Water Distribution Exam Questions And Answers 100% Correction

A reverse flow condition, created by a difference in water pressures which causes water to flow back into the distribution system is referred to as what? {Ans: Backflow}Before entering a confined space you must first ________. {Ans: Test atmosphere}The U.S. National Primary Drinking Water Regulations is regulated at which level {Ans: Federal}A new well must be disinfected at the well, pump and screen with a ____mg/l solution. {Ans: 50}Instead of shoring, a trench may be sloped at what ratio? {Ans: 2 :1}Death can occur after a few deep breaths at what exposure rate? {Ans: 1000ppm}What is the responsibility of water distribution system operators? {Ans: Ensure safe and pleasant drinking water is delivered to everyone's tap}How far above the excavation must a ladder extend? {Ans: 3 ft}The maximum rate of chlorine removal from a 150lb cylinder is ___lbs per day or freezing will occur. {Ans: 40}What is the available chlorine of calcium hypochlorite? {Ans: 65%}About ____% or more of the storage capacity of the distribution system should normally be reserved for fire demand and emergency use. {Ans: 35%}What are the separations of water and sewer lines when being laid in