WATER DISTRIBUTION D2 CALIFORNIA PRACTICE LATEST UPDATED 2025/2026 TEST WITH COMPLETE QUESTIONS AND SURE VERIFIED SOLUTIONS 100% GRADED AT A+ SCORE!! SURE GUARANTEED PASS!!

WATER DISTRIBUTION D2 CALIFORNIA PRACTICE LATEST UPDATED 2025/2026 TEST WITH COMPLETE QUESTIONS AND SURE VERIFIED SOLUTIONS 100% GRADED AT A+ SCORE!! SURE GUARANTEED PASS!! 1. The Difference between the static ground water level and the pumping level is the - ANSWER drawdown 2. Contaminant monitoring requirements can depend on - ANSWER all of the above 3. Sodium hypochlorite is - ANSWER a compound that can be purchased in liquid solution and can be used for disinfection. 4. The abbreviation DO stands for - ANSWER dissolved oxygen 5. High nitrate concentrations in water can affect - ANSWER infanta. 6. A corporatio stop is used to - ANSWER connect the service line to the water main under pressure. 7. A customer complaint about the presence of brown floc in tap water can best be handled by - ANSWER investigating the problem as soon as possible 8. The term "aquifer" relates to which one of the following ? - ANSWER groundwater 9. One indication of corrosive water is a high concentration of - ANSWER Carbon dioxide 10. Catholic protection means protection against - ANSWER Corrosion 11. The primary reason for the use of a dry barrel fire hydrant is to - ANSWER keep the hydrant from freezing 12. The component parts of a well include all of the following except - ANSWER pressure switch 13. At the same barometric pressure, the amount of dissolved oxygen in cold water tends to be ............ the amount of dissolved oxygen in the warm water - ANSWER more than 14. Which of the following is the principal constituent in water that causes corrosion of metals? - ANSWER dissolved oxygen 15. Which component of a centritugal pump moves the water? - ANSWER impeller 16. A record containing the size, location, and ties of water mains; valves; hydrants; tanks; reservoirs; and pump stations is called a - ANSWER comprehensive map 17. What term describes water that is suitable for drinking - ANSWER potable 18. a pump delivering 288,000 gallons of water in 24 hours operates at what average flow rate? - ANSWER 200 gallons per minute 19. Velocity of flow in mains is usually expressed in terms of - ANSWER Feet per second 20. A competent person at an excavation work site - ANSWER Is capable of identifying hazarda and has the authority to take corrrective measures. 21. Hydrogen sulfide gas smells like - ANSWER rotten eggs 22. which of the following methods can be used to renove high iron content from a well supply? - ANSWER oxidation and filtration. 23. Hardness may be expressed in - ANSWER Milligrams per litre as CaCO3 24. The basic unit of electrical power is the - ANSWER Watt 25. A standpipe is 84 inches in diameter and 20 feet high. How many gallons are in the standpipe when the water is 16 feet deep? - ANSWER 4,603 26. Check valves are used to - ANSWER permit flow in only one driection 27. Standard pumper connection fire hydranta should not be installed on water mains smaller then ----inches in diameter. - ANSWER 6 28. Beards or long sideburns prohibit an operator from safely - ANSWER wearing the face mask of a self contained breathing apparatus. 29. The water table is defined as the - ANSWER upper surface of the groundwater. 30. The shaft speed of an electric motor is most commonly expressed in units of - ANSWER revolutions per minute 31. A coupon test installation in a distribution system is used to - ANSWER determine the rate scaling or corrosion. 32. Disease causing bacteria are know as - ANSWER pathogenic 33. Normally, surface water and groundwater have a PH range of - ANSWER 6.8 to 8.5 34. Which is the best definition of turbidity in water? - ANSWER anything in water that scatters light 35. A competent person must inspect excavations and adjacent areas for hazards - ANSWER daily, prior to the start of work, and as needed throughout the shift. 36. The component of a centrifugal pump sometimes installed on the end of a suction pipe to hold the priming is known as a - ANSWER foot valve 37. The principal purpose of an altitude valve on an elevated tank is to - ANSWER control maximum filling level in distribution storage. 38. The term primacy means the - ANSWER authority by the states to supersede the USEPA drinking water regulations. 39. Reciprocating positive displacement pumps are also known as - ANSWER Piston pumps 40. Modertely hard water will have a hardness range of ----- mg/L as - ANSWER 61 to 120 41. A common method for removing hydrogen sulfide from water is - ANSWER aeration 42. The treatment process designed to kill pathogenic organisms is - ANSWER disinfection 43. Lead in drinking water can result in - ANSWER impaired mental functioning in children. 44. A disease that might be transferred to a new victim through water is - ANSWER typhoid 45. An average percentage range for unaccounted for water in a fully metered system is - ANSWER 11 to 15% 46. A cross connection is defined as a connection between - ANSWER a potable water system and nonpotable water system. 47. Backsiphonage is caused by - ANSWER partial vacuum in the line. 48. Five milligrams per litre equals ----- parts per million - ANSWER 5.0 49. When the pumping rate is increased, the effect on the cone of depression is to - ANSWER lower the pumping level 50. Which chemical is most often used to disinfect public water supplies? - ANSWER chlorine or chlorine compounds. 51. The purpose of a surge tank is to - ANSWER control water hammer. 52. The presence of total coliforms in drinking water indicates - ANSWER THe potential presence of pathogens. 53. The term MCL means - ANSWER maximum contaminnt level. a 54. The primary origin of coliforms in water supplies is - ANSWER fecal contamination by warm blooded animals.