REHS Exam (New 2024/ 2025 Update) Questions and Verified Answers| Grade A| 100% Correct, Exams of Advanced Education

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REHS Exam (New 2024/ 2025 Update) Questions and Verified Answers| Grade A| 100% Correct 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 - Correct Answer-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 - Correct Answer-coliform 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 - Correct Answer-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 - Correct Answer-ammonia The presence of which of the following elements in water treatment plant effluent is used as a measure of filtration efficiency? c. sodium bisulfate d. sodium bisulfite - Correct Answer-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 - Correct Answer-presence of detergents containing phosphates Which organism is not known as an iron bacterium? a. crenothrix b. giardia lamblia c. ferric chloride d. leptothrix - Correct Answer-giardia lamblia The final product in biochemical oxidation of ammonia yields; a. nitride b. nitrite c. nitrate d. nitrogen - Correct Answer-nitrate Which contaminant in water is associated with methemoglobinemia? a. zinc b. lead c. copper d. nitrate - Correct Answer-nitrate The substance constantly used as a coagulant in water treatment is: a. aluminum sulfate b. calcium sulfate c. potassium chloride d. sodium phosphate - Correct Answer-aluminum sulfate The disinfecting ability of chlorine is affected most by: a. BOD b. temperature c. hydrogen ion concentration d. dissolved oxygen - Correct Answer-hydrogen ion concentration Alkalinity exists in three forms, which is not one of these forms? a. bicarbonate b. hydroxide c. carbonate d. hypochlorite - Correct Answer-hypochlorite Which of the following would not contribute to water hardness? a. calcium sulfate b. magnesium sulfate a. dissolved oxygen b. iron c. p1-1 d. sodium - Correct Answer-sodium The langelier index is used to determine the point of stability of a. aluminum sulfate b. calcium carbonate c. water pH d. HOCL - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-selecting plants that can thrive on natural precipitation a. leptospirosis b. middle ear infection c. spinal meningitis d. all of the above - Correct Answer-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 - Correct Answer-PAM A seechi disk is used to determine; a. pH b. clarity in recreational waters c. coliform contamination d. heavy metals - Correct Answer-clarity in recreational waters A chemical used to adjust pool alkalinity is: a. chlorine b. calcium chloride c. sodium bicarbonate d. copper sulfate - Correct Answer-sodium bicarbonate Which raises the pH of pool water? a. chlorine b. alum c. sodium carbonate d. all - Correct Answer-sodium carbonate The preferred treatment of algae control is: a. copper sulfate b. superchlorination c. quaternary ammonium d. drain and scrub pool - Correct Answer-superchlorination Muriatic acid is a wear solution of: a. nitric acid b. sulfuric acid c. acetic acid d. hydrochloric acid - Correct Answer-hydrochloric acid In which situation would you most likely find PAM? a. river or pond b. geothermal pool c. reservoir d. atlantic ocean - Correct Answer-reservoir The main drain should have a grate that is _____ the area of the discharge pipe to prevent dangerous suction effects a. 4 times b. 5 times Sources of dioxin include: a. wood preserved with PCPs b. paper mill bleached pulp and sludge c. bleached paper products d. all of the above - Correct Answer-all of the above Neutralization and detoxification are feasible with most of the organophosphate and carbamate insecticides, but not with the a. chlorinated hydrocarbons b. acids c. bases d. all of the above - Correct Answer-chlorinated hydrocarbons The louder the sound, the greater the: a. frequency b. amplitude c. timbre d. pitch - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 c. conductive loss d. noise induced hearing loss - Correct Answer-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 - Correct Answer-conductive loss a. 3 dB b. 5 dB c. 7 dB d. 9 dB - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-2in The distance between the end of the water supply pipe and the sink should be the diameter of the supply pipe a. 1 1/2 b. 2 c. 3 d. 4 - Correct Answer-2 Excessive condensation, corrosion, and mildew occur when the relative humidity exceeds a. 20% b. 40% c. 80% d. 60% - Correct Answer-60% Vent gasses combined with high moisture inside a chimney will form a. a glass like glaze b. hydrochloric acid c. sodium chloride d. sulfuric acid - Correct Answer-sulfuric acid Radon cannot be reduced with which of the following devices a. humidifier b. electrostatic precipitators c. ionizers d. none of