REHS EXAM 2024 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY, Exams of Nursing

Download REHS EXAM 2024 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY and more Exams Nursing in PDF only on Docsity! 1 | P a g e REHS EXAM 2024 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|NEWEST|GUARANTEED PASS |LATEST UPDATE Which of the following are examples of short-range primary pollutants? a. total suspended solids and sulfur dioxide b. sulfur dioxide and ozone c. ozone and acid rain d. total suspended solids and acid rain total suspended solids and sulfur dioxide Which of the following inversions develops at night under conditions of relatively clear skies and very light winds? a. subsidence inversion b. frontal inversion c. radiational inversion d. stack emission inversion radiational inversion The information needed to use an air quality model includes 2 | P a g e a. pollutant concentration data, population, and meterological data b. population, source emission data, and pollutant concentration data c. meteorological data, pollutant concentration data, and source emissions data d. stack size, population, and pollutant concentration data meteorological data, pollutant concentration data, and source emissions data The pitch of a sound is determined primarily by a. frequency b. wavelengths c. sound pressure d. all of the above frequency When absorbed daytime heat is radiated quickly into space and the temperature of surface air drops below the air above it, the condition is referred to as a. radiant energy b. subsidence inversion c. radiation inversion d. thermal radiation radiation inversion The major source of sulfur dioxide is a. natural erosion of soils b. fuel combustion c. industrial processing d. road traffic fuel combustion Which of the following is generally found at the highest concentrations in urban atmospheres? a. sulfur dioxide b. nitrogen oxide c. ozone d. carbon monoxide carbon monoxide One of the main precursors of acid rain is a. nitrogen oxide b. carbon dioxide 5 | P a g e c. Q fever d. tetanus encephalitis The one of the following diseases which rats don't act as intermediate hosts is a. amoebic dysentery b. endemic typhus c. plague d. Weil's disease amoebic dysentery The variety of rat most common in the US in urban environments is a. black rat b. brown rat c. roof rat d. white rat brown rat Eradication of mosquitoes and ticks would have no effect on epidemic of a. equine encephalitis b. infectious hepatitis c. yellow fever d. rocky mountain spotted fever infectious hepatitis A rodenticide which is also an emetic is a. strychnine b. red squill c. warfarin d. arsenic red squill Lasso is the trademark for a. acrolein b. atrazine c. alachlor d. duiron alachlor 6 | P a g e Which disease is the result of a tick bite a. murine typhus b. scabies c. Q fever d. all of the above Q fever Chaga's disease is also known as a. brucellosis b. trypanosomiasis c. undulant fever d. dengue fever trypanosomiasis Sylvatic plague a. is the name given to an infection in wild rodents of pasturella pestis b.is a serious disease of man originally described by sylvania c. was so called because of a curse on the Gausi by Sylvaticus d. was a serious occupational disease of silversmiths during the 16th century is the name given to an infection in wild rodents of pasturella pestis Which of the following is not insect-borne a. diptheria b. encephalitis d. bubonic plague d. tularemia diptheria Endemic typhus is spread through the a. roach b. mosquito c. tick d. flea flea Which of the following is unlike the rest regarding epidemiology? a. malaria b. rocky mountain spotted fever 7 | P a g e c. rabies d. eastern encephalitis rabies Which of the following diseases is not related to rodents in its transmission to man a. salmonellosis b. leptospirosis c. yellow fever d. rickettsial pox yellow fever Which of the following is not related to echinococcosis a. dogs b. cats c. sheep d. tapeworm cats The infection reservoir for anthropod-borne viral encephalitis is generally accepted to be a. horses b. humans c. birds d. fish birds The amelioration of a disease to reduce disability or dependence resulting from it is called a. first degree prevention b. second degree prevention c. tertiary prevention d. none of the above tertiary prevention Which is not a primary source for giardia lamblia cysts? a. beavers b. humans c. roaches d. muskrats roaches 10 | P a g e c. filtration d. flocculation concentration or dose of microorganisms The ability of a soil to absorb and allow water and air to pass through is related to all of the following except a.chemical composition b. texture c. cation exchange capacity d. granular structure cation exchange capacity The NODAK system is designed to a. protect groundwater b. decrease surface area c. all evaporation of most liquids d. none of the above protect groundwater What two factors determine the groundwater contamination potential from a septic tank? a. size of tank and depth of groundwater b. contaminants in tank and soil characteristics c. permeability of septic tank materials and soil characteristics d. soil characteristics and depth to