BACKFLOW PREVENTION ASSEMBLY TESTER EXAM 2024, Exams of Water Resources Planning and Management

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BACKFLOW PREVENTION ASSEMBLY

TESTER EXAM 2024

A water supplier shall interrupt water service to a user/customer when

• Correct Ans: ✔✔A. Provisions in the cross-connection control ordinance or regulations are not met Backflow in a water distribution system can be caused by - Correct Ans: ✔✔C. Both A and B backpressure and backsiphonage An atmospheric vacuum breaker may have a downstream shut-off valve
• Correct Ans: ✔✔D. Under no circumstances The Federal Safe Drinking Water Act places the responsibility for the quality of the public water supply on which of the following - Correct Ans: ✔✔A. Water purveyor An approved air gap must have - Correct Ans: ✔✔D. Both B and C B.minimum 1" separation C. Two times the pipe diameter An unprotected bypass around a reduced pressure principle backflow prevention assembly - Correct Ans: ✔✔D. Never

The main concern of the water purveyor where an auxiliary water supply is utilized or maintained is to ensure - Correct Ans: ✔✔A. That backflow protection is provided at the water service connection A pressure vacuum breaker may be installed with a - Correct Ans: ✔✔A. Control valve downstream Multistory buildings may need a backflow prevention assembly installed - Correct Ans: ✔✔D. All of the above A: at the service connection B: on the fire suppression system C: when the building is ten or more stories high When toxic chemicals are added to the fire suppression system, which of the following is required to protect the potable water system - Correct Ans: ✔✔C. Reduced pressure principle backflow prevention assembly The administrative authority should maintain a record backflow prevention assemblies installed on the water distribution system - Correct Ans: ✔✔D. All of the above A: to verify that a backflow program is in place B: to compile performance data on specific locations and assemblies

C: to ensure minimum annual testing of backflow prevention assemblies A defensible backflow prevention program will maintain records on which of the following - Correct Ans: ✔✔D. All of the above A: backflow prevention assemblies within the system B: complete list of certified backflow assembly testers C: back flow prevention test reports In responding to a potential backflow incident, the water purveyor must - Correct Ans: ✔✔D. Implement emergency response plan The loading of the first and second check valves on reduced pressure principle backflow prevention assemblies - Correct Ans: ✔✔B. Always different Undersized water service and second check valves on reduces pressure principle back flow prevention assemblies - Correct Ans: ✔✔B. May cause backsiphonage due to aspirator effect A perfect vacuum (at sea level) will raise water in a pipe a maximum of - Correct Ans: ✔✔C. 33.9 feet

The water supplier may require more frequent testing of backflow prevention assemblies - Correct Ans: ✔✔D. All of the above A: due to high hazards B: due to high incidence of field test failures of the assembly C: due to frequent internal plumbing changes To properly field test a reduced pressure principle backflow prevention assembly - Correct Ans: ✔✔B. The outlet shut-off valves must be closed A differential pressure gauge is used to field test - Correct Ans: ✔✔D. Bath A and C A: reduced pressure principle backflow assemblies C: pressure vacuum breakers Performance designs require that the pressure relief valve opening point of a reduced pressure principal backflow assembly must open at or above the minimum of - Correct Ans: ✔✔B. Two (2) psid When field testing a reduced pressure principle backflow assembly, the number two test cock should be flushed - Correct Ans: ✔✔D. With caution to prevent premature opening of relief valve

During a field test, the air inlet valve on a pressure vacuum breaker must open - Correct Ans: ✔✔A. At or above 1 psid on a differential gauge Hose Bibb vacuum breakers should be located - Correct Ans: ✔✔B. On hose bibbs as required by code The probable cause of an Intermittent discharge of the differential pressure relief valve on a reduced pressure relief valve on a reduced pressure principle backflow assembly in a NO FLOW condition is - Correct Ans: ✔✔A. Fluctuation in supply line pressure When entering a vault containing a backflow prevention assembly, the tester should - Correct Ans: ✔✔A. Check quality of the atmosphere prior to entry A service protection backflow prevention assembly is meant to protect

