RS/ REHS Exam Practice Questions With 100% Correct And Verified Answers, Exams of Advanced Education

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RS/ REHS Exam Practice Questions With

100% Correct And Verified Answers

What is the most common cause of bacterial meningitis in children under five years of age? a) Neisseria meningitides b) Group B Streptococci c) Streptococcus pneumoniae d) Haemophilus influenzae type B - Correct Answer-d) Haemophilus influenzae type B How is "giardiasis" usually transmitted to others? a) Person-to-person transfer of cysts from the feces of the infected individual b) Drinking unfiltered water from streams and lakes c) Drinking unboiled water from streams and lakes d) Drinking inadequately chlorinated water from a municipal water distribution system - Correct Answer-a) Person-to-person transfer of cysts from the feces of the infected individual Which of the following duties of state and local health agencies is focused to protect the public's health and welfare? a) Community-intensive planning b) Statutory administrative action c) Regulatory responsibilities d) Plan implementation - Correct Answer-c) Regulatory responsibilities Which of the following is a measure of the amount of light scattered by particles suspended in a water test sample? a) Formazin Turbidity Units (FTU) b) Nephelometric Turbidity Units (NTU) c) Hydrosyntalic Turbidity Units (HTU) d) Lorcetic Turbidity Units (LTU) - Correct Answer-b) Nephelometric Turbidity Units (NTU) What is an epidemic? a) The constant presence of a disease within a community or region b) The presence of an infectious agent on a body surface c) The presence of infection in a host without clear, recognizable clinical symptoms d) The occurrence in a community or region of cases of an illness clearly in excess of expectancy - Correct Answer-d) The occurrence in a community or region of cases of an illness clearly in excess of expectancy What portal of entry should a field sanitarian protect to avoid contracting Lyme disease? a) Skin b) Respiratory tract

c) Reproductive organs d) Digestive tract - Correct Answer-a) Skin Swimmer's itch is a common name for which of the following diseases? a) Leptospirosis b) Subdural dermatitis c) Schistosomiasis d) Trichiniasis - Correct Answer-c) Schistosomiasis Which of the following factors would least contribute to the emergence of a new infectious disease? a) Human behavior b) Heat disinfection c) Antibiotic use d) Disinfectant use - Correct Answer-b) Heat disinfection Listeriosis is commonly associated with a) contaminated water b) contaminated food c) infected mice d) infected birds - Correct Answer-b) contaminated food Hemolytic Uremic Syndrome is caused by an infection with a) dracunculus medinensis b) staphylococcus aureus c) escherichia coli O157:H d) salmonella typhimurium - Correct Answer-c) escherichia coli O157:H The basic principles of disease control include all of the following except a) lag phase b) control of disease source c) mode of transmission d) understanding susceptibility - Correct Answer-a) lag phase Which one of the following phrases most accurately describes the term endemic? a) sporadic occurrence of an illness b) illnesses that exceed expected levels c) all illnesses present at any one time d) constant presence of an illness - Correct Answer-d) constant presence of an illness The interval between exposure to an infectious agent and the appearance of the first symptom is called the a) transmission period b) susceptible period c) reactive period d) incubation period - Correct Answer-d) incubation period

An environmental health specialist receives a cash payment from a restaurant operator in order to receive a passing restaurant inspection score. This event is known as a) malfeasance b) misfeasance c) nonfeasance d) exclusionary rule - Correct Answer-a) malfeasance An environmental health manager trains environmental health specialists on the operation of environmental probe thermometers. In the interest of time, the manager omits a training section on safe sheathing of the thermometer, and subsequently an environmental health specialist punctures their finger and injures themselves. This is an example of a) malfeasance b) misfeasance c) nonfeasance d) exclusionary rule - Correct Answer-c) nonfeasance An environmental health specialist informs vector control staff to perform "landing counts" on their skin in a known mosquito breeding ground which is confirmed to be positive with West Nile virus. This is an example of a) malfeasance b) misfeasance c) nonfeasance d) exclusionary rule - Correct Answer-b) misfeasance Vehicleborne, vectorborne, or airborne are all examples of: a) indirect mode of transmission b) direct mode of transmission c) hosts d) life cycle sequences - Correct Answer-a) indirect mode of transmission An employer is held liable for the torts of its employees committed within the scope of their employment. This is referred to as: a) respondeat superior b) parens patriae c) substituted judgement d) corporate privilege - Correct Answer-a) respondeat superior Performance of an authorized act in an unauthorized manner is called a) nonfeasance b) misfeasance c) malfeasance d) disfeasance - Correct Answer-b) misfeasance

