Ohio ABC Class 1 Drinking Water Practice Exam

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• Why is it essential to report MCL violations promptly?
• What is the definition of decant?
• What is the purpose of keeping process records of water and finished water quality?
• When oxidized, how do iron and manganese change the water's color?
• After respiratory problems, what is the first effect of exposure to chlorine that generally manifests?
• Which of the following is not a term used to rank the distance between bars in a bar screen?
• When converting fluid measurements, which of the following is not a common unit?
• In water treatment, how is the effectiveness of chemical dosage typically determined?
• What are the basic methods for controlling corrosion or scaling in water systems?
• The movement of water from leaves, grasses, and other plants to the atmosphere is called?
• Which physical property is significant for water treatment?
• What term is used to describe the process of water changing from a liquid to a vapor?
• Where land is relatively flat, how does runoff behave?
• Which function of the hydrological cycle is described as water moving with the air currents in the atmosphere?
• How is the effectiveness of disinfection evaluated by the total coliform rule?
• Which organism is the hardest to kill among the following?
• What process is primarily affected if turbidity levels exceed the recommended values before filtration?
• What is the primary unit used to measure flow rate in the water industry?
• What term describes the process of replacing the final digits of a number with zeros?
• What is the common term for the combined processes of mixing, flocculation, sedimentation, and filtration?
• What process involves the removal of contaminants from water before it is released into the environment?
• What is the most common operational issue encountered with wells?
• What is the treatment technique requirement for copper and lead according to the regulations?
• What aspect of record-keeping is crucial for optimizing performance in water treatment?
• What are iron deposits caused by the corrosion of cast-iron mains called?
• What is a microstrainer?
• What is the primary effect of friction in hydraulic systems?
• What regulation is intended to protect drinking water consumers from health consequences related to residual disinfectants and disinfection by-products?
• Which organization oversees consistency among laboratories in analytical results for certified analyses?
• In which pH range does alum work most effectively?
• When raw water contains little or no noncarbonate hardness, it can normally be softened through the use of?
• What are small, prefabricated units designed for water treatment called?
• Which of the following is the principal scale-forming substance in water?
• The main purpose of mechanical seals is to:
• What is the definition of corrosion?
• Powdered activated carbon is usually added to the treatment process?
• What process is typically associated with the removal of hardness from water?
• How many million gallons are equivalent to 318 acre-feet?
• Which regulation sets the performance goals for filters?
• What is an example of feed-forward control?
• The number of monthly distribution system chlorine residual samples required is based on:
• What is one or more short lengths of pipe, usually perforated, that disperses chlorine solution into the main flow of water?
• What does the CT disinfection requirement assess?
• Drinking water that is aesthetically acceptable is considered?
• What is the most inexpensive chemical available for fluoridation?
• What are the adverse effects of manganese as a secondary contaminant?
• What is the most important consideration in an automatic startup after a power failure?
• What type of electrical current flows continuously in one direction?
• What is one of the main benefits of using package treatment plants?
• A water treatment system that uses a variety of methods to improve water quality is known as?
• What element is a dark reddish-brown liquid that vaporizes at room temperature?
• In terms of water treatment, what is the primary objective of using fluoride?
• What does scientific notation allow people to do?
• What are the primary reasons to control corrosion and scaling in drinking water?
• What process does recarbonation refer to?
• Which of the following best describes the flavor effects of manganese in beverages?
• Which method is used to improve the removal of certain contaminants in water through the addition of air?
• In solids-contact basins, how often should the solids concentration be determined?
• Which statement regarding viruses is incorrect?
• Which type of pump is widely used for small, private wells due to its low initial cost, but rarely used in public water systems due to low efficiency?
• What is a primary concern regarding the presence of iron in drinking water?
• Which gas, heavier than air and with a strong odor, is often found in groundwater?
• Which component is essential to manage leakage in rotating equipment?
• Which fluoride compound is typically not used in water fluoridation due to its high cost?
• Which aspect of water treatment involves the use of membranes to selectively remove ions?
• In a treatment plant, when you change the input flow, what should you monitor?
• Which personal protective equipment is essential during chlorine repairs?
• Where is the best place to keep main flushing records?
• How do ionic forces relate to the behavior of colloidal particles?
• The process whereby water moves with the air currents in the atmosphere is called?
• Teeth are likely to become pitted when fluoride concentrations in drinking water exceed which level?
