Back Flow Practice Test 100 with All Answers Verified correctly, Exams of Water Resources Planning and Management

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Back Flow Practice Test 100 with All

Answers Verified correctly

1. Does not constitute an actual health hazard although the quality of the water is impaired with respect to taste, odor, or utility. A. health hazard (high) B. pulution C. degree of hazard D. toxic substance - Correct Ans: ✔✔B. pollution
2. Any liquid, solid, or gas, which when introduced into the water supply, creates, or may create, a danger to the health and well being of the consumer. A. contamination B. Health hazard (high) C. health hazard (low) D. toxic substance - Correct Ans: ✔✔D. toxic substance
3. A determination on whether the substance in the nonpotable system is toxic or nontoxic A. degree of hazard B. health hazard (high) C. health hazard (low) D. toxic substance - Correct Ans: ✔✔A. degree of hazard

4. The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or outlet supplying water to a tank, and plumbing fixture. A. air gap B. submerged inlet C. backflow D. cross connection - Correct Ans: ✔✔A. air gap
5. An arrangement of pipes, fittings, or devices that introduces potable water into a nonpotable system below the flood level rim of a receptacle A. inlet B. outlet C. submerged inlet D. submerged outlet - Correct Ans: ✔✔C. submerged inlet
6. Does constitute an actual health hazard, the consumer being subjected to potentially lethal waterborne disease or illness A. degree of hazard B. contamination C. pollution D. toxic substance - Correct Ans: ✔✔B. contamination
7. Any arrangement of pipes, fittings, fixtures, or devices that connects a nonpotable system to a potable water system. A. cross connection B. criss siphonage C. backflow

D. degree of hazard - Correct Ans: ✔✔A. cross connection

8. The reversal of normal flow in a system due to an increase in the downstream pressure above that of the supply pressure. A. backpressure backflow B. backsiphonage backflow C. backflow D. backflow - Correct Ans: ✔✔A. backpressure backflow
9. An actual or potential threat of contamination of a physical or toxic nature to the potable water system to such a degree that there would be a danger to health. A. health hazard (high) B. health hazard (low) C. pollution D. contamination - Correct Ans: ✔✔A. health hazard (high)
10. Anti-siphon type water closer flush tank ballcock: A. 1002 B. 1003 C. 1001 D. 1011 - Correct Ans: ✔✔A. 1002
11. Reduce pressure principle backflow preventer A. 1024 B. 1015 C. 1014

12. Reduce pressure detector assembly backflow preventer

16. Backflow preventer with intermediate atmospheric vent A. 1020 B. 1013 C. 1019 D. 1012 - Correct Ans: ✔✔D. 1012
17. Dual check valve type backflow preventer (carbonated beverage) A. 1032 B. 1048 C. 1035 D. 1056 - Correct Ans: ✔✔A. 1032
18. Pipe applied atmospheric type vacuum breaker: A. 1019 B. 1001 C. 1011 D. 1002 - Correct Ans: ✔✔B. 1001
19. Pressure vacuum breaker assembly: A. 1020 B. 1024 C. 1015 D. 1012 - Correct Ans: ✔✔A. 1020
20. Hose connection vacuum breaker: A. 1102

21. Vacuum breaker wall hydrants, frost resistance, automatic

• D. 1013 - Correct Ans: ✔✔D.
• A.
• B.
• C.
• D. 1056 - Correct Ans: ✔✔B.
• A. 13. Double check backflow prevention assembly
• B.
• C.
• D. 1015 - Correct Ans: ✔✔D.
• A. 14. Double check detector assembly backflow preventer:
• B.
• C.
• D. 1047 - Correct Ans: ✔✔C.
• A. 15. Dual check valve type backflow preventer:
• B.
• C.
• D. 1025 - Correct Ans: ✔✔B.
• B.
• C.
• D. 1101 - Correct Ans: ✔✔C.
• A. draining type:
• B.
• C.
• D. 1019 - Correct Ans: ✔✔D.
• A. 22. Laborator Faucet vacuum breaker:
• B.
• C.
• D. 1034 - Correct Ans: ✔✔C.
• A. 23. Hose connection backflow preventer:
• B.
• C.
• D. 1047 - Correct Ans: ✔✔A.
• A. 24. Back siphonage vacuum breaker:
• B.
• C.

