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Questions and Answers
What state agency is responsible for enforcing the Safe Drinking Water Act in Texas?
What state agency is responsible for enforcing the Safe Drinking Water Act in Texas?
Texas Commission on Environmental Quality
What minerals can cause water hardness?
What minerals can cause water hardness?
Calcium and magnesium
A public water system must at all times provide what?
A public water system must at all times provide what?
Adequate quantity of water, pressure, and disinfection
What is a source of groundwater?
What is a source of groundwater?
Fecal coliform organisms sometimes found in water supplies indicate what?
Fecal coliform organisms sometimes found in water supplies indicate what?
What is a disease that may be spread by inadequately disinfected water?
What is a disease that may be spread by inadequately disinfected water?
What is a common chemical used in the disinfection of a small water supply?
What is a common chemical used in the disinfection of a small water supply?
What is a physical connection between a potable water supply and a house well called?
What is a physical connection between a potable water supply and a house well called?
What is the amount of chlorine in mg/L that reacts with iron, organics, or bacteria called?
What is the amount of chlorine in mg/L that reacts with iron, organics, or bacteria called?
Which of the following is a physical characteristic of chlorine gas?
Which of the following is a physical characteristic of chlorine gas?
What would be considered a part of a hypochlorinator system?
What would be considered a part of a hypochlorinator system?
What is required according to state requirements for all public water supply wells?
What is required according to state requirements for all public water supply wells?
How is the drawdown of a water well determined?
How is the drawdown of a water well determined?
What does the pH of water indicate?
What does the pH of water indicate?
On what scale is the pH of water expressed?
On what scale is the pH of water expressed?
What pH level is considered neutral?
What pH level is considered neutral?
What is a required step in collecting a routine distribution sample for bacteriological testing?
What is a required step in collecting a routine distribution sample for bacteriological testing?
What can sand filtration remove from surface water?
What can sand filtration remove from surface water?
What is activated carbon primarily used for in a surface water plant?
What is activated carbon primarily used for in a surface water plant?
Which chemicals are commonly used as coagulants in surface water treatment?
Which chemicals are commonly used as coagulants in surface water treatment?
What are ground storage tanks required to provide?
What are ground storage tanks required to provide?
How should an elevated storage tank be protected against corrosion?
How should an elevated storage tank be protected against corrosion?
What residual pressure should a public water supply system maintain?
What residual pressure should a public water supply system maintain?
Before a new or repaired water line is placed into service, it must be properly disinfected by providing a chlorine dosage of _________ mg/L and proper detention time.
Before a new or repaired water line is placed into service, it must be properly disinfected by providing a chlorine dosage of _________ mg/L and proper detention time.
What are water-bearing formations beneath the earth's surface used for public water supplies called?
What are water-bearing formations beneath the earth's surface used for public water supplies called?
What is the purpose of an air line on a well?
What is the purpose of an air line on a well?
What is the importance of the mesh size in a well screen?
What is the importance of the mesh size in a well screen?
What factors most affect the process of coagulation when treating surface water?
What factors most affect the process of coagulation when treating surface water?
When should a rapid sand filter be backwashed?
When should a rapid sand filter be backwashed?
What is an acceptable disinfection residual at the far reaches of the distribution system?
What is an acceptable disinfection residual at the far reaches of the distribution system?
What is the approximate total volume in gallons of a circular tank that is 30 feet in diameter and 15 feet deep?
What is the approximate total volume in gallons of a circular tank that is 30 feet in diameter and 15 feet deep?
If you are using a chlorinator to provide a dosage of 4.0 mg/L and the daily water usage is 750,000 gallons, what should the gas chlorinator feed rate be set at in pounds per day?
If you are using a chlorinator to provide a dosage of 4.0 mg/L and the daily water usage is 750,000 gallons, what should the gas chlorinator feed rate be set at in pounds per day?
How much does one gallon of water weigh?
How much does one gallon of water weigh?
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the vessel by how much?
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the vessel by how much?
A raw water intake structure may not be constructed within how many feet of a boat ramp, dock, or marina?
A raw water intake structure may not be constructed within how many feet of a boat ramp, dock, or marina?
What are the common types of pumps for use in water wells?
What are the common types of pumps for use in water wells?
What is the natural exchange of water between the earth and air called?
