Water Treatment Class E Practice Test

These questions are part of the practice quiz. Start practicing

• What is the typical removal efficiency of settable solids in a primary clarifier?
• What is a significant aspect of fluoride's role in water treatment?
• What is the function of a gate valve?
• What minimum number of performance audit samples must certified labs analyze annually?
• What type of samples does the Lead and Copper Rule require?
• What is the purpose of a watershed sanitary survey?
• How many contact hours is one CEU equivalent to?
• Where should turbidity samples commonly be collected from?
• How many continuing education contact hours are required every 2 years?
• What does the term "volatiles" refer to in the context of contaminants?
• What is the purpose of using polymers in water treatment?
• How frequently is sampling typically required for Phase I, II, and V contaminants?
• Where should repeat Total Coliform tests be collected?
• For a public water system to comply with the MRDL, what is the requirement regarding annual averages?
• What is the optimal pH range for using alum in water treatment?
• What is the copper action level for water treatment?
• What is a requirement for laboratories performing analyses for a treatment plant's discharge permit?
• Which condition is associated with groundwater contamination?
• What can result from lake stratification besides changes in temperature?
• Which of the following is NOT a characteristic of confined aquifers?
• At which locations should lead and copper samples be collected?
• What describes the "cone of depression"?
• Which of the following is NOT a component of Total Trihalomethanes (TTHMs)?
• What distinguishes Primary Standards from Secondary Standards in water treatment?
• What term describes the water level before pumping begins?
• What type of microbial contaminant is commonly tested in water treatment?
• When should a filter be backwashed?
• In which stage of a lake's trophic levels is nutrient concentration typically the highest?
• Which waterborne disease is characterized by severe diarrhea and dehydration?
• What is the function of a transformer in electrical systems?
• How many people does a large water system typically serve?
• What is the maximum length of a dead end for a 2-inch line?
• Which factor is NOT included in calculating Hydraulic Residence Time?
• What is often observed in the eutrophic stage of a lake?
• If a water system exceeds a maximum contaminant level (MCL), who is responsible for correcting the issue?
• What is the Maximum Contaminant Level (MCL) for nitrate in drinking water?
• What is the volume required for a Total Coliform sample?
• How many gallons of 12.5% sodium hypochlorite solution are needed daily for a 1.5 MGD flow with a dose of 2.5 mg/L?
• What is the purpose of mixing speed in the coagulation process?
• What kind of triggers prompt a Level 1 assessment?
• What flow rate is often used to express Population Equivalent?
• Which regulation focuses specifically on preventing exposure to Giardia?
• What are the wastes produced during the coagulation process called?
• What is the formula for calculating the volume of a rectangle?
• Which of the following is NOT one of the three rules that require monitoring water within the distribution system?
• What does SCDHEC stand for?
• Who is responsible for issuing and administering operator licenses?
• How are trophic levels classified in lakes?
• Who issues and regulates water and wastewater discharge and treatment permits?
• What is the purpose of Enhanced Softening in water treatment?
• Which of the following is a waterborne disease?
• How are suspended solids expressed in terms of Population Equivalent?
• What is the primary purpose of a rotameter?
• What is the equivalent suspended solids per person per day in grams?
• What must systems exceeding the lead/copper action level monitor for?
• What component is primarily absent in the direct filtration process compared to traditional methods?
• How often are lead and copper samples typically taken in water treatment?
• What is indicated by an E.coli Maximum Contaminant Level (MCL) violation?
• What is required for certified operators to maintain their license?
• What does the Surface Water Treatment Rule require for surface water supply systems?
• How is the population equivalent calculated in terms of flow?
• What is flocculation primarily used for in water treatment?
• For THM samples, where should they be collected in a distribution system?
• Which water treatment plants are classified as Category 1 plants?
• What describes polymers in the context of water treatment?
• What should the drip rate of the packing gland on a centrifugal pump with rope packing be?
• What is the procedure for quarterly THM sampling?
• Which characteristic of water can negatively impact coagulation if not managed properly?
• Which regulatory body's regulations are administered through the Department of Labor?
• What is the significance of the specific weight of sodium hypochlorite solution in disinfection calculations?
• How many pounds of chlorine gas are required per day to disinfect a water supply flowing at 1 MGD with a chlorine dose of 2 mg/L?
• What is a key characteristic of the thermocline layer in a thermally stratified lake?
• For what reasons can an operator's license be provoked?
• Define a Public Water System (PWS).
• What is the first thing to check when starting a gasoline engine?
• Which two protozoa are particularly significant to plant operators?
• How far above a sewer line must a potable water line be positioned?
• Which codes must be strictly observed when working around electrical equipment?
• What is the main health concern associated with Total Trihalomethanes in drinking water?
• Which elements are classified as halogens in water treatment?
• What is the primary goal of The Safe Drinking Water Act?
• What are the two general categories of reporting used by the SDWA?
• What is the required amount of 65% calcium hypochlorite to achieve the same disinfection effect as 16.68 lbs of chlorine gas?
• What is not a goal of the Interim Enhanced Surface Water Treatment Rule?