An action authorized by law to restrict or prevent the movement of goods for the protection of public health, safety and welfare is called an order of a) injunction b) withholding c) embargo d) seizure - Correct Answer-c) embargo What is the federal agency that regulates food additives? a) CDC b) Consumer Product Safety Commission (CPSC) c) Department of Agriculture d) Food and Drug Administration - Correct Answer-d) Food and Drug Administration When a legal action is being prepared, one of the first steps a sanitarian should take is to: a) obtain a warrant b) obtain a court order c) keep accurate records d) check with other agencies - Correct Answer-c) keep accurate records How is the term "contamination" defined when used in connection with a communicable disease? a) infection of an individual or animal with pathogenic organisms b) presence of pathogenic agents on a surface, article, or substance c) transfer of a vector, regardless of time or the nature of the host d) contact between two or more sources of infection - Correct Answer-b) presence of pathogenic agents on a surface, article, or substance What is the most common contributing factor to foodborne illness? a) insect and rodent infestations b) dirty equipment c) incorrect labeling of containers d) improper holding temperatures - Correct Answer-d) improper holding temperatures Why are some foods classified as time/temperature control for safety? a) they have a pH below 4. b) they have a water activity below 0. c) they support rapid growth of pathogenic microorganisms d) they require rapid and thorough cooking - Correct Answer-c) they support rapid growth of pathogenic microorganisms Which food does not require refrigeration at 41F (5C)? a) open container of garlic in oil b) tofu c) sliced/cut cantaloupe d) UHT creamers - Correct Answer-d) UHT creamers

What is the best means of inhibiting the growth of microorganisms in fresh meat? a) topical use of approved hypochlorite solutions b) exposure to ultraviolet light for 30 minutes c) chemical preservatives d) adequate refrigeration and cleanliness - Correct Answer-d) adequate refrigeration and cleanliness What is the maximum accumulated time that time/temperature control for safety food can safely be exposed to the temperature danger zone? a) 2 hours b) 4 hours c) 6 hours d) 8 hours - Correct Answer-c) 6 hours If time only is used as a public health control, the maximum period of time recommended by the FDA for time/temperature control for safety food to be held is: a) 2 hours b) 4 hours if the warmest part of the food item does not exceed 120F c) 6 hours if the warmest part of the food item does not exceed 70F d) this public health control is never permitted - Correct Answer-c) 6 hours if the warmest part of the food item does not exceed 70F What is the minimum period that the FDA recommends employees wash their hands and arms up to the elbow? a) 10 seconds b) 20 seconds c) 30 seconds d) 40 seconds - Correct Answer-b) 20 seconds Unpasteurized eggs not intended for immediate service should be cooked to a) 165F for 15 secs b) 155F for 15 secs c) 145F for 15 secs d) 140F for one minute - Correct Answer-b) 155F for 15 secs What is the usual mode of infection from Salmonella? a) ingestion of contaminated food b) ingestion of contaminated water c) contact with an active case d) contact with fomites - Correct Answer-a) ingestion of contaminated food What is the source of scombroid poisoning? a) Histamines in the muscle of fish b) Sprouted green potatoes c) Undercooked pork

d) Rice contaminated with rodent feces - Correct Answer-a) Histamines in the muscle of fish All the following are signs of spoiled fish except: a) strong odor b) elastic flesh c) gray gills d) sunken eyes - Correct Answer-b) elastic flesh Which of the following shellfish is most likely to cause illness? a) oysters b) crabs c) shrimp d) scallops - Correct Answer-a) oysters The laboratory reports a positive coliform test that exceeds permissible limits on a bottle of pasteurized milk. What does this indicate? a) improper bactericidal treatment of the equipment b) improper virucidal treatment of the equipment c) a contaminated water supply d) a contaminated food supply - Correct Answer-a) improper bactericidal treatment of the equipment What is the most effective practice for preventing trichinosis in people? a) be certain that ground meat is freshly ground at the time of purchase b) be sure that fresh pork is thoroughly cooked c) avoid the consumption of ground meat products d) cook steak until well done - Correct Answer-b) be sure that fresh pork is thoroughly cooked A HACCP plan is not required when a) smoking foods as a method of preservation b) cooling and reheating TCS foods in bulk c) performing reduced oxygen packaging d) using food additives or adding other components to preserve food or render it non- TCS - Correct Answer-b) cooling and reheating TCS foods in bulk What should not be done with food samples collected during a foodborne illness investigation? a) refrigerate b) freeze c) seal d) label - Correct Answer-b) freeze What is the primary requirement in designing a food service facility? a) durability

