Water Distribution Practice Exam Grade 1 & 2 Certification Arizona| 100% Verified| Latest

Water Distribution Practice Exam Grade 1 & 2 Certification Arizona| 100% Verified| Latest What event does a continuous positive pressure in a distribution system prevent? a backflow condition 3 multiple choice options Define the term "Backsiphonage"? a form of backflow due to a reduction in system pressure which causes a subsatmospheric pressure to exist at the site in the water system 3 multiple choice options Reverse water flow in a distribution system caused by a vacuum in a water supply main is called backsiphonage 3 multiple choice options Why must the relief port of a reduced pressure principle backflow prevention device never be plugged or extended? so the device will function as designed 3 multiple choice options In instances where non-potable water or toxic wastes are connected directly with potable water systems, the preferred method of correction for such a cross connection is by installing a physical separation (air gap) between the two systems 3 multiple choice options A connection between a safe and an unsafe water supply is called a cross connection 3 multiple choice options Why is it important to thoroughly flush out a newly installed backflow-prevention device before testing? to rid the unit of foreign objects and particles 3 multiple choice options How must a pressure vacuum breaker backflow device be installed? it must be at least 12 inches above the highest downstream outlet 3 multiple choice options Name the condition in which the pressure in a distribution system is less than the atmospheric pressure backsiphonage 3 multiple choice options What does a backsiphonage condition usually cause? reduced pressure or negative pressure on the service or supply side 3 multiple choice options On what item might you find a vacuum breaker? an irrigation system 3 multiple choice options What does a double check valve backflow assembly provide effective protection from? both backpressure and backsiphonage of pollution What is the maximum time period between having a backflow device tested by a certified tester? 1 year 3 multiple choice options Which of the following has the greatest potential to cause contamination if a cross connection occurs? a pesticide mixing tank 3 multiple choice options Which statement best describes the operation of a reduced pressure principal backflow assembly? the relief valve pressure principal backflow assembly 3 multiple choice options Which statement is true about a double check valve backflow assembly? a double check valve is not designed to stop backsiphonage of a health hazard 3 multiple choice options Who is responsible for insuring that water contamination due to a cross connection does not occur?