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

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BACKFLOW PREVENTION ASSEMBLY

TESTER EXAM 2024 EDITION

Back flow prevention testing equipment should be accuracy verified at least every _______ - Correct Ans: ✔✔year A damaged or dirty disc or seat of an RPBA may account for ______ - Correct Ans: ✔✔A low first check differential Inconsistent, erratic test results found when testing a RPBA means that

• Correct Ans: ✔✔There is air in the assembly If you get "impossible" test kit readings when testing an assembly - Correct Ans: ✔✔First check to see if hoses are hooked up to the right test ports When testing a PVB, the air inlet valve does not open as the gauge drops to 0 - Correct Ans: ✔✔The air inlet disc is stuck to the seat in the up position To continue practicing the profession, grade 6 operators must complete CE before the expiration date of every ________ year renewal period - Correct Ans: ✔✔ 3

Nebraska regulations require that backflow prevention assemblies be tested ________ - Correct Ans: ✔✔Once each year If an RPBA dips continually from the vent, the problem could be ________ - Correct Ans: ✔✔The #1 check valve is faulty High hazard locations according to the NDHSS DPH regulations include _______ - Correct Ans: ✔✔Truck (water) loading stations Which statement is correct according to the Nebraska regulations - Correct Ans: ✔✔Annual testing is required for RPBAs` If the relief valve fails to open while testing a RPBA, the problem could be - Correct Ans: ✔✔A fouled sensing line Water leakage over the top of an AVB may be cause by _________ - Correct Ans: ✔✔A damaged or corroded guide A leaky check valve of a DCVA could be due to _________ - Correct Ans: ✔✔The guide members hanging up A problem sometimes after repairing a DCVA is _______ - Correct Ans: ✔✔A noisy vibration

A differential pressure relief vlave on an RPBA that failed after testing can have two _________ which must be inspected - Correct Ans: ✔✔Diaphragms When you have re-assembled an RPBA, __________ to detertime if the relief valve has closed - Correct Ans: ✔✔Stick your fingers into the discharge port The #2 test port of a DCVA is located - Correct Ans: ✔✔Between the #1 shutoff valve and the #1 check valve If after repairing a DCVA the device still does not test out "ok" - Correct Ans: ✔✔The device should be disassembled and the check valve seats re-cleaned The _____ found in the second check valve of an RPBA is different than in the first - Correct Ans: ✔✔Spring The backflow prevention assembly test report is required to be completed using the forms (if any) provided by the PWS having jurisidiction because _____ - Correct Ans: ✔✔The grade VI operator is actually a specialized (limited) PWS operator licensed work under the rules and regulations of a PWS

State drinking water regulations require fire protection sprinkler systems to comply with ______ - Correct Ans: ✔✔AWWA Manual M What is that Duke, Midwest, Watts and Barton all have in common - Correct Ans: ✔✔They all sell testing equipment for testing RPBAs When testing a PVB, the test gauge must be - Correct Ans: ✔✔At the same height of the assembly The air inlet valve of a PVB device - Correct Ans: ✔✔Is held open until sufficient pressure is applied inside the PVB Which method of protecting against high hazard back siphonage is the best - Correct Ans: ✔✔Air gap After a backflow prevention assembly has been tested, a copy of the certified results is provided to the ______ - Correct Ans: ✔✔Owner State regulations place the responsibility on the _______ for records of locations, type of backflow preventers, and record of repairs of back flow preventers - Correct Ans: ✔✔Consumer

When reassembling components after repairs are made to a backflow prevention device or assembly - Correct Ans: ✔✔An approved nontoxic lubricant may be used In order to be certain which device/assembly you are about to test, you should - Correct Ans: ✔✔Check and record the make, model, and serial number A water column 55 1./2" high will create a pressure of _______ psi at the bottom - Correct Ans: ✔✔ 2 To smooth a lightyly scratched check valve seat of a PVB, the best choice would be to use - Correct Ans: ✔✔Sand cloth NDHHS DPH regulations require that fire protection backflow prevention assemblies be tested - Correct Ans: ✔✔According to the Nebraska state fire marshal regulations When a DCVA whines or growls, it is probably due to - Correct Ans: ✔✔Air trapped in the covers The relief valve of a RPBA must be able to operate - Correct Ans: ✔✔To maintain the zone between the two check valves at least 2 psi less than the supply pressure

