REHS Questions and answers 2023 with complete solution

What would you expect from a swimming pool with a high pH reading? Cloudiness and eye irritation Which will raise the pH of a pool? a. Calcium Bicarbonate b. Calcium Carbonate c. Soda Ash or Caustic Soda Soda Ash or Caustic Soda Soda ash is Sodium Carbonate NaCO3 Caustic Soda is NaOH Which chemical is used to oxygenate swimming pool water? a. Ozone b. Sodium Carbonate c. Sodium Bicarbonate d. Calcium Carbonate Sodium Carbonate How would a swimmer most likely contract Legionella pneumonophila from a pool? a. ingestion of pool water b. direct contact with pool water c. inhalation of pool water inhalation of pool water Swimming pool water clarity is measured in NTUs, it is recommended that a level of 0.5 NTU: a. Shall be maintained b. Shall not be exceeded c. Is a minimum level d. Is a maximum level Shall not be exceeded Microbe entirely responsible for skin infections in a whirlpool is: Pseudomonas Aeruginosa The formula: Volume of pool (gal) / pump flow rate (gpm) x 60 (min/hr) = turnover rate will tell the: a. Number of hours it will take for the entire contents of pool to pass through the filters b. gallons per minute flow rate c. chlorine demand d. efficiency of pumps Number of hours it will take for the entire contents of pool to pass through the filters A pool filtration system should filter the entire volume of water every: a. 2-3 hours b. 6-8 hours c. 10-12 hours d. 12-24 hours 6-8 hours The water depth should be clearly marked on the pool perimeter for every ___ of depth change: a. 6 foot b. 5 foot c. 2 foot d. 1 foot 2 foot It has been found that pools less than 30 feet wide and with a surface area of less than 1600 sq feet: a. may utilize skimmers instead of gutters b. may utilize gutters instead of skimmers c. are not required to have disinfectant feeders d. do not have to use continuous equipment operation may utilize skimmers instead of gutters The pool must be designed to: a. fit the expected numbers of swimmers b. with oversized filters to meet unexpected peak demands c. with a variety of filter types to provide filtering options for the operator fit the expected numbers of swimmers The fresh water supply line to the pool must: a. have a direct solid connection to the public water supply b. fill to the pool through an approved air gap c. have an approved pump hooked to the public water supply line to suck the water to the pool for fast fills d. none of the above fill to the pool through an approved air gap In large pools with outlets more than 5 feet from the end wall, pool inlets should be located every: a. 30 feet b. 10 feet c. 20 feet d. 5 feet 20 feet Pool inlets should be located a minimum of 10 inches to 15 inches below the water line to: a. ensure good mixing b. prevent clogging c. prevent loss of disinfectant d. ensure mixing of pH additives poured into the pool prevent loss of disinfectant 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 The connection between the pool drain and the sanitary sewer must: a. be solid copper no less than 3 inches in diameter b. be solid cast iron or NSF approved PVC c. have a properly located cleanout d. be provided with an air gap no less than 2 pipe diameters of the discharge pipe be provided with an air gap no less than 2 pipe diameters of the discharge pipe If an REHS receives a complaint about an abandoned swimming pool that is green colored and has mice, what should he or she do first? a. verify with an inspection b. contact another agency and discuss the details c. discuss code with complainant, dismiss the complaint d. catch the mice verify with an inspection Lighting, circuits and nearby receptacles should be protected by ground-fault circuit-interupters are required to help prevent ____. Electrocution ___ ___ is used to reduce the chlorine loss by protecting the free chlorine in the pool from the sun's ultraviolet rays, reducing the amount of chlorine needed to maintain proper sanitizer levels. Cyanuric Acid In Utah, concentration of cyanuric acid in the water must be at least ___ milligrams per liter, but may not exceed 100 mg per liter 10, 100 Areas exposed to high levels of sunlight should maintain ___-___ ppm cyanuric acid 60-80 Under normal sunlight conditions ___-___ ppm cyanuric acid should be maintained 30-50 Diarrhea in a pool, chlorine level is raised to what and for how long? a. 3 ppm, 19 minutes b. 20 ppm, 12.75 hours c. 7 ppm, 120 hours d. 10 ppm, 72 hours 20 ppm, 12.75 hours Which chemical will lower pH in a pool? a. ozone b. dichlor c. trichlor d. calcium hypochlorite trichlor Which is the slowest pool filter? Cartridge What is best for a leaking septic tank? a. replace every 5 years b. cover with a metal lining c. inject seams with an epoxy resin inject seams with an epoxy resin Common causes of failure of septic tank seepage field systems include improper sizing, non-suitable soil, non-servicing, and: a. insufficient nutrients in tank b. excessive use of laundry detergents c. leaking fixtures d. use of wetting agents leaking fixtures After servicing