Ohio Sanitarian Practice Exam

These questions are part of the practice quiz. Start practicing

• What is the term for the process whereby water that has fallen on land finds its way back to the oceans?
• Where do most cases of groundwater pollution occur?
• Which element in water treatment plant effluent indicates filtration efficiency?
• It has been estimated that waterborne diseases worldwide account for how many illnesses per year?
• Which type of wells are NOT covered by the amendments to the Safe Drinking Water Act?
• What is desalination?
• Which of the following levels of turbidity can be considered safe for drinking water?
• Where is the majority of fresh water found?
• What type of microorganism causes Infectious Hepatitis A (HAV)?
• Lakes characterized as clean, high in dissolved oxygen (DO), deep, and receiving few nutrients are called what?
• Which activity utilizes the greatest proportion of water globally?
• Which factor increases the chance of pollution travel?
• What does not constitute a treatment method for controlling organic chemicals?
• Against which contaminants is ozone effective?
• What characterizes water conservation practices in homes?
• What factors influence the proper disinfection of water using chlorine?
• What term describes the measure of the amount of water held by a rock or soil in pores or voids, expressed as a percentage of total volume?
• Who is responsible for the regulation of drinking water additives?
• Which of the following is included in a sanitary survey of groundwater supplies?
• What process is used to remove practically all tastes and odors from water when sufficient amounts of activated carbon are applied?
• What is indicated by a positive completed test in bacteriological water analysis?
• Which test confirms the presence of chlorine or bromine in water?
• Which of the following statements regarding surface and groundwater is true?
• Hydrogen sulfide can be fatal at which exposure level?
• What is a common cause of disease due to cross-connections?
• Which type of chemical is used primarily for short-term disinfection of drinking water?
• What is the result of inadequate aeration in a water treatment system?
• Which organism is most resistant to unfavorable environmental conditions and indicates past or possibly intermittent pollution?
• What factor will ultimately result in chronic water shortages?
• In domestic water well supplies, which two elements are primarily responsible for hardness?
• Which aspect of water is significantly improved through the use of sand filters?
• Methylene Blue Active Substance (MBAS) is a test to identify what?
• What is the major problem associated with the desalinization of water?
• Which of the following is not included in the nine contaminant groups?
• The safe distance between a well and a waste disposal system is dependent on:
• Why is aluminum monitored in water treatment processes?
• What level of chlorine concentration in a drinking water supply could be considered excessive?
• What defines the stability of drinking water quality?
• What is the most critical risk factor associated with backflow in water systems?
• The hydro pneumatic tank typically contains what percentage of its volume as water?
• Which type of filtration system is specifically designed to remove larger particles from water?
• For emergency disinfection of small volumes of water, which liquid form of chlorine is typically used?
• What does water containing nitrates generally indicate?
• What type of contamination can occur if a plumbing device allows unwanted flow?
• The DPD test is commonly used for the determination of which substance?
• Which of the following would not be classified as a sedimentary formation?
• Objectionable tastes and odors in public water supplies are mostly due to which factor?
• Hydro pneumatic or pressure-tank water systems are suitable for:
• Rocks such as serpentine, slate, soapstone, and marble belong to which class of rocks?
• Leachate from a garbage dump has been found to pollute wells at distances of how far?
• Which organism is not known as an iron bacterium?
• How are the sources of water supply classified?
• Which of the following would not be used as a coagulant?
• Which of the following is not considered a satisfactory solution to chemical contamination in well systems?
• What term is used to describe masonry reservoirs commonly found in rural water supplies?
• What term describes microscopic photosynthetic plants that cause taste and odor issues in water?
• What does a high JTU in a body of water indicate?
• Which type of filter is recommended for small communities and rural areas?
• Why is it advisable to have a faucet situated well above the rim of a sink?
• What hazard is primarily associated with back-siphonage?
• The quiescent settling of water without the aid of chemicals is known as?
• What is the primary role of colliform bacteria in water quality testing?
• Which is not a variable to consider when deciding on a safe distance between a well and a sewage disposal system?
• The type of water that makes it difficult to produce suds or to rinse laundry, dishes or food equipment is?
• Historically, the need to control which disease prompted the establishment of adequate water treatment in the US?
• What is one of the best things that could be done to improve the health and living standards among Third World populations?
• Which soil type has the greatest percentage of porosity?
• What is the desirable level of alkalinity in water?
• Which is not a measure for water turbidity?
• The Langelier index is used to determine which Aspect of water?
• What are examples of groundwater systems?
• Which of the following would be classified as a non-transient, non-community water system (NTNCWS)?
• What does drinking water standards specify for safe water regarding testing results?
• The final product in the biochemical oxidation of ammonia yields which compound?
• What is the pH of a solution with an apparent hydrogen ion concentration of 1 x 10-8 moles per liter?