groundwater soil characteristics and depth to groundwater Detention time for septic tanks should be not less than a. 8 hours b. 12 hours c. 24 hours d. 36 hours 24 hours Which of the following is not a factor in the satisfactory operation of a septic tank/sand filter system? a. rate of sewage application b. effectiveness of sand c. ratio of septic tank size to sand filter size d. uniformity coefficient sand 11 | P a g e ratio of septic tank size to sand filter size What is considered to be the best single strength measure of wastewater polluted water containing degradable waste? a. DO b. 5 day BOD c. COD d. total coliform 5 day BOD What is the permissible hour threshold limit value for H2S? a. 10 ppm b. 20 ppm c. 30 ppm d. 40 ppm 20 ppm The 5 day BOD test should be performed when a. measuring the concentration of suspended solids in wastewater b. determining the bacteriological quality of drinking water c. conducting a series of tests to determine the degree of water pollution d. requiring more rapid results than can be obtained by using the COD test conducting a series of tests to determine the degree of water pollution The roentgen is a measure of ionization in air produced by exposure to a. x-rays or gamma rays b. alpha particles c. beta particles d. all of the above x-rays or gamma rays Lasers emit a. mechanical radiation b. ionizing radiation c. electromagnetic radiation d. none of the above electromagnetic radiation 12 | P a g e Microwave ovens use which of the following energy sources? a. mechanical b. electromagnetic c. ultraviolet d. radio waves electromagnetic In practice, exposure to ionizing radiation is controlled by the use of shields of lead a. true b. false false Biological effects should govern the required standards of radiological protection a. true b. false false The discoverey of the "x-rays" was a. Crookes b. Curie c. Roentgen d. Becquerel Roentgen Residents of which of the following cities would probably recieve the most cosmic radiation? a. Lake Placid b. Miami c. Los Angeles d. New York Lake Placid Which of the following is most penetrating a. alpha rays b. beta rays c. gamma rays d. x-rays gamma rays 15 | P a g e c. lung cancer d. malignant melanoma lung cancer Considered by many as the source of greatest public exposure related to nuclear power production is a. power plant emissions b. leakage from power plants c. uranium mill tailing d. radon gas emissions uranium mill tailing A major problem associated with the milling of uranium ore is the a. production of radioactive tailings b. contamination of those who do the milling c. tracking of radioactive particles to other areas by workers d. disposal of the waste products production of radioactive tailings Under normal operating conditions, public exposure to ionizing radiation from nuclear power plants is primarily from a. release of water used to cool the plants b. deliberate release of radioactive gas c. removal of waste products from the plant d. leakage from the natural process of radioactive decay deliberate release of radioactive gas The major controversy associated with injury as a result of microwave exposure deal with a. leukemia b. high levels of microwave absorption c. prolonged low levels of exposure d. development cataracts prolonged low levels of exposure Which one of the following is probably least susceptible to microwave induced injury a. eyes b. urinary bladder c. gastrointestinal tract d. liver 16 | P a g e liver Absorption of microwave energy by bodily tissues is largely associated with the a. frequency of microwaves b. distance of the tissue from the source of the microwaves c. amount of water content of the tissue d. basic source of the microwave emission amount of water content of the tissue Probably the best understood type of microwave induced injury involves a. the skin b. excessive heating of internal organs c. the liver d. squamous cell destruction excessive heating of internal organs It is generally accepted that the most widespread chemical contaminant known is a. dioxin b. mercury c. PAN (polychlorinated biphenyls) d. lead PAN (polychlorinated biphenyls) The primary route of entry of PCBs into humans is a. absorption b. inhalation c. inoculation d. ingestion ingestion Which one of the following conditions is not a specifically identified health damaging effect of lead in the human body a. sterility b. heart attack c. miscarriage d. liver damage heart attack 17 | P a g e The tissues most often damaged as a result of inorganic mercury entering the body include all of the following except a. brain b. heart c. kidney d. liver heart The most common occupational exposure to mercury is through a. inhalation b. absorption c. ingestion d. inoculation inhalation The most common source of exposure to cadmium is through a. inhalation b. absorption c. ingestion d. inoculation ingestion Which of the following is (are) true about composting a. it has been a great success in the US b. it may come from municipal solid waste c. it results in poor fertilizer d. both b and c both b and c Which of the following composting methods will require limited land space? a. beccari method b. bangalore