Module 4: Installation and Maintenance Take the Quiz Below Module 4: Installation and Maintenance Quiz 1. According to the HDR study, in Phoenix, water softening activity makes up approximately how much of the salt treated at wastewater plants:(Required) Nearly all salt The study was unable to determine the amount About 8 to 10% None 2. Which of the following is NOT a major way in which recycled water is used at this point:(Required) Nuclear plant cooling Groundwater regeneration Drinking and bathing Landscape activities 3. The main reason most central treatment plants do not currently treat for salinity is:(Required) No such treatment technology exists today High cost of treatment Political inability None of the above 4. Which is the most common type of ion-exchange water softener currently being offered on the market today:(Required) DIR (Demand initiated regeneration) Reverse osmosis Time clock Whole house filtration 5. What is the primary advantage of DIR water softening over time clock units:(Required) Compact size allows for easier placement Much easier maintenance Quieter operation Savings in salt and water use 6. In major appliances, the use of hard water can lead to:(Required) Corrosion of mechanical elements Scale build up and deposits Dangerously high phosphate discharge Overloading and spillage 7. The danger of softened water going through pipes has been proven to lead to:(Required) Build up of concentrates Corrosion Failure of joints None of the above 8. Using softened water in washing machines can lead to:(Required) Longer wash times Better stain removal and less water use Color fading The need for additional detergent Δ