• What is meant by the term "drawdown"?
• What does SUVA stand for in water treatment?
• What should be done to ensure that chlorine residual exists throughout the system?
• What must be done to find detention time in hours when flow is given in million gallons per day (MGD)?
• Laboratory certification in South Carolina is issued and governed by which authority?
• What is the generally accepted limit for manganese in drinking water?
• What must be checked in a positive Total Coliform sample?
• How long must a new tank be disinfected before sampling for coliform analysis?
• What is the appropriate action to slow a chlorine gas leak?
• What happens when sequestering agents are used in hard water treatment?
• Which category do arsenic and nitrate fall under in terms of contaminant regulation?
• What is the maximum number of people a system can serve to allow all Total Coliform samples to be collected on one day?
• Which process involves the removal of large particles from water?
• What is the classification of contaminants such as lead and mercury?
• How can alkalinity be increased in water treatment?
• What does chlorine demand indicate?
• How long should a new well be disinfected with chlorine?
• Which statement is true regarding Secondary Maximum Contaminant Levels (SMCL)?
• When filling a line with water, what is the recommended method?
• What must water systems implement if they continue exceeding the lead action level?
• Which of the following is classified as a reciprocating pump?
• Which actions are required for compliance under the Safe Drinking Water Act (SDWA)?
• What is CTcalc used for in the context of water disinfection?
• What factor is NOT considered when revoking a lab's certification?
• What condition affects a pump when it is not fully primed with fluid?
• What can the chlorine demand of a water source indicate?
• What is a positive displacement meter?
• Which of the following statements is true regarding certified labs?
• How is an ohm defined?
• What are the primary functions of sequestering agents in water treatment?
• Which of the following is a precursor to disinfection by-products?
• How are unconfined aquifers also known?
• What does the Lead and Copper Rule require from systems with lead/copper exceedances?
• How soon must the public be notified of a Tier 1 violation through newspaper?
• What does voltage represent in an electrical circuit?
• Which of the following is NOT a process in a conventional surface water treatment plant?
• What is the hold time for unpreserved iron and manganese samples?
• What is the basis for the number of samples to be collected for lead and copper analysis?
• What happens if a repeat sample is TC+?
• What does the inactivation ratio (IR) represent?
• When converting dimensions to compute volume, what is the conversion factor from cubic feet to gallons?
• During routine sampling, what percentage should be TC negative to comply with TCR?
• What free chlorine residual level at the extremities of a distribution system indicates presence throughout?
• What is the function of wear rings in pumps?
• What is a consequence of not maintaining proper surface loading rates in a sedimentation basin?
• What could result from a backwash rate that is too high?
• What does chlorine residual refer to in water treatment?
• Which of the following may indicate the presence of a chlorine leak when ammonia is sprayed in the air?
• What is the duration of the compliance period in a compliance cycle?
• What is the main purpose of the Disinfectants/Disinfection By-Products Rule?
• What characterizes a wholesale water system?
• Which characteristic is essential for water to be considered potable?
• What is the lead action level set at?
• Where should chlorine and bacteriological samples typically be collected in a distribution system?
• What does the C-factor of a pipe indicate?
• How do alum and ferric salts function in water treatment?
• What action should be taken if a system exceeds action levels for multiple contaminants?
• Water and wastewater plant construction permits are issued by which organization?
• What does hydraulic residence time (HRT) measure?
• What does chlorine dose refer to?
• What are the two positions of a gate valve?
• What chlorine residual level is recommended after completing a new well?
• What must be verified before starting a centrifugal pump?
• What is the minimum flow rate for line flushing before samples are taken?
• What is the MCL and MCLG for fecal coliform (FC) / E.coli (EC)?
• What characterizes Category 3 water treatment plants?
• What is the maximum advisable rate of chlorine removal from a 150-lb gas cylinder?
• What does the "radius of influence" refer to?
• What is the Maximum Contaminant Level (MCL) set for arsenic in drinking water?
• Under the primary drinking water regulations, which MCL applies to fluoride?
• What is the maximum contaminant level (MCL) for iron in drinking water?
• Which of the following is NOT an example of an organic contaminant?
• What is an acceptable method of disinfecting a sample point before collection?
• Water that is high in color typically requires which adjustment for optimal coagulation?
• What does a Level 2 assessment require after it is conducted?
• Which two factors are crucial when selecting the depth of a lake's intake?
• What should be done when starting a centrifugal pump?
• Who typically conducts a Level 2 assessment?
• What does the secondary maximum contaminant level (SMCL) for fluoride aim to help maintain?
• What are potential disinfection byproducts (DBPs) from ozone treatment?
• How is chlorination dosage typically expressed?
• When calculating chlorine doses for disinfection, which unit is primarily used?
• What triggers a Level 1 assessment under the Revised Total Coliform Rule (RTCR)?
• What is the minimum distance that a potable water line must be from a sewer line?
• What is the MCL for fluoride in drinking water?
• How is specific capacity calculated for a well?
• What is the primary purpose of the Total Coliform Rule (TCR)?
