The Wastewater Treatment B Test Study Guide Graded A+

All of the following EXCEPT ________ are damaging or irritating to the mucus membranes or lungs if inhaled: A) Ozone B) Lime Dust C) Chlorine Gas D) Carbon Dioxide E) Ferric Chloride Dust {Ans: Ozone}If a Leak is suspected in an off-line, back-up, one-ton chlorine cylinder, after putting on proper safety equipment, the operator should first: {Ans: Call appropriate emergency response personnel.}(On the WWTP Example Permit) The daily flows indicate? {Ans: A violation of the daily-average limit}Sludge from a digester should be slowly drawn to a drying bed in order to {Ans: avoid thinning of the sludge during the drawing operation.}(On the WWTP Example Permit) The dissolved oxygen values indicate? {Ans: A violation of a grab sample limit}Assume that a pumping unit with a 14 3/4 inch impeller has characteristics as described by the pump curve shown in the exhibit. If the pumping unit is working against a static head of 47 feet, and the force main on the discharge side has a total friction loss of 4 feet, the approximate pump discharge should be {Ans: 1550 gallons per minute}