ASSE BACKFLOW RECERTIFICATION QUESTIONS AND ANSWERS LATEST UPDATE

ASSE BACKFLOW RECERTIFICATION QUESTIONS AND ANSWERS LATEST UPDATE A check valve in an approved backflow assembly must be tight when - Answers The assembly is subject to any backflow a leaking check valve may be caused by? - Answers Dirty or damaged check disc, damaged check seat, broken or damaged spring, guide members hanging up (all of the above) Test cock number one of an approved double check valve assembly is located - Answers Upstream on shutoff valve number one On an approved pressure vacuum breaker assembly, the shut off valves - Answers Are located at the inlet and outlet of all assemblies The bypass line of a backflow must contain an approved assembly of equal - Answers Temperature rating The bypass line of a backflow must contain an approved assembly of equal - Answers Protection An atmospheric pressure vacuum breaker shall not be subjected to water pressure for more than _______ hours - Answers 12 It is possible for a perfect vacuum at sea level to raise water in a pipe approximately ____ feet? - Answers 34 feet What is the most desirable place install a Backflow? - Answers In an accessible location above ground Which of the following conditions could result in water contamination through cross connection? - Answers Turning off service to a multi story building and allowing water supply to drain The degree of hazard is - Answers BASED UPON THE QUALITY OF A NON POTABLE WATER SOURCE The minimum type of containment protection for a non-health hazard, non chemical sprinkler is - Answers Double check Type of protection required for a closed loop heating system containing chemicals - Answers RPZ Water continuously leaking from test cock #2 during a test procedure of a pressure vacuum breaker assembly is probably caused by a leaking - Answers INLET SHUT-OFF VALVE #1 The required backflow for a fire sprinkler system containing chemicals is - Answers RPZ Required protection of a backflow for a closed loop system containing glycol is - Answers RPZ Primary consideration in determining what type of backflow to install is - Answers Degree of hazard What is the probable cause of a relief valve failing to open during a field test of a RPZ? - Answers Malfunction of the relief valve mechanism The required backflow protection for a chemically charged solar heating system with an expansion tank is? - Answers RPZ Type of protection associated with an air gap separation is - Answers Backsiphonage & back pressure ( all of the above) The application of a pressure vacuum breaker assembly is for - Answers Backsiphonage and isolation How many pounds of pressure per square inch are exerted at the base of a column of water that is two feet tall? - Answers 0.86 A pressure of 75 psi would be equivalent to ____ head of pressure? - Answers 173.2 feet A gauge installed at the bottom of an open tank, containing water 10 feet deep, would indicate what pressure reading? - Answers 4.3 psi What equipment is used to test a pressure vacuum breaker - Answers Differential pressure gauge Test cock number ____ may be opened to establish flow through a backflow? - Answers Four USC, AWWA and manufacturers recommend that backflow prevention assemblies be inspected, and that their proper operation is verified by a certified tester at least? - Answers Once every year A differential pressure gauge is used in the testing of - Answers Double checks and RPZs What info is required to be properly identify the Backflow assembly to be tested - Answers Type, manufacturer, location, size, model, serial number (all of the above) The original signed and tested date test report must be - Answers Submitted to the water purveyor The critical final step in testing a backflow prevention assembly is? - Answers Returning the assembly to normal operating condition The differential pressure relief valve on a RPZ must open before the differential pressure across the inlet drops below - Answers 2.0 The minimum hose diameter for a pressure gauge is ___ inches - Answers 1/4 What are the minimum scale increments allowed on a differential pressure gauge used for testing backflow assemblies? - Answers 0.2 psid What valve must be closed when testing a RPZ - Answers Number 2 shut off An occasional discharge from the relief valve of a RPZ indicates that - Answers The device is working properly If the check valve springs are interchanged on a double check valve, the assembly - Answers Will not be adversely affected by the interchange CONSTANT DISCHARGE FROM THE RELIEF VALVE OF A REDUCED PRESSURE PRINCIPLE ASSEMBLY USUALLY INDICATES: - Answers A leaking number 1 check valve The required number of test cocks on a small (3/4"-2") pressure vacuum breaker - Answers 2 test cocks When testing a differential pressure gauge, a pressure vacuum breaker assembly air inlet valve, water pressure is bled through - Answers The differential pressure gauge The purpose of testing Backflows annually - Answers To confirm the assembly is working properly and is not failing