• The flow rate of liquid expressed in ____ is analogous to the flow rate of electricity expressed in amperes.
• How is water hardness commonly expressed?
• Which type of wells are commonly used near the shore of a lake or near a river to obtain a large amount of relatively good quality water?
• What type of records is vital for anticipating chemical inventory needs?
• Which of the following is not a reason that corrosion and scaling are controlled?
• What is the most important reason to reduce turbidity?
• Which process is used to concentrate sludge?
• When disinfecting water wells using free chlorine, what is the recommended exposure time and concentration?
• What are the most common methods of algae control in lakes and reservoirs?
• What device consists of a pair of metallic plates separated by an insulating material called a dielectric?
• What type of electricity is involved when charges are not moving?
• What comprises carbonate and noncarbonate hardness?
• What is the typical detention time designed for flocculation basins during treatment?
• What area of a basin receives the settled solids and keeps them separated from other particles?
• What term refers to the rate of water withdrawal that a well can supply over a long period of time?
• What is the impact of high turbidity levels on disinfection processes?
• What is the MCL for lead in mg/l?
• What factor should be evaluated in the bed surface of a water treatment system?
• In the ion-exchange softening process, once the resin can no longer soften water, it must be?
• Why is caustic-soda softening not a popular process despite its effectiveness?
• What is the primary purpose of backwashing a filter?
• What are the main causes of algal blooms?
• Which process works best for sequestering manganese?
• What is the term for the process used in water treatment to dissolve air into water?
• What type of water quality problems are commonly observed in groundwater?
• What treatment method is known for its effectiveness in eliminating pathogens without affecting taste?
• Which system allows operators to gather and display operational data?
• At which range of temperatures will fusible plugs on chlorine cylinders melt in Fahrenheit?
• Which of the following statements is NOT true regarding suspended solids?
• What is a common application of scientific notation in water treatment?
• When converting 7.7 mgd into cfs, what is the correct result?
• What type of compounds do not contain carbon?
• What is a secondary benefit of maintaining chemical usage records over time?
• Total hardness in water is primarily due to calcium, magnesium, and which other component?
• Which treatment method is characterized by low maintenance and operational costs?
• How often should sedimentation basins with mechanical sludge removal equipment be drained and inspected?
• According to the SDWA, how is a public water system defined?
• What is the commercial purity range of fluorosilicic acid?
• When should chlorine be added in a treatment system relative to other processes?
• Which of the following is a significant hazard to be aware of in water treatment plants?
• Which chemical process is often faced with difficulty regarding residual stability?
• What is the required time frame to report an acute MCL violation to the public?
• What is classified as a confined space?
• What is the opening size for medium-ranked fixed screens or bar screens?
• In a water treatment plant using direct filtration, which step of conventional treatment is excluded?
• Which oxidant should be fed as early as possible in the treatment process for complete reaction before entering the distribution system?
• What effects does properly dosed activated silica have on coagulation?
• Which plant type grows in shallow water on or near the shoreline, rooting in the bottom mud?
• Which treatment method helps to control high turbidity in well water?
• In terms of communication with external parties, how should water operators approach sharing information?
• In the chlorination process, what term refers to the point where the addition of more chlorine produces free residual chlorine?
• Which measurements are used to express the concentration of solute in a solution?
• Providing several treatment processes that can each remove a water contaminant is an example of what?
• Which screening method is effective in preventing fish and debris from entering treatment facilities?
• What natural electrical force is responsible for keeping colloidal particles separated in water treatment?
• Which electrical unit is used to measure a material's opposition to the flow of electricity?
• What process is typically performed after a well is constructed to ensure it is safe for use?
• Which fluoride compound is commonly known as a dry feed chemical?
• What effect do soft waters with a pH of less than 7 generally have on lead and copper?
• How often should chemical usage records be reviewed for efficacy?
• An artesian aquifer could occur in a(n):
• Which substance is typically used to disinfect the gravel packing of a groundwater well?
• Which type of pump is useful for moving water that contains solids, as in raw-water intakes?
• What type of treatment does not involve sedimentation?
• What water quality problems can be caused by impoundment stratification?
• Which of the following is not typically included in a sanitary survey?
• If samples arrive at a laboratory past the specified holding time following collection, what must the laboratory do?
• What type of filter combines adsorption and oxidation to remove iron and manganese?