D. 1047 - Correct Ans: ✔✔B. 1056

25. True or False: A reduced pressure principle backflow assembly, when outside of the building should be in a pit to prevent freezing. - Correct Ans: ✔✔False
26. True or False: Both shutoff valves must be closed tightly when testing a reduced pressure principle backflow assembly - Correct Ans: ✔✔False
27. True or False: An occasional discharge discharge of water from the relief valve of a reduced pressure principle backflow assembly - Correct Ans: ✔✔True
28. True or False: A by-pass arrangement or jumper around a backflow preventer is considered to be a cross connection - Correct Ans: ✔✔True
29. True or False: Shutoff valve #2 must be closed tightly when testing a double check valve backflow assembly - Correct Ans: ✔✔True
30. True or False: Dual check valve type backflow preventers are approved for protection against pollution of the potable water system. - Correct Ans: ✔✔True

31. True or False: The amount of pressure loss across a reduced pressure principle assembly is the same as that of a double check valve assembly. - Correct Ans: ✔✔False
32. True or False: The proper type of backflow protection for a closed loop piping system containing ethylene glycol is a reduced pressure principle backflow assembly. - Correct Ans: ✔✔False
33. True or False: An atmospheric type vacuum breaker is approved for high hazard cross connections subject to back siphonage. - Correct Ans: ✔✔True
34. True or False: A properly engineered air gap separation would be a minimum of two times the diameter of the supply pipe above the LEVEL OF THE LIQUID - Correct Ans: ✔✔False
35. True or False: The relief valve of a reduced pressure principle backflow assembly must open to the atmosphere when the pressure differential across the first check valve is three pounds per square inch or less. - Correct Ans: ✔✔False
36. True or False: A solid waste connection is not permitted on the relief valve of a reduced pressure principle backflow assembly
    • Correct Ans: ✔✔False

37. True or False: A laboratory vacuum breaker is approved for high and low hazard backflow protection - Correct Ans: ✔✔False
38. True or False: A backflow preventer with an intermediate atmospheric vent is approved for protection against both back pressure and back siphonage. - Correct Ans: ✔✔True
39. True or False: An atmospheric type vacuum breaker may be used for low hazard cross connections subject to back pressure only. - Correct Ans: ✔✔False
40. True or False: A pressure vacuum breaker assembly may not be used for high hazard backflow protection. - Correct Ans: ✔✔False
41. True or False: A constant discharge of water from the relief valve of a reduced pressure principle backflow assembly indicates a malfunction within the device - Correct Ans: ✔✔True
42. True or False: In accordance with Ohio Plumbing code a backflow preventer with an intermediate atmospheric vent is approved for commercial boilers, provided, no chemicals are used. - Correct Ans: ✔✔False

43. True or False: Because of no visible indication of failure, a double check valve backflow assembly is not approved for high hazard cross connections - Correct Ans: ✔✔True
44. True or False: A pressure vacuum breaker assembly is approved for protection against back pressure and back siphonage backflow - Correct Ans: ✔✔False
45. The type of protection provided by a barometric loop is: A. an atmospheric break B. preventing loss of prime on a pump C. preventing back pressure backflow D. preventing back siphonage backflow E. preventing service connection contamination - Correct Ans: ✔✔D. preventing back siphonage backflow
46. All vacuum breakers are designed to: A. prevent back pressure backflow B. prevent back siphonage C. prevent atmosphere from entering the downstream system D. induce a siphon E. induce back pressure - Correct Ans: ✔✔B. Prevent back siphonage
47. All backflow preventer check valves must be drip tight when the: A. when the supply pressure drops below 8 p.s.i

B. positive differential is less than 2 p.s.i C. tester creates a venturi during the test D. device is subjected to any backflow E. inlet shut off valve is closed before the outlet valve - Correct Ans: ✔✔D. device is subjected to any backflow

48. A leak in the underground water distribution piping may: A. allow the contamination of the system from backflow B. be the result of a fouled backflow preventer C. increase the system pressure at the point of the leak D. not be considered a cross contamination - Correct Ans: ✔✔A. allow the contamination of the system from backflow
49. Backflow may be described as either: A. back pressure or back siphonage B. contamination or pollution C. high or low hazard D. containment or isolation E. zone or supply pressure - Correct Ans: ✔✔A. back pressure of back siphonage
50. The term that described water quality as a health hazard as a result of backflow is: A. back pressure B. contamination C. cross connection D. pulltuion

