REHS Study Guide Questions & Answers (Complete Solutions)

What is the depth at which flies can emerge from a landfill? - ANSWER-6 inches compacted and 5 inches noncompacted Why is the use of cooper sulfate crystals recommended for some septic tanks systems - ANSWER-It will destroy roots that the solutions comes in contact with What is the overall purpose of bar screens, comminutors, and grit chambers when it comes to wastewater treatment? - ANSWER-It removes larger solid What is the most plentiful form of available water? - ANSWER-Groundwater What are Waterborne Diseases? - ANSWER-Results from ingestion of water that is harboring a pathogen example: Typhoid fever. What are Water-washed Diseases? - ANSWER-Spread by fecal-oral route or person to person contact. Facilitated by lack of personal hygiene. What are Water-based Diseases? - ANSWER-Caused by infection arising through ingestion of pathogenic agent Example: guinea worm larvae, Termatode larvae. What are Water-related Diseases? - ANSWER-Facilitated by insects vector that breed in water: example filariastus abthropods that carry Dengue fever. What are Inhalation of contaminated water aerosols? - ANSWER-Legionella Pneumophila What is the ecologic agent of cyclosporiasis? - ANSWER-Cyclospora Cayetanensis What food is associated with cyclosporiasis? - ANSWER-Imported Raspberries, Lettuce form South America Most waterborne disease fatalities occurred before 1940 and were attributed to the waterborne illness? - ANSWER-Typhoid Fever Waters suitable for drinking water supplies and shellfish rearing are monitored routinely for? - ANSWER-Microbiological Quality Only what % of the global content of water constitutes fresh water? - ANSWER-2.6 or 3 Percent What is a waterborne disease that can be prevented through vaccinations is ? - ANSWER-Typhoid Fever or Cholera The World Health Organization (WHO) estimates that ______% of all diseases are attributable to inadequate water or sanitation - ANSWER-80 Percent Viral infections readily spread through drinking water, food and water-contact recreation activities due to what? - ANSWER-The low infectious dose for pathogenic viruses and protoza. Shigellosis: - ANSWER-A bacteria What is the specific agent for shingellosis? - ANSWER-Genus shingella Example: flexneri, sonnei, boydlii, and dysenteriae