Wastewater III Study Exam Questions And Answers Elaborated 100%.

A 5.2 acre lagoon with an in-fluent of 47000 gallons per day is dropped 3 inches a day from a depth of 5 feet to a depth of 2 feet. How many gallons are discharged each day? - correct answers 470,577 gallons per day (exact problem) A centrifugal pump that loses efficiency is most likely due to what? - correct answers Cavitation,debris A piston or reciprocating pump should be operated when? - correct answers When the suction and discharge valves are open. A pump and motor should be? - correct answers Aligned At what time of day would the DO levels in apond be the lowest? - correct answers Early morning, algae consumes O2 at night Chlorine combines with ammonia to form what - correct answers Chloramines Chlorine is corrosive when it mixes with? - correct answers Moisture Define as-built plans. - correct answers A set of drawings or maps that indicates structures as the are currently built. If changes to these structures are made then the "as-built" plans need to be updated to reflect these changes. Define BOD. - correct answers The rate at which organisms use the oxygen in water or waste water while stabilizing decomposeable organic matter under aerobic conditions. Define endogenous respiration. - correct answers A situation where living organisms oxidize some of their own cellular mass instead of new organic matter they absorb or absorb from their environment. Disease causing organisms are called what? - correct answers Pathogenic First action for a polymer spill - correct answers Apply an absorbent to the spill such as sand or kitty litter and then sweep up the materials.