• Which fluoride chemical requires careful handling due to its acidity?
• What is considered a sanitary survey?
• What concentration of chlorine is used to regenerate virgin greensand?
• The term for water released from an aquifer is?
• What is the MCL for nitrate in mg/l?
• Which of the following is not a class of employees designated to work in confined spaces?
• When should polyphosphate be injected into the process for sequestration of iron and manganese from a well?
• Which gas produced by certain types of bacteria can accelerate the corrosion process?
• What membrane process is primarily referred to as "softening" in water treatment?
• What should be kept in an organized fashion for every chemical used in a water treatment plant?
• What natural source of contamination is most commonly removed through pre-treatment processes?
• Under the Stage 1 DBPR, how is compliance for TTHM and HAA5 determined?
• Regular verification of chemical handling procedures is important for ensuring what?
• In what direction does water naturally move?
• What term describes particles suspended by the natural action of flowing water?
• What enables the continuous adjustment of chemical feed in a treatment plant?
• What are the principal cations that cause water hardness?
• Why is ultraviolet disinfection particularly suitable for treating groundwater?
• Why are filter operation records considered important?
• How often should the fluoride concentration of treated water be measured?
• What is the definition of a radical in chemistry?
• Which two factors most impact the effectiveness of chlorination?
• Which of the following is the ideal indicator for pathogens in water?
• What is the purpose of flocculation basins in water treatment?
• Which of the following is NOT generally considered a pathway for water contaminants?
• What is the process of sequestration in water treatment?
• What is the function of a well casing?
• What is the main source of drinking water for many communities?
• Electricity is often classified as either static or what?
• Sodium fluoride is characterized by which of the following properties?
• Which part of a pump houses the packing or mechanical seal?
• What can any material that forms a precipitate with soap be generally called?
• Friction reduces the flow of water through a pipe like ____ reduces the flow of electricity through a wire.
• Which organisms are used to assess the presence of pathogenic bacteria in water?
• Where should safety data sheet (SDS) information be stored?
• Which substances are commonly removed by the process of aeration in water treatment?
• What is the recommended turbidity level of settled water before it is applied to the filters?
• What is the treatment process that controls corrosion or scaling known as?
• How is linear measurement defined?
• What typically occurs when there are changes in operating conditions at a treatment plant?
• The presence of iron or manganese in the distribution system often results in which effect?
• From which of the following three areas are samples generally collected?
• Which of the following can be used in place of lime and soda ash for softening and will remove both carbonate and noncarbonate hardness?
• What is the pretreatment process used to remove gravel, sand, and silt from the raw water?
• What condition can prevent effective disinfection due to particles suspended in the water?
• Ozone is known to be very unstable in water. What challenge does this present in treatment processes?
• The buildup of corrosion products is known as?
• Methane is easily removed from water due to its slight solubility. What method is most effective for this removal?
• What role does fluoride play in the diet?
• What does the zeta potential measure regarding particulate matter in water treatment?
• Under no circumstances should a composite sample be collected for which type of analysis?
• What is the treatment process used to destroy or inactivate disease-causing organisms called?
• What does SCBA stand for?
• What determines the effectiveness of coagulation using alum?
• What is the primary goal of disinfection in water treatment?
• What is a key reason for maintaining plant chemical usage records?
• What type of personal protective equipment supplies safe breathing air to the wearer?
• What is the role of USEPA in water quality analysis?
• If an operator detects an issue through trend analysis, what should they prioritize?
• What area of a basin provides the calm area necessary for the suspended material to settle?
• What is an indicator that a filter is ripening?
• When a chlorine cylinder or container is changed, how often should a new gasket be used?
• To prevent leakage at the point where the shaft protrudes through the case, which is used to seal the space between the shaft and the case?
• What must a water system do if it receives a positive E coli repeat sample?
• What is a commonly accepted indicator of drinking water quality?
• What is the MCL for copper in mg/l?
• How frequently do water plant operators take samples?
• The place where groundwater accumulates is called a(n):
• To limit construction costs, a dam should be built in which way?
• What role do well screens play in water wells?
• Which of the following are considered ideal indicators for pathogens in water?
• Compared to gravimetric feeders, what are two advantages of volumetric feeders?
• What is one of the primary uses for a searchable database in water operations?
• Virgin greensand can be regenerated by soaking the filter bed in a chlorine-containing solution of what concentration?
