Sanitarian Test Study Guide Part 3 Questions and Answers 100% Accurate, Exams of Public Health

Download Sanitarian Test Study Guide Part 3 Questions and Answers 100% Accurate and more Exams Public Health in PDF only on Docsity! Sanitarian Test Study Guide Part 3 Questions and Answers 100% Accurate Primary headworks of a wastewater treatment plant: - ANSWER-Bar screens, primary settling basins (clarifiers) A pH of 0 to 7 is what? - ANSWER-Acidic A pH of 7 is? - ANSWER-Neutral A pH of 7 to 14 is? - ANSWER-Basic If there is color in water, in order to remove it, it must be? - ANSWER-A suspension Is rabies a bacteria or virus? - ANSWER-Virus How does rabies infect a human? - ANSWER-Through their central nervous system What animals are safe from rabies? - ANSWER-rodents and lagomorphs (non mammalians) How is Hepatitis A transmitted? - ANSWER-Fecal-oral route - usually through contaminated food. How is Hep B transmitted? - ANSWER-blood-borne and transmitted by DNA, bloodm and body secretions What are coliform bacteria? - ANSWER-aerobic or facultative anaerobic bacteria that ferment lactose, acid, and gas formation within 48 hours at 35 C Coliform bacteria are used as indicator organisms in? - ANSWER-Water sanitation What is the prominent fecal coliform? - ANSWER-E. coli Compound chemicals are? - ANSWER-Chemicals with more than one compound What is radon? - ANSWER-Radioactive gas What is disinfection? - ANSWER-Killing of infectious agents outside the body by direct exposure to chemical or physical agents What does sterile mean? - ANSWER-Life free What does sanitized mean? - ANSWER-Reduced number of microbial to a noninfectious level What are sanitizing agents? - ANSWER-Cl2, I2, and quaternary NH4 What is a hydroxide? - ANSWER-hydrogen or oxygen NH3 is? - ANSWER-Ammonia NO3 in drinking water may cause? - ANSWER-Blue baby syndrome in pregnant mothers Table salt is what compound chemical? - ANSWER-NaCl What 3 elements are needed for bacterial growth? - ANSWER-Moisture, medium, and heat Salmonella is found in what food products? - ANSWER-Poultry How is rabies transmitted? - ANSWER-Through the saliva of an infected animal Where do vaccines for chicken pox come from? - ANSWER-Cattle derived Salads are very conductive to food poisoning. Why? - ANSWER-They may contain potentially hazardous foods and they have been exposed to human contamination by the food handler In food poisoning, what makes you ill? - ANSWER-The bacteria by-products In infections from food, what makes you ill? - ANSWER-The bacteria itself Staph infections: - ANSWER-spherical bacteria, highly heat stable toxins, cause rapid and acute symptoms Botulism: - ANSWER-foodborne, very severe, caused by ingestion of foods containing the spore forming anaerobic bacteria What is the minimum lot size for a plot with lots having perc rates of 1" in 31-60 minutes? - ANSWER-43,560 sq ft or 1 acre For subdivision plats, one core test is performed for every? - ANSWER-10 acres The soil depth for a perc test is? - ANSWER-24-30" The perc test is performed in the bottom_____ of the hole - ANSWER-8" Fire protection at landfills is provided by? - ANSWER-A fire extinguisher on all equipment, adequate cover over refuse, adequate stockpiles of soil, and available water Vector control at a solid waste disposal facility can be provided by? - ANSWER- Adequate daily cover The public health concerns related to whole rubber tires include? - ANSWER-Potential mosquito breeding, rodent harborage, threat of fire, and potential of compromising the integrity of landfill cover What is the goal of the Oklahoma Waste Tire Recycling Act? - ANSWER-Reduce public health concerns, direct current waste streams to permitted processors, and offset the cost of processing whole tires A uniform, compacted layer of at least 6" of suitable earthen material placed on all refuse by the end of each working day at a sanitary landfill is called? - ANSWER-Daily cover Casing on a private water system may extend above ground level how far? - ANSWER- 8 inches Min distance required between termite treated soil and a well when the house is located downhill from the well is? - ANSWER-50 ft Community surface water supply inspections are done? - ANSWER-4x/year Community