What is the natural exchange of water between the earth and air called?
If a health hazard contamination event occurs in a public water system, how quickly must the operator contact the state regulatory authority?
If a health hazard contamination event occurs in a public water system, how quickly must the operator contact the state regulatory authority?
What does potable water mean?
What does potable water mean?
Excessive nitrates in drinking water can cause a condition in infants under the age of 6 months known as what?
Excessive nitrates in drinking water can cause a condition in infants under the age of 6 months known as what?
What is the process in surface water treatment that causes fine particles to join together?
What is the process in surface water treatment that causes fine particles to join together?
The test commonly used to determine the chemical dosage for surface water plants is the _______ test.
The test commonly used to determine the chemical dosage for surface water plants is the _______ test.
Suspended solids are the solids portion that can cause what?
Suspended solids are the solids portion that can cause what?
What organism is used as an indicator in bacteriological analysis?
What organism is used as an indicator in bacteriological analysis?
Chlorine dosage is what plus desired residual?
Chlorine dosage is what plus desired residual?
What is a storage vessel that is uniform in diameter and more than 20 feet but less than 80 feet tall called?
What is a storage vessel that is uniform in diameter and more than 20 feet but less than 80 feet tall called?
Potable water must be stored at an elevation at least 80.85 feet above the highest known connection to provide the minimum operating pressure of _____ psi.
Potable water must be stored at an elevation at least 80.85 feet above the highest known connection to provide the minimum operating pressure of _____ psi.
What do we call a water tank that uses compressed air over water to provide pressure?
What do we call a water tank that uses compressed air over water to provide pressure?
According to the lead and copper rule, pipes and fittings may not contain more than __________ lead.
According to the lead and copper rule, pipes and fittings may not contain more than __________ lead.
What color does the sample turn when DPD is added to water containing chlorine?
What color does the sample turn when DPD is added to water containing chlorine?
What is the most commonly used valve for isolating a water leak?
What is the most commonly used valve for isolating a water leak?
What can happen in the distribution system if a valve or hydrant is opened or closed too fast?
What can happen in the distribution system if a valve or hydrant is opened or closed too fast?
What is the most commonly used pump in the distribution system?
What is the most commonly used pump in the distribution system?
How many gallons per minute is 21 MGD water when treating in a surface water plant?
How many gallons per minute is 21 MGD water when treating in a surface water plant?
A class D certified operator can operate a public water system with up to _________ connections.
A class D certified operator can operate a public water system with up to _________ connections.
All state of Texas operator licenses after issue are valid for _________ years.
All state of Texas operator licenses after issue are valid for _________ years.
If a testing point for bacteriological samples tests positive, what should the operator do?
If a testing point for bacteriological samples tests positive, what should the operator do?
Any excavation greater than _________ feet in depth requires the use of OSHA approved shoring equipment.
Any excavation greater than _________ feet in depth requires the use of OSHA approved shoring equipment.
What should an operator do if they discover chlorine on a 150 lb cylinder inside a room?
What should an operator do if they discover chlorine on a 150 lb cylinder inside a room?
Waterlines should be installed no closer than ___________ feet to any sewer lines or other possible contaminant lines.
Waterlines should be installed no closer than ___________ feet to any sewer lines or other possible contaminant lines.
If a pressure gauge at the base of an elevated storage tank reads 72 psi, how far above is the gauge relative to the water surface?
If a pressure gauge at the base of an elevated storage tank reads 72 psi, how far above is the gauge relative to the water surface?
The total volume in gallons of a storage tank that is 978 cubic feet is how many gallons?
The total volume in gallons of a storage tank that is 978 cubic feet is how many gallons?
What percentage of chlorine is typically found in calcium hypochlorite (HTH)?
What percentage of chlorine is typically found in calcium hypochlorite (HTH)?
What should a certified operator do if they find signs of tampering at a water facility?
What should a certified operator do if they find signs of tampering at a water facility?
When calculating area, the standard numerical value for pi is _______.
When calculating area, the standard numerical value for pi is _______.
What is the minimum flushing requirement for public water systems to ensure chlorine residual and water quality?
What is the minimum flushing requirement for public water systems to ensure chlorine residual and water quality?
In small systems, what must liquid bleach conform to in order to be approved for disinfection?
In small systems, what must liquid bleach conform to in order to be approved for disinfection?
