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Backflow Prevention Assembly Tester

Training – GA Exam 2024 Edition

1. What is a cross connection? - Correct Ans: ✔✔Any arrangement of pipes, fittings, fixtures, or devices that connects a non-potable system to a potable water system
2. What does DCVA stand for? - Correct Ans: ✔✔Double Check Valve Assembly
3. What is a DCVA? - Correct Ans: ✔✔A testable mechanical device consisting of two independently operating, spring-loaded check valves
4. What is feed water? - Correct Ans: ✔✔Water that is added to a commercial or industrial system and is subsequently used by the system, such as water that is fed to a boiler to produce steam
5. What is an incubation period for a disease? - Correct Ans: ✔✔The time period that elapses between the time a person is exposed to some disease and the time that person shows the first sign or symptom of the disease

6. What is an overflow level? - Correct Ans: ✔✔The maximum height that water or liquid will rise in a receptacle before it flows over the rim
7. What is a potable water source? - Correct Ans: ✔✔Water that is biologically, chemically, and radiologically safe to drink
8. What is a potential cross connection? - Correct Ans: ✔✔Any arrangement of pipes, fittings, or devices that indirectly connects a potable water supply to a non-potable water source
9. What does PVB stand for? - Correct Ans: ✔✔Pressure Vacuum Breaker
10. What is a PVB? - Correct Ans: ✔✔A device designed to prevent backsiphonage, consisting of once independently operating spring-loaded check valve and an independently operating spring-loaded air-inlet valve
11. What does RPBP stand for? - Correct Ans: ✔✔Reduced Pressure Backflow Preventer
12. What does RPZBP stand for? - Correct Ans: ✔✔Reduced Pressure Zone Backflow Preventer

13. What is an RP? - Correct Ans: ✔✔A mechanical device consisting of two independently operating, spring-loaded check valves with a reduced pressure zone between the check valves
14. Containment - Correct Ans: ✔✔Protection on the service line - protects the potable water supply and not the customer
15. Isolation - Correct Ans: ✔✔Protection on individual sources of hazard - provides internal protection
16. Does GA law require containment or isolation? - Correct Ans: ✔✔Containment
17. Organism that causes salmonellosis - Correct Ans: ✔✔Salmonella
18. Symptom(s) of salmonellosis - Correct Ans: ✔✔Acute diarrhea and vomiting
19. Organism that causes bacillary dysentery - Correct Ans: ✔✔Shigella
20. Symptom(s) of bacillary dysentery - Correct Ans: ✔✔Diarrhea

21. Organism that causes Legionnaires' Disease - Correct Ans: ✔✔Legionella
22. Symptom(s) of Legionnaires' Disease - Correct Ans: ✔✔Acute respiratory disease
23. Organism that causes Hepatitis A - Correct Ans: ✔✔Hepatitis A virus
24. Symptom(s) of Hepatitis A - Correct Ans: ✔✔Yellowed skin, enlarged liver, abdominal pain-low mortality, lasts up to 4 months
25. Organism that causes Giardiasis - Correct Ans: ✔✔Giardia lamblia
26. Symptom(s) of Giardiasis - Correct Ans: ✔✔Diarrhea, cramps, nausea, and general weakness-not fatal
27. Organism that causes Cryptosporidiosis - Correct Ans: ✔✔Cryptosporidium Parvuum

28. Symptom(s) of Cryptosporidiosis - Correct Ans: ✔✔Acute diarrhea, abdominal pain, vomiting, low grade fever - not treatable
29. Chemical hazard examples - Correct Ans: ✔✔Caustic Soda, Propane, Chromium, Fertilizers, Swimming Pool Water
30. What is a pollutant? - Correct Ans: ✔✔Non-health hazard - a substance that is aesthetically objectionable but will not cause illness or death
31. What is a contaminant? - Correct Ans: ✔✔Health hazard - a substance that will cause illness or death
32. Atmospheric pressure at sea level - Correct Ans: ✔✔14. psi
33. psia - Correct Ans: ✔✔pounds per square inch, absolute - the total pressure, that is the sum of gage pressure and atmospheric pressure
34. psig - Correct Ans: ✔✔pounds per square inch, gage - the pressure above atmospheric pressure

35. Required minimum system pressure in GA - Correct Ans: ✔✔20 psi
36. Maximum theoretical value water can be pulled up a water column - Correct Ans: ✔✔33.9 ft
37. _______ and _______ decrease pressure across a check valve - Correct Ans: ✔✔friction and restriction
38. Is a dual check an approved, testable backflow device? - Correct Ans: ✔✔No
39. Where are dual checks commonly installed? - Correct Ans: ✔✔Residential
40. What is the aspirator effect? - Correct Ans: ✔✔Fluids are pulled (siphoned) into a pipe due to the difference in pressure and velocity of the fluid at the union of the two pipes
41. As velocity increases, pressure _______ - Correct Ans: ✔✔Decreases

