REHS Exam Questions with 100% Correct Answers | Verified | Latest Update, Exams of Advanced Education

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REHS Exam Questions with 100% Correct Answers | Verified | Latest Update Tapeworm infection is probably due to: - Correct Answer- echinococcus most outdoor air emissions are derived from - Correct Answer-transportation indoor air quality depends on - Correct Answer-sources of air pollution in the building, sources of pollution outside the building, and the exchange of air between the inside and outside the total amount of oxygen demand in a sample (in mg/L) as measured by a specific strong chemical oxidation procedure is called the: - Correct Answer-COD a black light is used by food inspectors to - Correct Answer- determine the presence of rodent urine sodium thiosulfate is added to water sample bottles to - Correct Answer-inactivate chlorine in water minimum separation distance are required and specified between the disposal field and: - Correct Answer-dwelling, property line, water course, and well (all of the above) NIOSH is the research arm of: - Correct Answer-OSHA the mandated public health activities listed in title 8-chapter 52 on the NJ administrative code are known as: - Correct Answer-core activities the legal definition of air pollution in NJ states that is the presence of one or more air contaminants in the - Correct Answer-outdoor atmosphere the venetians took important steps toward the control of communicable diseases when the introduced the practice of isolating ships that were under suspicion of carrying epidemic diseases. This practice is called - Correct Answer-quarintine which of the following is not a method of classifying viruses - Correct Answer-gram stain reaction which of the following is not a method of classifying bacteria? - Correct Answer-presence or absence of spikes on the membranous envelop the new jersey worker and community right to know act - Correct Answer-establishes a program for the disclosure of hazardous chemical substance information and it helps people in making informed decisions about the chemicals they work with and may be exposed to in their communities (A and C) if you ever wanted to know what hazardous chemicals are present at a covered facility what would you refer to? - Correct Answer-the right to know survey what agency will provide copies of the right to know survey for public and private sector facilities and hazardous substance fact sheets to anyone who makes a request? - Correct Answer-right-to-know county lead agencies How should shellfish be stored in a retail food establishment? - Correct Answer-ice What organ is radon most likely to affect? - Correct Answer- lungs If an inspector were to inspect a youth camp, which of the following would he ask to see? - Correct Answer-pool log containing ph and cl readings, written camp policies, proof of insurance, and administrative credentials (all of the above) A small pond near a farm experienced an algae bloom. Which of the following was most likely the cause - Correct Answer- Fertilizer runoff causing an increase in nitrogen and phosphorus Why are animals used in laboratory testing of chemicals as opposed to humans? - Correct Answer-Test results using animals can be analyzed in a much shorter period of time than if humans were to be used. Which of the following is least likely to occur as a product of air pollution? - Correct Answer-gastrointestinal problems During lunch break, a group of construction workers noticed an unusually high amount of Rattus rattus running around. This is probably due to the fact that: - Correct Answer-There has been a recent demolition of several blighted two story houses How is the concentration of radon measured? - Correct Answer-PCi/L; picocuries / liter What is the most likely source of childhood lead poisoning? - Correct Answer-old painted windows What is the best source of protection against radioactivity? - Correct Answer-lead out of the following shellfish, which is the least likely to give someone hep A. Mussels, scallops, clams, or oysters. - Correct Answer-scallops Which of the following can cause transmission of Hepatitis B? - Correct Answer-needle sharing, blood transfusion, plasma transfusion, homosexual activity (all of the above) A chemical reaction occurs when chlorine is added to water. The pH of the end product is 8.00. Which of the following equations is the best representation of the reaction? - Correct Answer-HOCL-----> H+ OCL- which process is least likely to occur in a septic system - Correct Answer-removal of BOD What does the term "bulking" refer to in sewage treatment? - Correct Answer-Flocculants in primary treatment contain sheathed bacteria and would not settle. ppb ( parts per billion ) of a chemical is best represented as - Correct Answer-12 ug/l In case of an overturned truck containing radioactive material, the best way of preventing injury is by: - Correct Answer-time, distance, shielding What's the reason for having air moving and ventilation in a manufacturing plant? - Correct Answer-A.To prevent build-up of vapors A hunter shot and subsequently skinned rabbits without wearing gloves. He then experiences ulcers on his hands and lymph node swelling. He probably has contacted: - Correct Answer-Tularemia Which of the following diseases, caused by a mite, has been frequently confused with chicken pox? - Correct Answer- Rickettsial Pox Organism which grow at low temperatures are: - Correct Answer-Psychrophilic Keeping hot foods hot and cold foods