EFMB exam 2024 with 100% correct answers

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 5-1