42. Venturi - Correct Ans: ✔✔Device that is specifically designed to create a low pressure region in order to measure velocity or create a suction
43. Direct cross connections are subject to ______ and _______
    • Correct Ans: ✔✔Backpressure and backsiphonage
44. Indirect cross connections are subject to ______ only - Correct Ans: ✔✔Backsiphonage
45. The purest and truest form of backflow prevention - Correct Ans: ✔✔Air gap
46. Distance of a proper air gap - Correct Ans: ✔✔2 times the diameter of the pipe, no less than 1 inch
47. Air gaps are approved to protect against: - Correct Ans: ✔✔Backsiphonage, backpressure, contaminants and pollutants
48. RP's are approved to protect against: - Correct Ans: ✔✔Backsiphonage, backpressure, contaminants and pollutants
49. One limitation of a DC assembly - Correct Ans: ✔✔Does not give any indication of failure unless tested

50. DC's are approved to protect against: - Correct Ans: ✔✔Backsiphonage, backpressure, pollutants
51. Where should a strainer be installed relative to a backflow prevention device? - Correct Ans: ✔✔Upstream of shut off valve

52. What kind of protection does a bypass line require? - Correct Ans: ✔✔Same level of protection as the main line (does not have to be the same manufacturer)
53. USC recommendation for installing RP's and DC's - Correct Ans: ✔✔Minimum of 12 inches above grade, maximum of 36 inches above grade
54. PVB's are approved to protect against: - Correct Ans: ✔✔Backsiphonage, pollutants and contaminants
55. PVB's must be installed _____ inches above the highest downstream point - Correct Ans: ✔✔12 inches
56. AVB's are approved to protect against: - Correct Ans: ✔✔Backsiphonage, contaminants, and pollutants

57. AVB's must be installed ____ inches above the highest downstream point - Correct Ans: ✔✔6 inches
58. Are AVB'S approved for continuous use? - Correct Ans: ✔✔No - no more than 12 hours in a 24 hour period
59. What does SVB stand for? - Correct Ans: ✔✔Spill Proof Vacuum Breaker
60. What does HVB stand for? - Correct Ans: ✔✔Hose Type Vacuum Breaker (non-testable)
61. Can thermal expansion cause backpressure? - Correct Ans: ✔✔Yes
62. Test kit gage faces read what PSID range? - Correct Ans: ✔✔ 0 - 15 PSID
63. What color is the high pressure hose? - Correct Ans: ✔✔Red

64. What color is the low pressure hose? - Correct Ans: ✔✔Traditionally green but new kits are blue
65. What color is the bypass/vent hose? - Correct Ans: ✔✔Traditionally black but new kits are yellow
66. How often do test kits have to be calibrated? - Correct Ans: ✔✔Minimum annually
67. The relief valve on a RP must open at a minimum PSID of _____ - Correct Ans: ✔✔2.0 PSID
68. Check valve #1 on a RP should hold a minimum PSID of _____ - Correct Ans: ✔✔Relief valve + 3.0 PSID
69. Check valve #2 on a RP should hold against backpressure and a minimum PSID of _____ - Correct Ans: ✔✔1.0 PSID
70. RPDA and DCDA detect what? - Correct Ans: ✔✔Low flows on lines that should not have flow indicating illegal taps or leaks
71. Why do we flush test cocks in the order "4, 3, 2, 1" on a RP?
    • Correct Ans: ✔✔To prevent it from dumping

72. The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2 and the dripping stops. What does that indicate? - Correct Ans: ✔✔You have a leaking check valve #2 under a backpressure condition
73. The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2 and the dripping does not stop. You then open test cock #4 to induce flow across the device and the dripping lets up or stops. What does that indicate? - Correct Ans: ✔✔You have a leaking check valve #
74. The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2 and the dripping does not stop. You then open test cock #4 to induce flow across the device and the dripping does not stop. What does that indicate? - Correct Ans: ✔✔You most likely have an issue with the relief valve. It could potentially be an issue with both check valve # and the relief valve
75. The RV on a RP drips steadily while the customer is using water. What does this indicate? - Correct Ans: ✔✔The RV leaks and/or the diaphragm is damaged
76. Check valve #1 on a DC assembly must hold a minimum PSID of _____ - Correct Ans: ✔✔1.0 PSID

77. Check valve #2 on a DC assembly must hold a minimum PSID of _____ - Correct Ans: ✔✔1.0 PSID
78. The maximum allowed pressure drop across a DC assembly according to AWWA is _____ - Correct Ans: ✔✔10 PSI
79. When testing for the PSID across check valve #1 on a DC assembly, the sight tube on test cock #3 does not stop flowing. What does that indicate? - Correct Ans: ✔✔Leaking shut off valve

80. When testing for the PSID across check valve #2 on a DC assembly, water recedes from the sight tube on test cock #4. What does that indicate? - Correct Ans: ✔✔Leaking shut off valve