cold refers to temperatures? - Correct Answer-Less than 41f and greater than 135f Tapeworm infection is probably due to: - Correct Answer- Echinococcus Flocculation is best defined as: - Correct Answer-The bringing together of suspended particles Which of the following is not true concerning Q Fever? - Correct Answer-It's never transmitted person to person Halo organics are: - Correct Answer-Organic compounds that have Br- or Cl- in their structure. The formation of halo-organic in drinking water is most important because: - Correct Answer-The compound may be carcinogenic. The primary pollutant from a company burning fossil fuel is: - Correct Answer-CO2 A colorless, pungent odor released from fossil fuel plants is: - Correct Answer-SO2 The three chemicals of main concern as environmental pollutants are: - Correct Answer-ozone, acid gases and particulates The importance of using chemicals to treat trihalomethanes is because: - Correct Answer-it is carcinogenic Which of the following is a biological treatment process? - Correct Answer-RBC: SECONDARY Synergism is best defined as: - Correct Answer-the total is greater than the sum of the parts an open dump is: - Correct Answer-an improper method of waste disposal title 24 deals with - Correct Answer-food and drugs Adulterated food is defined as: - Correct Answer-containing substances and poisons what is a good example of point source pollution - Correct Answer-underground storage tanks drinking water tests are performed and monitored by - Correct Answer-certified laboratories loamy soil contains which of the following? - Correct Answer- sand, silt and clay a causative agent of aids is - Correct Answer-a virus that attacks the immune system the bubonic plague is transmitted by - Correct Answer-rat fleas the least favorable method of fly control in a dining hall is - Correct Answer-fogging and fumigation What is the significance of a perk test? - Correct Answer- Proper location and design of a septic What is zoonosis? - Correct Answer-Disease transmitted by vertebrate animals to humans Which of the following are examples of water quality tests? - Correct Answer-BOD, DO and microbial tests. (all of the above) when Food is inoculated with Staphylococcus Aureus and left out: - Correct Answer-Microbes would grow exponentially When there's a flu epidemic, the first consideration is to: - Correct Answer-those of high risk groups A perched zone of water would not be caused by: - Correct Answer-sandy loam in seepage field Transmission of disease through an inanimate object. - Correct Answer-fomite Hepatitis A Virus: - Correct Answer-Cannot multiply in food or water Passive monitors have limited utility for monitoring pollutants because... - Correct Answer-You need to visually monitor them to be effective Sources (causes) of indoor air pollution include: - Correct Answer-paint, oil, Tabaco products ( all the above) true or false, polio and hepatitis are types of viruses - Correct Answer-true giardia and cryptosporidium are two types of protozoa true or false - Correct Answer-true which is the best definition of total solids - Correct Answer- refers to the matter suspended or dissolved in water or waste water populations that increase rapidly can be best described as - Correct Answer-exponential growth which of the following is the best definition of dissolved solids? - Correct Answer-solids in water that can pass through a filter what is the best definition for suspended solids? - Correct Answer-solids in water that can be trapped by a filter (settleable and non-settleable) which of the following is the best definition for colloidal solids - Correct Answer-solids that remain dispersed in a liquid for a long time due to their small size and electrical charge Which of the following is the best definition for Floatable Solids? - Correct Answer-Matter in wastewater which will not stay in suspension during a preselected settling period, such as One Hour, but floats to the top. ( Oil & Grease ) true or false, fresh wastewater is usually ________ in color - Correct Answer-grey septic waster water will usually be _____ in color - Correct Answer-black what is false about campylobacter jejuni is false? - Correct Answer-the food it is most commonly linked with is undercooked beef, especially hamburger true or false, refrigeration is a reliable means of preventing growth of all types of clostridium botulinum? - Correct Answer-false true or false, stapholococcal food poisoning is a classic example of an intoxication not an infection - Correct Answer- true which one of the following organisms does not produce illness through a pre-formed toxin in food - Correct Answer- campylobacter jejnuni which microorganism does this statement describe: Produces toxins, an anaerobic spore former, typically linked to inadequately cooked, cooled or reheated meat dishes. It needs at least 100,000 viable cells to produce enough toxin to cause symptoms - Correct Answer-clostridium perfringes which pathogenic e coli matches this description: oldest recognized category of pathogenic E. coli. Major cause of infant diarrhea in developing countries. Transmitted by contaminated infant formula and weaning foods - Correct Answer-enteropathogenic e.coli Which microorganism is described by these key features? Aerobic spore former; at least 100,000 cells are needed to T/F: Rotating Biological Contactor (RBC) is a treatment of units that consists of a shaft, "media" tank and a drive unit - Correct Answer-true T/F: Activated Sludge is a floc or solid formed by