process c. fairfield process d. none of the above none of the above ______ is the thermochemical process for the conversion of complete organic solids in the absence of added oxygen, to water, combustible gases, tarry liquids, and stable residue 20 | P a g e Compactibility of soil in land fills depends primarily on a. the point at which refuse is discharged on the fill b. the type of refuse to be compacted c. the moisture content of the soil d. the gradient of the particle size of the soil the gradient of the particle size of the soil On the basis of weight, which of the following materials constitutes the largest component of domestic solid waste a. metal b. paper c. plastics d. glass paper Refuse in an established sanitary landfill decomposes by the bacterial process of a. aerobic decomposition b. psychrophilic decomposition c. thermophilic decomposition d. anaerobic decomposition anaerobic decomposition The two most common methods of sanitary landfill operation are a. composting and recycling b. open dump and burning c. area method and trench method d. wet area and dry area area method and trench method Which of the following is not a type of hazardous waste incinerators a. pressurized b. fluidized c. fixed hearth d. rotary kiln pressurized Which federal law regulates underground storage tanks for hazardous substances? a. Clean Water Act 21 | P a g e b. Federal Water Pollution Control Act c. Resource Conservation and Recovery Act d. Solid Waste Disposal Act solid waste disposal act A measure of the probability and severity of adverse effects under specific conditions best describes a. risk b. hazard c. exposure d. toxicity risk Which of the following sampling devices is best for collecting undisturbed soil samples? a. aurgur b. shelby tube c. split spoon d. veihmeyer rod split spoon The greatest number of casualties as the result of air pollution occurred in a. Meuse River Valley, Belgium b. London, England c. Los Angeles, Ca d. Donora, PA Meuse River Valley, Belgium The first major recorded episode of air pollution that produced human casualties occurred in a. Meuse River Valley, Belgium b. London, England c. Los Angeles, Ca d. Donora, PA Donora, PA Pollutants in the ambient air most associated with heightened risk of death and diseases are a. particulate b. sulfur dioxides c. nitrogen oxides d. ozone 22 | P a g e particulate Inhalation of which of the following may result in chronic airway resistance? a. carbon monoxide b. carbon dioxide c. nitrogen dioxide d. sulfur dioxide sulfur dioxide Regulations regarding automobile emission standards began with automobiles manufactured in a. 1958 b. 1963 c. 1968 d. 1973 1968 The majority of sulfur dioxide originates from a. automobile exhaust b. coal and oil burning power plants c. industrial smelters d. volcanic eruptions coal and oil burning power plants The majority of nitrogen dioxide originates from a. motor vehicles b. volcanic eruptions c. home waste incineration d. burning of industrial wastes motor vehicles Shock loading refers to a. huge influx of fish to a breeding ground b. large scale reproductive failure of fish in an area c. several month's accumulation of acid quickly melting into a spawning area d. the overabundance of frog tadpoles emerging in an area several month's accumulation of acid quickly melting into a spawning area Which one of the following metals is most fatal to fish when it becomes dissolved in acid waters? 25 | P a g e a. chlorine b. calcium chloride c. sodium bicarbonate d. copper sulfate sodium bicarbonate Which raises the pH of pool water? a. chlorine b. alum c. sodium carbonate d. all of the above sodium carbonate To disinfect clear water using 5% household bleach a. mix 6 to 8 drops of bleach and drink after setting 5 minutes b. mix 6 to 8 drop and let stand for 10 minutes c. mix 1 tablespoon to 10 gallons and let sit 30 minutes d. drink canned or bottled food and beverage materials even thought they were contaminated mix 1 tablespoon to 10 gallons and let sit 30 minutes Hepatitis B vaccinations for employees that work in contamination risk job areas a. must be offered at no cost b. must be made available to the employees at the employers cost c. are required of such employees d. are not required due to the non-serious nature of the disease and its difficulty of spread or employee contraction must be offered at no cost Most concerns about noise as a pollutant have focused on the a. home b. school c. community d. worksite worksite Which one of the following sources of noise has been declining in recent years? a. motorcycle b. automobile 26 | P a g e c. aircraft d. industrial automobile All of the following are characteristics of an ideal shielding material for lead paint surfaces except a. vermin proof b. low cost c. high density and mass d. non toxic high density and mass The high moisture content of vent gases create a. acids which eat away the mortar in the chimney b. C2H2O c. possible explosion hazard due to combustible gas acids which eat away the mortar in the chimney The four biosafety containment levels consist of a combination of a. lab practices, safety equipment, and facilities