REHS Sample Questions
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| show | Encephalitis
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| show | Culiseta species mosquito; Viral
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| show | Culex species mosquito
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| show | Lyme Disease(meningopolyneuritis);Wound: red spot or bump expanding annularly to ring/bulls eye pattern from tick bite(vector found on Deer, wild rodents); Incubation: 3 to 32 days; fever, fatigue, headache, chronic stiff/painful muscles & joints
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| What is the primary vector, reservoir & incubation period for Yellow Fever? | show 🗑
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| What are the primary vectors for Endemic (Murine) Typhus, Epidemic Typhus, and Scrub Typhus? | show 🗑
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| Name the specific agent responsible for Endemic Typhus, Epidemic Typhus, and Scrub Typhus. | show 🗑
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| Which vertebrates can transmit rabies to human? Which 2 species are the most important reservoir hosts? What is typical incubation in humans? | show 🗑
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| What is the bird dieases that affects man? | show 🗑
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| What does a positive blue ring test in milk indicate? | show 🗑
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| What disease is commonly contracted by veterinarians and workers who handle animal hides and animal hair/wool? Name the agent,it's characteristics, & othr resvr. | show 🗑
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| show | Plasmodium falciparum (more dangerous), P. vivax, P. malariae, P. ovale
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| Name the spirochete responsible for causing Lyme Disease. What is the primary vector for this disease? | show 🗑
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| show | Borrelia hermsi; Ornithodoros hermsi (soft-bodied tick)
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| What part of the body does Typhoid Fever affect? | show 🗑
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| show | Leptospirosis
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| show | Skin (e.g. walking barefoot)
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| What disease is caused by the black fly? | show 🗑
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| What are some fecal-oral transmitted diseases? | show 🗑
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| show | Alpha Radiation
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| show | Microwave Radiation
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| What is used to raise the pH of swimming pools? | show 🗑
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| What type of bonds do hydrocarbons consist of? | show 🗑
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| show | Frequency and Duration
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| show | DEV (Duck embryo vaccine), or RIG (Rabies Immune Globulin); An injection in the abdomen for 14 consecutive days.
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| show | Microwaves, but heat injuries from microwave radiation can only be caused by exposure to large amounts of microwave radiation, much more than you would get from a household microwave.
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| What disease may result if small particles are inhaled from grindings? | show 🗑
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| In regards to USTs, what is the purpose of interstitial monitoring? | show 🗑
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| show | 24 hours
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| An automatic shut-off device must stop the flow into the UST when _____ | show 🗑
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| All UST facilities in the state of CA were required to identify in writing a Designated Operator by what date? | show 🗑
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| show | December 31, 2003
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| Define "Underground Storage Tank" | show 🗑
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| How do microwave ovens work? | show 🗑
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| Per Cal Code, lighting in the food prep area is required to have a minimum of ____ . | show 🗑
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| Per Cal Code, lighting for cleaning activities is required at a minimum of ____. | show 🗑
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| What does good visibility depend on? | show 🗑
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| Define specular reflection. Too much specular reflection causes what? | show 🗑
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| show | Sharp, dense shadows produced by light from a strong direct source (e.g. sun).
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| show | Light, such as reflected light from a light colored wall, which produces soft shadows.
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| show | Light, such as an overcast or cloudy day, which produces little to no shadows.
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| Direct lighting | show 🗑
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| Direct-Indirect lighting | show 🗑
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| Indirect lighting | show 🗑
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| show | 60% to 90% of the light is directed to the ceiling and the upper walls, while dense diffusing glass allows some of the light to pass through indirectly downwards.
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| What type of lighting is best for studying purposes? | show 🗑
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| What type of lighting is best for the work environment? | show 🗑
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| show | A high voltage electric current goes through a mercury vapor and produces an arc. The arcing produces UV light from the mercury vapor and the UV light excites the fluorescent chemicals which coat the inside of the tube producing the light.