b) cleanability c) appearance d) convenience - Correct Answer-b) cleanability What is the most important rule of food storage? a) follow the "first in, first out" rule b) store products in order of "pull by" date c) repackage dry foods into metal containers d) store canned goods under refrigeration - Correct Answer-a) follow the "first in, first out" rule Insecticides/pesticides may be stored in all ways except: a) in a metal locked cabinet b) on the lowest shelf in the storage room c) above the dishwashing sinks d) in the basement separate from food and other chemicals - Correct Answer-c) above the dishwashing sinks What type of well is considered LEAST likely to become contaminated? a) drilled b) bored c) driven d) dug - Correct Answer-a) drilled Diatomaceous earth filters a) should be supplemented by a chlorination system b) should be integrated into a rapid sand filtration system c) can be used for a public water treatment system d) can be used in a public sewer treatment system - Correct Answer-a) should be supplemented by a chlorination system Microbial pollution travels only a short distance through: a) sandstone b) smooth clay c) fissured rock d) limestone - Correct Answer-b) smooth clay What type of filter is recommended for use in small communities and rural places? a) diatomaceous earth b) granular c) cartridge d) slow sand - Correct Answer-d) slow sand All of the following are used to disinfect water except: a) chlorine b) bromine

c) fluorine d) iodine - Correct Answer-c) fluorine Backsiphonage may be prevented by all of the following methods except: a) hydrostatic loops b) vacuum breakers c) air gap separation d) backpressure units - Correct Answer-a) hydrostatic loops Which of the following is the least effective method for cadmium removal from drinking water? a) activated carbon b) iron coagulation c) lime softening d) ion exchange - Correct Answer-a) activated carbon Before a drinking water sample is taken, the sampling tap should be clean, free of leaks, and flushed for how long? a) 1 to 1 1/2 minutes b) 2 to 3 minutes c) 4 to 5 minutes d) 6 to 7 minutes - Correct Answer-b) 2 to 3 minutes What contaminant has been associated with learning and cognitive disorders in children who drink contaminated water? a) Manganese b) Copper c) Lead d) Parathion - Correct Answer-c) lead The wastewater from the flushing of a water closet, latrine, or privy is referred to as a) gray water b) black water c) green water d) brown water - Correct Answer-b) black water If a septic tank is pumped during a wet period, the a) water may flow into the tank b) field may flood the tank c) tank may float out of the ground d) tank may be crushed by the wet earth - Correct Answer-c) tank may float out of the ground Nutrients associated with eutrophication include all of the following except a) organic carbon b) potassium

c) nitrogen d) phosphates - Correct Answer-b) potassium Which of the following is least important when reducing sewage to gases? a) anaerobic bacteria b) earthworms c) protozoa d) aerobic bacteria - Correct Answer-b) earthworms A septic tank maintenance worker has checked an empty tank for the presence of hydrogen sulfide (H2S). The test was negative, and there are no odors indicating the presence of other hazardous gases. Is the tank safe to enter without a respirator and supplied air? a) Yes, because hydrogen sulfide and odors were not detected b) No, because oxygen content and methane were not tested c) Yes, because the absence of odors and H2S indicates acceptable confined space entry conditions d) No, because a lack of H2S is a sign of a hazardous confined space atmosphere - Correct Answer-b) No, because oxygen content and methane were not tested All of the following are true about ozone as a disinfectant except which one? a) nontoxic to aquatic organisms b) source of dissolved oxygen c) excellent viricide d) long-lasting residual - Correct Answer-d) long-lasting residual Aerobic bacteria require all of the following nutrients except a) carbon b) magnesium c) phosphorus d) nitrogen - Correct Answer-b) magnesium What does a mottled brown and red soil indicate? a) unsuitability for absorption due to chemical composition b) suitability for absorption due to granular structure c) inadequate aeration methods d) adequate agglomeration - Correct Answer-c) inadequate aeration methods Alternative small wastewater treatment systems are considered UNLESS: a) impervious formations are found at a depth of 10 feet b) space is limited and surface water supplies are inadequate c) highly porous formations exist d) high groundwater exists - Correct Answer-a) impervious formations are found at a depth of 10 feet

