REHS/RS NEHA STUDY GUIDE - REVISED 9/ Questions and Correct Solutions

REHS/RS NEHA STUDY GUIDE - REVISED 9/2024 Questions and Correct Solutions When gas pipe is leaking, what methods would be used by the technician to identify the exact point of leakage? - Answer -Using soap bubble solution Which organization requires cover for baking dough - Answer -BISSC (Baking Industry Sanitation Standards Committee) The Registered Sanitarians are first and foremost: - Answer -Educators Common microorganism associated with skin rash in whirlpools? - Answer -Pseudomonas aeruginosa Complaining of extreme eye irritation by swimmers in a swimming pool may be: - Answer -Improper pH value Workers in dental care may receive: - Answer -Mercury Vapor poisoning Most accidents that occur in the home to infants aged 1-4 is caused by: - Answer -Walking/falling Most accidents around swimming pools: - Answer -Drowning Which can adversely effect the nerve cell? - Answer -Neurotoxin High rate of infection: - Answer -Campylobacter jejuni -- usually found with Salmonella, caused by contaminated chicken source. Most enteric disease: (Enteric-related to the digestive system) - Answer -Norwalk virus The LEAST amount of backfill over the absorption field should be: - Answer -12 inches (12-18'') Best method to avoid UST (Underground Storage Tank)problems: - Answer -Prevention from corrosion Filters will: - Answer -Reduce stray radiation Swimmers ear is caused by: - Answer -Pseudomonas A principle for effective radiation protection: - Answer -distance, time, shielding Radiation could scatter and bounce off the - Answer -wall, floor, ceiling Know characteristics of alpha particles - Answer -Are they made of protons & neutrons? YesIs absorbed the most matter? No Do they have a high penetration rate? No Minimum temperature for laundry in nursing home & health care facilities - Answer -160°F Which test is initially used if water is suspected of contamination with fecal matter? - Answer -FECAL coliform. Which one is the correct sequence? - Answer -Coagulation-flocculation-sedimentation-filtration The minimum retention time recommended for a septic tank is: - Answer -24 hours Which filter is BEST to use for small communities in developing areas and in rural locations? - Answer - Slow sand filter Which filter is BEST for removal of Giardia cysts from low turbidity water - Answer -Slow sand filter (DE is best for swimming pools and industrial water supplies, not drinking water) Microbial pollution travels only a short distance through: - Answer -Smooth clay Backsiphonage may be prevented by all of the following methods except: - Answer -Hydrostatic loops Which of the following is NOT REQUIRED at a water treatment plant? - Answer -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 - Answer -protozoa Which one is most commonly transmitted by food or water? - Answer -Hepatitis A Entamoeba Histolytica is a - Answer -Protozoa Which is the preferred field test for a water system (for residual chlorine)? - Answer -DPD Which is the measurement of the amount of light scattered by particles suspended in water test sample? - Answer -Nephelometric Turbidity Units (NTU) Giardia is classified as a: - Answer -Protozoa Which is transmitted by food or water? - Answer -Hepatitis A Entamoeba Histolytica is classified as a? - Answer -Protozoa What is another name for swimmer's itch? - Answer -Schistosoma sppHigh concentrations of Nitrates in drinking water are: - Answer -A possible cause of methemoglobinemia (Blue Baby Syndrome) Well head protection? - Answer -casing, cap and surface seal If a water sample is chlorinated: - Answer -Use a bottle with Sodium Thiosulfate (acts as a dechlor) Water sampling technique when transporting to the lab? - Answer -sterile glass or plastic bottle is the most important (also using the right preservative is important) Which steps are correct in stream cleaning? - Answer -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? - Answer -Boil for 1 minute. (100 degrees Celsiu