b. lab techniques, research protocols, and safety equipment c. research protocols, safety training, lab facilities d. lab practices, safety training, and research protocols lab practices, safety equipment, and facilities Perhaps the most important feature in implementing programs in biosafety is a. the extensive use of rules and regulations b. the reliance on outside contractors c. working with the client in a consultative mode d. none of the above working with the client in a consultative mode _________ is the doing of an authorized act in an unauthorized manner a. nonfeasance b. misfeasance c. malfeasance d. feasance misfeasance 27 | P a g e The legal authority to conduct a routine environmental health inspection a. explicitly stated in the US constitution b. inherent in a health agency c. granted by judicial decree d. delegated by legislature delegated by legislature If a health official failed to close a restaurant known to have imminent health dangers this is a. misdemeanor b. malfeasance c. misfeasance d. nonfeasance nonfeasance Major effects on humans are caused by Los Angeles and London type smog, along with a. sulfur dioxide and hydrogen fluoride b. sulfur dioxide and carbon monoxide c. hydrogen sulfide and peroxacyl nitrates d. ozone and nitrogen sulfur dioxide and hydrogen fluoride Which component of clean dry air has the smallest volume? a. carbon monoxide b. nitrogen dioxide c. ammonia d. sulfur dioxide sulfur dioxide A primary pollutant is a. one that is formed in the atmosphere as a result of reactions such as hydrolysis, oxidation, and photochemistry b. one that is found in the atmosphere due to natural reactions c. one that is found in the atmosphere in the same form as it exists d. none of the above one that is found in the atmosphere due to natural reactions Which of the following are examples of short range primary pollutants? a. total suspended solids and sulfur dioxide 30 | P a g e c. Clean Air Act d. Pollution Control Act Clean Air Act The legal precedents that form that basis of US air quality control regulations currently in effect began with the: a. Air Quality Act of 1967 b. Clean Air Act Amendments of 1970 c. Clean Air Act of 1963 d. Air Quality Standards Act of 1967 Clean Air Act Amendments of 1970 Standards designed to promote human welfare by protecting agricultural crops, livestock, property, and the environment in general are called a. primary standards b. secondary standards c. tertiary standards d. remedial standards secondary standards The sensitivity of an ecosystem to acid precipitation is largely determined by the area's a. forestation level b. buffering capacity c. number of lakes d. topography buffering capacity Which one of the following is the most common "technological fix" for reduction of sulfur dioxide emissions? a. coal washing b. fluidized bed combustion c. integrated gasification d. stack gas scrubbers stack gas scrubbers The region of the atmosphere where virtually all life activities occur is the a. troposphere b. stratosphere 31 | P a g e c. mesosphere d. tropopause troposphere The region of the atmosphere where the temperature slowly rises with increases in altitude is the a. troposphere b. stratosphere c. mesosphere d. tropopause stratosphere Most ultraviolet radiation in sunlight is absorbed by the ozone layer as it passes through the a. troposphere b. stratosphere c. mesosphere d. tropopause stratosphere The reason that there are differences in the amount of infrared absorption in various climatic regions is because a. the amount of water vapor varies b. the carbon dioxide content varies c. the ozone layer differs in thickness d. the cloud cover varies the amount of water vapor varies The Green House effect is the result of a. the bombardment of the earth by ultraviolet rays b. the absorption of UVA by the ozone layer c. the diffusion of the UVB by the tropopause d. re-radiation of infrared waves back to the earth's surface re-radiation of infrared waves back to the earth's surface Which one of the following is not one of the major atmospheric gases? a. oxygen b. ozone c. argon d. nitrogen 32 | P a g e ozone The increase in the concentration of carbon dioxide in the earth's atmosphere might be occurring because of a. the increase is UV light reaching the earth's surface b. the decrease in the ozone layer of the earth c. the increased consumption of fossil fuels d. the decrease in the water vapor content of the atmosphere the increased consumption of fossil fuels Perhaps one of the greatest environmental issues of the late 20th century will be a. depletion of the ozone layer b. the Greenhouse Effect c. increased use of chlorofluorocarbons d. increased amount of oxygen in the atmosphere the greenhouse effect Nearly 1/4 of all global carbon dioxide emissions are the result of a. automobile emissions b. decreased use of lead based aviation fuels c. deforestation d. increased world wide industrialization deforestation Concern over increased carbon dioxide levels in the atmosphere revolve around issues of a. human health b. air pollution c. plant destruction d. global temperature global temperature Which of following