Lime coagulation, mixed media filtration, and activated carbon filtration will greatly reduce: a) heavy metals b) biological contaminants c) EPA priority pollutants d) EPA listed hazardous wastes - Correct Answer-c) EPA priority pollutants It is known that some common pathogenic organisms found in wastewater will survive more than ____ of harsh temperature extremes. a) 2 months b) 5 months c) 2 years d) 5 years - Correct Answer-c) 2 years A storm sewer is used to a) remove rain and other standing surface water b) remove sewage and storm water c) remove household water waste and gutter drain water d) remove non-toxic, non-hazardous wastewater - Correct Answer-a) remove rain and other standing surface water Stream pollution is sometimes apparent by a) increased levels of available oxygen in the water b) a zone of degradation c) large numbers of crayfish and cristivomer species d) large numbers of small fish - Correct Answer-b) a zone of degradation A young lake is considered to be a) eutrophic b) mesotrophic c) oligotrophic d) ohytotrophic - Correct Answer-c) oligotrophic If the septic tank will also have a garbage disposal unit feeding into it, the a) size of the tank should be increased by 50% b) tank should have an agitator c) tank should not be equipped with a gas baffle d) tank should not be constructed with precast concrete - Correct Answer-a) size of the tank should be increased by 50% Sludge accumulation in a tank serving a normal home has been estimated at a) 40 to 50 liters per person per year b) 69 to 80 gals per person per year c) 18 to 21 gals per person per year d) 2.2 gals per person per year - Correct Answer-c) 18 to 21 gals per person per year

How often should a septic tank for a private home be serviced? a) every year b) every 5-10 years c) every 3-5 years d) every 10 years - Correct Answer-c) every 3-5 years Human disease from aerosols of wastewater: a) are related primarily to wastewater treatment by the activated sludge, trickling filter, and spray irrigation processes b) has been demonstrated from pathogens recovered in aerosols from the spray irrigation of treated wastewater c) may be caused by very small numbers of organisms d) is a hazard even to those who have had subclinical infection, and thus should have been immunized - Correct Answer-a) are related primarily to wastewater treatment by the activated sludge, trickling filter, and spray irrigation processes 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: a) nitrates b) iron c) cadmium d) chlorides - Correct Answer-c) cadmium After the servicing (pumping) of a septic tank, it is essential that the tank and lid be: a) cleaned with a bleach or chlorine product b) scrubbed to remove hardened sludge c) recolonized with a commercial biological product containing yeast d) replaced and secured for safety purposes - Correct Answer-d) replaced and secured for safety purposes According to the Resource Conservation and Recovery Act (RCRA) how must hazardous household waste be disposed? a) Household hazardous waste is exempt from RCRA requirements b) It must be disposed as a hazardous waste by a professional hazardous waste company c) It must be incinerated d) It may be disposed in a storm drain or sanitary sewer - Correct Answer-a) Household hazardous waste is exempt from RCRA requirements The grinding of garbage is an acceptable method of a) garbage disposal b) volume reduction c) wet oxidation d) energy recovery - Correct Answer-a) garbage disposal

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? a) fluorescent light tubes b) lead acid batteries c) household batteries d) rechargeable batteries - Correct Answer-b) lead acid batteries All of the following are considered advantages of using the "shredded solid waste" landfill method except a) it does not cause odors b) it may require daily earth cover c) it will readily absorb precipitation d) it reduces insect breeding - Correct Answer-c) it will readily absorb precipitation The BEST sanitary landfill method for a location with rolling terrain is the: a) low-area method b) valley or ravine area method c) trench method d) area or ramp method - Correct Answer-d) area or ramp method Why is it important for a business that generates hazardous waste to deal only with licensed disposal companies that have a good compliance history? a) large companies with good compliance history generally have deep pockets b) once the hazardous waste disposal company picks up the waste, it becomes the responsible party c) the business is held accountable for where and how the hazardous waste generated is disposed of d) it is important only if the business generates 220 pounds or more per month hazardous waste - Correct Answer-c) the business is held accountable for where and how the hazardous waste generated is disposed of Which of the following is not a type of hazardous waste incinerator? a) pressurized b) fluidized c) fixed hearth d) rotary kiln - Correct Answer-a) pressurized Which federal law regulates underground storage tanks for hazardous wastes? a) Clean Water Act b) Federal Water Pollution Control Act c) Resource Conservation and Recovery Act d) Solid Waste Disposal Act - Correct Answer-c) Resource Conservation and Recovery Act