E. system hazard - Correct Ans: ✔✔B. contamination

51. Back siphonage in the water distribution system may be caused by: A. an elevated storage tank B. low seasonal demand C. ruptured piping D. pressure reducing valves E. a piping restriction due to corrosion - Correct Ans: ✔✔C. reptured piping
52. Backflow protection provided by a barometric loop is primarily: A. low hazard only- back siphonage B. high hazard- back pressure and back siphonage C. low hazard- back pressur eonly D. high hazard- back pressure only E. low or high hazard- back siphonage - Correct Ans: ✔✔E. low or high hazard- back siphonage
53. The type of protection required for a non-chemical fire sprinkler system is a(n): A. air gap separation B. reduced pressure principle assembly C. double check detector assembly D. pressure vacuum breaker assembly E. reduced pressure principle detector assembly - Correct Ans: ✔✔C. double check detector assembly

54. The type of protection required for a solar heating system containing ethylene glycol is a(n): A. air gap separation B. atmospheric type vacuum breaker C. reduced pressure principle assembly D. pressure vacuum breaker assembly E. double check valve assembly - Correct Ans: ✔✔A. air gap separation
55. Type of protection required for the potable water system in a waste water treatment plant where the system is used for pump seal water is a(n): A. reduced pressure principle assembly B. atmospheric type vacuum breaker C. double check valve assembly D. pressure vacuum breaker assembly E. air gap separation - Correct Ans: ✔✔E. air gap separation
56. No underground pit or vault should be entered before the: A. water supply has been shut off B. atmosphere has been tested C. flow rate has been determinded D. water utility has been notified E. the test form is filled out - Correct Ans: ✔✔B. atmosphere has been tested

57. The most important step after testing a backflow assembly is: A. recording the test results B. removing the gauge hoses C. removing the test cock adapters D. returning the assembly to normal operating mode E. signing the test form - Correct Ans: ✔✔D. returning the assembly to normal operating mode
58. When testing a backflow prevention assmebly, the critical first step is to: A. flush the test cocks of dirt and debris B. install the test cock adapters C. inform the occupants the water will be turned off D. flush the air from the test equipment E. close the downstream test cocks - Correct Ans: ✔✔C. inform the occupants the water will be turned off
59. The pressure exerted at the base of a column of water two (2) feet high is: A. .217 p.s.i B. .433 p.s.i C. .866 p.s.i D. .002 p.s.i E. .299 p.s.i - Correct Ans: ✔✔C. .866 p.s.i
60. The term that describes the internal cross connection control is:

A. contamination B. pollution C. suppression D. isolation E. containment - Correct Ans: ✔✔D. isolation

61. The by-pass line of a backflow assembly must have a backflow device of equal: A. flow capacity B. corrosion resistance C. length D. diameter E. protection - Correct Ans: ✔✔E. protection
62. The venturi principle suggests that as the water velocity in a pipe increased, the pressure will: A. create back pressure B. decrease C. remain the same with regard to flow rate D. increase E. compress the volume of water - Correct Ans: ✔✔B. decrease
63. The State of Ohio Plumbing Code requires that all double check valve backflow assemblies be tested at the time of installation and at least once every: A. 12 months B. 24 months

C. 36 months D. 48 months E. 60 months - Correct Ans: ✔✔A. 12 months

64. The type of backflow protection required for a limited area fire sprinkler system containing any additive is a(n): A. air gap separation B. dual check valve type backflow preventer C. double check valve backflow assembly D. pressure vacuum breaker assembly E. reduced pressure principle backflow assembly - Correct Ans: ✔✔E. reduced pressure principle backflow assembly
65. The minimum air gap separation in accordance with accepted engineering practice for a potable water supply system is: A. 0.25 inches B. 0.50 inches C. 1.00 inches D. 1.50 inches E. 2.00 inches - Correct Ans: ✔✔C. 1.00 inches
66. An air gap separation is measured from the end of the discharge piping to the: A. fixture drain B. side of the tank or vessel C. flood level rim of the receiving vessle D. floor

