North Carolina C-Well Exam 2 Practice Test

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• Which statement best describes the water system sampling responsibility?
• What is the function of a check valve in a well system?
• The number of monthly bacteriological samples required for analyses is based on which factor?
• How do the factors such as daily demand, peak demand, and system pressure influence the required storage tank size?
• How would you perform a simple field well yield test?
• What is the primary purpose of accurate recordkeeping of well construction?
• The treatment process designed to kill pathogenic organisms is called which?
• Primacy in drinking water regulations refers to which concept?
• Which method is used to remove iron from a well supply?
• What is groundwater transmissivity and why is it important for well performance?
• During flow monitoring, which value is not typically tracked with a flow meter?
• Which statement best describes an artesian well in terms of contamination risk?
• What is the purpose of a sanitary survey in a well installation project?
• Under the Safe Drinking Act, it is the duty of the water purveyor to deliver potable water of proper quantity only as far as the:
• A standpipe is considered ground storage unless it exceeds ___ feet above the highest service connection.
• Which process describes water returning to the atmosphere via evaporation and plant transpiration?
• Which factor influences the selection of screen size and slot width in a well screen?
• How would you interpret persistent sand or grit in produced water?
• Name two common sources of groundwater contamination near a well.
• What is cavitation in pumping systems?
• Which of the following statements about confined-space safety is true?
• The frost line is used as a reference to determine bury depth for water mains; if the frost line is at 18 inches, what is the minimum burial depth required for water mains?
• In the proper well abandonment sequence, which step is typically performed last?
• The primary origin of coliforms in water supplies is
• Water hammer is most likely caused by:
• Which statement best describes a pressure tank's function in a well system?
• Why must aquifer properties be considered when siting a well near potential contamination sources?
• Which measures may be needed to prevent corrosion after chlorination?
• A common method for removing hydrogen sulfide from water is which?
• Which statement best describes groundwater transmissivity?
• What are the key steps in proper well abandonment?
• What are the main water quality parameters (pH, hardness, TDS) and how do they influence treatment decisions?
• Which method can remove high iron contents from a well supply?
• The presence of total coliforms in drinking water most strongly indicates which of the following?
• Which condition indicates vulnerability to surface water intrusion?
• What is the physical connection, direct or indirect, which provides the opportunity for nonpotable water to enter a conduit, pipe or receptacle containing potable water?
• If an initial sample is positive for total coliforms and a repeat sample is positive for fecal coliform or E. coli, notice to the public must be given within how many hours?
• The longest a 2 in. water main can run is how many feet?
• The main goal of preventive maintenance is to avoid future equipment problems, which is achieved by:
• The leakage of seal water around the packing on a centrifugal pump serves primarily as which of the following?
• An operator uses which reagent to test for residual chlorine?
• Which description best defines chlorine demand?
• What safety precautions are essential when working near energized pump equipment?
• Which chemical is used to neutralize residual chlorine in treated water?
• In the context of activated carbon, which term describes the mechanism by which it removes taste and odors?
• The primary reason for using dry barrel fire hydrants is to:
• How does a gravel pack function in well construction?
• What term identifies a geologic formation that can store and transmit groundwater?
• Which statement about the sanitary seal is true?
• In preventive maintenance planning, which activity is most characteristic?
• Under NC PWSS Rules, the control and upward adjustment of the pH of drinking water is required if it is below what value?
• Which parameter among pH, hardness, and TDS influences taste and potential compliance?
• In a centrifugal pump, which component is designed to move water?
• Which of the following terms refer to excessive internal pressure, which may be several times the normal operating pressure and can seriously damage hydropneumatic tanks, valves, and the piping network:
• What is the purpose of a well log?
• The Total Coliform Rule is based first on which criterion?
• Define drawdown and explain its significance for well yield testing.
• A pump in continued service should be inspected for cleanliness and leakage at least:
• What is the function of grout in the annular space of a drilled well?
• When calcium hypochlorite is used for disinfecting a water supply, which method describes the recommended approach?
• Which indicator organism is used to determine contamination of drinking water?
• After a new water main is installed and pressure tested it should be:
• Standard pumper-connection fire hydrants should not be installed on water mains smaller than how many inches in diameter?