A measure of the probability and severity of adverse effects under specific conditions best describes a) risk b) hazard c) exposure d) toxicity - Correct Answer-a) risk Which of the following sampling devices is best for collecting undisturbed soil samples? a) auger b) Shelby tube c) split spoon d) Veihmeyer rod - Correct Answer-c) split spoon What is the term for a statistical estimate of an oral dose of a chemical that produces a lethal effect on half of an animal population? a) LC b) LD c) EC d) ED50 - Correct Answer-b) LD The dose-response relationship of a toxic substance depends on all of the following except the a) amount and concentration of the substance b) pH of the substance c) duration of exposure to the substance d) toxicity of the substance - Correct Answer-b) pH of the substance Which respiratory device provides the best protection? a) positive pressure respirator with a full-face piece b) negative pressure respirator with a full-face piece c) full-face canister respirator d) half-face respirator - Correct Answer-a) positive pressure respirator with a full-face piece The Emergency Planning and Community Right-to-Know Act (SARA Title III) requires the disclosure of all of the following except type and quantities of a) chemicals produced on site b) chemicals accidentally discharged into the atmosphere c) chemicals routinely discharged into the atmosphere d) all chemicals routinely discharged into the atmosphere - Correct Answer-d) all chemicals routinely discharged into the atmosphere For first responders at an incident, which one of the following is listed correctly according to order of importance? a) responder safety, environmental safety, public safety, property protection b) public safety, property protection, responder safety, environmental safety

c) responder safety, public safety, environmental safety, property protection d) property protection, public safety, responder safety, environmental safety - Correct Answer-c) responder safety, public safety, environmental safety, property protection The agent of Lyme disease is transmitted by a) dog ticks b) fleas c) deer or 'black-legged' ticks d) mosquitos - Correct Answer-c) deer or 'black-legged' ticks Select the best public health strategy to abate a current outbreak of rickettsialpox (transmitted by rat-associated mites)? a) deploy rodenticides b) improve sanitation to deny rats food c) conduct active surveillance to find infected people and ensure they are treated to prevent ongoing transmission d) apply acaricides prior to suppressing rat abundance - Correct Answer-d) apply acaricides prior to suppressing rat abundance When is it most reasonable to treat a dwelling for a bed bug problem? a) only after living bed bug has been positively confirmed on the premises b) after an occupant reports suffering from bites or irritation c) anytime as a preventative strategy d) after discovering one or more small furry caterpillar-like creatures on the bed linens or mattress - Correct Answer-a) only after living bed bug has been positively confirmed on the premises Poison ivy, poison oak, and poison sumac are most usually best managed by a) pulling out the plants with bare hands b) burning the plants c) treating them with an herbicide d) using a chainsaw or string trimmer - Correct Answer-c) treating them with an herbicide To reduce transmission risk of West Nile virus, which strategy is not appropriate? a) ensuring window screens are in place and in good condition b) empty water from buckets and other open containers c) treating catch basins with EPA-registered mosquito larvicides d) applying motor oil to catch basins and ponds - Correct Answer-d) applying motor oil to catch basins and ponds Persons suffering allergic symptoms in the home during all seasons of the year might most likely be reacting to allergens from a) plaster b) pollen c) food

d) cockroaches - Correct Answer-d) cockroaches Which of the following is most effective for controlling ragweed? a) fenthion b) dieldrin c) 2,4-D d) petroleum oil - Correct Answer-c) 2,4-D The interval between exposure to an infectious agent and the appearance of the first symptom is called the a) lag time b) susceptible period c) incubation period d) primary period - Correct Answer-c) incubation period Which of the following statements is most correct? Head lice a) is spread mainly by shared fomites (combs, brushes, hats) b) are acquired mainly by direct and prolonged head-to-head contact c) on a child is a reasonable sign of parental neglect d) should cause an infested child to be quarantined or isolated - Correct Answer-b) are acquired mainly by direct and prolonged head-to-head contact A disease that might result from inhaling dust from bird droppings is a) dengue fever b) psittacosis c) tularemia d) murine typhus - Correct Answer-b) psittacosis Rodent populations in a food production or service facility are best kept low by: a) maintaining cats inside b) improving sanitation and securing foods c) deploying rodent traps at 10-foot intervals along the interior walls d) placing piles of rodenticides in the corners of rooms and beneath shelves where rodents hide - Correct Answer-b) improving sanitation and securing foods The killing of an infectious agent outside the body by chemical or physical means termed a) detoxification b) deodorization c) destabilization d) disinfection - Correct Answer-d) disinfection When would pesticides be considered in an Integrated Pest Management program? a) as a first choice b) as the last option c) never