microbes. - Correct Answer-true What control measure is used to elevate the amount of food available per pound of mixed liquor suspended Solids? - Correct Answer-Food to Microorganism Ratio F:M What is Mean Cell Resident Time? - Correct Answer-Average length of time a mixed liquor suspended solid particle remains in the activated process. ______________ is a combination of return activated sludge and wastewater (primary effluent) that flows into the aeration tank. - Correct Answer-Mixed liquor T/F: Mixed Liquor Suspended Solids (MLSS) The suspended solids concentration in the mixed liquor and common qualitative reference to the amount of microbes in the activated sludge process - Correct Answer-true Which of the following best defines Sludge Age? - Correct Answer-Process control measure that measures the length of time a particle of suspended solids has been undergoing aeration in the activated sludge process. Which of the following best defines Sludge Volume Index (SVI)? - Correct Answer-Process control test that evaluates the age/settling ability of the sludge Which of the following is the best definition for Waste Activated Sludge (WAS)? - Correct Answer-Refers to the solids being removed from the activated sludge. Which of the following best defines Organic Loading? - Correct Answer-Measures the amount of food available for microbes, Too much food overloads treatment system, results in poor treatment, Too little microbes will go dormant and/or die off (all of the above) All of the following statements are true about pH, expect. - Correct Answer-pH variability affects microbes. Optimal range is 6.5 -8.5/ Acceptable at 6.0 -9.0. Outside this range and the microbes will be affected. (all of the above are true) What is a tank? - Correct Answer-Also known as the aeration tank, and its designed to provide a suitable environment where microbes can grow, reproduce, and stabilize organics via suitable mixing and detention time. (A and B) What is aeration? - Correct Answer-Provides oxygen and energy from mixing, and Can be mechanical or diffused air supply (A and C) What is the best definition for Settling Tanks (Clarifiers)? - Correct Answer-Designed to separate solids from wastewater. Settled solids are pumped back to the head or the aeration tank or they pump to the solids handling facility. RAS System consists of pumps, timers variable speed controllers, flow measuring system. word commonly used to describe dissentary - Correct Answer- shigella space measuring in housing codes - Correct Answer-square feet per floor space instrument to measure suspended particles in the air - Correct Answer-high volume sampler which of the following causative agents of the genus plasmodium is the most dangerous cause of malaria - Correct Answer-falciparum rabies is caused by: - Correct Answer-rhabdovirus a truck carrying molassses crashes and its contents are emptied into a lake. This causes a fish kill. What is the most likely reason for the death of the fish? - Correct Answer- decrease in the d.o due to increased BOD activity by bacteria rotavirus is most likely to affect - Correct Answer-young children and infants which of the following would be considered a non-cleanable surface? - Correct Answer-pitted pot psittacosis is associated with - Correct Answer-birds an individual came down with a case of mumps and a single case of influenza. What is the difference in resistance? - Correct Answer-mumps exposure and resistance is lifelong while influenza resistance is not lifelong due to changing virus characteristics (different strains) hep A virus: - Correct Answer-can not multiply in food or water. It must multiply in the host. A rodent-borne disease or disease caused by an insect carried by a rodent - Correct Answer-epidemic typhus, endemic typhus or marine typhus most common rat in the usa - Correct Answer-Rattus nervegicus sylvatic plague is a disease from - Correct Answer-wild rodents True or false. The pneumonic plague is rodent borne - Correct Answer-false what disease is deadly and transmitted from mice - Correct Answer-hanta virus What kind of test is used to test for TB - Correct Answer- Sputum most bateria are ____________ which is an organism that grows best in moderate temperature, neither too hot nor too cold. - Correct Answer-mesophile What is the vector for rocky mountain spotted fever? - Correct Answer-American Dog Tick the vector for filariasis - Correct Answer-mosquito what is the function of a sand filter - Correct Answer-removes suspended particles most probable number for shellfish waters to be acceptable - Correct Answer-70 total coliforms per 100ml devises that remove or limit air pollutants from factories - Correct Answer-electrostatic precipitators and scrubbers which of the following has the greatest penetrating power? - Correct Answer-gamma rays why would fecal coliform count be preferred to total coliform count? - Correct Answer-indication of contamination, animal vs. human. which process is least likely to occur in a septic system? - Correct Answer-removal of BOD What does the term bulking refer to in sewage treatment - Correct Answer-flocculants in primary treatment contained sheathed bacteria and would not settle 12 ppg of a chemical is best represented as - Correct Answer- 12 ug/l in the case of an overturned truck containing radioactive material, the best way of preventing injury is by: - Correct Answer-time, distance, shielding the reason for having air moving and ventilation in a manufacturing plant is to - Correct Answer-prevent buildup of vapors and