ABC Wastewater collection Level 3 Solutions 2024

Turbidity in wastewater is caused by A. color B. dissolved calcium C. hardness D. finely divided suspended material - Correct Answer D. finely divided suspended material The gas most commonly associated with septic wastewater is A. carbon dioxide B. carbon monoxide C. hydrogen sulfide D. methane - Correct Answer C. hydrogen sulfide How many cubic meters per second in 10 MGD? A. 0.44 B. 1.44 C. 4.73 D. 24.62 - Correct Answer A. 0.44 Mechanical ventilation of a lift station is required to A. lower temperatures to reduce proportion of hydrogen sulfide B. reduce chlorine demand C. reduce corrosion D. increase DO in raw wastewater - Correct Answer C. reduce corrosion A wet well probe is usually used for ________ determination(s) of level. A. approximate B. dual point C. continuous D. single point - Correct Answer D. single point A pump is delivering at less than the expected rate of discharge. Which of the causes listed below is incorrect? A. speed of motor too low B. pump not primed C. impeller clogged D. discharge head too low - Correct Answer D. discharge head too low Metal pipes often fail because of A. back siphonage B. browning movement C. galvanic action