• What is a concern regarding automated control of treatment plant processes?
• What does the term "static water level" refer to in the context of wells?
• What is also called clarification and involves the removal of settleable solids by gravity?
• What are the two main chemicals responsible for water hardness?
• Which method is commonly employed for well construction to ensure its integrity?
• Which device collects the settled water as it leaves the sedimentation basin?
• Which type of fluoride chemical is recommended for use in downflow saturators?
• In shallow-depth settling units, at what angle must modules be slanted to be self-cleaning?
• What key factor can increase the risk of contamination in drinking water systems?
• What process involves transferring ions through a membrane due to an applied electric current?
• Which element is not typically considered in evaluating the performance of screening systems?
• Which type of pump has an impeller rotating in a channel of constant cross-sectional area, imparting mixed or radial flow to the water?
• What details are included in complete operating records for screening equipment?
• Which factor is least likely to impact the zeta potential in water treatment?
• Fluoride is fed into the water system using either a solution feed system or a(n):
• What is the area in square feet of a circular reservoir with a diameter of 411 ft?
• Who is responsible for safety and safe working conditions associated with a water utility?
• In conventional water treatment plants, flocculation basins are typically designed for which type of flocculation?
• What does SCADA stand for and what is its purpose?
• What must you know in order to solve for an unknown value in an equation?
• What does MCL stand for in the context of drinking water regulations?
• Which of the following terms describes the minimum amount of disinfectant needed to effectively treat water?
• What is the most common in-situ well treatment applied to reduce iron bacteria?
• Which of the following is a principal problem associated with preliminary treatment screening?
• Which type of pump is designed so the entire pump and motor unit can be placed below the water level in a well?
• Which of the following is the only type of pump that can be operated against a closed valve?
• What is defined as a single-volume sample collected at one time from one place?
• If you mix 8.25 lbs of soda ash into 45 gallons of water, what percentage of soda ash is in the slurry?
• Which of the following is a common indicator of effective disinfection?
• What method is used for the removal of sediment and suspended materials before disinfection?
• How often should operators record bad expansion measurements and the condition of media?
• Fluoride's role in preventing dental cavities is primarily due to its ability to:
• To find the volume of water in a tank, which measurement is essential?
• A term used to describe cloud formation is?
• Streams that flow only occasionally, usually only during and shortly after a rain, are called what?
• As solids settle to the bottom of a sedimentation basin, what develops?
• What are three main advantages of slow sand filters?
• A small amount of fluoride in the diet is essential for what function?
• What is a concern when using direct river intake for the water supply to a drinking water treatment plant?
• What are some invasive species that require monitoring and treatment?
• Coliform bacteria are a common indicator of?
• How are van der Waals forces defined in the context of particle interaction?
• The purpose of packing is to:
• What is the purpose of using potassium permanganate in water treatment?
• Bar screens assemblies are installed in a waterway at what angle from the horizontal?
• How often should records of the amount of fluoride in finished and raw water be kept?
• Which part of the human body is the most vulnerable to allowing microorganisms to enter?
• Which function of the hydrological cycle is described as water that has collected as snow or ice being released as liquid?
• What is the purpose of presedimentation in water treatment?
• What is the last step in the process of well construction?
• Which statement accurately describes the nature of colloidal particles?
• What is a common term for a sample that is taken without prior planning and represents a specific time?
• What is a common method for adding fluoride to drinking water?
• What operation is commonly performed after screening in a water treatment facility?
• What are the two principal chemicals that cause water hardness?
• Why has the percussion drilling method, or cable tool method, declined in use?
• What role does straining suspended particles play during the filtration process?
• The best place to control organic matter in drinking water is?
• Static electricity is often referred to as what?
• Process recovery is influenced by which factor?
• What is the maximum contaminant level for nitrates in drinking water?
• What is the maximum contaminant level for arsenic?
• What is the equivalent value of 35.1 cfs when converted to gpm?
• What are the advantages of mechanical mixers in water treatment?
• What is the general rule of thumb when talking to reporters?
• What is one reason that automatic control systems are often not installed in water treatment plants?
• What type of intake is usually located next to a lake or river to pick up seepage from surrounding sediment?
• What is a common indicator of well water contamination?
• What is the smallest particle that retains the characteristics of an element?
• What is typically the first pretreatment provided in most surface water treatment systems?