What is the process of adding enough chlorine to a water supply to react with reducing compounds and leave some free chlorine called?
What is the process of adding enough chlorine to a water supply to react with reducing compounds and leave some free chlorine called?
What are the primary reasons for mainline failures in the distribution system?
What are the primary reasons for mainline failures in the distribution system?
What are check values on the discharge side of a pump used for?
What are check values on the discharge side of a pump used for?
__________ and __________ acids are by-products of drinking water.
__________ and __________ acids are by-products of drinking water.
There are ______ major underground water aquifers in Texas.
There are ______ major underground water aquifers in Texas.
Most common type of filter in a surface plant is _________ and is designed to flow at ________.
Most common type of filter in a surface plant is _________ and is designed to flow at ________.
Proper backwashing of a sand filter is accomplished when the filter media expands by _________ %.
Proper backwashing of a sand filter is accomplished when the filter media expands by _________ %.
After disinfection and flushing of super chlorinated new lines, how many bacteriological samples are required for every __________ feet of line?
After disinfection and flushing of super chlorinated new lines, how many bacteriological samples are required for every __________ feet of line?
What is the TCEQ preferred method for cross-connection control?
What is the TCEQ preferred method for cross-connection control?
What microorganism in water is resistant to chlorine?
What microorganism in water is resistant to chlorine?
Which of the following are common types of water meters?
Which of the following are common types of water meters?
What can trigger a boil-water notice?
What can trigger a boil-water notice?
What is the maximum safe withdrawal rate of chlorine for a 150-pound cylinder?
What is the maximum safe withdrawal rate of chlorine for a 150-pound cylinder?
When diluting a strong acid, always add _______ to ________ rather than the reverse.
When diluting a strong acid, always add _______ to ________ rather than the reverse.
Normal oxygen content in the atmosphere is _______%.
Normal oxygen content in the atmosphere is _______%.
Any atmosphere that is less than ________% oxygen should not be entered without an approved self-contained breathing apparatus.
Any atmosphere that is less than ________% oxygen should not be entered without an approved self-contained breathing apparatus.
What compounds are formed when chlorine gas is added to water?
What compounds are formed when chlorine gas is added to water?
What is the most important federal law that impacts the water utility industry?
What is the most important federal law that impacts the water utility industry?
Can you give an example of a non-community water system?
Can you give an example of a non-community water system?
What must community water systems provide customers with annually?
What must community water systems provide customers with annually?
When designing systems, engineers use a rule of thumb of _______ gallons per person per day when accurate data isn't available.
When designing systems, engineers use a rule of thumb of _______ gallons per person per day when accurate data isn't available.
TCEQ requires community water systems to have a minimum production capacity of _______ per connection at peak demand.
TCEQ requires community water systems to have a minimum production capacity of _______ per connection at peak demand.
What is the most important treatment in water management?
What is the most important treatment in water management?
What does potable water mean?
What does potable water mean?
What does TCEQ require notification from the operator for?
What does TCEQ require notification from the operator for?
What reports are public water systems in Texas required to compile and maintain?
What reports are public water systems in Texas required to compile and maintain?
What are the physical characteristics of water?
What are the physical characteristics of water?
What are common gases found in water that can sometimes be detected by their distinct smells?
What are common gases found in water that can sometimes be detected by their distinct smells?
Groundwater is generally well filtered and free of turbidity, color, and organic materials. However, it may be high in what?
Groundwater is generally well filtered and free of turbidity, color, and organic materials. However, it may be high in what?
Livestock and septic tanks must be no closer than ________ to a public well.
Livestock and septic tanks must be no closer than ________ to a public well.
Underground fuel tanks and septic drainage fields must be at least _______ feet from a public well.
Underground fuel tanks and septic drainage fields must be at least _______ feet from a public well.
Feedlots, sewage treatment plants, and landfills must be at least ______ feet from a public well.
Feedlots, sewage treatment plants, and landfills must be at least ______ feet from a public well.
Trenches for laying 6 inch and larger pipe must be at least 18 inches or ______ inches wider than the pipe diameter.
Trenches for laying 6 inch and larger pipe must be at least 18 inches or ______ inches wider than the pipe diameter.
Flashcards
TCEQ
TCEQ
The Texas Commission on Environmental Quality, responsible for enforcing the Safe Drinking Water Act in Texas.