• What is the most practical method for removing nitrates from water?
• Granular activated carbon (GAC) filters are primarily used to:
• Which chemical agent used for water disinfection is known for not providing a residual effect?
• What does porosity measure in relation to rocks and soil?
• What is the main purpose of using a coagulant in water treatment?
• What does a high Methylene Blue Active Substance (MBAS) level indicate?
• Why is a water sample for bacteriological analysis packed in ice if it cannot be analyzed immediately?
• Which solution is viewed as critical to addressing water scarcity in urban areas?
• Which unit measures the amount of light scattered by particles in a water test sample?
• What is the primary source of waterborne diseases?
• A hydraulic ram elevates water using which source of power?
• Hardness in drinking water is considered desirable at levels of what range?
• Which of the following communicable diseases is transmitted through the fecal/oral or vehicle-borne route?
• Which parameter is important in assessing the safety of a water supply?
• If water in a stream is at 20 degrees C with nine mg of oxygen per liter, what could it indicate?
• Which statement is most correct regarding facultative bacteria?
• Which method of water treatment involves the addition of sodium ion?
• What factors are fundamental to controlling inorganic chemicals in drinking water?
• What water constituent has been associated with staining plumbing and clothing dark brown or black?
• Aeration in water treatment is particularly beneficial for which of the following substances?
• What is the primary purpose of a water treatment process?
• Which method is the most reliable to determine the safety of a drinking water supply?
• Trihalomethanes are primarily created during which process?
• Which method is commonly used to remove chlorine from drinking water?
• Which conditions indicate organic stream pollution?
• What is the first product of organic matter decomposition that indicates "fresh pollution"?
• How many gallons of sewage do residential cesspool and septic tank soil absorption systems discharge into the ground each year?
• Which soil condition is most favorable for the removal of viruses?
• What is a common consequence of excessive water hardness?
• What is a primary concern when it comes to nitrates in drinking water for infants?
• All of the following will generally vary directly with the quantity of water used for domestic purposes except?
• What is a likely effect of fecal contamination in drinking water?
• What is the correct procedure for collecting a tap water sample for bacteriological analysis?
• Which bacterial group indicates fecal contamination or sewage pollution?
• Microbial pollution travels only a short distance through which type of soil?
• For testing residual chlorine, which method determines free available chlorine with minimal interference?
• Why is measuring oxygen levels in water essential for aquatic life?
• What does the presence of ammonia in water typically indicate?
• What is a potential health risk associated with high concentrations of nitrates in drinking water?
• What is a common indicator of unsanitary drinking water?
• An example of a surface water supply would be?
• Which gases frequently found in water encourage corrosion?
• Typically, an abundant supply of groundwater may be yielded from which type of rocks?
• Which of the following compounds would not contribute to water hardness?
• The presence of which of the following is most easily identified by laboratory analysis in water contaminated by feces?
• Groundwater in the soil travels up through a plant's root system and then comes out from the leaf structure as?
• Which organisms are most resistant to unfavorable environmental conditions and indicate past or possible intermittent pollution?
• What is one of the most common reasons for the contamination of wells drilled through rock?
• Diatomaceous earth filters should be augmented by which of the following?
• Which method can often remove over 90% of sodium arsenate?
• If three consecutive water samples from one supply all show the presence of E.coli, what does this indicate?
• In the context of drinking water safety, what does back-siphonage refer to?
• What is considered presumptive evidence of the presence of coliform in the MPN test?
• Which factor is most likely to increase the risk of harmful algal blooms?
• Which method is typically used for the disinfection of wastewater before it is released into the environment?
• What is a common consequence of algal blooms in freshwater lakes?
• What is the result of severe turbidity in drinking water?
• What is the primary source of drinking water for over 95% of all farm families?
• Groundwater contamination potential is least likely in which geological formation?
• Which diseases may arise from improperly located wells that allow for fecal contamination?
• What is the best method of backflow control?
• Viral hepatitis B (HBV) is most often associated with which of the following?
• The presence of bacteria responsible for typhoid fever in a public water supply could be traced to which source?
• In which subsurface formation is groundwater contamination likely to travel the farthest?
• What can be a serious consequence of over-pumping groundwater?
• Which process helps in removing gases dissolved in water during treatment?
• Which type of well is considered the most dependable source of water and is less likely to become contaminated?
• Which term describes the process of pollutants entering the groundwater?
• What is the most effective method to reduce the level of fluorides in drinking water?
• Which statement concerning ozone is incorrect?
• Which factor most affects the disinfecting ability of chlorine?
• What does xeriscape landscaping involve?
• Nephelometric Turbidity Units (NTU) are most commonly used to:
• What is the desirable retention time when using presettling reservoirs to eliminate heavy turbidity or pollution before treatment?
• The type of filter that is recommended for use at small communities and rural places is the?
