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REHS/RS 3| 455 Questions| With
Complete Solutions
What is the slowest pool filter? correct answer: Cartridge You see dumpster overflowing with food, what should you communicate to the owner as the biggest concern? correct answer: Breeding areas/rodents Flies A chef prepares sandwiches with cold cut meats for a catering event, how soon should they be eaten after preparation? correct answer: 4 hrs (unless mentions staying under 70F after 4 hours then it is 6 hours or mentions something about cooling 6 hrs) Stream pollution with nitrogen (goes from NH to NO3 to NO to NO) effects what downstream correct answer: Fish, Ecosystems What is the most likely barrier ( communication) that an REHS will encounter with a manager when performing an inspection at a restaurant? correct answer: A busy and noisy kitchen Blood lead levels, CDC recommend getting checked at? correct answer: 5 ug/dl After servicing a septic tank, it is important that the tank or lid be... correct answer: replaced and secured for security purposes
Who is in charge when there is a terrorism threat? correct answer: First person at the site becomes the person in charge Common causes of failure of septic tank seepage field systems include improper sizing, non-suitable soil, non-servicing, and.. correct answer: leaking fixtures What are you most likely to get typhoid fever from? correct answer: Pit or privy toilet adjacent to a spring. *it is found in water. How to determine amount of coliforms in water? correct answer: Total coliform count or the colilert test An REHS receives a complaint about trash and mice in an abandoned lot, what should they do first? correct answer: call owner, cite code ordinances, tell him to get it cleaned up (Mice dont carry brucellosis , cows and buffalos do) Chlorine works best at what temp? correct answer: 68F How may tenets (tips) are there to establish a healthy home? correct answer: 5? What is most likely the cause of biological contamination and causing health defects at home? correct answer: Pet dander What legal principle protects people's rights? correct answer: Due process
A dirty bar soap is likely to be considered a/an correct answer: Fomite An apartment tenant is complaining about a rash with red marks, this is most likely NOT from... correct answer: Louse (probably from bed bugs) Who becomes the person in charge after a disaster situation? correct answer: Incident commander An REHS receives a call about a hazardous 55 gallon container, what should they do first? correct answer: Evacuate the area and call EPA What genus of mosquito is most likely to carry West Nile Virus? correct answer: Culex (common in US is Quinquefasciatus, tarsalis, or pipiens) Trichloroethylene is used in the industry in what? correct answer: Dry cleaning 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? correct answer: Verify with an inspection Sludge can be disposed of in all of the following ways except?
- Composting
- Landfill
- Incineration
- Ocean dumping correct answer: Ocean Dumping
Bringing frozen chicken from -32 degrees F to 12 degrees F for the purpose of deep frying is called what? correct answer: Slacking What pet is not allowed in a daycare? correct answer: Parrot People in a building are complaining of respiratory issues when in a specific building, what is the most likely cause? correct answer: HVAC (Heating, ventilation and air conditioning) Diarrhea in a pool, chlorine level is raised to what and for how long? correct answer: 20 ppm, 12.75 hrs Crypto = Diarrhea Giardia = Formed stool What formation should an absorption beds be with a water table of 6 inches correct answer: Mounded Leachate and Methane monitored in a garbage dump why? correct answer: Leachate (liquid) containing water may contaminate groundwater and methane production can be explosive at 5 & 15 percent. What is the most common type of cockroach in the US? correct answer: German Pharmaceuticals removed liquids or solids by a wastewater treatment plant? correct answer: Neither solids or liquids they don't breakdown are not removed they go into the environment and are found in freshwater.
