QUIZ #3 (4/14/09) Name: 1. List (i.e. no explanation, just the correct word) the 6 unit operations involved in treating surface water (as described in class). (3 pts) Screening, mixing flocculation, sedimentation, filtration, disinfection 2. What are two requirements for a disinfectant. (4 pts) Destroy the kinds and numbers of pathogens that may be introduced into water within a feasible period of time over an expected range in water temperature Must meet possible fluctuations in composition, concentration, and condition of the waters to be treated Must be neither toxic to humans and domestic animals nor objectionable in required concentrations Must be dispensable at reasonable cost and safe and easy to store, transport, handle, and
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