is potentially the most important in terms of global warming? a. carbon dioxide b. nitrous oxide c. methane d. chlorofluorocarbons methane 35 | P a g e more understanding of ocean dynamics is needed The relationship between the photosynthetic rate of green plants and the carbon dioxide content of the atmosphere may aptly be termed a. carbon dioxide fertilization b. plant/atmosphere ratio c. oxygen deprivation ratio d. photosynthetic ratio carbon dioxide fertilization Which of the following gasses was not scheduled for phase out by 1996 as a result of the Montreal Protocol? a. chlorofluorocarbon b. halon c. methyl chloroform d. carbon tetrachloride halon Which one of the following gasses seems to present the greatest challenge in terms of elimination of its use? a. halon b. Freon c. argon d. hydrobromofluorocarabon Freon The ban of chlorofluorocarbons was not targeted at those companies that a. use the gas b. produce the gas c. export the gas d. import the gas use the gas Storage of clothing, bedding, and any other lice infested items for atleast ______ will cause the lice to die of starvation a. 10 days b. 3 days c. 6 months d. 30 days 36 | P a g e 30 days The smallest diameter hole through which an average house mouse can pass is a. 1/4 inch b. 1/2 inch c. 3/4 inch d. 1 inch 1/2 inch The one of the following diseases which is caused by a virus a. encephalitis b. malaria c. Q fever d. tetanus encephalitis The one of the following diseases which rats don't act as the intermediate hosts is a. amoebic dysentery b. endemic typhus c. plague d. Weil's disease amoebic dysentery The one of the following which is ordinarily not used as a fumigant a. ethylene oxide b. hydrogen cyanide c. methyl bromide d. phosphorous pentoxide phosphorous pentoxide The one of the following that is not ordinarily transmitted by an insect is a. malaria b. tetanus c. typhus fever d. yellow fever tetanus The variety of rat most commin in the US in urban environment is 37 | P a g e a. black rat b. brown rat c. roof rat d. white rat brown rat A rodenticide which is also an emetic is a. strychnine b. red squill c. warfarin d. arsenic red squill Most pesticide deaths in children and adults in the US are due to a. inhalation b. ingestion c. absorption d. injection inhalation The most common route of pesticide entry into the body is a. inhalation b. ingestion c. absorption d. injection ingestion All are anti-coagulant type rodenticides except a. PMP b. surflan c. warfarin d. fumarin surflan Endemic typhus is spread by the a. roach b. mosquito c. tick d. flea 40 | P a g e c. sometimes used where soil is unsuitable d. required for treatment in areas of high risk sometimes used where soil is unsuitable Man-made organic compounds that degrade very slowly are referred to as a. total organic compounds b. fractory compounds c. refractory organics d. anaerobic organic compounds refractory organics The typical limitation of use of the septic tank absorption field system is due to a. cost b. land use considerations c. soil type and size requirements d. appearance soil type and size requirements The recommended backfill over the absorption field is 12 inches a. true b. false true The recommended maximum length of the system material is 75 feet a. true b. false true What step listed below must be done in order to obtain reproducible results in the soil per test? a. totally saturated soil before beginning test b. test must extend at least 2 feet below frost line c. test hole must be greater than 3 feet above seasonal high water table groundwater, rock, or tight soil d. all of the above totally saturated soil before beginning test Detention time for septic tanks should not be less than a. 8 hours b. 12 hours 41 | P a g e c. 24 hours d. 36 hours 24 hours How often should residential septic tanks be inspected? a. monthly b. annually c. bimonthly d. every 3-5 years annually Name the three zones of stream pollution in order of normal chain of events degradation decomposition recovery Another name for mature or balanced lake is ______ a. oligotrophic b. eutrophophic c. mesotrophic d. omegotrophic mesotrophic Of the following, the one classified as a compound is a. aluminum b. ammonia c. nitrogen d. sulfur ammonia The scientific name of a certain microorganism is clostridium perfringens. The second word of this name indicates a. class b. genus c. phylum d. species species The principal purpose of a trap used in connection with a plumbing fixture is to 42 | P a g e a. impede the flow of sewage through the fixture b. permit the circulation of clean air through the plumbing fixture c. prevent the entrance of sewer air and foul gases into the house through the fixture d. strain insoluble waste material from the liquid waste prevent the entrance of sewer air and foul gases into the house through the fixture The shorter the wavelength a. the higher the frequency and lower the energy b. the lower the frequency and energy c. the lower the frequency and higher the energy d. the higher the frequency and energy the higher the frequency and energy The only difference between gamma rays, x-rays, and visible light is a. their charge