Backflow Test Questions and Answers 2024

Backflow Test Questions and Answers 2024 If an RPBA contiunually drips or drains under full flow conditions 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 Thermal expansion tank Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:08 / 0:15 Full screen Brainpower Read More According to the Nebraska regulations what is the minimum acceptable air gap for a 2" pipe located 1" from the wall 6" The RPBA must have a provision to drain away at least _____ times the rated flow of the assembly 4 When velocity of the water flowing in a service pipe increases, the pressure available at the consumers tap _________ Decreases The second check valve of a DCVA has become distorted. What could have caused this? Water hammer The RPBA #1 check valve is ___________ A heavier spring than used in the #2 check valve The check valve spring of a PVB ________ Closes the check valve The _____ test cock of an RPBA is located on the inlet side of the assembly #1 If a 10" RPBA doesnt test properly Check to see if the downstream gate valve is leaking Back flow prevention testing equipment should be accuracy verified at least every _______ year A damaged or dirty disc or seat of an RPBA may account for ______ A low first check differential Inconsistent, erratic test results found when testing a RPBA means that There is air in the assembly If you get "impossible" test kit readings when testing an assembly 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 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 3 Nebraska regulations require that backflow prevention assemblies be tested ________ Once each year If an RPBA dips continually from the vent, the problem could be ________ The #1 check valve is faulty High hazard locations according to the NDHSS DPH regulations include _______ Truck (water) loading stations Which statement is correct according to the Nebraska regulations Annual testing is required for RPBAs` If the relief valve fails to open while testing a RPBA, the problem could be A fouled sensing line Water leakage over the top of an AVB may be cause by _________ A damaged or corroded guide A leaky check valve of a DCVA could be due to _________ The guide members hanging up A problem sometimes after repairing a DCVA is _______ A noisy vibration A differential pressure relief vlave on an RPBA that failed after testing can have two _________ which must be inspected Diaphragms When you have re-assembled an RPBA, __________ to detertime if the relief valve has closed Stick your fingers into the discharge port The #2 test port of a DCVA is located Between the #1 shutoff valve and the #1 check valve If after repairing a DCVA the device still does not test out "ok" 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 Spring The backflow prevention assembly test report is required to be completed using the forms (if any) provided by the PWS having jurisidiction because _____ 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 ______ AWWA Manual M14 What is that Duke, Midwest, Watts and Barton all have in common They all sell testing equipment for testing RPBAs When testing a PVB, the test gauge must be At the same height of the assembly The air inlet valve of a PVB device Is held open until sufficient pressure is applied inside the PVB Which method of protecting against high hazard back siphonage is the best Air gap After a backflow prevention assembly has been tested, a copy of the certified results is provided to the ______ Owner State regulations place the responsibility on the _______ for records of locations, type of backflow preventers, and record of repairs of back flow preventers Consumer When reassembling components after repairs are made to a backflow prevention device or assembly An approved nontoxic lubricant may be used In order to be certain which device/assembly you are about to test, you should 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 2 To smooth a lightyly scratched check valve seat of a PVB, the best choice would be to use Sand cloth NDHHS DPH regulations require that fire protection backflow prevention assemblies be tested According to the Nebraska state fire marshal regulations When a DCVA whines or growls, it is probably due to Air trapped in the covers The relief valve of a RPBA must be able to operate 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 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 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 #2 Line pressure fluctuation can cause problems when testing backflow prevention assemblies, if this is the case, an experienced grade VI water operator will likely 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 ________ 0-15 PSID A water heater thermal expansion control is required by ______ when a containment device/assembly is installed some plumbing codes