a septic tank, it is important that the tank or lid be: replaced and secured for security purposes After a septic tank has been cleaned it should not be disinfected, why? a. the sludge sticking to the insides would have a seeding effect and assist in renewing the bacterial activity b. you cannot pay anybody enough money to crawl inside one and clean it c. it would be considered a safety hazard d. a and c above a and c above First thing you do when a new septic tank is installed? a. add yeast, wait 6 months b. use as normal use as normal How deep should the absorption beds and trenches in a drainfield be for a septic system? a. Deep (12 ft) and sloped b. shallow (1-5 ft) and level shallow (1-5 ft) and level What formation should an absorption beds be with a water table of 6 inches? Mounded How often should a septic tank be inspected? a. annually b. biannually c. every 5 years biannually How often should septic tank be pumped? a. every 3-5 years, depending on use b. everyday c. never d. annually every 3-5 years, depending on use A septic tank is found to be sitting in a high water table, what is a possible consequence? The tank may float or tilt A newly installed septic system can be used within: a. 24 hours b. 6 months c. immediately immediately Sludge can be disposed of in all of the following ways except: a. composting b. landfill c. ocean dumping d. incineratino ocean dumping Ground water samples are taken all of the following ways except: a. bored b. dug c. cores d. percolation test percolation test EPA stream water quality rate for fecal coliforms is: a. when coliforms are 200 colonies per 100 ml or less b. no coliforms in water c. according to city code when coliforms are 200 colonies per 100 ml or less Wastewater treatment plant employee is likely to get what? Hepatits A How to determine amount of coliforms in water? a. plate count test b. total coliform count or the COLILERT test c. total plate count total coliform or the COLILERT test Which produces the most BOD: a. small office building b. restaurant c. trailer park d. daycare/school restaurant Lime coagulation, mixed media filtration and activated carbon filtration will greatly reduce: EPA priority pollutants Plants absorb certain constituents of wastewater. Using wastewater for irrigation of consumable plant products may present a health hazard to humans if the water contains: Cadmium The reliability and interpretation of the soil percolation test are affected by all of the following except: a. evaluation of site investigation, soil profile, and suitability b. size or diameter of the test hole c. shape of the test hole d. saturation of soil shape of the test hole Which soil is least suitable for subsurface absorption of waste water? a. red b. yellow c. blue d. mottled brown mottled brown The most effective method discovered for running a percolation test is to make tests in holes that have been: filled with water overnight Which travel further in a wastewater treatment plant drain field: a. helminth b. bacteria c. virus d. protozoa virus Drain field has a water table that rises 6". The best type of drain field would be: long narrow trench, hump All are found at a wastewater plant except? a. on site chemist b. EPA certified operator c. licensed wastewater operator on site chemist Stream pollution with nitrogen (goes from NH to NO3 to NO2 to NO) effects what downstream? Fish, Ecosystems EPA Priority Pollutants are: Sulfur Dioxide, Carbon Monoxide, Ozone, Nitrogen Dioxide, Promethium, Lead If there is a disaster and there is no running water for flushing toilets, what would be the best way to control raw sewage? a. Dig a trench and have lime to cover the odor b. Privy toilet with a fluid reservoir c. Pit or privy toilet with a dug out hole d. Bucket with sealed container and sanitized disposable bags e D and C above D and C above How many porta potties need to be available for a festival or gathering of people? 1 seat per 100 A fly can emerge from how many inches of compacted soil? 6 inches What is the major constituent of landfills? Paper What is the minimum distance separation between a sewer line and a water line in a mobile home park? a. 3 feet b. 5 feet c. 10 feet d. 15 feet 10 feet A 1000 gallon septic tank should hold wastewater for how long? 12 hours with 24-72 recommended Blood lead levels, CDC recommend getting checked at: a. 3 ug/dl b. 5 ug/dl c. 10 ug/dl d. 15 ug/dl 5 ug/dl In children, blood lead levels more than _____ are associated with decreased intellectual performance and other adverse health events: a. Any lead in blood leads to health defects b. 5 ug/l c. 10 ug/l d. 45 ug/dl Any lead in blood leads to health defects Vent gases combined with high moisture inside a chimney will form: a. a glass-like glaze b. hydrochloric acid c. sodium chloride d. sulfuric acid sulfuric acid Lead poisoning is commonly associated with children living in homes built before: a. 1980 b. 1978 c. 1950 d. 1940 1978 Concentrations of Radon from Environmental Protection Agency's (EPA) action level is: 4 pCi/l What for characteristics