b. their particle size c. their frequency d. none of the above their frequency The siting of nuclear facilities is subject to extensive regulation and licensing by the a. federal health department b. national environmental protection agency c. nuclear regulatory commission d. consumer product safety commission nuclear regulatory commission In practice, exposure to ionizing radiation is controlled by the use of shields in lead a. true b. false false A radioactive isotope is an artificially created radioactive isotope of a chemical element that is normally not radioactive a. true b. false true 45 | P a g e malignant melanoma Exposure to even moderate amounts of ultraviolet radiation can be dangerous for individuals suffering from a. heart disease b. lupus erythematosus c. bladder cancer d. seizure disorders lupus erythematosus Which one of the following is false? a. microwaves cause increased molecule vibration b. microwave tissue damage is the result of heat c. microwaves are a form of ionizing radiation d. there is a linear relationship between microwave frequency and tissue penetration microwaves are a form of ionizing radiation Which of the following is probably least susceptible to microwave induced injury? a. eyes b. urinary bladder c. gastrointestinal tract d. liver liver Probably the best understood type of microwave induced injury involves a. the skin b. excessive heating of internal organs c. the liver d. squamous cell destruction excessive heating of internal organs Immune system interference has been demonstrated in all the following except a. humans b. rats c. mice d. hamsters mice 46 | P a g e Perhaps the most significant long term effect of dioxin exposure appears to be a. disruption of hormonal regulation of reproduction b. possibility of liver cancer c. teratogenic effects on unborn d. development of tissue affinity for other toxic substances disruption of hormonal regulation of reproduction Perhaps the number one cause of disease as a result of general environmental exposure is a. TCCP b. PCBs c. asbestos d. dioxin asbestos For which one of the following has no direct, causative link been conclusively established a. lung cancer b. asbestosis c. multiple myeloma d. gastrointestinal cancer gastrointestinal cancer When engaging in complete asbestos removal, the provisions of which one of the following must be strictly met? a. Hazardous Substances Act b. Right to Know Legislation c. Clean Air Act d. Asbestos Hazard Emergency Removal Act Clean Air Act The number one environmental health problem that affects America's children is a. exposure to asbestos b. lead poisoning c. exposure to environmental tobacco smoke d. possible exposure to nuclear wastes lead poisoning Perhaps the first occupational exposure to a toxic mineral was associated with a. mining 47 | P a g e b. silver processing c. felt hat manufacturing d. developing of habitats silver processing The major source of lead today is a. ingestion of lead tainted food b. ingestion of lead contaminated water c. inhalation of polluted air d. ingestion of lead based house paint ingestion of lead based house paint Which one of the following conditions is not a specifically identified health damaging effects of lead in the human body? a. sterility b. heart attack c. miscarriage d. liver damage heart attack The tissue most often damaged as a result of inorganic mercury entering the body include all of the following except a. brain b. heart c. kidney d. liver heart The most common occupational exposure to mercury is through a. inhalation b. absorption c. ingestion d. inoculation inhalation Which one of the following poses virtually no health threat in terms of inorganic mercury? a. inhalation b. absorption 50 | P a g e a. true b. false true House mice may carry the disease lymphocytic choriomeningitis a. true b. false true Which one of the following has not been shown to be associated with PCBs? a. liver cancer b. fertility c. abnormal cell multiplication d. low birth weight fertility A major worry associated with prolonged, low level PCB exposure is a. general tiredness b. loss of appetite c. liver cancer d. reproductive problems liver cancer Which of the following organisms are most resistant to unfavorable environmental conditions and indicate past of possibly intermittent pollution? a. fecal streptococci b. eschericha coli c. aerobacter aerogenes d. clostridium sporulates clostridium sporulates The presence of which of the following is most easily identified by laboratory analysis in water contaminated by feces? a. shigella dysenteriae b. coliform c. entamoeba histolytica d. salmonella typhosa coliform 51 | P a g e Which of the following disinfecting compounds can be used in full strength for disinfecting? a. perchloron b. calcium hypochlorite c. chlorinated lime d. sodium hypochlorite sodium hypochlorite This substance is the first product of the decomposition of organic matter. its presence in water usually indicates "fresh pollution" of sanitary significance. what is it? a. ammonia b. sugar c. carbon dioxide d. hydrogen sulfide ammonia The presence of which of the following elements in water treatment plant