The minimum and maximum chloride residual in a water distribution system is ?

Level 1 water distribution practice test Guide Questions and answers 100% correct The minimum and maximum chloride residual in a water distribution system is ? - CORRECT ANSWER-0.2 mg/l and 4mg/L of free chlorine Nitrate may not exceed what concentration when tested yearly for a groundwater treatment plant ? - CORRECT ANSWER-10 mg/L The minimum number of total coliform samples that must be collected per month is based on Wich of the following ? - CORRECT ANSWER-The population served by the system When a distribution bacteriological sample is positive for a total coliform the procedure is ? - CORRECT ANSWER-Repeat the sample and take a sample 5 connections upstream and downstream to confirm total coliform For lead and copper sample the water must be In the pipeline for at least? - CORRECT ANSWER-6 hours What is hydraulic grade line ? - CORRECT ANSWER-A line to which the water level would rise in a small ,vertical tube,connected to the pipe How often should cathodic protection anodes in your system be inspected? - CORRECT ANSWER-Every year Water pipelines are generally designed to carry water at a velocity below ? - CORRECT ANSWER-2.5b FPS. Feet per second Energy use in water systems is defined best by ? - CORRECT ANSWER-Energy use varies among systems and an energy inventory study would need to be conducted to determine relationships The minimum recommended separation distance between a water main and a storm sewer is ? - CORRECT ANSWER-6 feet Which of the following should be in an organization plan ? - CORRECT ANSWERIdentifies clear lines ,defines the divisions of labor ,establishes unity of command If pipelines are not restrained using steel rods concrete thrust blocks can be used at ? - CORRECT ANSWER-Every bend and transition Engineering Drawings that show the depth of pipe, the pipe location both vertically and horizontally and the correct distance form a reference point are known as which of the following - CORRECT ANSWER-Plan and profile drawings Which are the components of directing staff ? - CORRECT ANSWER-Motivating & communicating The accuracy of large meters should fall wi