Additional Sample Questions

1. Main size, pump stations, and storage tanks are determined by: ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

2. Which of the following is a measure of the smoothness of a pipe? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

Cubic Foot of Water ,[object Object]

Divide up the Cubic Foot of Water ,[object Object],[object Object],[object Object],[object Object],[object Object]

What is 1 lb per square inch (1 psi)? ,[object Object],[object Object],[object Object],[object Object]

Relate to the Real World 100 psi of Pressure is on the Diver

What is the Pressure on the Diver? Exactly the Same Pressure of 100 psi is on the Diver!!! Hydraulic Grade Line

Hydraulic Gradeline (HGL) ,[object Object],[object Object],[object Object],[object Object]

Pump Stations New England Water Works Association ,[object Object],Raise in Hydraulic Gradeline

Measure of Pressure What pressure is on the Diver? 200 feet divided by 2.31 feet for every psi: 200 divided by 2.31 = 87 psi

Water Flows from Higher to Lower HGL Flow Flow The direction of flow is always from higher to lower hydraulic grade line (HGL) elevation.

Fire Flow Conditions New England Water Works Association ,[object Object],[object Object],20 PSI MINIMUM (46 FEET TO HGL)

3. Why is excessive water pressure in residences objectionable? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

4. What is the pounds per square inch pressure at the bottom of a tank, if the water level is 33.11 feet deep? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

5. Under the requirements of the Safe Drinking Water Act, it is the duty of the water purveyor to deliver? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

6. What type of ductile-iron pipe joint is used primarily for river crossings and underwater intakes, and occasionally rough terrain? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

6. What type of ductile-iron pipe joint is used primarily for river crossings and underwater intakes, and occasionally rough terrain? ,[object Object],New England Water Works Association

7. In general, a trench should be no more than how many feet wider than the diameter of the pipe? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

8. Which of the following is a distribution system layout pattern? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

Arterial Loop Distribution System New England Water Works Association Transmission Lines Distribution Main Arterial Main

Grid Distribution System New England Water Works Association Loop Feeder

Branching/Tree Distribution System New England Water Works Association Transmission Main Distribution Main

Combination Distribution System New England Water Works Association Loop Feeder Distribution Main

9. What is the cross sectional area of a pipe that is 10 in. in diameter? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

9. What is the cross sectional area of a pipe that is 10 in. in diameter? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association Use Area Formula: A= π r 2 or A= 0.785 d 2 Change diameter or radius to feet

10. How do you determine a utility’s average daily demand? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

11. As the temperature of the water increases, the disinfecting action of chlorine is ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

12. Large full storage tanks are typically disinfected with a chlorine residual of ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

13. Why is a well acidified? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

14. What is the primary source of coliform in a water supply? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

15. pH is a measure of ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

14. pH is a measure of ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

16. What is the recommended minimum contact time when disinfecting water mains with the chlorine slug method? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

17. Which of the following best defines static water level ? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

18. Where are chlorine samples typically collected from in the distribution system? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

19. Which of the following best describes the cone of depression ? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

Well Pumping New England Water Works Association Cone of Depression Drawdown Pumping Water Level Radius of influence

20. Turbidity is caused by ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

21. What is the term for a framework of wood or metal installed to prevent caving of trench walls? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

21. . What is the term for a framework of wood or metal installed to prevent caving of trench walls? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

22. Which of the following service line materials in NOT flexible? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

23. Which type of pipe is typically used in the construction of very large water mains? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

24. Air-relief valves are installed to ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

25. After a new main is installed and pressure tested, it should be ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

New England Water Works Association HYDROSTATIC or PRESSURE TESTING

New England Water Works Association WATER MAIN DISINFECTION PROCESS

26. A 2 in. tap can be made through a saddle on which of the following ductile iron pipe sizes? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

27. What type of rupture or break may occur when a pipe is unevenly supported along its length? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

27. What type of rupture or break may occur when a pipe is unevenly supported along its length? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],New England Water Works Association

28. Pre-stressed pipe is reinforced with ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

29. What is AWWA’s recommended maximum distance between valves in a residential area? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

30. How much space should there be between the shoring and the sides of the excavation? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

31. Which type of hydrant has no main valve but a separate valve for each nozzle? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

32. What is the maximum theoretical suction lift of a centrifugal pump at sea level? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

33. What type of motor in the simplest of all AC motors, with rotors consisting of a series of bars placed in slots? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

34. What does SCADA stand for? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

35. Which of the following type of valve is used in maintaining prime to a pump? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

36. What type of cleaning plug has hardened steel or silicon carbide wire brushes? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

37. For best results, what is the minimum flushing velocity when using the unidirectional flushing method? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

38. What is the cross-sectional area of a pipe 10 in. in diameter? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

39. Which of the following characteristics of a pump is shown in a pump curve? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

40. Which type of level sensor requires an air supply? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

41. Depending on its concentration & length of exposure, which of the following gasses can cause lung and skin irritation? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

42.Which class of fire involves electrical equipment? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

43. When a permit is required to enter a confined space, who may sign the permit? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

44. When any piece of electrical equipment is being worked on, the circuit breaker should be ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

45. OSHA is an acronym for ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

50. What is the primary health risk of trihalomethanes? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

51. What information is required on the tag during a switch lock-out? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

52. Which of the following provides a profile of hazardous substances or mixtures? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

53. What type of personal protective equipment should an operator wear when handling hypochlorites? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

54. Permit-required confined space entry requires ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

55. The SDWA defines a public water system that supplies piped water for human consumption as one that has ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

56. The most common water complaints are taste, odor, and ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

57. What U.S. agency establishes drinking water standards? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

58. Why should the operator contact area companies with underground utilities before starting an underground repair job? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

59. According to the USEPA regulations, the owner or operator of a PWS that fails to comply with applicable monitoring requirements must give notice to the public within ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

60. Your department uses 80 units of an item per week. You are required to keep a 10-week reserve of the item at all times and it requires 4 weeks to obtain a new supply. What is the minimum reorder point? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

61. What is the maximum contaminant level goal for chloride? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

62. What is the median value of the following data: 100, 300, 580, 250, 275, 335, 580 ? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

63. The National Primary Drinking Water Regulations apply to drinking water contaminants that may have adverse effects on ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

64. Which of the following is considered an acute risk to health? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

65. Which of the following materials makes the best anode? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

66. Fire demand can account for what percent of the total capacity of a storage system? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

67. Fuel oils, gasoline, and other organic compounds may permeate which type of piping? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

68. What type of concrete reservoir is constructed much like a swimming pool, is rather shallow, and difficult to cover? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

69. Which of the following types of valve is used to throttle the flow of water? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

70. Which of the following service line materials may cause corrosion when connected to a brass valve? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

71. What is the name of the pipe that serves as the inlet and outlet to an elevated tank? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

72. What type of ductile-iron pipe joint is quickly assembled and is least expensive? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

73. Which class of fire involves sodium or magnesium? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

74. Which type of hydrant is hidden from public view? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

75. What is the health risk associated with nitrate in water? ,[object Object],[object Object],[object Object],[object Object],New England Water Works Association

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