are used to classify hazardous materials? Ignitability, Corrosivity, Reactivity, Toxicity All of the following are characteristics of hazardous materials except? a. Reactivity b. Ignitability c. lethality d. corrosivity lethality What is not considered as hazardous waste? Autoclaved serum An REHS receives a call about a hazardous 55 gallon container, what should he/she do first? a. Evacuate the area and call EPA b. Open it up and take a look c. Get info off the label d. Check for leaks Get info off the label Respirators are inspected and approved by? a. OSHA b. NIOSH c. EPA d. CDC NIOSH When inspecting medical wastes, an REHS should look for? a. Sharps containers and red bags b. Sterilized needles and sharps containers c. Sterilized equipment and white bags sharps containers and red bags Trichloroethylene is used in the industry is what? a. gasoline b. dry cleaning dry cleaning What is in crankcase oil? Heavy metals and additives People in a building are complaining of respiratory issues when in a specific building, what is the most likely cause? a. HVAC b. outside air pollution c. presence of a disease in a community HVAC Why are personal monitors better than area monitors? They are more accurate for exposure Proper term for disinfectant that is used on skin? a. antiseptic b. sanitizers c. disinfectants antiseptic Most likely to get typhoid fever from? a. aquifer b. pit or privy toilet adjacent to a spring pit or privy toilet adjacent to a spring What is most likely the cause of biological contamination and causing health defects at home? a. pet dander b. tobacco smoke c. volatile organics tobacco smoke An apartment tenant is complaining about a rash with red marks, this is most likely NOT from: a. ticks b. fleas c. bedbugs d. louse ticks What is someone most likely to get from a prison facility? Staph and Hep B or C What type of hepatitis is transmitted fecal/oral? Hep A and E A dirty bar of soap is likely to be considered a/an? a. vehicle b. fomite c. aggregate fomite How many tenets are there to establish a healthy home? a. 5 b. 6 c. 7 d. 8 7 How is giardiasis transmitted? Person to person transfer from infected feces Silicosis is caused by breathing: a. too much dust into lungs b. microscopic amount of asbestos in lung lining c. repeated and lengthy exposure to tiny bits of silica dust repeated and lengthy exposure to tiny bits of silica dust All of the following affect the development of silicosis except? a. size of particles b. type of particles c. size of asbestos particles d. size of silicate particles size of asbestos particles Which part of the body does typhoid fever affect? circulatory What genus of mosquito is most likely to carry West Nile Virus? Culex What is the most common type of cockroach found in urban areas in the US? a. German b. French c. Chinese d. American German What type of cockroach is called and considered a waterbug? a. German b. French c. Oriental d. American Oriental Hepatitis B is transmitted by: Blood, Urine, and Sperm Hepatitis C is transmitted by: Blood, sharing of needles Hepatitis D is transmitted by: Blood, unprotected sex Which form of Hepatitis goes away after a while? Hepatitis E Amoebic Dysentery is most likely caused by? a. bacteria b. protozoan c. fungi d. shit protozoan Influenza is spread by? Direct contact What is the benefit of using a licensed pest control company? a. cost b. less risk of pests developing chemical resistance less risk of pests developing chemical resistance What is the carrier of hantavirus? a. deer b. dogs c. rodents rodents Nosocomial infections are found where? hospitals What is the most likely cause of nosocomial infections in hospitals? poor handwashing Which air flow pattern in a hospital is least risky? hallway to dirty linen closet Household wastes are exempt from RCRA requirements (t/f) true What are three things for protection against radiation? Time, Distance, Shielding At a minimum, what will protect you from alpha particles? a. a sheet of paper b. 2 inches of lead a sheet of paper Where do you sample for radon in schools? a. stairwells and locations with poor ventilation b. ground floor stairwells and locations with poor ventilation What pet is not allowed in a daycare? a. dog b. cat c. parrot d. hamster parrot What pet causes psittacosis? a. dog b. cat c. bird bird What should a homeowner use to get rid of rats and how long? warfarin for 2-3 weeks Sampling for Giardia is conducted by ___ gallons through a ___ um pore filter 500, 1 What is the incubation period for a chemical food borne illness? a. 1-7 hours b. 1-2 days 1-7 hours A description is given on the types of environments microbes like to grown in. What microbe grows best with a lack of oxygen? Anaerobe If you receive a call saying that a house/building/place of residence is overrun with cats, which is the best agency to assist with the inspection? a. animal control b. zoning enforcement animal control Best place to store fish in a refrigerator? a. under fruits and vegetables but over meats b. far away from the refrigerator door c. on top shelf