Texas Class D Water License Test (2024) || All Questions & Solutions (Graded A+)

Texas Class D Water License Test (2024) || All Questions & Solutions (Graded A+) Texas Class D Water License Test (2024) || All Questions & Solutions (Graded A+) What removes tastes, odors, and certain organics and gases, and oxidizes iron and manganese? This process includes the incorporation of air into the water by means of spray nozzles , steps or cascades, or trays of diffusers? - ANSWER - Aeration TCEQ regulation states that Shore installations , marinas, boats and houses on the watershed must have sewage? - ANSWER - disposal Water aerated or chlorinated at proper pH levels oxidizes the iron and manganese, turning them into solid? - ANSWER - particles Well casing and cementing protect the well from collapse and surface ? - ANSWER - contamination Sequestering does not remove iron from the water, but prevents it from combining with oxygen and? - ANSWER - reddening The quantity of water a formation yields depends on the formations thickness and? - ANSWER - permeability Cascade aerators, packed air-stripping towers, and air diffusers are used to aerate? - ANSWER - water Aeration can be used to remove what from the water supply? - ANSWER - iron and manganese Hydrogen sulfide has a rotten egg odor and is oxidized by? - ANSWER - super-chlorination When Iron levels get this high, it can cause red stains on clothing, colored water, or turbidity? - ANSWER - 0.3 mg/L Excess Manganese can cause? - ANSWER - black stains Another method of iron control is the use of? - ANSWER - sequestering agents What is a sequestering agent? - ANSWER - polyphosphates Well water is sometimes? - ANSWER - corrosive Low ph, dissolved gases, high temperatures, and high mineral levels can cause well water to be? - ANSWER - corrosive What is the process of removing calcium and magnesium by adding lime or by exchanging ions? - ANSWER - softening An ion exchange replaces calcium ions with? - ANSWER - sodium ions