EFMB STUDY GUIDE| 170 QUESTIONS| WITH COMPLETE SOLUTIONS

Procedures that are used to change the chemical, physical, or microbiological quality of water correct answer: Water Treatment A process of killing infectious agents outside the body by direct exposure to chemical or physical agents. correct answer: Disinfection A water treatment process that uses chlorine or a chlorine compound. correct answer: Disinfection A total contact time of at least ____ minutes is required for satisfactory water disinfection. correct answer: 30 minutes ____ and _______ will cause chlorine to evaporate/dissipate more rapidly; therefore, periodic rechlorination of water may be required. correct answer: Heat & Sunlight To rechlorinate a full 400-gallon water trailer with calcium hypochlorite, mix ____ (MRE) spoonfuls of calcium hypochlorite from the 6- ounce bottle (or ___ ampules) with 1/2 canteen cup of water. correct answer: 1 MRE Spoonful of calcium hypochlorite in 6 ounces of water or 22 ampules with 1/2 canteen cup of water Boiling water at a rolling boil for ___ to ___ minutes kills most organisms that are known to cause intestinal diseases. In an emergency, even boiling water for ___ seconds will help. correct answer: 5-10 minutes, 15 seconds True or False. Vehicles used for transporting food must be clean and completely enclosed, if possible. Vehicles used for transporting garbage, trash, petroleum products, or similar materials may be used for transporting food even if the vehicles haven't been properly cleaned and sanitized. correct answer: False ______ hours cumulative time is the maximum such food can be in the danger zone and not be a health hazard. After _____