backflow exam questions and answers all are correct 2024 graded A+

Double Check Valve Assembly - A testable mechanical device consisting of two independently operating, spring-loaded check valves, four test cocks, and two full port shut off valves the purpose of an ASSE 1018 trap primer is to - maintain a trap seal a laboratory faucet vacuum breaker must contain - two independently acting check valves ASSE 1060 - outdoor enclosures standard, freeze protective enclosures must provide protection to a remedies of -30 f device - a backflow prevents generally consisting of a single valve body not capable of being field tested using a differential gauge to stop a siphonic actin within a potable water system, we must - admit air into the system waterborne diseases - typhoid, cholera and giardiasis a double check detector assembly installed on a antifreeze loop area requires - replacement removal of the relief valve spring on a reduced pressure principle assembly will cause the assembly to - become a approved double check valve assembly when testing the first check valve in the direction of flow on a reduced pressure assembly using a sight tube the tube must be a minimum of - 138.75 continuing discharge for a reduced pressure principle assembly during a no flow condition may be caused by - a debris fouling the number one check valvenegligence - not meeting ones responsibility and causing harm residual pressure - the pressure available at a fixture or water outlet after allowances are made for pressure natural or propane fires domestic water heatersbare protected from excess pressure by the installation of a.. - thermal expansion tank installation of backflow assemblies results in - decrease in system water pressure according to the manufacturers instructions valve levers on a t&p relief valve should be operated at least - every 12 months the installation of backflow asswmblies result in - velocity spike