quickly walk out of the room, holding their breath if possible
Before changing a gas chlorine cylinder in a room, the first step should be: - Correct Answers
Start the exhaust vent fan
Waterworks operator's holding grade c cer ficates are required to renew their cer ficates
every three years and to: - Correct Answers Inform the TCEQ of any address changes
, In order to insure that the water produced meets TCEQ standards, each surface water
treatment plant must have a surface water operator on duty at all mes when the plant is in
opera on or the plant must be provided with: - Correct Answers Con nuous turbidity and
disinfectant residual monitors, automa c alarm systems, and an automa c shutdown system
The major responsibility of a cer fied waterworks operator is to: - Correct Answers Insure
that a safe and adequate supply of drinking water is delivered to the customer's tap
According to the TCEQ, a public water system is defined as any water system that provides
piped water for human consump on to at least _(a)_ service connec ons on a year-round basis
or regularly serves _(b)_ individuals daily at least_(c)_ days out of the year. - Correct Answers
(a) 15; (b) 25; (c) 60
Most of the surface water in Texas comes from: - Correct Answers Precipita on that falls
within the state
The most important factor in preven ng accidents is: - Correct Answers The a?tude of the
employee
Organics in surface water will combine with halogens to form: - Correct Answers
Trihalomethanes
According to the average annual water budget for Texas, the majority of surface water leaves
the state by: - Correct Answers Evapora on and transpira on
The term water stabiliza on refers to: - Correct Answers pH adjustment
Which pH measurements would indicate that water is basic: (6.0; 6.9; 7.0; 8.3) - Correct
Answers 8.3
, The Safe Water Drinking Act has set water quality standards for which category? - Correct
Answers Physical and chemical, radiological, and bacteriological
When a coagulant reacts with finely divided and suspended material in raw water, a: - Correct
Answers Floc is formed
The Rules and Regula ons for Public Water Systems require straight flow rectangular
sedimenta on basins to be designed to provide a deten on me of at least: - Correct Answers
6 hours
Which of the following statements regarding sedimenta on process is true: - Correct Answers
The 4 tradi onal zones of a rectangular sedimenta on basin are the inlet zone, se-ling zone,
outlet zone, and the sludge zone
Tastes and odors caused by decaying vegeta on can oHen be removed in the treatment process
by the use of: - Correct Answers Ac vated carbon
What chemical is used for soHening water? - Correct Answers Lime (Soda Ash)
The process of coagula on includes: - Correct Answers A chemical reac on, a physical
reac on, an agglomera on reac on, and neutraliza on of charged par cles
If sludge is allowed to remain too long on the bo-om of a sedimenta on basin, a problem
could develop with: - Correct Answers Taste and odor problems, reduc on of deten on me
in the basin, resuspension of solids, and crea on of sep c condi ons
Coagula on is affected by: - Correct Answers Turbidity, pH, and temperature
