Backflow Practice Exam All Possible Questions and Answers with complete solution

1) Backflow is the undesirable reversal of flow of water or other substances through a cross connection into the public water system or consumer's: - C. Public water system or consumer's portable water system 2) An approved airgap (AG) is a physical separation between the free-flowing end of a: - D. Potable water supply pipe line in the overflow rim of an open or non-pressurized receiving vessel 3) And indirect cross-connection is one that is subject to what type of backflow? - A. Only backsiphonage 4 )Cross-connections with between the portable water piping in any piping or containers containing substances not approved as potable water must be either eliminated or controlled by the installation of an: - D. Approved air gap or an approved backflow prevention assembly 5) While testing CV #2 of a DCVA if CV #2 leaks the BAT would observe that the water flow: - D. Stops from the site tube at TC#4 and no differential shows on the gauge 6) Service protection is a way to protect a public water system from contamination due to back flow from the customer's water system by the installing an approved backflow preventer at the: - A. Service connection which is considered to be at or near the water meter 7) A Washington state certified Backflow Assembly Tester is certified to: - D. Inspect, test and monitor backflow prevention assemblies 8) The RPBA is designed so that if the check valve leaks, the relief with valve may: - B. Open to discharge through the relief valve vent 9) An AG installed in lieu of an approved backflow prevention assembly must be inspected for compliance with the definition of an improved air gap by: - C. Either a CCS or a BAT10) After testing an approved backflow prevention assembly the BAT shall complete a test report that is acceptable to the: - C. Purveyor 11) The gauge on a differential pressure test kit indicates: - C. psid 12) Loading a check valve with springs or weights: - C. Reduces pressure down stream of the check valve 13) If there is flow across CV#1 and through an RPBA the relief valve will not discharge unless: - C. The relief valve is defective 14) Microbiological contaminates entering the portible water system are always a: - A. High-health standard 15) All approved backflow prevention assemblies must be tested with a: - D. Differential pressure test kit 16) An approved backflow prevention assembly is an: - C. RPBA, RPDA, DCVA, DCDA, PVBA, or SVBA of make, model, and size that is approved by the DOH