• Correct Ans: ✔✔C. Public water distribution system A vacuum breaker can be used to protect against - Correct Ans: ✔✔B. Backsiphonage A tester is required to report backflow prevention field test information to - Correct Ans: ✔✔D. Both A and C A: administrative authority

C: the owner of the backflow assembly Backflow prevention assemblies should be tested - Correct Ans: ✔✔D. When required by local administrative authority Backflow prevention assemblies should be repaired - Correct Ans: ✔✔A. When field test results indicates failure Check valves of approved double check valve backflow prevention assemblies must be - Correct Ans: ✔✔B. Internally loaded A vacuum relief valve should be installed - Correct Ans: ✔✔D. Never used as a backflow prevention assembly When repairing backflow prevention assemblies, hazardous conditions could be created by which of the following - Correct Ans: ✔✔D. Bath A and B A: substitution of non factory parts B: use of petroleum jelly A backflow prevention assembly should make and abnormal humming noise during operation under which of the following - Correct Ans: ✔✔D. Never

The accuracy of the test gauges should be checked - Correct Ans: ✔✔D. Both B and C B: at a minimum annually C: as required by local jurisdiction Test cocks on reduced pressure principle backflow prevention assemblies are intended for - Correct Ans: ✔✔A. Field test purposes The air gap drain for the differential pressure relief valve of a reduced pressure principle backflow prevention assembly - Correct Ans: ✔✔C. May not be sufficient to handle the full discharge of the backflow prevention assembly How many test cocks are there on an approved pressure vacuum breaker - Correct Ans: ✔✔A. Two An approved atmospheric vacuum breaker must be installed - Correct Ans: ✔✔A. 6 inches above highest outlet and all downstream piping A duplex pressure gauge is used to test - Correct Ans: ✔✔B. Double check valve assemblies The major cause of backflow are - Correct Ans: ✔✔D. Both b and c B: cross-connections

C: backpressure and backsiphonage conditions Water main break can introduce the possibility of what type of backflow - Correct Ans: ✔✔D. Both a and c A: back pressure C: backsiphonage A reduced pressure principle backflow prevention assembly shall be installed - Correct Ans: ✔✔C. Readily accessible above grade Which component of a pressure vacuum breaker must be field tested first - Correct Ans: ✔✔D. The air inlet valve Each of the check valves in a double check valve assembly is designed to hold in the direction of flow a minimum static pressure of - Correct Ans: ✔✔A. 1 psi An absolute pressure of 25 psia (at sea level) is equal to approximately what value in gauge pressure(Psig) - Correct Ans: ✔✔A. 10 psig Results of a field test on a backflow prevention assembly should include which of the following information on the report - Correct Ans: ✔✔D. All of the above A: unit identification

B: test gauge readings C: tester identification To properly field test a reduced pressure principal backflow prevention assembly - Correct Ans: ✔✔A. The inlet shut-off valve must be open A pressure vacuum breaker may be used for backflow protection for which of the following conditions - Correct Ans: ✔✔C. Backsiphonage of low hazards The differential pressure relief valve of reduced pressure principle backflow prevention assembly discharges in a static no flow condition, the most likely cause is - Correct Ans: ✔✔A. Fouled check valve # According to most plumbing codes, a two in atmospheric vacuum breaker, used on irrigation systems, shall be installed at least ___________ Inches above down stream piping outlets - Correct Ans: ✔✔D. None of the above A: 3 B: 5 C: 18 When field testing a check valve in a double check valve assembly using a duplex gauge, both gauge needles drop together approximately 15psi