• What characterizes a confined aquifer?
• According to the Interim Enhanced Surface Water Treatment Rule, what is the turbidity requirement for combined filter effluent?
• Which type of faucet is not permitted for sampling THMs?
• What is required after maintenance, construction, or repairs on a tank?
• What is a Watt a measure of?
• How much oxygen do microorganisms consume in a domestic wastewater system per person per day?
• What action should a PWS take if a sanitary defect is discovered?
• What occurs when low oxygen levels are present in water?
• What does a watershed refer to?
• After disinfecting, what is an important step to take with the well?
• What is the purpose of a performance audit in a certified lab?
• What does the "pumping level" indicate?
• What is the purpose of disinfecting a newly completed well?
• What instrument is commonly used to measure the flow rate of chlorine gas?
• What contaminant does the Total Coliform Rule monitor in drinking water?
• Which of the following is NOT a water quality issue related to changes in source water quality?
• What percentage reduction in contaminants does a 1-Log, 2-Log, and 3-Log inactivation represent?
• What must be done before taking a distribution system sample?
• What does the Maximum Residual Disinfectant Level (MRDL) indicate?
• What is the top of the zone of saturation called?
• What is a Treatment Technique violation related to the TCR?
• What is the function of a check valve?
• When must a repeat sample be collected following a TC+ routine sample?
• What type of biological contaminant might affect water quality?
• In water treatment, what is the significance of measuring dissolved organic carbon (DOC)?
• What indicates a Level 2 assessment trigger under the RTCR?
• How is an ampere defined in electrical terms?
• What does surface loading/overflow rate refer to in a sedimentation basin?
• What is the purpose of enhanced coagulation in water treatment?
• What is surging in water treatment?
• Which of the following is an example of an inorganic contaminant?
• At what temperature is the Maximum Total Trihalomethane Potential (MTP) measured?
• Which of the following indicates a violation under the Total Coliform Rule?
• At what depth must access/egress equipment like a ladder be located?
• What is the significance of achieving 99.9% inactivation during water treatment?
• For what reason can a certified lab have its certification revoked?
• What is the maximum contaminant level (MCL) for Total Trihalomethanes under the primary drinking water regulations?
• What organization oversees the regulation of public water systems?
• What is recovery time in the context of water treatment?
• What is considered a secondary drinking water regulation limit for manganese?
• What is one of the required methods for public notification of violations?
• How soon must a positive Total Coliform sample be resampled?
• In water treatment, what does a centrifugal pump primarily do?
• According to the TCR, how often must monitoring occur for systems with greater than 4,900 connections?
• What phenomenon occurs due to temperature differences in water layers, resulting in oxygen depletion?
• What is the optimal pH range for ferric salts?
• What is the primary role of a primary clarifier in water treatment?
• What will cause head loss across a filter to increase?
• In which application is a peristaltic pump typically used?
• At what depth is shoring required when trenching in soil?
• Which substance is primarily used to increase alkalinity?
• What are filter aids primarily used for?
• What does the term Population Equivalent refer to?
• What is the purpose of the Interim Enhanced Surface Water Treatment Rule (IESWTR)?
• What is the secondary drinking water standard limit for total dissolved solids (TDS)?
• What is the classification of a small water system?
• What is a common consequence of agricultural runoff affecting water sources?
• What outcome does precipitative softening aim to enhance in the water treatment process?
• Which indicator is NOT required for monitoring under the Lead and Copper Rule?
• Which factor is not typically important in determining coagulation efficiency?
• What type of plants are classified as Category 2 plants?
• What is a rotameter used for?
• What type of primary contaminant includes small particles suspended in water?
• In a stratified lake, which layer experiences the most significant temperature change?
• Which of the following contaminants does the Disinfectants/Disinfection By-Products Rule particularly focus on?
• What type of measurement does a rotameter provide?
• How do you find the pounds per gallon of a chemical?
• Which of the following processes is part of direct filtration?
• What defines an aquifer?
• How long is the hold time for THM samples?
• What does CT99.9 refer to in water treatment?
• What is used to locate a chlorine gas leak?
• What is well yield?
• What concentration of chlorine is necessary to disinfect a distribution line or tank?
• What must Public Water Systems (PWS) develop according to the TCR?
• What could be a consequence of excessive water draw from an aquifer?
• What type of water quality is generally required for public consumption?
• What happens to alkalinity and pH when coagulants consume alkalinity?
• What is typically used to regulate iron and manganese levels in water?
• What type of particles do alum and ferric salts help to form in water?
• What is the minimum size for a coupling used in a fire hydrant?
• What is the main purpose of adding chlorine to water in a treatment facility?
• What is the formula for the volume of a cylinder?
• What are the symbols for the element Iron?
• Which types of reports are required to be sent to the state by a water provider?
• What can result from inadequate water treatment?
• Which conditions are essential for effective coagulation?
• What must be reported to the state by the end of the day if an EC+ is found?
• Which type of meter is classified as a positive displacement meter?
• What primarily determines the settling velocity of particles in water?
• Which of the following is part of the start-up procedures for a seasonal system?