REHS/RS NEHA Study Guide – Revised. Questions with accurate answers, 100% Approved

REHS/RS NEHA Study Guide – Revised. Questions with accurate answers, 100% Approved When gas pipe is leaking, what methods would be used by the technician to identify the exact point of leakage? - ✔✔-Using soap bubb ...

REHS/RS NEHA Study Guide – Revised. Questions with accurate answers, 100% Approved When gas pipe is leaking, what methods would be used by the technician to identify the exact point of leakage? - ✔✔-Using soap bubble solution Which organization requires cover for baking dough - ✔✔-BISSC (Baking Industry Sanitation Standards Committee) The Registered Sanitarians are first and foremost: - ✔✔-Educators Common microorganism associated with skin rash in whirlpools? - ✔✔-Pseudomonas aeruginosa Complaining of extreme eye irritation by swimmers in a swimming pool may be: - ✔✔-Improper pH value Workers in dental care may receive: - ✔✔-Mercury Vapor poisoning Most accidents that occur in the home to infants aged 1-4 is caused by: - ✔✔-Walking/falling Most accidents around swimming pools: - ✔✔-Drowning Which can adversely effect the nerve cell? - ✔✔-Neurotoxin High rate of infection: - ✔✔-Campylobacter jejuni -- usually found with Salmonella, caused by contaminated chicken source. Most enteric disease: (Enteric-related to the digestive system) - ✔✔-Norwalk virus The LEAST amount of backfill over the absorption field should be: - ✔✔-12 inches (12-18'') Best method to avoid UST (Underground Storage Tank)problems: - ✔✔-Prevention from corrosion Filters will: - ✔✔-Reduce stray radiation Swimmers ear is caused by: - ✔✔-Pseudomonas A principle for effective radiation protection: - ✔✔-a. distance b. time c. shielding d. all (this is the answer) Radiation could scatter and bounce off the - ✔✔-a. wall b. floor c. ceiling d. all of the above (this is the answer) Know characteristics of alpha particles - ✔✔-Are they made of protons & neutrons? Yes Is absorbed the most matter? No Do they have a high penetration rate? No Which test is initially used if water is suspected of contamination with fecal matter? - ✔✔-a. coliform b. fecal coliform c. enterococci d. E.coli The answer is fecal coliform. Which one is the correct sequence? - ✔✔-Coagulation-flocculation-sedimentation-filtration The minimum retention time recommended for a septic tank is: - ✔✔-24 hours Which filter is BEST to use for small communities in developing areas and in rural locations? - ✔✔-Slow sand filter Which filter is BEST for removal of Giardia cysts from low turbidity water - ✔✔-Slow sand filter DE is best for swimming pools and industrial water supplies, not drinking water Microbial pollution travels only a short distance through: - ✔✔-Smooth clay Backsiphonage may be prevented by all of the following methods except: - ✔✔-Hydrostatic loops Which of the following is NOT REQUIRED at a water treatment plant? - ✔✔-A Pre-incident Plan "A water treatment plant should have a well-equipped laboratory, certified operator, and qualified chemist" -pg 232 of old Salvato book Giardia is classified as a - ✔✔-protozoa Which one is most commonly transmitted by food or water? - ✔✔-Hepatitis A Entamoeba Histolytica is a - ✔✔-Protozoa Which is the preferred field test for a water system (for residual chlorine)? - ✔✔-DPD Which is the measurement of the amount of light scattered by particles suspended in water test sample? - ✔✔-Nephelometric Turbidity Units (NTU) Giardia is classified as a: - ✔✔-Protozoa Which is transmitted by food or water? - ✔✔-Hepatitis A Entamoeba Histolytica is classified as a? - ✔✔-Protozoa What is another name for swimmer's itch? - ✔✔-Schistosoma spp High concentrations of Nitrates in drinking water are: - ✔✔-A possible cause of methemoglobinemia (Blue Baby Syndrome) Well head protection? - ✔✔-Steel or plastic casing, tightly fitting well cap and concrete mixture used for grouting the well's annular space. If a water sample is chlorinated: - ✔✔-Use a bottle with Sodium Thiosulfate (acts as a dechlor) Water sampling technique when transporting to the lab? - ✔✔-Most important to have sterile glass or plastic bottle (also using the right preservative is important) Which steps are correct in stream cleaning? - ✔✔-Stream pollution (organic) is apparent along its length by a Zone of Degradation (just below the source), the Zone of Active Decomposition, and the a Zone of Recovery or Self-Purification. O2 decreased in Zone of Degredation suspended solids increased and sludge on the stream bottom. Emergency water treatment? - ✔✔-Boiling for 1 minute. (100 degrees Celsius is 212 degrees Fahrenheit). Also can add suggested amount of chlorine per gallon of water and let sit for 30 minutes. Can also use 8 drops of iodine tincture per quart of water. Can also use 1 tsp of bleach