effluent is used as a measure of filtration efficiency? a. copper b. aluminum c. zinc d. lead aluminum Which of the following is not used to disinfect water? a. chlorine b. bromine c. fluorine d. iodine fluorine The presence of which of the following in water would indicate past of possibly intermittent pollution? a. streptococcus fecalis b. escherichia coli c. clostridium perfringens d. enterococci clostridium perfringens Often over 90% of sodium arsenate can be removed by 52 | P a g e a. filtration b. coagulation c. ion exchange d. all of the above coagulation Reduction of the level of fluorides in drinking water can be accomplished by a. coagulation b. lime softening c. ion exchange d. all of the above all of the above When collecting bacteriological samples that have been chlorinated, what chemical is used to chlorinate the water? a. sodium sulfate b. sodium thiosulfate c. sodium bisulfate d. sodium bisulfite sodium thiosulfate Methylene blue active substance (MBAS) is a test to identify a. hardness of water b. iron in water c. presence of detergents containing phosphates d. presence of coliform in bacteria presence of detergents containing phosphates Which organism is not known as an iron bacterium? a. crenothrix b. giardia lamblia c. ferric chloride d. leptothrix giardia lamblia The final product in biochemical oxidation of ammonia yields; a. nitride b. nitrite 55 | P a g e b. calcium carbonate c. water pH d. HOCL calcium carbonate The manner in which water moves from place to place, changing from one form to another is called the: a. evaporation cycle b. hydrologic cycle c. precipitation cycle d. evapotranspiration cycle hydrologic cycle Which of the following is not a characteristic of groundwater? a. most bacteria are absent b. evaporation is virtually non-existent c. it is less expensive to treat than surface water d. it is more expensive to access than surface water it is more expensive to access than surface water The amendments of the Safe Drinking Water Act do not cover: a. municipal wells b. county reservoirs c. private wells d. public water systems private wells Degradation of groundwater supplied by human-generated pollutants is generally the result of: a. failure to cover the water supply b. failure to adequately chlorinate the water c. faulty waste disposal practices d. allowing industry exceptions to safe water practices faulty waste disposal practices The primary reason for the decline in the water table in some groundwater dependent areas of the world is: a. over pumping b. lack of permeable aquifers c. high rate of evaporation d. low rates of precipitation 56 | P a g e over pumping Xeriscape landscaping means: a. using rock as the basis for yard landscapes b. eliminating the use of trees in yards for landscaping c. selecting plants that can thrive on natural precipitation d. using sand as the basis for all landscaping needs selecting plants that can thrive on natural precipitation Chemicals that have been used for pools disinfection include chlorine, chloro-iso-cyanurates, bromine and a. ammonia b. soda ash c. sodium thiosulfate d. iodine iodine The gutters or skimmers receive a minimum of ________ of the total pool water due to the large quantity of organisms and materials which typically float. a. 95% b. 45% c. 60% d. 30% 60% To raise the pH, add a. chlorine b. muriatic acid c. soda ash (sodium carbonate) d. sulfuric acid soda ash (sodium carbonate) A chemical commonly used to improve water clarity is a. alum b. muriatic acid c. hydrogen chloride d. sodium carbonate alum 57 | P a g e When chlorine is added to water a. one acid is formed b. two acids are formed c. HCl is considered the primary product d. ozone is produced in large quantities one acid is formed Which of the following would not be as likely to be contracted bathing at a beach? a. leptospirosis b. middle ear infection c. spinal meningitis d. all of the above spinal meningitis The causative agent Naegleria fowleri has been linked to which of the following diseases? a. bacterial meningitis b. PAM (primary amoebic meningoencephalitis) c. cholera d. diptheria PAM A seechi disk is used to determine; a. pH b. clarity in recreational waters c. coliform contamination d. heavy metals clarity in recreational waters A chemical used to adjust pool alkalinity is: a. chlorine b. calcium chloride c. sodium bicarbonate d. copper sulfate sodium bicarbonate Which raises the pH of pool water? a. chlorine b. alum 60 | P a g e a. chlorinated hydrocarbons b. acids c. bases d. all of the above chlorinated hydrocarbons The louder the sound, the greater the: a. frequency b. amplitude c. timbre d. pitch amplitude Maximum sensitivity to sound for humans is in the range of a. 500 - 1,000 cps b. 1,000 - 5,000 cps c. 5,000 - 10,000 cps d. 10,000 - 15,000 cps 1,000 - 5,000 cps Hearing loss that lasts a few hours following exposure to excessive noise is referred to as: a. sensorineural loss b. temporary threshold shift c. conductive loss d. noise induced hearing loss temporary threshold shift The first type of hearing sensitivity to become damaged as a result of excessive noise exposure is sensitivity to: a. low