• What is a common indicator of fecal contamination in water?
• When using surface waters for drinking water supplies, what is a general rule regarding their treatment?
• Which of the following is NOT a characteristic of groundwater?
• Which chemical is the most widely used to destroy microorganisms?
• Which of the following is not a commonly accepted method to prevent back-siphonage?
• Where is saltwater intrusion into depleted aquifers becoming a problem in the United States?
• What has the greatest potential for reducing the demand for water?
• What type of pesticide poses a risk due to its persistence in the environment?
• Which residual test for chlorine would be least desirable?
• What is the purpose of a forward sweeping motion when collecting water samples from a stream or lake?
• What does a physical cross-connection allow?
• Which factor is crucial in properly maintaining well casings to prevent contamination?
• According to the Safe Drinking Water Act, what is the minimum number of water supply sources determined by?
• What powers a hydraulic ram used for elevating water?
• What is another name for Epsom salts?
• The effectiveness of sedimentation in water treatment primarily depends on which factor?
• What is the primary use of activated carbon in water treatment?
• What does aeration in water treatment aim to increase?
• What is the primary organism identified in the fecal coliform test?
• Which of the following is a benefit of water-saving irrigation technology?
• Which compound would NOT contribute to water hardness?
• According to estimates, how much water would installation of water saving plumbing devices in homes save per day for a 2-3 person household?
• Which option represents a simple way to conserve water within most households?
• What increases when hard water is softened using the ion exchange method?
• What effect does turbidity have on water?
• What is the primary purpose of a septic tank in residential systems?
• What is the main function of a sand filter in water treatment?
• What type of bacteria is commonly tested for as an indicator of fecal contamination in drinking water?
• If an MCL is exceeded, what must a Non-Transient Non-Community Water System (NTNCWS) do?
• Which testing parameter is crucial for evaluating water quality related to particulate matter?
• What is a common reason for well contamination in areas with rock, clay, or hardpan?
• Which of the following is not commonly used for disinfection of water?
• What conditions would result in the worst case of pipe damage?
• What causes water hardness?
• Which of the following statements is true concerning the presence of coliform organisms in drinking water?
• How much water does a person need daily to maintain bodily functions?
• Which of the following disinfecting compounds can be used full strength for disinfections?
• Which soil condition is most favorable for the removal of viruses?
• Which contaminant in water is associated with methemoglobinemia?
• The flushometer valve is typically protected by which device?
• The quality of surface water depends on:
• Which method is essential for identifying sources of water pollution?
• What characteristic of fine loamy sand allows for effective virus removal from water?
• What is the role of coagulation in water treatment?
• What chemical is used to dechlorinate bacteriological samples?
• Which of the following is not a practical method for removal of cadmium?
• Algae development will cause which of the following?
• What is the term for the manner in which water moves from place to place, changing forms?
• Which of the following is NOT a characteristic of eutrophic lakes?
• Which substance is commonly used as a coagulant in water treatment?
• Backflow of nonpotable materials into the potable water system may occur through which methods?
• Which of the following is NOT a form of alkalinity?
• Which method is used to control the growth of algae and protozoa in water?
• In emergencies, which method is effective for disinfecting small quantities of water?
• Which of the following is not commonly used to disinfect water?
• Which gas is responsible for the distinct "rotten egg" odor in many water sources?
• What is the first step in evaluating the safety of a potential water system?
• What is the effect of high levels of MN in water?
• In terms of water quality, what does a high concentration of carbon dioxide in water signify?
• Which of the following is an important factor in designing a safe public water supply?
• What generally causes degradation of groundwater supplied by human-generated pollutants?
• Microbial pollution travels a short distance through which of the following?
• The presence of coliform in water serves as an indicator of what?
• What does the Maximum Contaminant Level (MCL) represent?
• The presence of which organism in water suggests past or intermittent pollution?
• What is a key sign that water may not be safe to drink?
• What is the primary reason for the decline in the water table in some groundwater dependent areas of the world?
• In a test conducted in North Carolina, sewage organisms traveled more than how many feet in sandy soil?
• Which of the following is a major regulatory requirement included in the Safe Drinking Water Act?
• Back-siphonage may be prevented by all of the following methods except?
• At what exposure level can hydrogen sulfide be fatal?
• Which of the following can cause taste and odor problems in water supplies?
• What is the majority of the world's water used for?
• A well casing is required to be installed with what material used as grout?
• In water treatment, what is the effect of using activated carbon?
• Why is a sanitary survey of a water system necessary?
• Which gases are frequently found in water that encourage corrosion?
• What is necessary for the control of infectious, intestinal diseases in humans?
• Which of the following is used to properly seal a drilled well to prevent contamination of the water supply?
• What is the first step in controlling organic chemicals in drinking water?
• What role does pH play in water disinfection effectiveness?