the above - Correct Answer-none of the above d. biosafety level 4 - Correct Answer-biosafety level 2 The term containment is used in describing a. control of infectious wastes in the laboratory b. a biosafety cabinet c. safe methods for managing infectious agents in the laboratory d. facilities designed for research on recombinant DNA - Correct Answer-safe methods for managing infectious agents in the laboratory Campylopbacter may be safely used in the lab as a minimum at a. biosafety level 1 b. biosafety level 2 c. biosafety level 3 d. biosafety level 4 - Correct Answer-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 - Correct Answer- 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 - Correct Answer-NIH ________ is the failure to perform an official duty without sufficient excuse a. nonfeasance b. misfeasance c. malfeasance d. a or b above - Correct Answer-nonfeasance An example of _______ is closing down an establishment without sufficient excuse. a. nonfeasance b. misfeasance c. malfeasance d. none of the above - Correct Answer-misfeasance ______ is the doing of an authorized act in an unauthorized manner a. nonfeasance b. misfeasance c. malfeasance d. feasance - Correct Answer-misfeasance 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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-ozone Glazing, silvering, or bronzing on the underside of a leaf is evidence that injury has occurred by a. ozone b. PAN (peroxaacyl nitrates) c. sulfur dioxide d. hydrogen fluoride - Correct Answer-peroxaacyl nitrates Emissions which find their way into the ambient air without being vented through a stack are known as a. escaped emissions b. fugitive emissions c. phantom emissions d. all of the above - Correct Answer-fugitive emissions ________ can be formed as a result of the sun's action on nitrogen oxides and hydrocarbons 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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-radiation inversion The major source of sulfur dioxide is a. natural erosion of soils b. fuel combustion c. industrial processing d. road traffic - Correct Answer-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 - Correct Answer-carbon monoxide One of the main precursors of acid rain is a. nitrogen oxide b. carbon dioxide c. sulfur dioxide d. ozone - Correct Answer-sulfur dioxide The only criteria gas that is colored is a. nitrogen dioxide b. carbon dioxide c. ozone d. sulfur dioxide - Correct Answer-nitrogen dioxide The major constituent of the photo-chemical oxidant is a. sulfur dioxide b. ozone c. peroxyacetyl nitrate d. nitrogen dioxide - Correct Answer-ozone c. encephalitis d. yellow fever - Correct Answer-Q fever Why are anti-coagulant type rodenticides coated with paraffin? a. prevents rodents from smelling poisons b. slows down killing effect so rodents can die in nest c. prevents decomposition of poison by rain moisture d. increases toxicity of poison - Correct Answer-prevents decomposition of poison by rain moisture Which method of mosquito control is not very effective for nuisance prevention? a. screening b. fogging c. residual spray d. propellants - Correct Answer-residual spray The one of the following diseases which is caused by a virus a. encephalitis b. malaria c. Q fever d. tetanus - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-infectious hepatitis A rodenticide which is also an emetic is a. strychnine b. red squill c. warfarin d. arsenic - Correct Answer-red squill Lasso is the trademark for a. acrolein b. atrazine Which of the following is unlike the rest regarding epidemiology? a. malaria b. rocky mountain spotted fever c. rabies d. eastern encephalitis - Correct Answer-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 - Correct Answer-yellow fever Which of the following is not related to echinococcosis a. dogs b. cats c. sheep d. tapeworm - Correct Answer-cats The infection reservoir for anthropod-borne viral encephalitis is generally accepted to be a. horses b. humans c. birds d. fish - Correct Answer-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 - Correct Answer-tertiary prevention Which is not a primary source for giardia lamblia cysts? a. beavers b. humans c. roaches d. muskrats - Correct Answer-roaches As of 1975, the diseases which caused 2/3's of the deaths in the US included all but which of the following? a. cerebrovascular disease b. influenza c. cancer d. heart disease - Correct Answer-influenza Clostridium botulinum spores are killed in a. 10 to 15 minutes at 80C b. 10 to 15 minutes at 80F c. 1 minute at 250F d. 10 to 15 minutes at 230F - Correct Answer-10 to 15 minutes at 230F A freezer unit for frozen food should maintain temperatures of ___ or below a. 32F b. 24F c. 10F d. 0F - Correct Answer-0F To