Texas Class D Water License Practice Exam Questions With Correct Detailed Answers | Already Graded A+Recent Version

TEXAS CLASS D WATER LICENSE PRACTICE EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS | ALREADY GRADED A+RECENT VERSION 1. Ground storage at a surface water treatment receiving the treated water is called the? - answer clear well 2. The tceq requires all storage tanks to have screened vents, licked hatches, a dust-proof cover, overflows with hinged flaps, and - answer entry ports 3. Total storage capacity (elevated storage included) must be how many gallons? - answer 200 4. Storage tanks must be painted, disinfected, and maintained according to what standards? - answer awwa 5. Coatings on storage tanks for contact with potable water must be approved by? - answer epa 6. Each foot of a water column produces how much pis? - answer 0.433 7. What is the state minimum normal operating pressure? - answer 35 psi 8. Elevated storage is water stored at least how many feet above the highest service connection? - answer 80 9. A ? Is a tank resting on the ground that is greater in height than diameter? - answer standpipe 10. What kind of tank also known as (hydropneumatic tanks) are cylindrical and horizontal to the ground. - answer pressure tanks 11. Annual inspections on tanks must be inspected how often? - answer yearly 12. Cathodic protection is an ? Method for preventing corrosion of the interior of metal tanks? - answer electrochemical 13. The tceq requires distribution system pressure to never fall below ? Psi. - answer 20 14. Under normal operating conditions, the distribution pressure must be at least ? Psi. - answer 35 15. Storage facilities ? Demand on the water supply? - answer equalize 16. Storage allows uniform pump rates, supplies water for fire fighting, and provides time for ? - answer disenfection 17. Ground storage at a surface water treatment plant is called a ? - answer clear well 18. The tceq requires storage tanks to have covered vents, locked hatches, a dust-proof cover, overflows with hinged flaps, and ? - answer entry ports 19. If a 30-inch diameter access opening is not provided in a storage tank, the primary roof access must not be less than ? Inches. - answer 30 20. No paint, coating, or wax containing ? Is allowed. - answer lead 21. Coatings for contact with potable water must be approved by ? , the national sanitation foundation, or the food and drug administration. - answer epa 22. An elevated storage tank is usually ? Supported above ground on a tower. - answer steel 23. Pressure from an elevated tank is maintained by the ? Of the water column. - answer height 24. A ? Is a tank resting on the ground that is greater in height than diameter. - answer standpipe 25. Storage tank inspection results must be kept at least ? Years. - answer 5 26. Chain link fence material must leave a gap at the ? Trim grass. - answer ground 27. The state requires stored water to have a disinfectant ? - answer residual 28. After construction or maintenance of storage tank, a ? Sample must be taken after filing the tank. - answer bacteriological 29. If the bacteriological sample is negative, more samples must be taken until ? Consecutive samples are positive. - answer 2 30. Critical safeguards of a distribution system include a chlorine residual, adequate pressure, bacteriological sampling and ? - answer cross connection control 31. Material used in water line construction must meet ? Specifications and should not affect the taste, odor, or quality of the water. - answer osha 32. Select pipe on the basis of strength, length, carrying capacity, durability, ease of installation, availability, soil conditions, and ? - answer cost 33. Prior to january 1, 2014 pipe and fittings containing more that 8.0% lead, or solders and flux containing more than ? Percent lead, are prohibited in a public water supply. - answer 0.2 34. Isolating ? Cut of sections of a system. - answer valves 35. ? Solves problems of taste, odor, red water, or bad samples. - answer flushing 36. The ? Is the most common design for residential use. - answer positive displacement 37. Mains must be no closer than ? Feet, in all directions, from sewers or manholes. - answer 9 38. Trenches for laying six-inch and larger pipe must be at least ? Inches wide and 12 inches wider than the pipe diameter. - answer 18 39. The top of a pipe in a trench must have a least ? Inches of cover. - answer 24 40. Do not work in a trench ? Feet or deeper unless it is protected from cave-ins. - answer 5 41. Using timber, plywood, or commercial devices to support an excavation is known as ? - answer shoring 42. Shoring is not necessary if the trench walls are sloped to the maximum allowable ? - answer slope 43. Place spoil banks at least ? Feet from the excavation. - answer 2 44. Dose new mains with ? Mg/l or more of chlorine at least 24 hours - answer 500 45. Do not place a main into service until a bacteriological sample is tested with ? Results. - answer negative 46. One sample is required for each ? Feet of completed main. - answer 1,000 47. Flushing reduces slime and scale buildup, reduces red water complaints, brings chlorinated water to contaminated areas, and removes ?, reducing materials from the system. - answer chlorine 48. Closing a hydrant valve too fast can cause water ? - answer hammer 49. ? Is a buildup of oxidized iron, calcium carbonate, or other chemicals in mains. - answer tuberculation 50. Factors that make water more corrosive are low ph, dissolved oxygen, and ? - answer free chlorine 51. Repairing a leak under some pressure has an advantage of reducing? - answer contamination risk 52. A ? Is a physical connection between a public water supply, and another supply of unknown or questionable quality, any source that may contain contamination, any water treated to a lesser degree. - answer cross connection 53. The air gap is the only cross-connection control method approved by the tceq for protection against ? - answer sewage contamination 54. When storms are expected, the water utility should alert personnel, check communications, fill gasoline tanks, check emergency equipment, fill storage tanks, and ? Elevated storage. - answer isolate