81. The check valve on a PVB must close at _____ PSID - Correct Ans: ✔✔1.0 PSID
82. The air inlet valve on a PVB must open at _____ PSID - Correct Ans: ✔✔1.0 PSID
83. When testing the RV on a RP, the pressure differential on the gage drops but not to the RV opening point and the RV does

not open. What does this indicate? - Correct Ans: ✔✔Shutoff valve #2 is leaking creating a flow condition across the device preventing the RV from opening

84. When testing the RV on a RP, the pressure differential drops to zero and the RV does not open. What does this indicate? - Correct Ans: ✔✔High pressure sensing tube is clogged and/or the RV is stuck closed
85. What type of valve is used for the shut offs on backflow assembly devices? - Correct Ans: ✔✔Ball valves
86. True or False: Fluctuating line pressure can cause a RP to "spit" or discharge intermittently - Correct Ans: ✔✔True
87. The check valve on a SVB must close at a minimum of _____ PSID - Correct Ans: ✔✔1.0 PSID
88. The air inlet valve on a SVB must open at a minimum of _____ PSID - Correct Ans: ✔✔1.0 PSID
89. Is an AVB a testable device? - Correct Ans: ✔✔No

90. True or False: A bypass line around a backflow assembly is permitted as long as it is protected with the same level of protection - Correct Ans: ✔✔True
91. How many check valves are in a RP? - Correct Ans: ✔✔ 2
92. How many test cocks are on a RP? - Correct Ans: ✔✔ 4
93. How many check valves are in a DC? - Correct Ans: ✔✔ 2
94. How many test cocks are on a DC? - Correct Ans: ✔✔ 4
95. How many check valves are in a PVB? - Correct Ans: ✔✔ 1
96. How many air inlet valves are in a PVB? - Correct Ans: ✔✔ 1
97. How many test cocks are on a PVB? - Correct Ans: ✔✔ 2
98. How many check valves are in a SVB? - Correct Ans: ✔✔ 1
99. How many air inlet valves are in a SVB? - Correct Ans: ✔✔ 1

100. How many test cocks are on a SVB? - Correct Ans: ✔✔ 1
101. If the air inlet valve on a SVB is open when loosening the vent valve, what is leaking? - Correct Ans: ✔✔The check valve
102. Why might the high side bleed needle valve need to be opened more than 1/4 of a turn while testing the air inlet valve on a SVB? - Correct Ans: ✔✔Leaking shut off #
103. Why might the low side control valve need to be opened more than 1/4 of a turn when testing the RV opening point on a RP? - Correct Ans: ✔✔Leaking shut off #2 with water use downstream
104. When testing for the PSID across check valve #2 on a DC assembly, water continues to flow from the sight tube on test cock #4. What does that indicate (assuming nothing unusual was found while testing check valve #1)? - Correct Ans: ✔✔Shut off #2 is leaking with backpressure from the system
105. The shut off valves and test cocks on approved backflow prevention assemblies are required to be - Correct Ans: ✔✔Resilient seated

106. While testing the air inlet opening point on a PVB, the air inlet does not open and the gage drops to 0. What does this indicate? - Correct Ans: ✔✔Shutoff valve #2 is leaking
107. While testing the air inlet opening point on a PVB, the air inlet does not open and the gage does not drop to the air inlet opening point. What does this indicate? - Correct Ans: ✔✔Shutoff valve #1 is leaking
108. While testing the check valve closing point on a PVB water continues to flow out of test cock #2. What does this indicate? - Correct Ans: ✔✔Shutoff valve #1 is leaking
109. What is an actual cross connection? - Correct Ans: ✔✔Any arrangement of pipes, fittings, or devices that connects a potable water supply directly to a non-potable source at all times
110. What is an Air Gap? - Correct Ans: ✔✔The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or outlet supplying water to a tank, plumbing fixture, or other container, and the overflow rim of that container
111. What does AVB stand for? - Correct Ans: ✔✔Atmospheric Vacuum Breaker

112. What is an Atmospheric Vacuum Breaker? - Correct Ans: ✔✔A mechanical device consisting of a float check valve and an air-inlet port designed to prevent backsiphonage
113. What is an auxiliary supply? - Correct Ans: ✔✔Any water source or system, other than the potable water supply, that may be available in the building or premises
114. What is backflow? - Correct Ans: ✔✔A hydraulic condition, caused by difference in pressures, in which non-potable water or other fluids flow into a potable water system
115. What is backpressure? - Correct Ans: ✔✔A backflow condition in which a pump, elevated tank, boiler, 0r other means results in a downstream pressure greater than the supply pressure
116. What is backsiphange? - Correct Ans: ✔✔A backflow condition in which the pressure in the distribution system is less than atmospheric pressure (sub-atmospheric)
117. What is a bypass? - Correct Ans: ✔✔In cross-connection control, any pipe arrangement that passes water around a protective device, casing it to be ineffective

118. What is a carrier? - Correct Ans: ✔✔A human or animal that carries disease germs and can pass them to another person or animal without getting the disease itself
119. What is the purpose of a check valve? - Correct Ans: ✔✔To allow flow in only one direction