Water Distribution Exam 1 2024 Latest Update Correct 100%

Back siphonage - ANSWER backflow due to negative or reduced pressure in water system. occurs during low pressure events such as a line leak Reverse flow caused by a loss of supply pressure Back Pressure - ANSWER Is caused when a potable water system is connected to a non potable supply operating under a higher pressure that pushes contaminated liquid back into the public water system Back Pressure - ANSWER Occurs when the pressure of the connected system exceeds the pressure of the drinking water system Backflow - ANSWER Occurs when the pressure of the non-potable system. Exceeds the positive pressure in the water distribution lines. Diseases attributed to cross-connections: - ANSWER Dysentery• Gastroenteritis• Hepatitis• Salmonellas Direct Cross-Connection - ANSWER A direct cross-connection is subject to backpressure or backsiphonage. Undesirable material being pushed into the system. Indirect Cross-Connection - ANSWER Undesirable material being pulled into the system. An indirect cross-connection is subject to back-siphonage only. Air Gap - ANSWER Air Gap: physical separation of the potable and non-potable system by an air space. The simplest, most reliable way to provide backflow prevention Reduced Pressure (RP) Zone Backflow Preventer - ANSWER Provides the greatest protection against backflow caused by back-pressure and back-siphonage. The RPZ should be used where continuous pressure or high hazard conditions exist, Reduced Pressure (RP) Zone Backflow Preventer - ANSWER Must be tested annually and internal parts replaced every five years.