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| How do fluorescent lights benefit the air quality? | show 🗑
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| What is the leading cause of accidental death? | show 🗑
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| show | Falls
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| show | Fire and Explosion
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| show | Cold Stress, Frostbite, and Hypothermia
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| Define high altitude. | show 🗑
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| show | The result of long, extreme exposure to the sun, in which a person does not sweat enough to lower body temperature.
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| show | The result of prolonged exercise in the heat without salt replacement. Musclar pains or spasms due to loss of salt from the body via sweating or due to inadequate intake of salt.
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| show | A response to heat due to inadequate intake of water to compensate for loss of fluids via sweating.
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| What is the minimum distance downstream from a sewage out fall? | show 🗑
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| show | 200 feet
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| What condition is caused by too much pool disinfectant (e.g. chlorine) in the water? | show 🗑
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| show | GI Disturbances, Typhoid, Dysentery, Leptospirosis, Giardia, Crypto, Ringworm, Schistosomiasis, and URIs.
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| What is the most important factor to consider at a bathing beach? | show 🗑
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| How often should a public pool's filtration system recirculate the water in the pool? | show 🗑
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| What is the most common pool filtration element used today? | show 🗑
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| What is the best chlorine for pools? | show 🗑
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| show | 1.0 ppm (or greater)
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| show | 0.4 to 1.0 ppm
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| show | This could result in the production of chloramines.
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| show | Composed of waste product (e.g. ammonia or organic nitrogen); Formed when Cl combines w/ nitrogen or ammonia from urine, sweat, suntan oil, etc; Causes eye/skin irritation; The "Cl" smell is caused by chloramines; aka "combined available chlorine".
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| What is the ideal pH range for a pool? | show 🗑
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| show | Sodium Carbonate (aka. soda ash)
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| What can you add to a high alkaline pool in order to lower the pH? | show 🗑
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| What chemical is used to neutralize chlorine? | show 🗑
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| When exposed to the UV rays of the sun, the free chlorine in the pool water will break down and escape.What chemical is used to stablize chlorine? | show 🗑
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| show | 1. Ortho Test (orthotoluidene); 2. DPD Test (preferred), (diethylphenolindiamine)
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| show | 4 ft.
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| show | The outlet pressure should not be reduced to more than a 10 psi difference. When this pressure difference is reached, the DE filter is clogged and backwashing is required to eliminate the residual waste collected on the filter.
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| Which form of chlorine is the most effective for killing bacteria and disinfecting the pool water? | show 🗑
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| Define "Free Available Chlorine". | show 🗑
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| What happens when HOCl combines with impurities in the water? | show 🗑
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| show | Total Dissolved Solids; the measure of the total amount of dissolved material in the water.
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| What factors could influence the TDS level in a pool? | show 🗑
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| show | Since Crypto oocysts are resistant to normal Cl treatment, the filtration system must be capable of removing the oocyst. In this situation, the Crypto outbreak was most likely due to a clogged or broken filtration system (e.g. DE filter).
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| What does reddish-brown water in a swimming pool indicate? | show 🗑
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| show | Manganese. Brown water could also indicate algae growth.
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| What does blue-green water in a swimming pool indicate? | show 🗑
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| Bottles used to sample chlorinated water must be treated with what chemical first? | show 🗑
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| When is a lifeguard service required for a public swimming pool? | show 🗑
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| What is the maximum water depth for a public wading pool? | show 🗑
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| show | 1 bather for every 10 square feet of pool water surface area; Surface area of the spa/10.
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| show | 1 bather for every 20 square feet of pool water surface area; Surface area of the pool/20.
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| What is the occupant capacity for a wading pool? | show 🗑
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| show | A device installed in the wall of a pool that is connected to the suction line of the pump. The suction pulls in water and floating contaminants.
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| show | When shock treating, the goal is to reach a high enough level of free Cl to break apart all molecular bonds; specifically the chloramines. Adding enough Cl to achieve this is called breakpoint chlorination. Cl added after that point = free available Cl.