Water Hardness
Water Hardness
The presence of calcium and magnesium minerals in water, causing scaling and soap scum.
Public Water System
Public Water System
A system that provides water to 15 or more service connections or 25 or more people for at least 60 days per year.
Groundwater Source
Groundwater Source
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Fecal Coliform
Fecal Coliform
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Dysentery
Dysentery
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Calcium Hypochlorite
Calcium Hypochlorite
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Cross Connection
Cross Connection
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Chlorine Demand
Chlorine Demand
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Chlorine Gas
Chlorine Gas
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Solution Feed Pump
Solution Feed Pump
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Public Supply Well
Public Supply Well
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Well Drawdown
Well Drawdown
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pH
pH
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Sand Filtration
Sand Filtration
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Activated Carbon
Activated Carbon
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Coagulants
Coagulants
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Ground Storage Tank
Ground Storage Tank
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Elevated Tank
Elevated Tank
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Minimum Residual Pressure
Minimum Residual Pressure
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Aquifer
Aquifer
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Air Line (Well)
Air Line (Well)
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Well Screen Mesh
Well Screen Mesh
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Coagulation Efficiency
Coagulation Efficiency
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Rapid Sand Filter
Rapid Sand Filter
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Chlorine Residual
Chlorine Residual
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Circular Tank Volume
Circular Tank Volume
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Gas Chlorinator Output
Gas Chlorinator Output
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Water Weight and Pressure
Water Weight and Pressure
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Raw Water Intake
Raw Water Intake
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Water Well Pumps
Water Well Pumps
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Hydraulic Cycle
Hydraulic Cycle
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Health Hazard Event
Health Hazard Event
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Potable Water
Potable Water
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Study Notes
TCEQ Class C Water License Exam Study Notes
- Texas Commission on Environmental Quality (TCEQ) enforces the Safe Drinking Water Act in Texas.
- Water hardness is primarily caused by calcium and magnesium minerals.
- Public water systems must ensure adequate water quantity, pressure, and disinfection at all times.
- Groundwater sources include aquifers.
- Fecal coliform presence in water indicates possible contamination and harmful bacteria.
- Dysentery can spread due to inadequately disinfected water.
- Calcium hypochlorite is a common disinfectant used for small water supplies.
- A cross connection is a physical link between potable water and a well.
- Chlorine demand is the amount of chlorine consumed by reactions in water.
- Chlorine gas is characterized by a greenish-yellow color, pungent odor, and is corrosive.
- A solution feed pump is a component of a hypochlorinator system.
- Public supply wells must have features such as a raised concrete seal, screened vents, and a flow measuring device.
- Water well drawdown is calculated by the difference between static and pumping water levels.
- pH indicates the acidity or basicity of water, on a scale of 0 to 14, with 7.0 being neutral.
- Routine distribution bacteriological sampling requires the use of sterile sample containers.
- Sand filtration effectively removes turbidity from surface water.
- Activated carbon purification in surface water treatment focuses on controlling taste and odor.
- Common coagulants in surface water treatment include alum and ferric chloride.
- Ground storage tanks need specific features like screened vents and proper maintenance protocols.
- Elevated tanks require corrosion protection measures such as painting and cathodic protection.
- Public water systems should maintain a minimum residual pressure of 20 psi, with normal operating pressure at 35 psi.
- New or repaired water lines must receive a chlorine dosage of 50 mg/L for disinfection before service.
- Aquifers are underground water-bearing formations for public water supplies.
- The purpose of an air line on a well is to measure water levels.
- Properly sized well screen mesh reduces the amount of sand pumped.
- Coagulation efficiency is influenced by pH, alkalinity, temperature, and chemical dosage during surface water treatment.
- Rapid sand filters need backwashing when the loss of head gauge reading is between 6 and 10 feet.
- Acceptable chlorine residuals at distribution system extremes include 0.2 mg/L free chlorine and specific residuals for chloramines.
- A circular tank with a diameter of 30 feet and depth of 15 feet holds approximately 79,300 gallons.
- A gas chlorinator output for 750,000 gallons at 4.0 mg/L should be set at 25 pounds per day.
- One gallon of water weighs 8.34 pounds, and 1 foot of water adds 0.433 psi of pressure in a vessel.
