Class "C" Water Exam Questions and Answers Already Passed

Class "C" Water Exam Questions and Answers Already Passed Calcium Hypochlorite A common chemical used in the disenfection of a small water supply is- A Cross Connection A physical connection between a potable water supply and a house well would be- Demand The amount of Chlorine in mg/L that is used by reacting with iron, organics, or bacteria is called? Greenish Yellow color Heavier than air Pungent, Penetrating odor Corrosive All of the following are Physical characteristics of Chlorine gas- Solution feed pump Which of the following would be considered a part of a hypo-chlorinator system? Flow measuring device According to state requirements, all public water supply wells should be provided with a raised concrete sealing block, screened vents and- The difference in static and pumping levels The drawdown of a water well is determined by- If it is more acidic or base The pH of water indicates- 0-14 The pH of water is expressed by a scale of numbers ranging from- 7.0 Water that is considered neutral is expressed on the pH scale at- Use of an approved, sterile container Which of the following is a required step in collecting a routine distribution sample for bacteriological testing? Turbidity Sand filtration will remove which of the following from surface water? Taste and Odor control Activated Carbon is used in a Surface Water Plant primarily for? Alum and Ferric Chloride Which of the following chemical(s) are commonly used as coagulants in surface water treatment? Screened Vents An approved locking roof hatch An overflow pipe with hinged flap device Annual inspection and maintenance as needed Ground storage tanks are required to be provided with which of the following? Painting Cathodic protection Water stabilization An elevated storage tank should be protected against corrosion by- 35 psi A public water supply system should maintain residual pressure of 20 psi and a minimum normal operating pressure of- 50 mg/L Before a new or repaired water line is placed into service, it must be properly disinfected by providing a chlorine dosage of _____ and proper detention time. Aquifers Water bearing formations beneath the earth's surface that are used as a source of water for public water supplies are- Determine water levels in the well The purpose of an air line on a well is- Reduce the amount of sand pumped The mesh size is an important