per gallon of water As you know from previous readings, the composition of soil is very important in the removal of both viruses and bacteria. which of the following soil conditions is most favorable for removal of viruses? - ✔✔-Fine loamy sand over course sand or gravel NTU are most commonly used to? - ✔✔-Determine turbidity What causes water hardness? - ✔✔-Minerals...Dissolved calcium and magnesium bicarbonates, sulfates, and chlorides Water containing Nitrates generally indicates? - ✔✔-Evidence of past agricultural pollution (Note: Ammonia in the water comes from decomposition of organic matter and is evidence of fresh water pollution. Microbial pollution travels only a short distance through: - ✔✔-Sandy loam or clay which of these techniques is used to properly seal a drilled well to prevent contamination of the water supply? - ✔✔-Grouting One of the most common reasons for the contamination of the water supply coming from a drilled well through rock, clay or hardpan is; - ✔✔-Failure to seal the well casing properly, improper grouting The flushometer valve is typically protected by? - ✔✔-A non-pressure type vacuum breaker A physical cross connection? - ✔✔-Is a connection which may permit/allow the flow from an unapproved (non-potable, ie. sewer) water supply into a potable (approved) water supply. Which type of filter is best to use to strain/remove amoebic cysts? - ✔✔-Diatomaceous Earth Filter/Slow Sand/ Cartridge pg. 360 What makes water have a color? - ✔✔-Dissolved Solids The importance of surveys for new well water? - ✔✔-Infiltration from ground water (also the importance of a sanitary survey for a water system is in order to determine the safety and adequacy of the water supply). The importance of lime...to treat high concentrations of... - ✔✔-contaminants. Lime is spread on surface discharge for the purpose of disinfection and to remove bacteria. Also, lime softening of water entails the addition of lime to the water supply, which can remove a lot of viruses and bacteria. Which one is best used to remove/control color, taste, and odor? - ✔✔-GAC-granular activated carbon filter Which type of filtration method is the least effective? - ✔✔-Rapid sand filter which one is associated with water percolation? - ✔✔-Permeability Most institutions are? - ✔✔-Their own communities the importance of a ground fault interrupter? - ✔✔-A ground-fault circuit breaker or interrupter will automatically shut off the electric power at the source (used at pools). this device is activated when equipment (defective wire) permits current to flow into the ground directly or indirectly. Pg. 1027 What is the most common type of injury that occurs at home? - ✔✔-Falling (children 1-4) Fire requirements - ✔✔-Dual Egress Asbestos found in older homes - ✔✔-Found in homes built in and before the 1970's found in floor tiles and acoustic plaster ceiling (used for sound proofing or sound absorbency) when it deteriorates. The drain line of an ice machine should connect to the sewer system through: - ✔✔-An open receptacle with an air gap Vent gasses from a coal-burning furnace combined with high moisture - ✔✔-To produce sulfuric acid. (burning coal produces hydro carbons which mix with moisture which produce sulfuric acid) What is the importance of a P-Trap? - ✔✔-It's a plumbing device that is used to prevent sewer gases from entering a building through the drain piping. Prevents air from traveling back from the sewer line. The chimney should be how high above the home? - ✔✔-3 feet above a flat roof or 2 feet above the tallest part of a peaked roof or wall parapet. In tattooing which is least important? - ✔✔-Single dye (die)? Minimum wash temperature for hospital laundry is? - ✔✔-160 degrees Which one is associated with water percolation? - ✔✔-Permeability The majority of nasocrominal infections can be prevented by: - ✔✔-Hand washing What is a biohazard? - ✔✔-A material of biological composition, especially if infective, that constitutes a threat to people or their environment. The biosafety containment level suitable for work involving agents of moderate potential hazard to personnel and the environment is: - ✔✔-Biosafety Level 2 What are the minimum requirements for a house? - ✔✔-Sleeping rooms less than 40 ft. squared, living rooms less than 300 feet squared, 1.5 people per room (bedroom)...if one answer is 1.2 person per room choose that as the answer because it is not a min requirement (overcrowding in a bedroom - minimum is >or=2xbed+2)? Temporary residence? - ✔✔-Sleeping area of 40 ft. squared Travel trailer parks? - ✔✔-Roads a minimum of 18 feet wide, maximum 25 trailer spaces per acre, trailers 10 feet apart? Choose all of the above. Exposure to formaldehyde can cause - ✔✔-a. irritation to the respiratory passage b. contact dermatiti