before a 2 psi separation can be achieved. This gauge reaction may be caused by - Correct Ans: ✔✔D. High barometric pressure During the field test of a reduced pressure principle backflow assembly the tester determines that the number 2 check valve is fouls. Proper procedure is to have the check valve repaired and - Correct Ans: ✔✔D. Retest the entire assembly and complete the test form An approved backflow prevention assembly consisting of two independently operating, Internally loaded check valves located between two tightly closing shut off valves, with four appropriately located test cocks is a - Correct Ans: ✔✔B. Double check valve assembly A reduces pressure principle backflow prevention assembly must be installed - Correct Ans: ✔✔A. 12 inches above floor Recently edible syrup in a cannery was forced into a drinking water line through a direct cross connection. The syrup in the line was under pressure from a recirculating pump. Future occurrences of backflow can be prevented by the installation of - Correct Ans: ✔✔A. Double check valve assembly To properly solve a cross connection contamination incident, a qualified person should - Correct Ans: ✔✔D. All of the above A: identify and isolate the source of contamination

B: Identify and isolate the affected area C: notify customers and take water samples Pressure can be expressed in "feet of head" as well as the more common pounds per square inch. To convert feet of head to psi you must - Correct Ans: ✔✔A. Multiply by. The physical operation of a hose in vacuum breaker is classified as a type of - Correct Ans: ✔✔A. Atmospheric vacuum breaker Many companies utilize a contaminated auxiliary water supply to maintain high fire protection pressure. To protect the potable water supply what protection should be installed at the service connection - Correct Ans: ✔✔D. Reduced pressure principle backflow prevention assembly When field testing a backflow prevention assembly in a confined space which of the following guidelines should be followed - Correct Ans: ✔✔D. All of the above A: utilize a flashlight and hard hat B: assembly should be tested by two person team C: ensure atmosphere is safe

Shut Off valves on which of the following must be opened and closed slowly to prevent water hammer - Correct Ans: ✔✔D. All assemblies It is possible to compensate for a leaky number 2 shut off valve during the field test of a reduced pressure principle backflow prevention assembly by attaching a temporary bypass hose from - Correct Ans: ✔✔B. #1 test cock to #4 test cock When field testing a pressure vacuum breaker near a ceiling the test kit should - Correct Ans: ✔✔A. Be placed at the same elevation as the assembly Which of the following devices could create a closed water system if installed in the service supply line - Correct Ans: ✔✔D. All of the above A: check valve B: backflow prevention assembly C: pressure reducing valve A total cross connection program should be coordinated with - Correct Ans: ✔✔D. All of the above A: plumbing inspector B: local health department C: water purveyor

Which of the following I'm not a cross connection hazard - Correct Ans: ✔✔D. Hand held shower on a 1/2 inch line that terminates 2 inches above the rim of the tub Which of the following conditions would not be a cross connection hazard - Correct Ans: ✔✔A. A reduced pressure principle assembly, installed on a cooling tower feed line that is tested twice a year The maximum head loss across a double check valve from zero to rates flow is - Correct Ans: ✔✔B. 10 psi During the field test of the #2 check valve on a reduced pressure principle backflow assembly the "control or bypass needle valve is inadvertently left open the differential pressure gauge. This procedure will - Correct Ans: ✔✔B. Cause the differential pressure to drop and cause the relief valve to open During the field test of the check valve in a pressure vacuum breaker the "high bleed" needle valve is left opened. This procedure will - Correct Ans: ✔✔A. Reduce the pressure differential between the check valve and the #1 shut off valve to 0 psid When conducting the Initial test on the #1 check valve of a double check valve assembly, a tester notes that the upstream gauge reading rises to meet the downstream gauge reading which remains constant. This is an indication of - Correct Ans: ✔✔C. A leaking #1 shut off valve