DCVA and RPBA installations require ________ minimum clearance below the assembly and a maximum of _________ above ground, work floor, or permanent working platform - Correct Ans: ✔✔1' 5' A consumer claims his DCVA must be causing a steady reduction of pressure over the last 6 months. Your option might be to - Correct Ans: ✔✔Replace the service line because its probably full of scale When testing the #2 check valve on a RPBA against reverse of flow, install the high hose on the _______ test cock - Correct Ans: ✔✔# Line pressure fluctuation can cause problems when testing backflow prevention assemblies, if this is the case, an experienced grade VI water operator will likely - Correct Ans: ✔✔Schedule testing when pressure are more steady and take the highest reading A differential pressure gauge described in the Nebraska standards for testing backflow preventers should be designed for ________ - Correct Ans: ✔✔ 0 - 15 PSID A water heater thermal expansion control is required by ______ when a containment device/assembly is installed - Correct Ans: ✔✔some plumbing codes

The _______ test port is located between the two check valves on a RPBA - Correct Ans: ✔✔# The RPBA and DCVA must be installed - Correct Ans: ✔✔At least 12" above ground or work floor Atmospheric pressure at sea level is about ______ psi - Correct Ans: ✔✔14. When a RPBA relief valve assembly is put back into the body, a good way to check it for proper movement is to - Correct Ans: ✔✔Simply push on the diaphragm plate When a person is licensed to test backflow preventers, he/she is also licensed to - Correct Ans: ✔✔repair them A PWS practicing containment to protect the water system from cross connections encounters an unprotected tap between the meter and the backflow prevention assembly. In this situation.... - Correct Ans: ✔✔The installation should not be approved

Threaded hose bib faucets are potential cross connections, but technically can be brought into compliance by... - Correct Ans: ✔✔Filing of the threads so that a hose cannot be attached To be certain that a backflow preventer is approved for the particular installation... - Correct Ans: ✔✔Contact the PWS Although not recommended because of the high risk of contamination, Nebraska standards describe mercury manometers can be used to calibrate - Correct Ans: ✔✔Differential pressure gauges Nebraska standards require that an RPBA have two independently operating check valves with a ______ relief valve located between the check valves - Correct Ans: ✔✔Mechanically independent Nebraska standards require that the DCVA must have to be tightly closing _______ shut off valves four _______ test ports - Correct Ans: ✔✔Resilient seated Resilient seated For all backflow assemblies.... - Correct Ans: ✔✔There is no test port down stream from shut off valve #

For the flow rates specified in the Nebraska standards, the maximum pressure loss allowed for all sizes of DCVA is..... - Correct Ans: ✔✔ 10 psi If an RPBA contiunually drips or drains under full flow conditions - Correct Ans: ✔✔The #2 check valve is fouled When a residential property has a backflow-prevention device/assembly installed on the service line the best means to control thermal expansion is with a - Correct Ans: ✔✔Thermal expansion tank According to the Nebraska regulations what is the minimum acceptable air gap for a 2" pipe located 1" from the wall - Correct Ans: ✔✔6" The RPBA must have a provision to drain away at least _____ times the rated flow of the assembly - Correct Ans: ✔✔ 4 When velocity of the water flowing in a service pipe increases, the pressure available at the consumers tap _________ - Correct Ans: ✔✔Decreases The second check valve of a DCVA has become distorted. What could have caused this? - Correct Ans: ✔✔Water hammer

The RPBA #1 check valve is ___________ - Correct Ans: ✔✔A heavier spring than used in the #2 check valve The check valve spring of a PVB ________ - Correct Ans: ✔✔Closes the check valve The _____ test cock of an RPBA is located on the inlet side of the assembly - Correct Ans: ✔✔# If a 10" RPBA doesnt test properly - Correct Ans: ✔✔Check to see if the downstream gate valve is leaking