Water Distribution level 3 Questions & Answer Solved 100%

What federal agency is responsible for the rule making and enforcement of the safe water drinking act? - Answer Enviromental protection agency In detecting chlorine gas leaks from the disinfection assembly, an ammonia soaked rag will produce what? - Answer A dense white vapor The chlorine concentration in the water distribution system must be at least - Answer 0.2 mg/l What is the MCL for chlorine? - Answer 4 mg/l What is the minimum pressure in a water distribution system? - Answer 20 psi What is a brief meeting held around the tailgate of a truck called - Answer Tailgate safety meeting What form of chlorine has the lowest percentage of available chlorine and has the shortest shelf life - Answer Sodium hypochlorite The difference between static level and pumping level in a well is called? - Answer Drawdown Water pipelines are generally designed to have a maximum water velocity of - Answer 5 fps What are small mounds of corrosion that form on the inside of iron pipe - Answer Tubercles What is the minimum horizontal distance between a Watermain and a sanitary sewer main - Answer 10 feet Which of the following pumps must never be started until it is properly prime - Answer A centrifugal pump Hydrogen sulfide in water is under desirable because - Answer Imparts an unacceptable odor A temporary cloudiness in water is caused by - Answer Air entrainment In water treatment the degree of cloudiness in water is measured by - Answer Turbidity Chlorine is - Answer Heavier than air Chlorine residue and water is measured in the field using the - Answer DPD What is the purpose of disinfecting water - Answer Prevent waterborne diseases