d) anytime they might be appropriate to reaching the goals of the program - Correct Answer-d) anytime they might be appropriate to reaching the goals of the program What is the best option when a bat is found in a room with a sleeping infant? a) capture the bat alive and consider having it tested for rabies virus b) kill the bat and dispose of the carcass c) open the window and chase it outside d) advise the caregivers to have the child treated according to a post-exposure rabies vaccine protocol - Correct Answer-a) capture the bat alive and consider having it tested for rabies virus The term rad means a) required administered dose b) radiation admitted dose c) roentgen absorbed dose d) radiation absorbed dose - Correct Answer-d) radiation absorbed dose 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? a) X-rays b) alpha particles c) beta particles d) gamma rays - Correct Answer-b) alpha particles Beta radiation is most commonly blocked by which one of the following materials? a) lead b) concrete c) magnesium alloy d) glass or plastic - Correct Answer-d) glass or plastic Microwaves are reflected by a) metals b) plastic c) glass d) polymers - Correct Answer-a) metals The energy of ionizing radiation is measured in a) ergs of energy per gram b) one electrostatic unit c) electron volts (eV) d) one-person sievert (Sv) - Correct Answer-c) electron volts (eV) The term "frequency" cannot be described as a) waves b) particles

c) vibrations d) oscillations - Correct Answer-b) particles The shorter the wavelength, the a) higher the frequency and lower the energy b) lower the frequency and energy c) lower the frequency and higher the energy d) higher the frequency and energy - Correct Answer-d) higher the frequency and energy The roentgen is a measure of the ionization in air produced by exposure to a) x-rays or gamma rays b) alpha particles c) beta particles d) all of the above - Correct Answer-a) x-rays or gamma rays The principles of shielding are represented by which three methods? a) sensitivity, selectivity, dose b) distance, atomic number, mass c) time, distance, and shielding d) alpha, beta, and gamma - Correct Answer-c) time, distance, and shielding The term "rem" is short for a) roentgen energy measure b) roentgen equivalent measure c) radiation energy measure d) none of the above - Correct Answer-d) none of the above Which term is used to show the exposure of large populations to low-level radiation? a) person-rem b) gamma-rem c) radiation-rem d) quantum-rem - Correct Answer-a) person-rem The rate at which atoms of radioactive sources (radionuclides) disintegrate are measured in a) rems b) rods c) curies d) roentgens - Correct Answer-c) curies Isotopes of the same element have a) the same mass number but different atomic numbers b) the same atomic number but different mass numbers c) different atomic and mass numbers

d) the same atomic and mass numbers - Correct Answer-b) the same atomic number but different mass numbers The half-value layer represents a) the time needed for radiation exposure to decrease by 50% b) the best type of shielding c) that 50% of radiation is reflected by metal d) the thickness of a particular shield that decreases exposure by 50% - Correct Answer-d) the thickness of a particular shield that decreases exposure by 50% What is the danger and/or hazard posed by an etiological agent? a) corrosive reaction b) asphyxiation c) human disease d) allergic reaction - Correct Answer-c) human disease No person should be permitted to work in a trench or pit in sandy clay soil that has unsupported sides or banks higher than: a) 2 ft b) 3 ft c) 4 ft d) 5 ft - Correct Answer-d) 5 ft An employer moves employees who have reached the upper permissible level of exposure to a hazardous environment, to prevent further exposure. What type of hazard control is this? a) professional control b) personal control c) administrative control d) engineering control - Correct Answer-c) administrative control A negative pressure fit test for a protective mask a) is done by placing both palms against the intake filters b) is done by placing both hands over the exhalation points c) should be conducted at a minimum of once a week d) should be repeated until an air leak is detected - Correct Answer-a) is done by placing both palms against the intake filters Quantitative risk assessments usually measure human exposure through all the following except a) computer models b) blood or urine analyses c) personal surveys d) toxicological analysis - Correct Answer-a) computer models The most likely cause of photochemical smog is due to

