Wastewater 4 Study Guide

What is the odor detection limit of chlorine gas? CORRECT ANSWER 0.3 ppm What is a cathode? CORRECT ANSWER negative pole of an electrolytic cell or system The least reactive metals are called CORRECT ANSWER cathodic metals Unless water cooled, the operating temperature of a mechanical seal in a pump should never exceed CORRECT ANSWER 160 F or 71 C What term describes the condition that exists when the source of the water supply is below the centerline of the pump CORRECT ANSWER suction lift All occupied trenches 4 or more feet deep must provide exits at CORRECT ANSWER 25 ft intervals What is the difference between a weak acid and a strong acid? CORRECT ANSWER amount of hydrogen ions released What is the best type of valve to use to dampen a water hammer? CORRECT ANSWER pressure-relief What does the term stray-current corrosion mean? CORRECT ANSWER decomposition of a material caused by