The treatment system of a pool is typically recommended to be installed in which of the following flow arrangements? correct answer: 1. Skimmer or Gutter line
- Main drain line
- Adjustment valves
- Hair strainer
- Filter air pump
- Filters
- Disinfectant feeder
- pH feeder
- Adjustable inlets Which federal law regulates underground storage tank for hazardous wastes? correct answer: RCRA ( Resource conservation and recovery act) A measure of the probability and severity of adverse effects under specific condition BEST describes? correct answer: RISK Which of the following sampling devices is BEST for collecting undisturbed soil samples? correct answer: Split spoon Which of the following have little penetrating power and are normally a hazard to health only in the form of internal radiation received through ingestion, inhalation, or open wounds? correct answer: Alpha particles Blacksiphonage may be prevented by all of the following methods EXCEPT:
- Vacuum breakers
- Sir gap seperation
- Backpressure units
- Hydrostatic loops correct answer: Hydrostatic loops Which food does not require refrigeration at 41 F (5C)? correct answer: UHT creamers (ultra high temperature) What is the primary requirement in designing a food service facility? correct answer: cleanability The government organization that usually deals with major disasters is the: correct answer: Federal Emergency Management Agency (FEMA) The ideal pH range for swimming pools is: correct answer: 7. to 7.6 pH The formula: volume of pool/turn over time = desired flow rate (gallons per min). Will tell the: correct answer: # of hours it takes for the entire contents of the pool to pass through the filters The distance between the end of the water supply pipe and the sink should be how many times the diameter of the supply pipe? correct answer: 2X The biosafety containment level suitable for work involving agents of moderate potential hazard to personnel and the environment is: correct answer: Biosafety level 2 Schistosomiasis is a/an: correct answer: Water contact disease (schistosomiasis aka bilharzia or snail fever is a parasitic disease
Sludge accumulation in a tank serving a normal home has been estimated at: correct answer: 18 to 21 gals. per person per year HAZWOPER requirements apply to? correct answer: Voluntary clean up at uncontrolled hazardous waste sites How often should a septic tank for a private home be serviced? correct answer: Every 3 to 5 years Human disease from aerosals of wastewater: (WW) correct answer: Are related primarily to wastewater treatment by the activated sludge, trickling filter, and spray irrigation processes What does a mottled brown and red soil indicate? correct answer: Inadequate aeration methods Alternative small wastewater treatment systems are considered UNLESS: (WW) correct answer: Impervious formations are found at a depth of 10 ft. Lime coagulation, mixed media filtration, and activated carbon filtration will greatly reduce: (ch 5) correct answer: EPA Priority pollutants (environmental protection agency) It is known that some common pathogenic organisms found in wastewater will survive more than ___________ of harsh temperature extremes: correct answer: 2 years A storm sewer is used to: correct answer: Remove rain other standing surface water
Stream pollution is sometimes apparent by: correct answer: A zone of degradation A young lake is considered to be: correct answer: Oligotrophic 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: correct answer: Cd(cadmium) The term "universal precautions" refers to: correct answer: An infection control program regulating the handling of blood and certain body fluids. Particle size selective inlets are used to separate particulates above and below 2 to 3 microns in size on: (Air pollution ask Steve) correct answer: High-volume samplers Ozone reduces the useful life of all of the following except: correct answer: Nylon What is not a major source of sulfur dioxide pollution?
correct answer: Electrical substations The industries LEAST likely to be a source of sulfur dioxide pollution are:
Why is it important for a business that generates hazardous waste to deal only with licensed disposal companies that have a good compliance history? correct answer: The business is held accountable for where and how the hazardous waste generated is disposed of All of the following are considered advantages of using the "Shredded solid waste" landfill method EXCEPT which one?
- Does not cause odor
- May require daily earth cover
- Readily absorb precipitation
- Reduces insect breeding correct answer: readily absorb precipitation Which of the following is NOT a type of hazardous waste incinerator?