The confirmation test on a double check valve assembly using a duplex gauge requires the upstream and downstream pressure to be lowered approximately 10psi. This drop is accomplished by - Correct Ans: ✔✔B. Loosening the hose on the down stream test cock After the Installation of a reduced pressure principle backflow assembly the #1 shut off valve is turned on to establish water pressure with in the assembly. Upon opening the #1 shut off valve the relief valve discharges continuously. This discharge is an Indication of - Correct Ans: ✔✔D. Both a and b A: a fouled relief valve B: fouled #1 check valve The spring on the differential pressure relief valve of a reduced pressure principle assembly tends to - Correct Ans: ✔✔C. Open the relief valve A duplex gauge can best be described as - Correct Ans: ✔✔C. Two pressure gauges in one gauge head with one having a bypass house When isolating a double check valve assembly for a field test with a duplex gauge the tester must - Correct Ans: ✔✔C. Attach the gauge hoses, close the downstream shut off valve first, then close the upstream shut off valve

A differential pressure gauge should be checked for accuracy through the use of - Correct Ans: ✔✔B. Two water columns or a mercury manometer When the water continues to flow from the open test cock during the test of the check valve on a pressure vacuum breaker this is an indication of - Correct Ans: ✔✔A. Leaking #1 shut off valve Any pressure less than that exerted by the atmosphere is defined as a - Correct Ans: ✔✔B. Vacuum Performance design specifications of a reduced pressure principle backflow prevention assembly require that the differential pressure across the #1 check valve be _______ psid greater than the opening psid of the relief valve - Correct Ans: ✔✔D. 3psi How many test cocks are there on an approved reduced pressure principle backflow prevention assembly - Correct Ans: ✔✔C. 4 The differential pressure relief valve of a reduced pressure principle backflow assembly discharges continuously during both flow and no flow conditions. The most probable cause is - Correct Ans: ✔✔C. Fouled relief valve

The proper position of the test gauge hoses for the Initial test of a reduced pressure principle backflow assembly - Correct Ans: ✔✔C. High side hose to #2 test cock low side hose to #3 test cock To exert a pressure of one psi at the base of a column of water the column would have to be - Correct Ans: ✔✔C. 27.75 inches high A certified backflow preventer test and repair technician is a ______ water system operator - Correct Ans: ✔✔C. Grade 6 Water system operator grades 1,2,3,4 and 6 must renew their certification every ______ years - Correct Ans: ✔✔D. 2 Continuing education requirements for recertification - Correct Ans: ✔✔B. Test at least 12 backflow preventers in the previous year Any______ seminars or workshops are normally approved for backflow technician recertification credit - Correct Ans: ✔✔C. Cross connection control All garden hose bibbs are required to have hose Bibb vacuum breakers - Correct Ans: ✔✔A. Only if the local water system chooses to go to "isolation" in its cross connection control program

All residential properties must have ________ on their service lines - Correct Ans: ✔✔D none of the above unless required by the public water supply system If hose bibbs vacuum breakers were installed on every outlet threaded to receive a hose_____ percent of the cross connections would be eliminated - Correct Ans: ✔✔C. 90 The safe drinking act considers a water system to be "public" when it serves_______ or more persons or has______ or more connections - Correct Ans: ✔✔A. 25..... Nebraska regulations require pressure vacuum breakers to be installed ____ inches above the highest outlet - Correct Ans: ✔✔C. 12 All testable backflow a preventers must be tested at least upon installation and ever ______ months thereafter - Correct Ans: ✔✔C. 12 Double check and reduced pressure backflow preventer installation require _______ clearance below the device and a maximum of ______ above the ground, work floor or permanent working platform - Correct Ans: ✔✔C. 1 foot ...5 feet

Fire sprinkler system shall be equipped with backflow preventers - Correct Ans: ✔✔B. According to the public water supply systems, but not less than per AWWA manual M When a person is certified to test backflow preventers he/she is also certified to - Correct Ans: ✔✔A. Repair them An example of a backsiphonage threat - Correct Ans: ✔✔D. All of the above A: booster pump B: fire hydrant C: yard hydrant An example of backpressure threat - Correct Ans: ✔✔D. All of the above A: pneumatic tank with pump out of service B: boilers C: high riser apartment buildings with booster pump out of service