• What do prepared water sample bottles for bacteriological testing contain?
• When bringing community water service to a home with a private well, what is the most positive method of preventing a cross connection between the two systems?
• What is the purpose of a pumped yield test and which data should be recorded?
• A pump emits a pinging sound. What is the most likely cause?
• What is the purpose of calculating total dynamic head (TDH) in selecting a well pump?
• Under NC PWSS rules, what action is required if drinking water pH is below 6.5?
• Aeration in water treatment plants is used to:
• Which device is a backflow prevention measure mentioned as an option in the cross-connection context?
• In North Carolina, drinking water quality standards are enforced by which agency?
• A single sample taken without considering the time of day or rate of flow is called a
• An electrical fire is classified as which class of fire?
• Sodium thiosulfate is used to
• When inspecting a pump in continued service, the two aspects specifically mentioned are:
• How does chlorination affect distribution system safety and corrosion control?
• A primary health risk associated with microorganisms in drinking water is which of the following?
• Regarding testing and reporting for water systems, which is true?
• Which statement best distinguishes a confined aquifer from an unconfined aquifer?
• How does the concept of aquifer transmissivity relate to well yield?
• In prepared water sample bottles used for bacteriological examination, what effect does sodium thiosulfate have on the sample?
• What is the role of maintenance schedules in sustaining water quality from a well system?
• Activated carbon combats taste and odors by which process?
• On a switch that has been tagged and locked out, what must the warning tag include?
• Which treatment step is used to reduce disease-causing organisms and is typically mandated for drinking water safety?
• Before entering a confined space, which hazards should be mitigated?
• Name two water treatment processes used to disinfect well water and when they are used.
• Bacteriological testing in drinking water and which organism is commonly tested?
• The continuous exchange of water between the earth and the atmosphere is called what?
• How many testable connections trigger the requirement for a certified Cross Connection ORC?
• What does a standing column test measure and indicate?
• What are common signs of a failing well pump?
• A supervisor could be responsible for an accident, in part or completely by:
• Which chemical is most often used to disinfect public water supplies?
• During confined space entry, how often must the space be monitored for hazardous atmospheres?
• What is the term for the drop in water level during pump operation that is used to assess a well's productivity?
• All routine coliform test results must be reported to the state by the ______ of the following month:
• What term describes the area around a pumped well where the groundwater is lowered due to pumping?
• What is the purpose of a pressure tank in a well system?
• The main purpose of pump priming is to:
• Color in water supply should be less than ______ units?
• Which component helps prevent backflow after the pump stops?
• The term primacy means which of the following?
• Which factor largely determines the drawdown rate of a well under pumping?
• Excessively hot pump bearings are most likely caused by which condition?
• In a pumped yield test, what does 'recovery' refer to?
• What is the purpose of an anti-siphon device or air gap in a distribution system?
• What is the primary purpose of an electrical lockout device?
• Lead in drinking water can result in which health effect?
• Beards or long sideburns may prohibit an operator from safely:
• Which measures are recommended to prevent backflow from irrigation systems into domestic wells?
• Which statement about dry barrel fire hydrants is true?
• Which factors influence the selection of screen size and slot width in a well screen?
• To ensure water supplied by a public water system meets requirements, the water system operator must regularly collect samples and:
• Which statement best describes a benefit of preventive maintenance?
• The component parts of a well include all of the following except:
• If the line is dead-ended, the maximum number of connections is:
• When assessing hazards in confined spaces, which pair is most critical to monitor?
• Which two water levels define the drawdown in a pumped well?
• An average percentage range for unaccounted-for water in a fully metered system is which range?
• Which safety practice ensures the equipment is de-energized before maintenance?
• Which statement is NOT a common cause of low water pressure in a well system?
• What data help determine the storage size based on demand and pressure?
• What is static water level, and how does it differ from drawdown during pumping?
• Which practice demonstrates compliance with regulatory sampling reporting for water systems?
• Iron in water can cause:
• For 5 or more testable connections (BFC) Bolted Flange Plate Connections, a certified ______ _________ _______ is required.