- Pressurized
- Fixed Hearth
- Fluidized
- Rotary Kiln correct answer: Fixed hearth A solid waste manager is trying to reduce lead in the solid waste stream. What should be targeted in the municipal waste stream as a major contributor of lead to the environment? correct answer: Lead acid batteries To raise the pH add: correct answer: Soda Ash What is the vertical part of the stairs you step on called? correct answer: Riser
Nutrients associated with eutrophication include all of the following EXCEPT:
- Organic (C)
- Nitrogen (N)
- Phosphates
- Potassium (K) correct answer: Potassium (K) An HACCP plan is NOT required when: correct answer: cooling and reheating TCS foods in bulk What type of filter is recommended for use in small communities and rural places? correct answer: slow sand The quantity of liquid bleach (household) used to treat 1, gallons of bacterially contaminated water for drinking is: correct answer: 1 pint What contaminant has been associated with learning and cognitive disorders in children who drink contaminated water? correct answer: Lead The maximum size of a stair riser should be: correct answer: 8' 1/4" The waste water from flushing of a water closet, latrine, or privy, is referred to as: correct answer: Black H2O (water) Aerobic bacteria require all of the following nutrients EXCEPT:
- Carbon (C)
- Phosphorus (P)
turn off the: correct answer: Public Utility services to the building What are the peak seasons for rats to breed in temperate zones? correct answer: Spring and Fall In emergency situations, when the water is turbid or colored but not chemically contaminated, the chlorine dosage should be: correct answer: Doubled The difference between a disaster and terrorism is best described as: correct answer: Intent Chemicals that have been used for pool disinfection include chlorine, chloro-iso-cyanurates, bromine, and: correct answer: I (Iodine) A swimming pool filtration system should filter the entire volume of water at MINIMUM of every: correct answer: 6 hours Due to the large quantity of floating organisms and materials, the gutters or skimmers should receive what MINIMUM percent of the total pool water? correct answer: 60% Approved emergency response plans at nuclear electric power plan sites must be tested AT LEAST every: correct answer: 2 years
Swimming pool water clarity is measured in terms of NTU or Nephelometer Turbity Unity. It is recommended that a level of 0.5 NTU: correct answer: Shall not be exceeded The interval between exposure to an infectious agent and the appearance of the first symptom is called: correct answer: Incubation period An infected organism that does not exhibit symptoms during the spread of an illness is called a: correct answer: Carrier What is the usual mode of infection from Salmonella? correct answer: Ingestion of contaminated food Which one of the following pesticides can be legally used in the United States by the public? correct answer: Diazinon All of the following are used to disinfect water EXCEPT:
- Chlorine (Cl)
- Bromine (Br)
- Iodine (I)
- Fluorine (F) correct answer: Flourine (F) A stud is a unit of building construction that is intended as a: correct answer: vertical support What are agencies that are responsible for protecting food against terrorism? correct answer: *FDA USDA HHS EPA
Bloodborne pathogens are regulated by: correct answer: OSHA ( Occupational Safety Health Administration) Muerto Canyon Virus (MCV) is a Hantavirus mainly carried by: correct answer: Mice Excessive condensation, corrosion, and mildew occur when the relative humidity exceeds_____________ correct answer: 60% Gas chlorine provides: correct answer: 100% available Chlorine (Cl) When Chlorine is added to water: correct answer: An acid is formed To mix acid and water, always: correct answer: Add acid to water The addition of sodium bicarbonate will: correct answer: Raise the pH (raises pH faster than sodaash) Studies indicate that swimmers have a higher overall illness rate over non-swimmers: correct answer: regardless of bathing waterquality One advantage of using cyanuric acid additive is that it: correct answer: stabilizes residual chlorine The recommended and MOST effective method of maintaining pool water quality is: correct answer: continuous recirculation chlorination and filtration
What is the MAXIMUM accumulated time that time/temperature control for safety food can safely be exposed to the temperature danger zone? correct answer: 6 hours What is the source of scombroid poisoning? correct answer: histamines in the muscle of fish The MOST likely cause of photochemical smog is due to: correct answer: Heavy motor vehicle traffic Which component of clean, dry air has the smallest volume? correct answer: Ammonia Which of the following is not a malodorous gas?
- Carbon Monoxide (CO)
- Sulfur Dioxide (SO2)
- Hydrogen Sulfide (H2S)
- Phenol or Carbonic acid (C6H5OH) correct answer: Carbon Monoxide (CO) What is the primary cause of dealth resulting from automobile exhaust accumulation in garages? correct answer: Carbon Monoxide (CO) Long term effects of lead poisoning include: correct answer: learning disabilities The rate of filtration for a vacuum diatomite filter should be: correct answer: 1 to 2 gpm/ft2 gallons per minute per feet square
