FDEP Drinking Water Operator C Practice Exam

These questions are part of the practice quiz. Start practicing

• Which is NOT a method of protecting groundwater and wellheads long-term?
• What is a key reason operators regularly inspect and clean hypochlorite dosing system components?
• What is the free chlorine residual requirement for a distribution system?
• Why is hardness in water generally considered problematic?
• What is the purpose of flow meters in a water distribution system?
• In the Galvanic Series, which type of metal is more active for corrosion?
• What type of device is considered to provide maximum protection against back flow?
• Why is well grouting important in water systems?
• Which of the following is NOT a function of chlorine in water treatment?
• What is a common user complaint caused by electrochemical corrosion?
• How does a dielectric union prevent corrosion?
• What is a Galvanic Cell in relation to water systems?
• Which of the following is a form of chlorine?
• What is one effect of high levels of dissolved solids on water quality?
• Which type of water treatment plant has a higher disinfection byproduct formation potential?
• Which of the following MCLs is the highest permissible level for drinking water?
• Which factor does NOT affect chlorination effectiveness?
• Which of the following is NOT a limitation of the lime softening process?
• What are chloramines?
• What causes galvanic corrosion?
• Which factor is NOT typically associated with water treatment processes?
• Which type of maintenance is described as proactive in nature?
• Which of the following is a common problem found in plumbing and pumps?
• Which contaminant category includes viruses and bacteria?
• What is the Maximum Contaminant Level (MCL) for Bromate in drinking water?
• In which situation would you set up a proportion problem?
• What is tuberculation in the context of water pipes?
• Water hammer is primarily caused by what?
• How is a cross-connection defined?
• What could result from improper storage of Calcium Hypochlorite?
• What condition defines back-flow in a water system?
• What is the role of an electrolyte in a galvanic cell?
• Total Hardness can be expressed as the sum of which two forms?
• What is a common chemical coagulant used in water treatment?
• What is Bentonite used for in water treatment?
• When considering safety in confined spaces, what is the safe oxygen level considered?
• What is the maximum time frame for issuing a boil water notice after receiving test results?
• What process destroys all organisms, including pathogens?
• A positive Langelier Index indicates what characteristic of water?
• Which water source generally results in higher TTHM formation due to organic material presence?
• What is the primary reason that a softening plant has a higher DBP formation potential?
• What does "lake turnover" primarily impact?
• What is the MCL for Nitrate in drinking water?
• What effect does solid chlorine have on pH levels in water?
• The presence of which type of bacteria can lead to musty odors in water systems?
• What is the typical hardness level achievable by chemical precipitation treatment?
• Why is it important to monitor turbidity in drinking water systems?
• What does the presence of bromide ions in water typically lead to?
• What should be done if the chlorine draw-off rate is too high?
• What is the primary purpose of a jar test?
• When adjusting a liquid chlorine feed pump, what is the correct protocol?
• What is the primary purpose of disinfection in water treatment?
• Which of the following symptoms is associated with inhaling fluoride?
• Which of the following is a negative effect of corrosion?
• When must repeat samples be collected after a positive coliform result?
• What is the main consequence of cavitation in a pump?
• Can dissolved oxygen contribute to corrosion?
• What is an example of a process used for chemical precipitation of hardness?
• Which of the following factors can lead to a decrease in water pH?
• What action should be taken first when re-sampling after a failed micro test?
• Why is it crucial to flush dead-end lines in a distribution system?
• Where should a chlorine exhaust fan be located?
• Which of the following is NOT a physical factor influencing corrosion?
• What does alkalinity measure in water?
• What is the point from which metal is lost in an electrochemical reaction?
• What is the MCL for Nitrite in drinking water?
• What is the maximum draw-off rate of a 1-ton chlorine container?
• Which of the following is NOT a waterborne illness of concern?
• What are the three types of disinfection methods mentioned in drinking water treatment?
• If you failed a micro test, what is one of the requirements for resampling?
• What are the upper and lower limits for safe oxygen levels in confined spaces?
• A transient non-community water system is defined as one that does what?