- Raw water intakes must be 1,000 feet from boat ramps or docks.
- Common pumps for water wells include vertical turbine and submersible types.
- The hydraulic cycle describes the natural flow of water exchange between the Earth and atmosphere.
- Operators must report health hazard events in a public water system to state authorities within 24 hours.
- Potable water is defined as safe for human consumption, free from pathogens, and with chlorine residual.
- Excessive nitrates in drinking water can lead to "blue baby" syndrome in infants under 6 months.
- Coagulation in surface water treatment forms larger particles from fine solids for removal in clarifiers.
- Jar tests help determine the correct chemical dosage for surface water treatment.
- Suspended solids in water can lead to mudballs and filter clogs.
- Coliform bacteria serve as an indicator organism for bacteriological analysis in water systems.
- Chlorine dosage consists of demand plus the desired residual.
- Stand pipes are storage vessels over 20 feet but less than 80 feet tall, with constant diameter.
- Elevated storage tanks require a minimum elevation of 80.85 feet to provide a 35 psi pressure.
- Hydro pneumatic tanks use compressed air to exert pressure on water.
- Under the lead and copper rule, piping and fittings must not exceed 8.0% lead.
- DPD test utilizes an indicator that turns red in the presence of chlorine.
- The gate valve is the most common valve used to isolate water leaks.
- Water hammer can occur from rapid valve or hydrant operation in distribution systems.
- Centrifugal pumps are typically employed in distribution systems.
- 21 million gallons per day (MGD) corresponds to approximately 14,583 gallons per minute (GPM).
- A Class D certified operator can manage a public water system serving up to 250 connections.
- Texas operator licenses are valid for three years after issuance.
- Operators must retest positive results for bacteriological samples by collecting additional samples.
- Any excavation over 5 feet deep requires OSHA-approved safety measures.
- In response to chlorine leaks, immediate assistance should be sought, with safety gear used for intervention.
- Waterlines must be a minimum of 9 feet away from sewer lines.
- A pressure gauge reading 72 psi indicates the water surface is 166 feet above the gauge.
- A storage tank volume of 978 cubic feet equals approximately 7,315 gallons.
- Calcium hypochlorite typically contains 65%-75% chlorine.
- Operators must notify TCEQ of any significant changes in public water systems.
- Monthly records are required for microbial and chemical tests in public water systems.
- Physical water characteristics include taste, odor, color, turbidity, and temperature.
- Common gases in water, like hydrogen sulfide, can smell like rotten eggs.
- Groundwater, though filtered, may contain high levels of minerals and gases.
- Livestock and septic tanks must be at least 50 feet from public wells.
- Underground fuel tanks must be at least 150 feet away from public wells.
- Feedlots, sewage treatment plants, and landfills are required to be 500 feet from public wells.
- Trenches for large pipes must be a minimum of 18 inches wide or 12 inches wider than the pipe.
- The TCEQ preferred method for cross-connection control is an air gap.
- Cryptosporidium is a chlorine-resistant microorganism found in water.
- Common water meters exclude the inverted Parshall flume.
- Boil-water notices can result from low distribution pressure or unacceptable bacteriological samples.
- Maximum safe chlorine withdrawal from a 150-pound cylinder is 40 lbs in 24 hours.
- Always add acid to water, not vice versa, when diluting acids.
- Normal atmospheric oxygen levels are 20.9%; levels below 19.5% are hazardous without breathing apparatus.
- Chlorine addition forms hydrochloric and hypochlorous acid in water.
- The Safe Drinking Water Act of 1974 is a critical federal law for the water utility industry.
- Non-community water systems examples include RV parks and motels.
- Community water systems must provide annual consumer confidence reports.
- Engineers estimate 130 gallons per person per day for system design in absence of specific data.
- TCEQ mandates community water systems have at least 0.6 gpm production capacity per connection during peak demand.
- The primary water treatment focus is disinfection.
- Potable water must be pathogen-free, safe for consumption, and have chlorine residual.
- Notification to TCEQ is required for changes in water sources or quality impacting the public system.
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Prepare for the TCEQ Class C Water License exam with these flashcards covering essential topics. Learn about the Texas Commission on Environmental Quality, water hardness minerals, and public water system requirements. Great for those seeking to enhance their knowledge in water management and safety.