under fruits and vegetables but over meats What is the most likely barrier that a REHS will encounter with a manager when performing an inspection at a restaurant? a. quickly getting through the inspection questions b. the manager simply doesn't have itme c. a busy and noisy kitchen a busy and noisy kitchen All should be in a human and science kitchen except? a. hot water b. hand wash sink c. soap d. sanitized cloth towel sanitized cloth towel What symbol is stamped onto USDA inspected meat? a. circle b. square c. diamond d. triangle circle What is considered to be comminuted? a. bacon and ham b. roast and steak c. fish and seafood d. hamburgers and hotdogs hamburgers and hotdogs The quantity of liquid bleach used to treat 1,000 gallons of bacterially contaminated water for drinking is? 1 pint Freezing food does what to toxins? nothing Chicken from a freezer placed into a fridge to be used later is called? Thawing What are the CCPs in receiving and preparing chicken? a. purchasing, receiving, thawing, cutting and processing, cooking, hot holding, cooling, reheating b. heating chicken to 165 degrees F heating chicken to 165 degrees F What is the onset time for symptoms of a chemical foodborne infection? 1-7 hours Bringing frozen chicken from -32 F to 12 F for the purpose of deep frying is called? a. slacking b. moderating c. thawing slacking What pH encourages staph growth? 6-7 All of the following containers should be disposed of after a flood except? a. glass jars b. cans c. crown topped bottles d. rust cans cans You see a dumpster overflowing with food, what should you communicate to the owner as the biggest concern? a. odor b. aesthetics c. breeding areas d. vector e. c and d c and d Who is ultimately responsible for not transferring disease in a tattoo parlor? a. owner/artists b. health department c. customer d. EPA owner/artists An ice machine is supposed to be drained how? a. nearest p-trap b. through an air gap into an open drain through an air gap into an open drain A chef prepares sandwiches with cold cut meats for a catering event, how soon should they be eaten after preparation? 4 hours A bushel of apples test higher than tolerant levels of pesticides, the food is? adulterated Shellfish tags should be kept for how many days? a. 30 b. 60 c. 90 d. 120 90 What does it mean when milk tests negative for phosphatase? a. pasteurization was successful b. post-pasteurization contamination occurred c. pasteurization was unsuccessful pasteurization was successful You do an inspection on April 8th, and find milk with a date that says April 4th. What does the date on the carton of milk indicate? a. date of pasteurization b. last date the milk can be sold last date the milk can be sold An REHS gets a call from a retirement facility with moldy baseboards in an empty room. What does the REHS do first? a. find the source of water b. place a dehumidifier in the room c. clean with warm soapy water find the source of water What determines risk categorization of establishments? a. outbreaks, class 1 recalls, and inspection history b. outbreaks, all recalls, and inspection history outbreaks, class 1 recalls, and inspection history Who is in charge when there is a terrorism threat? a. incident commander b. chief c. operations manager incident commander Who becomes the person in charge after a disaster situation? a. police chief b. fire chief c. trained commanding personnel d. first person at the site becomes the person in charge trained commanding personnel In the FDA 2009 food code, hazards are defined as a. priority b. priority foundation c. core d. core principles priority For first responders at an incident, the order of importance is: ___ safety, ___ safety, ___ safety, ____ protection responder, public, environment, property The government organization that usually deals with major disasters is the: FEMA Who responds to a terrorist threat? a. FBI b. FEMA c. DOD d. EPA e. a and b a and b Intention conduct that is wrongful or unlawful is? Malfeasance Conduct that is lawful but inappropriate? Misfeasance Failure to act where there was a duty to act is? Nonfeasance Agencies that are responsible for protecting food against terrorism? USDA, HHS, EPA, Fern, and eLEXNET What is the ratio for the steepness of a ramp? 1:12 What is the population growth of the world annually? 83 million What is a prevalent wind? a. winds that blow in a general direction most of the time b. winds that blow predominantly from a single direction most of the time c. winds that blow predominately to a single direction some of the time d. winds that blow hardest from a single general direction, most of the time winds that blow predominantly from a single direction most of the time What legal principle protects people's rights? a. due process b. bill of rights c. writ of mandamus due process You would expect to see an increase in all of the following during a disaster situation except? a. brown recluse spider population b. number of rodent breeding harborages c. number of insect breeding grounds brown recluse spider population