• How many service connections upstream must be resampled if a micro test fails?
• How does liquid chlorine affect the pH of water?
• What is the purpose of a dielectric union in piping systems?
• Which of the following is NOT a basic type of water rights?
• What needs to happen for an electrochemical reaction to occur?
• What defines prescriptive water rights?
• What is a common cause of failure in a coliform test for effluent water?
• What is the MCL for Total Trihalomethanes?
• Which of the following is NOT a type of pathogen?
• What is one outcome of corrosive water in distribution systems?
• What describes an anode in a water system?
• What does the C-Factor's numerical value represent?
• Why is it important to document the exercising of all system valves in water distribution systems?
• Which option describes a key characteristic of Galvanic corrosion?
• What role does temperature play in corrosion within water systems?
• In which areas should you monitor for high total trihalomethanes (TTHM) levels?
• A disease-producing organism is commonly referred to as a?
• What is the primary purpose of coagulation and flocculation in water treatment?
• What is considered an acceptable water loss for a typical water system?
• What are the two types of hardness present if alkalinity is less than total hardness?
• What can be added to the lime softening process to effectively remove more hardness?
• What type of corrosion does a dielectric union stop?
• What does a negative Langelier Index value suggest about water?
• What can cause vibrations leading to breakage in pumps?
• Which of the following is a method to reduce Disinfection Byproducts in a distribution system?
• What causes lake "turnover" to occur?
• Which of the following is NOT a type of flow meter?
• What is the first step to take if there is leaking from around the packing gland?
• What does the bacteriological monitoring requirement aim to prevent in public water supplies?
• What is the minimum PSI required in a distribution system according to DEP?
• What is the setback requirement for wells located near septic tanks with a capacity of less than 2000 gpd?
• Which of the following is NOT a form of chlorine?
• What is a limitation of the lime softening process?
• What is the purpose of fusible plugs in chlorine cylinders?
• When chlorine leaks occur, what does ammonia vapor react with chlorine vapors to form?
• What type of solution does an electrolyte refer to in a galvanic cell context?
• Which entity requires that all public water systems provide chemical analysis results?
• What is a cathode in electrochemical cells?
• How many bacteriological samples must public water systems provide?
• What do organic compounds contain?
• What role do coagulants play in water treatment?
• Where should SCBA gear be stored for safety?
• What is a less effective alternative to chlorine as a disinfection method?
• What is a significant factor impacting chlorine dosing effectiveness?
• What are the two main components of a solution?
• What causes galvanic corrosion?
• What phenomenon occurs when particulate impurities in water settle after coagulation?
• Chlorine Dioxide can cause which of the following hazardous effects?
• Is it true that PPB and mg/L are interchangeable?
• What is a necessary consideration after using Ion Exchange for hardness removal?
• Which type of water system is defined as CWS?
• What does the joining of dissimilar metals in plumbing systems lead to?
• If a water sample's Alkalinity is greater than its Total Hardness, what type of hardness is present?
• What is Cl2 demand calculated as?
• What is one disadvantage of hard water when used in home appliances?
• Why should Calcium Hypochlorite not be stored near organic materials?
• What action can be taken to protect groundwater?
• What is the limit for Total Trihalomethanes (TTHM) in water?
• What is the first step to convert a fraction to a decimal?
• Which treatment method, surface or well water, poses a higher risk for organic material leading to TTHM formation?
• How is the chlorine dose calculated?
• When was the Safe Drinking Water Act enacted?
• What are the two types of chemical feed pumps used in water treatment?
• What characteristic is typical of bacteria as pathogens in water?
• What proactive maintenance method includes monitoring flow and pressure?
• What happens if the chlorine dosage exceeds the demand?
• What happens to pH when pure gas chlorine is added to water?
• Which issue arises from iron bacteria in piping systems?
• If icing is occurring on a chlorine cylinder, what should be done?
• What are riparian water rights primarily based on?
• What is the primary focus of the Safe Drinking Water Act?
• TTHMs are produced as a result of reactions between chlorine and what?
• Cavitation typically damages which component of a pump?
