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Questions and Answers
What does ammonia mixed with chlorine gas create?
What does ammonia mixed with chlorine gas create?
white smoke
What is the most difficult part of a water distribution operator's job?
What is the most difficult part of a water distribution operator's job?
furnish a continuous supply
What is the term for a physical connection between a safe and potentially unsafe water source?
What is the term for a physical connection between a safe and potentially unsafe water source?
cross connection
What type of system is a distribution system?
What type of system is a distribution system?
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How often should dead end mains be flushed?
How often should dead end mains be flushed?
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What condition is caused by excess nitrate?
What condition is caused by excess nitrate?
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What causes water hardness?
What causes water hardness?
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Sewer mains should be ___ ft away from water mains.
Sewer mains should be ___ ft away from water mains.
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What is the pH level of water considered acidic?
What is the pH level of water considered acidic?
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Bacti records are kept for ___ yrs and chemical records are kept for ___ yrs.
Bacti records are kept for ___ yrs and chemical records are kept for ___ yrs.
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Bacti samples have to be returned to the lab within ___ hrs of the collection time.
Bacti samples have to be returned to the lab within ___ hrs of the collection time.
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Color in the water supply should be less than ____ units.
Color in the water supply should be less than ____ units.
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Chlorine is ______ times heavier than air.
Chlorine is ______ times heavier than air.
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What percentage of underground pipe failures are related to improper backfill and bedding?
What percentage of underground pipe failures are related to improper backfill and bedding?
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The spoil bank should be located at least ___ ft away from the ditch.
The spoil bank should be located at least ___ ft away from the ditch.
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The following minimum residuals are ______ mg/L for free chlorine and ____ mg/L for total chlorine.
The following minimum residuals are ______ mg/L for free chlorine and ____ mg/L for total chlorine.
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Public opinion of the water utility is ______ at a standstill.
Public opinion of the water utility is ______ at a standstill.
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A bacti sample should be taken every ____ ft of pipe.
A bacti sample should be taken every ____ ft of pipe.
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What is the most common collection point for a bacti sample?
What is the most common collection point for a bacti sample?
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A standpipe is considered ground storage unless it exceeds _____ ft above the highest ______.
A standpipe is considered ground storage unless it exceeds _____ ft above the highest ______.
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________ protection is the electrochemical method for preventing ________ of metal tanks.
________ protection is the electrochemical method for preventing ________ of metal tanks.
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The _____ is the only cross connection control method approved by _______.
The _____ is the only cross connection control method approved by _______.
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_______ on a pipeline depend on the _____ or coefficient of pipe roughness.
_______ on a pipeline depend on the _____ or coefficient of pipe roughness.
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__________ occurs whenever there is a ______ in the velocity or direction of water flow.
__________ occurs whenever there is a ______ in the velocity or direction of water flow.
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The ______ water pressure required by the rules and regulations is ____ psi under any and all conditions.
The ______ water pressure required by the rules and regulations is ____ psi under any and all conditions.
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100, 150, 200 and 250 are approved classes of _____ ___.
100, 150, 200 and 250 are approved classes of _____ ___.
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What is used to anchor pipe bends?
What is used to anchor pipe bends?
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What is a general deposit of mineral particles evenly along the inside of the pipe?
What is a general deposit of mineral particles evenly along the inside of the pipe?
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Shoring should be used if a ditch is ___ ft or deeper.
Shoring should be used if a ditch is ___ ft or deeper.
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What type of monitoring requires a written sample writing plan?
What type of monitoring requires a written sample writing plan?
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Ladders should be placed every ___ ft in a ditch.
Ladders should be placed every ___ ft in a ditch.
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An oxygen deficient atmosphere is defined as one which contains _____ than ______ % oxygen.
An oxygen deficient atmosphere is defined as one which contains _____ than ______ % oxygen.
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What happens to the discharge as the head increases in a centrifugal pump?
What happens to the discharge as the head increases in a centrifugal pump?
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The operator should leave a ________ of slack in flexible tubing.
The operator should leave a ________ of slack in flexible tubing.
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What is the most common type of water meter?
What is the most common type of water meter?
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Safe withdrawal weight from a 150 lb cylinder is ___ lbs and 400 lbs from a ____ ton cylinder.
Safe withdrawal weight from a 150 lb cylinder is ___ lbs and 400 lbs from a ____ ton cylinder.