gases a hunter shot and subsequently skinned rabbits without wearing gloves. He then experienced ulcers on his skin and lymph node swelling. He probably has contracted: - Correct Answer-tularemia which of the following diseases, caused by a mite, has frequently been confused with chicken pox? - Correct Answer- rickettsial pox organisms which grow at low temperatures are - Correct Answer-psychrophilic keeping hot foods hot and cold foods cold regers to these temps - Correct Answer-<41 and >135 which of the following is not true regarding q fever - Correct Answer-it is never transmitted person to person flocculation is best defined as - Correct Answer-binding particles together, bacteriastatic halo organics are - Correct Answer-organic compounds that have Br- and Cl- in their structure the formation of halo-organics in drinking water is most important because - Correct Answer-the compound may be carcinogenic What is the purpose of herd immunity - Correct Answer- vaccination of a certain percentage of the population to give immunity to the whole population what is the significance of a percolation test - Correct Answer- proper location and design of a septic system what bacteria causes pneumonia like symptoms and is found in air conditioning and coolant? - Correct Answer-Legionella what toxin is linked to tropical reef fish? - Correct Answer- ciquatera toxin What is not an indicator of fecal contaminants in the water? - Correct Answer-pseudomones a possible cause of unusual high number of rats in the area? - Correct Answer-demolition of buildings in the area What is NJSA 24? - Correct Answer-Food and drug code Disease associated with rabbits and small game? - Correct Answer-tuluremia What is Stoke's Law? - Correct Answer-expresses the settling velocities of small spherical particles in a fluid medium. What percentages of BOD and suspended solids are effected during primary settling? - Correct Answer-35% BOD and 60% Suspended solids What are diatoms - Correct Answer-a single-celled alga which has a cell wall of silica. Many kinds are planktonic, and extensive fossil deposits have been found What are the cooling processes to avoid the danger zone - Correct Answer-135 to 70 in 2 hours. 70 to 41 in 4 hours. Gravy has been stored overnight in a refrigerator. You need to reheat it so you can hot hold it for the day. What is the required temperature you need to reach to reheat a product? - Correct Answer-165 Fish should be cooked to what temperature? - Correct Answer-145 Chicken should be cooked to what temperature - Correct Answer-165 Ground beef should cooked to what temperature - Correct Answer-155 The most common food borne illness - Correct Answer- norovirus What disease is transmitted by rat urine? - Correct Answer- Leptospirosis True or False Staph aureus is an example of an intoxication, not an infection? - Correct Answer-True What is used to stabilize chlorine in pool water? - Correct Answer-Cyanuric Acid What is used to inactivate chlorine in pool water? - Correct Answer-sodium thiosulfate What is used to measure the frequency of new cases of a disease - Correct Answer-incidence rate A resident camp shall have on duty in residence an adult director who is - Correct Answer-certified person by the American red cross in advanced first aid a liquid with a pH of 4.6 is - Correct Answer-acidic flocculation is best defined as - Correct Answer-physical process that transforms smaller particles to larger aggregates what does the term bulking refer to in sewage treatment - Correct Answer-flocculants in primary treatment contained sheathed bacteria and would not settle threshold limiting value is: - Correct Answer-8 hrs that you can be exposed to a chemical with no adverse affects type of soil most difficult in the vertical flow of water in a septic system - Correct Answer-clay mottling is best described as - Correct Answer-an indicator of long term impeded drainage of soil an example of point-source pollution is - Correct Answer-an underground storage tank leak a person that harbors a specific infectious agent in the absence of a discernible clinical disease and serves as a potential source of infection is know as - Correct Answer-a carrier Which is true about Norwalk disease - Correct Answer- implicated in 1/3 all non-bacterial gastroenteritis outbreaks, antibodies develop to this disease slowly over time, symptoms include nausea. vomiting, diarrhea and fever a maximum contaminant level (mcl) is - Correct Answer-the level of a contaminant in drinking water which when exceeded, could cause health impacts Which of the following is not a link in the chain of infection - Correct Answer-infection gradient which disease has these characteristics: Acute bacterial infection, commonly affects tonsils, pharynx, larynx or nose. Characterized by a lesion with a grayish center surrounding inflammation - Correct Answer-diphtheria liposoluable organic compounds such as pcb's and chlordane which persist in the environment have a tendency of - Correct Answer-concentrating in the sediment of a surface water and bioaccumulate up the food chain the type of analytical study which is associated with individuals who initially do not have a disease, but were exposed to a suspected disease-causing agent - Correct Answer-cohort study coliform organisms are a group of organisms used as an indicator of - Correct Answer-fecal contamination by warm- blooded animals true or false. refrigeration is a reliable means of preventing the growth of all types of clostridium botulism - Correct Answer-false