68S PMT 108 PRINCIPLES OF WATER V.2 UNIT 1 EXAM QUESTIONS AND ANSWERS 100% CORRECT.  

Air Gap - ANSWERA physical separation sufficient to prevent backflow between the free-flowing discharge end of a potable water system outlet and any other system. Backflow - ANSWERThe flow of non-potable water or other liquids, mixtures, or substances into the potable water supply system. Back-siphonage - ANSWERBackflow resulting from negative pressures in the distribution pipes of potable water systems. Backflow Prevention Device - ANSWERA device or means designed to prevent backflow or back-siphonage. Check Valve - ANSWERself closing device which is designed to allow the flow of fluids in one direction and to close if there is a reversal of flow. Chloramine (Combined Available Chlorine) - ANSWERThe chlorine products formed by the reaction of equilibrium products of ammonia with the equilibrium products of chlorine. Containment - ANSWERAnything found in water which may be harmful to human health. Ex: microorganisms, minerals, chemicals. Cross Connection - ANSWERAny actual or potential connection between the public water supply and a source of contamination or pollution. Disinfectant - ANSWERa chemical or physical process that kills microorganisms such as bacteria, viruses, and Protozoa.