• What type of water condition can lead to algal blooms?
• What is the minimum setback distance for wells from septic tanks when the tank has a capacity greater than 2000 gpd?
• What defines a community water system?
• What describes a permanent connection that prevents corrosion in piping systems?
• What occurs when there is an air lock in plumbing?
• What is a downside to using chlorine for odor and taste removal?
• What is the process to convert a percent into a decimal?
• What term describes the solution that conducts the current in an electrochemical reaction?
• Which waterborne illness is a viral infection often spread through contaminated water?
• What is one issue caused by electrochemical corrosion?
• What is one of the potential issues with high pH when using lime softening?
• At what temperature do fusible plugs in chlorine cylinders melt?
• Colloidal solids in water typically carry which type of charge?
• What characterizes a non-transient non-community water system?
• What might be a visible indicator of corrosion in pipes?
• Why is Carbon Dioxide introduced into water after the softening process?
• How do you convert a decimal to a fraction?
• In terms of water rights, what does the term “appropriative” refer to?
• Which are the three main types of solids found in water?
• Coagulation in water treatment involves a reaction between the coagulant and what substance present in the water?
• What happens to flocs during flocculation?
• How low can hardness levels drop using Ion Exchange methods?
• What is a common symptom of fluoride poisoning when it is swallowed?
• Before starting a centrifugal pump, it is important to ensure that it is what?
• What is the collective term for the sum of the following compounds: Chloroform, Bromofrom, Bromodichloromethane, and Dibromochloromethane?
• What is the formula for calculating Cl2 residual?
• Why are viruses considered a type of pathogen?
• What is an example of predictive maintenance?
• What is the effect of not priming a centrifugal pump before start-up?
• Sulfate-reducing bacteria are known to emit an odor resembling what?
• What does the C-Factor indicate?
• What is the Maximum Contaminant Level (MCL) for Lead (Pb) in drinking water?
• Which of the following is a chemical method of disinfection?
• What is a non-community water system?
• What effect does recarbonation have on the pH of water?
• What is the MCL for combined Nitrate and Nitrite?
• What is the maximum draw-off rate of a 150-lb chlorine cylinder?
• What is one advantage of using UV lights for disinfection?
• Which is an ideal condition for TTHM formation?
• To increase the concentration of a solution, what should be added?
• What is the limit for Haloacetic Acids (HAA5s) in parts per billion according to the standards?
• What does a CT limit indicate in water treatment?
• What materials can potentially interfere with the stability of Chlorine gases such as Cl2?
• What is an example of a scenario that would lead to zero or negative pressure in a water system?
• How is corrosion defined?
• Which substance is most likely to require immediate boil water notice due to health concerns?
• During an electrochemical reaction, where does electric current flow back to through the electrolyte?
• High turbidity in water can harm disinfection because turbid particles do what?
• What is the recommended antidote for all acids?
• Which of the following factors does NOT affect disinfection byproduct formation?
• What is the main difference between MCLG and MCL?
• What is the Maximum Contaminant Level (MCL) for Copper (Cu) in drinking water?
• What are the four categories of contaminants in water?
• What primarily causes hardness in water?
• Which is the simplest form of corrosion control?
• Which type of water right allows for the legal use of water based on property location?
• What does coagulation refer to in water treatment?
• Which of the following would be considered reactive maintenance?
• Which requirement is NOT typically associated with water distribution systems serving more than 350 people?
• Which ions are primarily responsible for water hardness?
• What conditions make lakes and reservoirs susceptible to algal blooms?
• How many service connections downstream must be resampled if a micro test fails?
• What is required to lift a boil notice after a main break?
• When pure chlorine liquid is exposed to the atmosphere, it expands by how many times its volume?
• What is the primary reason for placing a chlorine exhaust fan at floor level?
• What occurs when a centrifugal pump is started without being primed?
• What does the Langelier Index help determine?
• Besides disinfection, what is a primary use of chlorine in a water treatment plant?
• What is one cause that would require a Public Boil Water Notice?
• How should you convert a percent into a fraction?