frequencies b. middle frequencies c. conductive loss d. high frequencies high frequencies Loss of hearing to the extent that low frequency sounds are distorted or can't be heard is considered: a. sensorineural loss b. temporary threshold shift 61 | P a g e c. conductive loss d. noise induced hearing loss sensorineural loss Hearing loss that results from infections or trauma is called: a. sensorineural loss b. temporary threshold shift c. conductive loss d. noise induced hearing loss conductive loss The act that authorized the Environmental Protection Agency to work in partnership with state and local governments in the area of anti-noise programs was the: a. Quiet Communities Act b. Noise Control Act c. Noise Abatement Act d. Environmental Noise Pollution Act Quiet Communities Act The hearing ability of a fetus is well-developed by the a. 18th week b. 22nd week c. 26th week d. 28th week 28th week A constant buzzing or ringing in the ears is called: a. sensorineural impact b. tinnitus c. threshold abridgment d. ottis media tinnitus Age-related hearing loss is referred to as: a. preemptive throshold shift b. presbyopia c. presbycusis d. predysplasia 62 | P a g e presbycusis By age 65 the number of Americans who experience hearing loss sufficient to affect communication is: a. 1 in 2 b. 1 in 3 c. 1 in 4 d. 1 in 5 1 in 4 The amount of time required to produce permanent damage to hearing is cut in half with an increase in sound of a. 3 dB b. 5 dB c. 7 dB d. 9 dB 5 dB A minimum of ______ of sleeping area per person is required in the APHA appraisal method a. 10 ft2 b. 20 ft2 c. 40 ft2 d. 60 ft2 40 ft2 The ASHRAE recommended minimal thermal standard for dwellings is _____ at 40% humidity and an air circulation rate of 45 fpm. a. 57F b. 60F c. 68F d. 76F 76F The end of a waste pipe should terminate at least ____ above the rim of a sink or receptacle directly connected to the drainage system. a. 2in b. 4in c. 5in d. 6in 2in 65 | P a g e b. biosafety level 2 c. biosafety level 3 d. biosafety level 4 biosafety level 2 A national performance standard has been developed by the a. National Sanitation Foundation b. National Safety Council c. National Institute of Health d. American Biological Safety Association National Sanitation Foundation The appointment and maintenance of an Institutional Biosafety Committee (IBC) is one requirement of a. EPA b. CDC c. NIH d. FDA NIH ________ is the failure to perform an official duty without sufficient excuse a. nonfeasance b. misfeasance c. malfeasance d. a or b above nonfeasance An example of _______ is closing down an establishment without sufficient excuse. a. nonfeasance b. misfeasance c. malfeasance d. none of the above misfeasance ______ is the doing of an authorized act in an unauthorized manner a. nonfeasance b. misfeasance c. malfeasance d. feasance 66 | P a g e misfeasance An individuals right to be treated with at least minimum of decency and fairness by governmental officials is guaranteed by the provision of a. state rights b. home rule c. equal protection d. due process due process If a health official failed to close a restaurant known to have imminent health dangers this is a. misdemeanor b. malfesance c. misfeasance d. nonfeasance nonfeasance What is the most important means of enforcement of the Federal Food Drug & Cosmetic Act? a. embargo b. licensing c. registration d. inspection embargo The term applied to certain incorporated towns or cities in which the state of constitution or legislature gives them the right to formulate and adopt city characters and regulate their own affairs is a. eminent domain b. ultra vires c. inherent law d. home rule home rule In legal terminology the power of condemnation is also known as a. eminent domain b. noscitur ad sociis c. law of nuisances d. judicial presumption eminent domain 67 | P a g e Police power a. is about derived from mostly federal laws b. is assigned entirely to the federal government by the constitution c. cannot be used except by a police officer d. is almost exclusively left to individual states to establish and enforce laws for the citizens welfare is almost exclusively left to individual states to establish and enforce laws for the citizens welfare Which component of clean dry air has the smallest volume? a. carbon monoxide b. nitrogen dioxide c. ammonia d. sulfur dioxide sulfur dioxide Major effects on humans are caused by Los Angeles and London- type smog, along with what two pollutants? a. sulfur dioxide and hydrogen fluoride b. sulfur dioxide and carbon monoxide c. hydrogen sulfide and peroxacyl nitrates d. ozone and nitrogen dioxide sulfur dioxide and hydrogen fluoride What type of air pollution causes loss of chlorophyll in plants? a. PAN (peroxyacyl nitrates) b. sulfur dioxide c. industries processing hazardous wastes d. high motor vehicle traffic PAN (peroxyacyl nitrates) Injury to plant due to _____ shows up as flecks, stipple and bleaching, tip burns on conifers, and growth suppression. a. ozone b. peroxyacyl nitrates c. hydrogen fluoride d. sulfur dioxide ozone Glazing, silvering, or bronzing on the underside of a leaf is evidence that injury has occurred by