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| What methods are used to destroy chloramines? | show 🗑
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| Define "TOTAL CHLORINE". | show 🗑
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| show | The combination, clumping, or coagulation of suspended particles so that they form small clumps or "lumps" (called floc).
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| Define "HARD WATER". | show 🗑
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| show | (aka Stablized Cl); A group of chlorine pool sanitizers that contain stabilizer (cyanuric acid or isocyanuric acid) to protect the chlorine from the UV rays of the sun. The most common types are dichlor and trichlor.
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| What does "ORP" stand for? | show 🗑
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| show | Any compound that removes or destroys organic waste and organic compounds in the water.
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| What is ozone and what is it used for? | show 🗑
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| What is phenol red used for? | show 🗑
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| Define "SEQUESTERING AGENT". | show 🗑
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| Define "SHOCK TREATMENT". | show 🗑
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| show | Water that has a low calcium and/or magnesium content. Soft water can result in the etching of the pool's surfaces, and should be increased with calcium chloride.
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| Define "SUPERCHLORINATION". | show 🗑
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| Define "TURBIDITY". | show 🗑
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| show | aka Skimmer Weir. The small floating door on the side of the skimmer over which water flows on its way to the skimmer. The weir prevents debris from floating back into the pool when the pump is off.
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| Who is Jacob Riis Veiller? | show 🗑
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| show | An underground storage tank installed prior to January 1, 1984.
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| Define "New UST". | show 🗑
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| Feces can enter the host digestive system through these most common routes of exposure. | show 🗑
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| show | The occurrence of a disease, within a community or region, which is clearly more than the normal occurrence or expectancy of the particular disease (ie., depends on the disease itself and its known occurrence); "cluster" of occurrences of a disease
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| show | A disease or infectious agent in a geographical area (and/or in a particular population) within which the disease or infectious agent is expected to be around to some degree, e.g. the plague. This designation can change if an "outbreak" occurs.
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| Define "Pandemic". | show 🗑
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| Define "Epizootic". | show 🗑
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| Define "Zoonosis". | show 🗑
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| Define "Epidemiology". | show 🗑
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| show | Proper employee hygiene; approved food sources; safe food handling; use of good [potable] water.
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| show | Occurs when a causative "agent" invades an animal or human host's tissue. Types include: Bacterial (aerobic & anaerobic); Viral; Parasitic (protozoans & worms); Fungal.
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| show | a reaction that arises when an infectious agent takes control of a host's tissue and the reaction serves as an indication of a particular disease or disorder. Clinical Cases.
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| show | Subclinical
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| show | A host that has been infected with (harbors)a disease but does not show any signs or symptoms (asymptomatic). "Temporary ____" only has the infection when the disease is viable. "Chronic ____" has infection/disease permanently.
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| Name the four common bacterial "shapes" and size range. | show 🗑
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| Define "Fomite". | show 🗑
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| show | 1. Respiratory System (most common), 2. Oral/digestive system (fecal-oral)(2nd most common), 3. Skin (dermatitis), 4. Eyes, 5. Injections (accidental needlesticks, etc.)
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| Name the organisms that can enter the body by infecting the skin. | show 🗑
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| show | Disease/infection contracted by a patient while under medical care (occurring within 72 hours of admittance to a hospital and not previously present). Examples are Staphylococcus aureus and Streptococcus infections.
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| Name 4 common infections by fecal oral route. | show 🗑
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| What is the function of nasal passages? | show 🗑
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| show | Part of respiratory system (upper lung)that contains cilia, which carries the mucous with contaminants up to the esophagus.
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| show | Part of middle to lower lung, finally connecting to alveoli. Constricts when irritated and produces coughing or sneezing, which is a clearance mechanism for the human body.
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| What is the function and location of alveoli? What particle size can reach the alveoli? | show 🗑
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| show | Resistance received from the antibodies of another person/source, in this case from mother to fetus through blood circulation (without additional human interference/external promotion & antibodies not generated by the fetus itself).
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| show | Resistance from an infectious agent gained by innoculation of antibodies from another person or animal serum. The antibodies are not generated by the body of the person to be innoculated.