E. weir of the fixture trap - Correct Ans: ✔✔C. flood level rim of the receiving vessle

67. The type of backflow protection provided by an air gap separation is: A. back pressure- high hazard only B. back siphonage- high hazard only C. back pressure- low hazard only D. back siphonage- low hazard only E. back siphonage- high and low hazard - Correct Ans: ✔✔E. back siphonage- high and low hazard
68. In accordance with A.S.S.E. Standards, an atmospheric type vacuum breaker may not be pressurized for more than: A. one hour B. two hours C. six hours D. twelve hours E. twenty four hours - Correct Ans: ✔✔D. twelve hours
69. In accordance with A.S.S.E. Standards, the critical level for installation of an atmospheric type vacuum breaker above the highest point of downstream use is a minimum of: A. six inches B. twelve inches C. eighteen inches D. twenty four inches E. thirty inches - Correct Ans: ✔✔A. six inches

70. If the critical level of an atmospheric type vacuum breaker is not marked, the level is considered to be: A. air inlet valve B. top of the device C. check valve outlet D. bottom of the device E. device body outlet - Correct Ans: ✔✔D. bottom of the device
71. A back siphonage vacuum breaker is approved backflow protection for: A. back pressure- low hazard only B. back siphonage- intermittent pressure only C. back pressure- continuous pressure D. back siphonage- high hazard only E. back siphonage- continuous pressure - Correct Ans: ✔✔B. back siphonage- intermittent pressure only
72. An acceptable downstream installation from an atmospheric type vacuum breaker is a(n): A. submerged inlet two feet below the device B. irrigation system zone control valve C. quick closing solenoid valve D. garden hose nozzle E. pneumatic control valve - Correct Ans: ✔✔A. submerged inlet two feet below the device

73. The type of backflow protection provided by a dual check valve type backflow preventer is: A. back siphonage- low hazard only B. back pressure only- high and low hazard C. back siphonage only- high and low hazard D. back pressure and back siphonage- high and low hazard E. back pressure and back siphonage- low hazard only - Correct Ans: ✔✔E. back pressure and back siphonage- low hazard only
74. In accordance with A.S.S.E. standards, the critical level for installation of a pressure vacuum breaker above the highest point of downstream use is a minimum of: A. six inches B. twelve inches C. eighteen inches D. twenty four inches E. thirty inches - Correct Ans: ✔✔B. twelve inches
75. Pressure vacuum breaker assembly shut off valves: A. are not considered part of the assembly B. are not used during the field test of the assembly C. are not required to be drip tight D. are located on the inlet and outlet of the assembly E. contain an inlet valve test cock on all assemblies - Correct Ans: ✔✔D. are located on the inlet and outlet of the assembly

76. The air inlet valve of a pressure vacuum breaker assembly must open to the atmosphere at a differential pressure across the valve of not less than: A. 1.0 p.s.i gauge B. 2.0 p.s.i atomospheric C. 1.0 p.s.i absolute D. 2.0 p.s.i gauge E. 1.0 p.s.i atmospheric - Correct Ans: ✔✔A. 1.0 p.s.i gauge
77. In accordance with A.S.S.E. Standards, dual check valve type backflow preventers for carbonated beverage dispensers are approved for: A. back pressure- high hazard only B. back siphonage only- high and low hazard C. back pressure and back siphonage- high hazard D. back pressure and back siphonage- low hazard only E. back pressure only- high and low hazard - Correct Ans: ✔✔D. back pressure and back siphonage- low hazard only
78. Pressure vacuum breaker assemblies are approved for the following applications: A. back pressure and containment B. back pressure and isolation C. back siphonage and containment D. back siphonage and isolation E. back pressure and back siphonage - Correct Ans: ✔✔D. back siphonage and isolation