prepare a solution of 100 mg per liter available chlorine, _____ of 5.25% bleach with one gallon of water should be used. a. 0.5 oz b. 1.0 oz c. 0.33 oz d. 0.25 oz - Correct Answer-0.25 oz The detention time for waste water in a septic tank is recommended to be a. 6 to 12 hours b. 24 to 72 hours c. 1 week d. none of the above - Correct Answer-24 to 72 hours One of the most important factors contributing to disease transmission of microbiological agents is a. chlorination b. concentration or dose of microorganisms c. filtration d. flocculation - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-soil characteristics and depth to groundwater Detention time for septic tanks should be not less than a. 8 hours b. 12 hours b. alpha particles c. beta particles d. all of the above - Correct Answer-x-rays or gamma rays Lasers emit a. mechanical radiation b. ionizing radiation c. electromagnetic radiation d. none of the above - Correct Answer-electromagnetic radiation Microwave ovens use which of the following energy sources? a. mechanical b. electromagnetic c. ultraviolet d. radio waves - Correct Answer-electromagnetic In practice, exposure to ionizing radiation is controlled by the use of shields of lead a. true b. false - Correct Answer-false Biological effects should govern the required standards of radiological protection a. true b. false - Correct Answer-false The discoverey of the "x-rays" was a. Crookes b. Curie c. Roentgen d. Becquerel - Correct Answer-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 - Correct Answer-Lake Placid Which of the following is most penetrating a. alpha rays b. beta rays c. gamma rays d. x-rays - Correct Answer-gamma rays The best management for intensely radioactive isotopes that have very short half-lives is a. seal them in concrete and bury them b. isolate them from human contact during their "acute" phase c. bury them in specialized locations away from human habitats In terms of health problems associated with ionizing radiation, perhaps the most prudent way to safeguard public health is to a. limit the development of nuclear power plants b. require specific documentation of all medical x-rays c. limit the number of medical x-rays allowed per person d. subscribe to the linear dose-response curve - Correct Answer-subscribe to the linear dose-response curve Standards for ionizing radiation exposure are a. set to absolute safety levels b. represent a balance between adverse effects and known benefits c. are designed to assist equipment manufacturers design safe machines d. are based on definitive scientific research - Correct Answer- represent a balance between adverse effects and known benefits Prior to 2008 there have been no new nuclear reactors ordered by the US utility companies in the US since a. 1976 b. 1978 c. 1980 d. 1982 - Correct Answer-1978 The percentage of electrical energy generated for use in the US by nuclear power plants is approximately a. 10% b. 20% c. 30% d. 40% - Correct Answer-20% The major problem associated with uranium mining is the possible development of a. leukemia b. skin cancer c. lung cancer d. malignant melanoma - Correct Answer-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 - Correct Answer-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 - Correct Answer-production of radioactive tailings Under normal operating conditions, public exposure to ionizing radiation from nuclear power plants is primarily from It is generally accepted that the most widespread chemical contaminant known is a. dioxin b. mercury c. PAN (polychlorinated biphenyls) d. lead - Correct Answer-PAN (polychlorinated biphenyls) The primary route of entry of PCBs into humans is a. absorption b. inhalation c. inoculation d. ingestion - Correct Answer-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 - Correct Answer-heart attack 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 - Correct Answer-heart The most common occupational exposure to mercury is through a. inhalation b. absorption c. ingestion d. inoculation - Correct Answer-inhalation The most common source of exposure to cadmium is through a. inhalation b. absorption c. ingestion d. inoculation - Correct Answer-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 - Correct Answer-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 - Correct Answer-none of the above Landfill sites should be at least _____ from streams, lakes, or other surface bodies of water a. 200 feet b. 2000 feet c. 200 yards d. 100 feet - Correct Answer-100 feet Leachates containing primarily low molecular weight organic compounds are best treated by a. biological methods b. physical-chemical demands c. physical methods d. both a and b - Correct Answer-biological methods Which hazard is related to size reduction