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| show | Resistance to infection through the body's production of its own antibodies as a reaction to an innoculation of weak or killed infectious agents or its products, such as small pox vaccinations. Memory cells remain to resist future encounters w/same agent.
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| Define "Naturally acquired active immunity." | show 🗑
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| Define "Vaccine." | show 🗑
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| show | Age; Gender/sex; Race; Genes/heredity; individual immunologic state. You have no control over these.
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| Define "Extrinsic." List extrinsic factors to a host's susceptibility to infection/disease (causation). | show 🗑
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| List the important 'social environment' factors in disease causation. | show 🗑
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| show | Roach Router aerosol spray contains relatively non-toxic Pyrethrum, but is mixed with killing compound, piperonyl-butoxide, to make a pesticide compound w/overall greater killing power than each individually.
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| Define (a.)"Sclerosis" and (b.)"Scleroderma." | show 🗑
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| Define "Dermatitis." | show 🗑
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| Explain the difference between "isolation" & "quarantine." | show 🗑
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| show | Vector:Dermacentor andersoni (Wood Tick)residing on squirrels, chipmunks & wood rats (Reservoir); Virus causes dengue-like symptoms w/o rash; onset 4-5 days with recurring fever after 2-3 more days.
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| Approximately 70% of liver transplants are due to this disease. List type, common name, incubation & mode of transmission. | show 🗑
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| The infectious agent of this disease attacks the liver and is most viable type. List type, common name, viability & mode of transmission. | show 🗑
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| show | Infectious type of hepatitis; found in poop of man/primates; vehicle is contaminated food such as milk, cold meats, salads, raw or undercooked oysters/clams/mussels grown near sewage outfalls or from handling with improper hygiene/handwashing; 15-50 days
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| show | Animal's head is removed; Cross-sectional cut made through brain & spinal column; the presence of "hot heads", or negri bodies, indicates this virus.
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| show | Hepatitis (A,B &C); and Yellow Fever(togavirus/flavivirus); one is transmitted by fecal-oral or blood, and the other by the Aedes mosquito.
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| Caused hemorragic fever of renal (kidney) system and death in southwestern Amer. Indian Reservations in early 1990's from reservoir of infected field rodents such as deer mice. | show 🗑
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| show | In aerosolized rodent feces/urine/saliva; incubation 5-42 days; abrupt fever, aches, anorexia/vomiting, kidney disorder; if breathed-fatal w/i 12 hrs; take respiratory dust protection, disinfect w/chlorine bleach for 10-15 min, wipe clean -never sweep.
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| show | Aka -Parrot Fever or Ornithosis; bacteria; parakeets/parrots, pigeons, other birds; direct contact and aerosolized feces,nasal or eye discharges;4-15 days;fever,ache,chills, respiratory infection, can become encephalitic.
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| show | Dermal - spores enter skin lesions & progresses into tissues, w/edema (body swells), 2-7 days; Spores can also be inhaled or ingested (gastro-intestinal), both highly fatal; fever, shock in 3-5 days, death shortly thereafter.
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| How is Bacillus anthracis (anthrax) controlled? | show 🗑
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| show | 1.1st stage,lymph nodes swell(buboes),not very contagious human to human, w/i the body; 2.Adv. stage,now in lungs, very contagious, transmitted by respiratory discharge; called Black Plague from ruptured blood vessels, deadliest disease known to 'man'.
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| show | Yersinia pestis bacteria, bite of infected oriental rat flea(Xenophylla cheopis) or airborne from infected human; rodent is vehicle; flea vomits into bite prior to bloodmeal;2-6 days; flea powder w/2%diazinon or 5% malathion dust then destroy rodent.
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| show | 50 foot candles
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| show | Characteristics of coliform bacteria.
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| show | Leptospira (long-thin spiral-shaped bacteria)
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| What is a foot candle? | show 🗑
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| show | Measures TDS (total dissolved solids) in water.
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| show | Turnover rate of every 1/2 hour.
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| show | Turnover rate of every 1 hour.
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