groundwater supply inspections are done? - ANSWER-2x/year Minimum # of water wells for a community system is? - ANSWER-2 Distance a well should be no closer to a sewer line? - ANSWER-50 ft Lowest pressure allowable during the heaviest use period in a distribution system? - ANSWER-25 psi Operational tests for surface water plants are performed? - ANSWER-2x/ day Inlets or gates should be located in a reservoir intake so that water can be? - ANSWER- Taken from 3 depths After construction or major repair, a private potable water supply should be chlorinated to? - ANSWER-50-100 ppm Community wastewater is? - ANSWER-10 connections or 5,000 gal./day Preliminary water treatment: - ANSWER-removing debris with bar screens Primary water treatment: - ANSWER-Sedimentation by clarifier Secondary treatment: - ANSWER-Secondary clarifiers, trickling filters Primary headworks of waste water treatment plant: - ANSWER-Bar screens, primary settling basins (clarifiers) Secondary headworks: - ANSWER-Aeration basins, trickling filters, secondary settling basins Steps involved in water treatment: - ANSWER-Coagulation, flocculation, clarification, filtration, and disinfection What features should the gas chlorine storage feed room have? - ANSWER-Ventilation, respiratory protection equipment, and chlorine leak detection Public water supply plans must be designed and prepared by? - ANSWER-Registered professional engineer Sodium thiosulfate in bacteriological containers does what? - ANSWER-Neutralizes any chlorine If the state has primacy under the SWDA, bacteriological sampling is the responsibility of who? - ANSWER-The water system owner The use of activated carbon is to? - ANSWER-Control taste and odor The calcium carbonate stability test and Langelier's index indicate? - ANSWER-How corrosive or scaling the water is Aeration (usually pretreatment) may be used to reduce or remove? - ANSWER-Carbon dioxide, taste, and odor Flocculation: - ANSWER-Gentle stirring motion that brings colloidal particles in contact with the coagulant Adding alum to water will? - ANSWER-Lower pH If sufficient alkalinity is not present in water to complete the coagulation, what would be added to supply the needed alkalinity? - ANSWER-Lime Sedimentation is improved by? - ANSWER-Low velocity across the basin Fluoride at optimum levels in drinking water is good for teeth because? - ANSWER-It makes tooth enamel harder and more resistant to decay Chloramines are? - ANSWER-Formed when chlorine reacts with ammonia in water In the design of a ventilation system for a chlorine equipment room it must be considered that? - ANSWER-Chlorine is heavier than air Safe Drinking Water Act (1974) - ANSWER-Primary contaminates-health risk and Secondary contaminates-unpleasant What is alum (aluminum sulfate)? - ANSWER-Used as a coagulant and lowers pH How is corrosion measured - ANSWER-Measured by pH, alkalinity, and hardness Hard water is? - ANSWER-Salts of Calcium and Magnesium >or= to 100 mg/L Soft water is? - ANSWER-Salts of Calcium and Magnesium >or= to 60 mg/L What is sedimentation? - ANSWER-When floc particles are allowed to settle out of the water in a clarifier Turbidity+True Color= - ANSWER-Apparent color Lime causes? - ANSWER-Temporary softness to precipitate out and raises pH Name some water borne diseases: - ANSWER-Typhoid, cholera, dysentery, polio, hepatitis, giardiasis Surface water treatment: - ANSWER-1. Flash mix-initial coagulation 2. Coagulation 3. Flocculation 4. Sedimentation basin What is an Imhoff tank? - ANSWER-A variation of a septic tank with 2 chambers How much does a gallon of water weigh? - ANSWER-8.34 lbs How do you get tuberculosis? - ANSWER-Inhalation of droplets usually in crowded environments, poor conditions Air in light does what? - ANSWER-Reflects, absorbs, scatters Major air pollution source - ANSWER->100 tons of criteria pollutant NO source? - ANSWER-Transportation vehicles New and replacement equipment acquired after May 1, 1984 is required to meet the standards of? - ANSWER-The National Sanitation Foundation Where do you collect air samples in a suspected contaminated work area? - ANSWER- Employee work area Time it takes for 1/2 of a radioactive element to decay is: - ANSWER-Half life All