a) large industries b) chemical processing plants c) hazardous waste incinerators d) heavy motor vehicle traffic - Correct Answer-d) heavy motor vehicle traffic The industries LEAST likely to be a source of sulfur dioxide pollution are: a) Metal smelters b) Coal and oil burning power plants c) Refineries d) Hazardous waste incinerators - Correct Answer-d) Hazardous waste incinerators Scrubbers are wet collectors generally used to remove particles that form as a a) dust, aerosol, or fog b) mist, solid, or vapor c) fog, mist, or dust d) fume, dust, or mist - Correct Answer-c) fog, mist, or dust Particle size inlets are used to separate particles above and below 2 to 3 microns in size on a) high-volume samplers b) outfall vacuums c) baghouse air filters d) atmospheric respirator sieves - Correct Answer-a) high-volume samplers The most common type of noise measurement device used for initial inspections is the a) octave-band analyzer b) noise dosimeter c) sound level meter d) sound analyzer - Correct Answer-c) sound level meter When two pollutants are combined, the effects are greater than the sum of the individual effects. This is called: a) commensalisms b) synergism c) magnification d) multiplication - Correct Answer-b) synergism Air is vital to existence. In fact, in a day's time humans breathe an average of: a) 3 to 4 pounds of air b) 35 pounds of air c) 37 pounds of air d) 1600 cubic ft of air - Correct Answer-b) 35 pounds of air Which component of clean, dry air has the smallest volume? a) carbon monoxide b) nitrogen dioxide

c) ammonia d) sulfur dioxide - Correct Answer-d) sulfur dioxide Ozone reduces the useful life of all the following except: a) rubber b) textiles c) dyes d) nylons - Correct Answer-d) nylons Major effects on humans are caused by Los Angeles-type smog, comprised of what two main 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-a) sulfur dioxide and hydrogen fluoride Photochemical smog has been reported in congested areas with a) large industries b) chemical processing plants c) industries processing hazardous wastes d) high motor vehicle traffic - Correct Answer-d) high motor vehicle traffic What type of air pollution causes bleaching of leaves in plants? a) PAN b) sulfur dioxide c) industries processing hazardous wastes d) high motor vehicle traffic - Correct Answer-b) sulfur dioxide Which of the following are not major sources of sulfur dioxide pollution? a) metal smelters b) coal and oil burning plants c) refineries d) electrical substations - Correct Answer-d) electrical substations Which of the following is not a malodorous gas? a) sulfur dioxide b) hydrogen sulfide c) carbon monoxide d) phenol - Correct Answer-c) carbon monoxide What size particle can reach the lowest parts of the lung? a) 15 microns b) 50 microns c) 3 microns d) any size particles - Correct Answer-c) 3 microns

The three tiny bones contained in the middle ear are? a) incus, malleus, and stapes b) ulna, radius, stapes c) femur, phalanges, and metatarsal d) incus, radius, and xyloid - Correct Answer-a) incus, malleus, and stapes _____ is defined as noise induced hearing loss attributed to environmental noise? a) presbycusis b) tinnitus c) cochlea d) socioacusis - Correct Answer-d) socioacusis Choose the physiological effect of excessive exposure to chronic noise or exposure to very loud impact noise? a) sleep disturbance b) hearing loss c) loss of concentration d) loneliness - Correct Answer-b) hearing loss Vent gases from a coal burning furnace 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-d) sulfuric acid What is the primary cause of death resulting from automobile exhaust accumulation in garages? a) methane b) ethylene dioxide c) carbon monoxide d) tetraethyl lead - Correct Answer-c) carbon monoxide The end of a waste pipe should terminate below the rim of a sink directly connected to the drainage system by at least a) 2 inches b) 4 inches c) 5 inches d) 6 inches - Correct Answer-a) 2 inches The most common type of injury in a home is a) a fall b) asphyxiation c) tripping d) an animal bite - Correct Answer-a) a fall

