Water Treatment Class E Cheat Sheet correctly answered 2023

Water Treatment Class E Cheat Sheet correctly answered 2023The minimum distance that a potable water line has to be from a sewer line. - correct answer 10 Feet The minimum distance that a potable water line has to be above a sewer line - correct answer 1 Foot Minimum size coupling for a fire hydrant - correct answer 6 inches How small must a system be in order to be able to collect all TC samples on one day? - correct answer 4900 or fewer served How soon must a + TC sample be resampled - correct answer Within 24 hours of the positive result Where must repeat TC tests be sampled - correct answer at the same tap, up and down at most 5 service connections of the positive result What must a positive TC sample be checked for? - correct answer The presence of FC or EC Volume of a TC sample - correct answer 100 mL What must be done before pulling a distribution sample? - correct answer Disinfect the sample point by torching or chemicals What is the Population Equivalent? - correct answer A means of expressing the amount of organic material in wastewater. In a domestic wastewater system, microorganisms use up about 0.2 pound (90 grams) of oxygen per day for each person using the system (as measured by the standard BOD test). May also be expressed as flow (100 gallons/person/day or 378 liters/person/day) or suspended solids (0.2 lb SS/person/day or 90 grams SS/person/day). How do you calculate the population equivalent? - correct answer May be expressed as flow (100 gallons/person/day or 378 liters/person/day) or suspended solids (0.2 lb SS/person/day or 90 grams SS/person/day). Use 2 variables to find the missing variable. Volume of a rectangle - correct answer HxWxL Volume of a cylinder - correct answer pi x radius squared x height how do you fill a line with water? - correct answer From the lowest point to the highest point what concentration of Cl2 must be used to disinfect a distribution line or tank? - correct answer 50 ppm what is the maximum length of a dead end with a 2 inch line? - correct answer 1500 feet what is a rotameter and what does it measure? - correct answer a rotameter is a glass enclosure with a ball inside used to measure the flow of gas from a cylinder in PPD (pounds per day) what must you do when starting a centrifugal pump? - correct answer make sure the suction side valve is open and that the pump is primed What is Chlorine dose? - correct answer The amount of chlorine added to a water supply what is chlorine demand? - correct answer the amount of chlorine required to "make the kill" What is chlorine residual? - correct answer The amount of chlorine left over after the kill name the processes of a conventional surface water treatment plant - correct answer Coagulation, flocculation, sedimentation and filtration What is the purpose of The Safe Drinking Water Act? - correct answer to protect the public from waterborne diseases