method for solid waste? a. toxic gases b. rodent problems c. insect infestations d. explosions - Correct Answer-explosions Which statement is correct in regards to methane gas production a. aerobic methane gas producing bacteria produce methane b. anaerobic methane gas producing bacteria produce methane c. acidic conditions prohibit methane production d. acidic conditions do not influence methane production - Correct Answer-anaerobic methane gas producing bacteria produce methane The most satisfactory basis for measuring quantities of solid waste is by a. volume b. volume and weight c. volume per cubic yard d. weight - Correct Answer-weight The type of sanitary landfill that should be developed on essentially flat land sites in dry areas is a. depression landfills b. area landfills c. progressive excavation landfills d. cut and cover landfills - Correct Answer-area landfills 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 - Correct Answer- 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 a. risk b. hazard c. exposure d. toxicity - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-sulfur dioxide Regulations regarding automobile emission standards began with automobiles manufactured in a. 1958 b. 1963 c. 1968 d. 1973 - Correct Answer-1968 The majority of sulfur dioxide originates from a. automobile exhaust b. coal and oil burning power plants c. industrial smelters d. volcanic eruptions - Correct Answer-coal and oil burning power plants The majority of nitrogen dioxide originates from a. pseudomonas b. coliform c. salmonella d. all of the above - Correct Answer-coliform Which residual test for chlorine would be least desirable? a. SNORT b. methyl orange c. OTA d. DPD - Correct Answer-OTA Which would not be used as a coagulant? a. black alum b. chlorinated copperas c. ferric chloride d. sodium hypochlorite - Correct Answer-sodium hypochlorite Which conditions would result in the worst case of pip damage due to corrosion? a. hard water, low alkalinity, presence of oxygen b. soft water, low alkalinity, presence of oxygen c. hard water, high acidity, presence of oxygen d. soft water, low acidity, presence of oxygen - Correct Answer-soft water, low alkalinity, presence of oxygen The addition of sodium bicarbonate it usually used to a. raise the ambient water temperature b. lower the ambient water temperature c. raise the alkalinity d. lower the pH - Correct Answer-raise the alkalinity The increase of dissolved solids due to evaporation in whirlpools, hot tubs, and spas is indicated by a. increased water temp b. condensation c. cloudy water d. foamy water - Correct Answer-cloudy water Swimming pools haven been implicated in many outbreaks of diseases, including a. rabies b. AIDS c. taeniasis d. leptospirosis - Correct Answer-leptospirosis Which organism would probably survive in a hot tub? a. E. Coli b. virbrio chlorea c. entamoeba histolytica d. pseudomonas aeruginosa - Correct Answer-pseudomonas aeruginosa A chemical used to adjust pool alkalinity is a. motorcycle b. automobile c. aircraft d. industrial - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-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 - Correct Answer-misfeasance 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 - Correct Answer-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 - Correct Answer-nonfeasance d. all of the above - Correct Answer-all of the above The pitch of the sound is determined primarily by a. frequency b. wavelengths c. sound pressure d. all of the above - Correct Answer-frequency The most common type of noise measurement device used for initial surveys to provide rapid evaluation and identification of potential problem areas is the a. octave-band analyzer b. noise dosimeter c. sound level meter d. sound analyzer - Correct Answer-sound level meter Chlorofluorocarbons increase the amount of ozone in the atmosphere a. true b. false - Correct Answer-false The frequency of a sound determines its pitch. a. true b. false - Correct Answer-true The Montreal Protocol agrees to control the a. use of CFC's b. use of all ozone depleting chemicals or substances c. production of ozone depleting chemicals or substances d. consumption of ozone depleting chemicals or substances - Correct Answer-use of all ozone depleting chemicals or substances Methyl bromide is used primarily as a. fertilizer b. herbicide c. pesticide d. fungicide - Correct Answer-pesticide The "Ozone Hole" was first noticed in a. Antarctica b. The Arctic c. Canada d. Chile - Correct Answer-Antarctica The major source of sulfur dioxide is a. natural erosion of soils b. fuel combustion c. industrial processing d. road traffic - Correct Answer-fuel combustion The major constituent of the photochemical oxidant is a. sulfur dioxide