79. The check valve of a pressure vacuum breaker assembly must remain drip tight with an upstream pressure of at least 1.0 p.s.i gauge and a downstream pressure of: A. .0 ps.i gauge B. 1.0 p.s.i gauge C. 1.0 p.s.i absolute D. 2.0 p.s.i gauge E. 2.0 p.s.i absolute - Correct Ans: ✔✔A. .0 p.s.i gage
80. The number one test cock on a pressure vacuum breaker assembly is located between the check valve and the: A. air inlet valve B. downstream check valve C. inlet shut off valve D. number two test cock E. outlet shut off valve - Correct Ans: ✔✔C. inlet shut off valve
81. In accordance with A.S.S.E Standards, if not marked, the critical level of a pressure vacuum breaker assembly is considered to be the level of the: A. check valve B. bottom of the device body C. discharge piping D. number one test cock E. number two test cock - Correct Ans: ✔✔B. bottom of the device body

82. The number two test cock of a pressure vacuum breaker assembly is located between the: A. downstream check valve and outlet shut off B. inlet shut off valve and check valve C. number one test cock and check valve D. outlet test cock and outlet shut off E. upstream check valve and air inlet valve - Correct Ans: ✔✔A. downstream check valve and outlet shut off
83. The number of standard test cocks on a double check valve detector assembly is: A. two B. three C. four D. six E. eight - Correct Ans: ✔✔A. two
84. A double check valve assembly is approved for: A. low hazard- back siphonage only B. low hazard- back pressure only C. low hazard- back pressure and back siphonage D. high hazard- back siphonage only E. high hazard- back pressure and back siphonage - Correct Ans: ✔✔C. low hazard- back pressure and back siphonage
85. The number one test cock of a double check valve assembly is located immediately: A. downstream of the inlet shut off valve

B. downstream of the outlet shut off valve C. upstream of the outlet shut off valve D. upstream of the inlet shut off valve E. downstream of the number one check valve - Correct Ans: ✔✔D. upstream of the inlet shut off valve

86. The number two test cock of a double check valve assembly is located immediately: A. upstream of the number one check valve B. upstream of the number one shut off valve C. downstream of the number two check valve D. upstream of the number two shut off valve E. downstream of the number one check valve - Correct Ans: ✔✔A. upstream of the number one check valve
87. The backflow testers certification is good for: A. 24 months B. 3 years C. 1 year D. 2 years E. 4 years - Correct Ans: ✔✔B. 3 years
88. When testing a double check valve assembly, the first step to be completed is: A. attach the high pressure hose to test cock number two B. close the inlet shut off valve C. flush water through all test cocks D. attach the low pressure hose to test cock number three

E. close the outlet shut off valve - Correct Ans: ✔✔C. flush water through all test cocks

89. When testing a reduced pressure principle backflow assembly: A. the number one shut off valve must be closed tightly B. the vent hose is not used C. the number two shut off valve must be left open D. the number two shut off valve must be closed tightly E. both shut off valves must be closed tightly - Correct Ans: ✔✔D. the number two shut off valve must be closed tightly
90. When testing a reduced pressure principle assembly, the relief valve must open to the atmosphere before the pressure differential reaches: A. 1.0 p.s.i.d or greater B. 1.5 p.s.i.d or greater C. 2.0 p.s.i.d or greater D. 2.5 p.s.i.d or greater E. 3.0 p.s.i.d or greater - Correct Ans: ✔✔C. 2.0 p.s.i.d or greater
91. A reduced pressure principle assembly relief valve senses the supply pressure and the: A. supply to number one shut off valve B. supply to the number two check valve C. supply to the number two shut off valve D. supply to outlet shut off valve

E. supply to the number one check valve - Correct Ans: ✔✔B. supply to the number two check valve

92. The type of test equipment used to test a reduced pressure principle assembly is a(n): A. forty two inch sigh tube B. duplex pressure gauge C. atmospheric pressure gauge D. pair of bourdon gages E. differential pressure gauge - Correct Ans: ✔✔E. differential pressure gauge
93. In accordance with Section 3745- 99 - 01 of the Ohio Administrative Code, all yard hydrants must: A. not be subjected to back pressure B. not be used for drinking and culinary purpose C. protect against ground water contamination D. not drain into the ground
94. E.. be used for auxiliary water supply only - Correct Ans: ✔✔C. protect against ground wanter contamination
95. In accordance with Section 3745- 95 - 07 of the Ohio Administrative Code, all booster pumps supplied from a public water system must be equipped with a pressure cut off switch that will shut off the pump when the pressure on the supply side of the pump reaches a minimum of: A. 10 p.s.i gauge B. 15 p.s.i gauge