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What is the most common valve used?
What is the most common valve used?
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What is the most commonly used fire hydrant in distribution systems?
What is the most commonly used fire hydrant in distribution systems?
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What feature do hydrants have in case they are struck by a vehicle?
What feature do hydrants have in case they are struck by a vehicle?
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Controlling valves regulate pressure flow ____ and flow _______.
Controlling valves regulate pressure flow ____ and flow _______.
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Study Notes
Water Operator License Exam Notes
- Ammonia and chlorine gas react to create white smoke, a significant safety concern.
- A primary challenge for water distribution operators is ensuring a continuous supply of water.
- Cross connection refers to the physical link between a safe water source and one that may be unsafe, necessitating strict control measures.
- A distribution system is typically designed as a looped system, enhancing water flow and pressure maintenance.
- Dead end mains require flushing every month to prevent stagnation and contamination.
- Excessive nitrate levels in water can lead to blue baby syndrome, a serious health issue.
- Hardness in water is mainly due to the presence of calcium and magnesium ions.
- Sewer mains must be at least 9 feet away from water mains to prevent contamination.
- Water with a pH below 7 is classified as acidic, which can affect plumbing and water distribution systems.
- Bacteriological (bacti) records are maintained for 5 years, while chemical records are held for 10 years.
- Bacti samples should reach the lab within 30 hours post-collection to ensure accurate results.
- Acceptable color in water supplies should not exceed 15 units, indicating water quality.
- Chlorine gas is 2.5 times denser than air, making it a hazardous material in water treatment.
- About 90% of underground pipe failures stem from improper backfill and bedding during installation.
- Spoil banks from excavations should be placed at least 2 feet away from the ditch to avoid collapse.
- Minimum residuals for free chlorine is 2 mg/L and total chlorine is 0.5 mg/L, crucial for disinfection.
- Public perception of water utilities is ever-changing and cannot remain stagnant.
- Bacti samples are required every 1000 feet of pipe to monitor water safety.
- The common point for gathering a bacti sample is a water tap located outside a house.
- A standpipe is deemed as ground storage unless it exceeds 80 feet above the highest service connection.
- Cathodic protection is an electrochemical approach designed to prevent corrosion in metal tanks.
- An air gap is the sole cross connection control method recognized by TCEQ (Texas Commission on Environmental Quality).
- Friction loss in pipelines is determined by the coefficient of pipe roughness, known as the C factor.
- Water hammer is a phenomenon resulting from sudden changes in water flow velocity or direction, which can damage infrastructure.
- Regulations require a minimum water pressure of 20 psi under all conditions to ensure safe delivery.
- Approved working pressure classes for water systems are 100, 150, 200, and 250 psi.
- Concrete is typically used to anchor bends in piping systems.
- Tuberculation refers to the even distribution of mineral deposits inside the pipes, which can affect water quality.
- Shoring is required for ditches that are deeper than 5 feet to ensure worker safety during maintenance.
- A written sampling plan is mandated for coliform monitoring, ensuring compliance with health standards.
- Ladders should be installed every 25 feet in deep ditches for safe access.
- An atmosphere is considered oxygen deficient if it contains less than 19.5% oxygen, which poses safety risks.
- In centrifugal pumps, as the head increases, the discharge decreases, a fundamental principle in pump operation.
- Operators should allow a gooseneck of slack in flexible tubing to accommodate movement and prevent breaks.
- Positive displacement meters are the most frequently used type of water meters in residential and commercial use.
- Safe withdrawal from a 150 lb gas cylinder is limited to 40 lbs, while up to 400 lbs can be taken from a 1-ton cylinder.
- Gate valves remain the most common type of valve used within water distribution systems, providing efficient flow control.
- Dry barrel hydrants are the standard type used in water distribution systems for firefighting.
- Breakaway points on hydrants allow them to detach upon impact, minimizing damage and maintaining functionality.
- Control valves play a critical role in regulating both pressure flow rates and the direction of water movement through the system.
- Electricity is favored as a power source for distribution systems due to its reliability and efficiency in operation.
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Prepare for the Class C Water Operator License Exam with these essential flashcards. Each card covers key terms and definitions crucial for understanding water distribution and safety protocols. Enhance your study routine and boost your confidence before the exam.