A "S" trap is not considered legal in most state plumbing codes due to which of the following factors? a) they clog easily b) they are not vented c) they are unsightly d) they do not drain - Correct Answer-b) they are not vented Which of the following products is not a traditional formaldehyde air pollution source? a) cosmetics b) burning vegetation c) particle board d) computer emissions - Correct Answer-b) burning vegetation Long term effects of lead poisoning include a) learning disabilities b) severe acne c) loss of large motor skills d) adult diabetes - Correct Answer-a) learning disabilities A stud is an element of building construction that is intended as a a) vertical support b) horizontal support c) roof only support d) support for sheet rock - Correct Answer-a) vertical support A joist is used a) to provide bracing for a wall b) as a horizontal support c) as a roof only support d) as a support for sheet rock - Correct Answer-b) as a horizontal support A footing drain is required to a) control moisture b) eliminate radon c) keep a foundation from slipping d) keep the feet dry while pouring concrete - Correct Answer-c) keep a foundation from slipping The chimney of the home of the house should be a minimum of ____ above the highest structure of the home. a) 5 feet b) 3 feet c) 18 inches d) level with the eve of the house - Correct Answer-b) 3 feet What is the horizontal element of a stairway called?

a) riser b) tread c) step d) footer - Correct Answer-b) tread What is the vertical element of a stairway called? a) riser b) tread c) step d) footer - Correct Answer-a) riser When footings fail this often results in a) leaky roofs b) warped studs c) twisted joint d) cracked and/or displaced foundations - Correct Answer-d) cracked and/or displaced foundations A 6-mil vapor retarder should be installed below any slab-on-grade foundation or crawlspace of the home to: a) control moisture in the crawlspace b) keep natural gas out of the crawlspace c) keep underground springs from washing away footers d) keep insects from eating the wood structure - Correct Answer-a) control moisture in the crawlspace The footing drain is intended to drain water away from the base of the home to: a) prevent damage to the footing and foundation b) keep the concrete from dissolving c) control termites d) control mold on the footer - Correct Answer-a) prevent damage to the footing and foundation The termite shield is placed between the a) foundation and the sill b) footer and the foundation c) joist and the header d) stud and the header - Correct Answer-a) foundation and the sill The maximum size of a stair riser should be a) 8-1/4" b) 12" c) 6" d) 10-1/4" - Correct Answer-a) 8-1/4"

What is the ASHRAE-recommended minimal thermal standard for dwellings at 40% humidity and an air circulation rate of 45fpm? a) 57F b) 60F c) 68F d) 76F - Correct Answer-d) 76F The distance between the end of the water supply pipe and the sink should be how many times the diameter of the supply pipe? a) 1.5 b) 2 c) 3 d) 4 - Correct Answer-b) 2 Excessive condensation, corrosion, and mildew can occur when relative humidity exceeds a) 20% b) 40% c) 60% d) 80% - Correct Answer-c) 60% Nosocomial infections are a recurring problem in a) food establishments b) health care facilities c) swimming pools d) health spas - Correct Answer-b) health care facilities Minimum wash water temperature in a hospital laundry is a) 146 to 150F b) 160 to 167F c) 170 to 178F d) 185 to 196F - Correct Answer-b) 160 to 167F A biohazard is a) any material that negatively impacts a biological organism b) a material of biological composition, especially if infective, that constitutes a threat to people or their environment c) a chemical that constitutes a threat to people or their environment d) any virus that causes fatal disease - Correct Answer-b) a material of biological composition, especially if infective, that constitutes a threat to people or their environment Bloodborne pathogens are regulated by a) OSHA b) FDA c) CPSC

d) HHS - Correct Answer-a) OSHA Hantavirus is a virus mainly carried by a) deer b) sheep c) mice d) gophers - Correct Answer-c) mice Hantavirus causes a disease that destroys what primary organ in humans? a) lungs b) kidneys c) liver d) brain - Correct Answer-a) lungs The incidence of tuberculosis in English laboratory workers working with M. tuberculosis was reported to be how many times higher than the general population? a) 2 times b) 3 times c) 5 times d) 10 times - Correct Answer-c) 5 times The term "universal precautions" refers to a) specific respiratory protection used in hospitals b) an infection control program regulating the handling of blood and certain bodily fluids c) personal and environmental protection procedures used when handling hazardous chemical wastes d) precautions to be used when collecting samples for potential litigation - Correct Answer-b) an infection control program regulating the handling of blood and certain bodily fluids The biosafety containment level suitable for work involving agents of moderate potential hazard to personnel and the environment is a) BSL 1 b) BSL 2 c) BSL 3 d) BSL 4 - Correct Answer-b) BSL 2 Biological safety equipment includes a) biosafety cabinets b) needles and syringes c) hazardous chemicals d) technical manuals - Correct Answer-d) technical manuals The three biosafety containment levels consist of a combination of a) laboratory practices, safety equipment, and lab design b) lab techniques, research protocols, and safety equipment