• Which process describes water movement from the surface into the soil, replenishing groundwater?
• In pumping systems, what effect does venting have?
• The foot valve is installed at the end of a suction pipe to do what?
• Check valves are used to prevent which condition?
• All routine coliform test results must be reported to the state by the tenth day of the following month.
• In yield testing, which statement best describes a step-drawdown test?
• What is the primary purpose of a flow meter in a well system, and which values are typically monitored?
• What steps should be taken if a water sample tests positive for total coliform bacteria?
• What is the water table defined as?
• When entering a confined space, which two safety concerns are most important?
• What is the role of grout and cement in creating a sanitary seal at the top of the borehole?
• Which statement best defines static water level in relation to pumping and drawdown?
• Which component of a centrifugal pump moves in the water?
• The component of a centrifugal pump installed on the end of a suction pipe to hold the priming is called which?
• If the pumping rate is increased, what happens to the cone of depression?
• A preventive maintenance program primarily helps reduce downtime by
• When performing a yield test, what is the difference between a step-drawdown test and a constant-rate test?
• Why can air binding occur, and how can it be mitigated in a pumping system?
• For a safe confined-space entry, which conditions should be checked first?
• Which factor is not used to determine the number of monthly bacteriological samples required for a public water system?
• Which of the following is the minimum sample size for total coliform analysis?
• Which measures help prevent backflow from irrigation systems into domestic wells?
• What is the primary purpose of well casing and surface seal?
• Nitrates in drinking water are most closely linked to which health outcome?
• What media is used in the confirmed test for total coliform bacteria?
• A major health risk associated with nitrates is which of the following?
• How does poor well development affect long-term yield?
• A primary source of volatile organic chemical (VOC) contamination of water supplies is:
• How is pump efficiency defined, and why does it matter?
• Reciprocating positive-displacement pumps are also known as which type?
• How can you identify if a well is vulnerable to surface water intrusion?
• Water mains must be buried at least how many inches deep?
• Fluoride testing limit is a maximum of:
• What happens if fines are allowed to enter the well screen?
• Which of the following well types is most protected from surface contamination?
• Why is a sanitary seal above the aquifer important?
• Which component is included in a typical residential well system to regulate water pressure?
• Which factor is directly addressed by a sanitary design standard during well installation?
• Which statement about total dynamic head (TDH) is correct?
• Name key components of a typical residential domestic well system.
• What is the required minimum sample size for total coliform analysis?
• North Carolina rules governing public water systems require records of bacteriological analyses be kept on or near premises for a minimum of how many years?
• A positive-displacement pump that uses pistons to move fluid is called which?
• If a fuse continues to blow, what is the appropriate action?
• Which statement describes the correct method for using calcium hypochlorite for disinfection?
• Which agency requires the well permit and construction report for new wells in North Carolina?
• Why is an expansion tank used in a well system?
• What is the purpose of the sanitary seal and annular grout in well construction?
• What is the primary purpose of a preventive maintenance program?
• Disease-causing bacteria are known as which of the following?
• After a new main is installed, which chlorine-related step is described as required prior to flushing?
• The shaft speed of an electric motor is most commonly expressed in which unit?
• Which federal act governs drinking water quality nationwide and influences NC well regulations?
• The presence of total coliforms in drinking water indicates:
• Which of the following is the minimum diameter for mains to accommodate standard pumper-connection hydrants?
• What documentation must be submitted to NC DEQ for a new well?
• Which action is essential for compliance with water quality regulations?
• Which of the following is not a standard unit used to express shaft speed?
• How often should water samples be taken for routine screening of a community water system in North Carolina?
• How would you identify the need for well development if initial discharges show fines or iron staining?
• The term aquifer relates to which of the following?
• If a standpipe exceeds 80 feet above the highest service connection, it is no longer considered ground storage.
• Why is it important not to rinse out the sample bottle before collecting a bacteriological sample?
• The leakage of seal water around the packing on a centrifugal pump is required because it acts as a coolant. Which option best reflects this?
• Which statement best describes the purpose of activated carbon in water treatment?
• Explain the difference between static head and total dynamic head (TDH) in a pumping system.