sewer lines are to have manholes every 400 ft and at all: - ANSWER-Grade changes, size changes, and alignments what is the liquid capacity of a septic tank 6' in diameter by 5' liquid depth? A tank 4' by 4' by 6'? - ANSWER-((6 x 6 x 3.14)/ 4) x 5=141.3 ft^3 141.3ft^3 x 7.5= 1059.75 gallons* 4 x 4 x 6= 96 ft^3 96 ft^3 x 7.5= 720 gallons* A transporter of hazardous waste must? - ANSWER-Receive a EPA ID#, accompany each waste shipment with a manifest and not store waste longer than ten days at a transfer facility Facilities violating the Oklahoma Solid Waste Act may be fined/sentenced up to? - ANSWER-$25,000/day (formerly 10,000) a general rule of thumb for the acceptable size of a landfill working face is? - ANSWER- Two and a half times the width of the blade of the dozer The waste retention tank on a mobile food preparation unit must be what size? - ANSWER-At least 15% larger than the capacity of the potable water system The maximum temperature for storing frozen foods is? - ANSWER-10 degrees Potentially hazardous foods that have been cooked and then refrigerated shall be reheated rapidly to what temp? - ANSWER-165 degrees After revocation of a state food license, an owner must wait how long before s/he can apply for a new license? - ANSWER-As soon as the minimum standards have been met If food is detained for sampling, the owner or person in charge may request a hearing within? - ANSWER-10 days What is the minimum temperature used to keep food hot? - ANSWER-140 degrees What is the maximum temperature for keeping food cold? - ANSWER-45 degrees (for test purposes, now 41 degrees) What is the minimum temperature for reheating food? - ANSWER-165 degrees Name chemicals that are criteria for air pollutants: - ANSWER-NO, hydrocarbons, SO, CO, O3, Pb In a water treatment plant the addition of alum and lime produces? - ANSWER- Coagulation What is the 24 hr OSDH emergency number? - ANSWER-271-5221 Food does not have to be refrigerated if it has a pH below? - ANSWER-4.6 What is the pH of acid rain? - ANSWER-5.6 or less What is the required temperature for sanitizing dishes with a dishwasher that uses hot water to sanitize? - ANSWER-180 degrees Are pets allowed at a daycare center? - ANSWER-Yes but they must be clean, have current vaccinations, and be free of disease What is the proper procedure for sanitizing a well? - ANSWER-Disinfect well 50-100 ppm overnight, flush until no chlorine odor present, sample in one week A community surface water supply should be inspected at least how many times per year? - ANSWER-4 What is breakpoint chlorination? - ANSWER-The addition of chlorine until a free residual starts to be obtained How long after sludge application to the ground can you grow food chain crops? - ANSWER-18 months Why would you not put a landfill near an airport? - ANSWER-Because of birds causing accidents with the planes Average amount of waste a person uses each day? - ANSWER-7.5 lbs Residence-home=? - ANSWER-Dwelling Chronic exposure means? - ANSWER-long term S A R A establishes what? - ANSWER-Community right to know What radiation is ionizing? - ANSWER-Gamma What makes water taste bad? - ANSWER-Magnesium, sodium, sulfate, and iron What type of growth occurs in septic tanks? - ANSWER-Anaerobic The following must be cooked to at least what temperature? pork, ham= ground beef= poultry= fish= eggs= ratites= stuffed meat= roast beef= - ANSWER-pork, ham= 155 ground beef= 155, beef= 145 poultry= 165 fish= 145 eggs= 145 ratites= 155 stuffed meat= 165 roast beef= 130, 121 mins Heated pools must have a minimum temp of? Max? - ANSWER-Min= 75 degrees Max= 90 degrees Indoor non-heated pool temp? - ANSWER-Air temp=water temp -2 degrees to + 8 degrees Q= - ANSWER-flow of water in cubic ft./ sec V= - ANSWER-velocity of water in ft/ sec A= - ANSWER-area of pipe in sq ft V x A= - ANSWER-Q What is the flow in cubic ft/sec in a 6 inch pipe in which water flows at a rate of 4 ft/ sec? What is the flow in gallons/min? - ANSWER-A= (0.5x 0.5 x 3.14)/4=0.196 0.196 x 4= 0.784 cubic ft/sec* 0.784 x 60= 47.04 ft^3/min 47.04 x 7.5= 352.8 gallons/min* What is the capacity of a well 10 ft diameter with a depth of 50 ft? In gallons? - ANSWER-78.5 x 50= 3925 ft^3* 3925 x 7.5= 29,437.5 gallons*