Backflow Prevention And Cross Connection Control Study Guide Questions And Correct Answers

During RP Test 1 or 3, Check Valve No. 1 check reading too low (less than 5.0). What does this indicate? {Ans: 1. Dirty or damaged disc 2. Dirty or damaged seat 3. Guide members hanging up 4. Damaged spring}During RP Test 2, Check Valve No. 2 is Leaking. What does this indicate? {Ans: 1. Dirty or damaged CV 2 disc 2. Dirty or damaged CV 2 seat 3. CV2 guide members hanging up NOTE: Lubricants should only be used to assist with the reassembly of components, and must be non-toxic.}During RP Test 1, Relief valve would not open, differential drops to zero. What does this indicate? {Ans: 1. Relief valve stuck closed due to corrosion or scale (RVSC). 2. Relief valve sensing line(s) plugged.}When testing the RP backflow device, and while observing the gauge, and HSNV is open one full turn and LSNV is open 1/4 turn, and gage reading does not drop to RV opening point (RP Test 1, Step 11), what action(s) do you take to troubleshoot the equipment? {Ans: 1. The RP # 2 SOV leaking (direction of Flow) 2. Close HSNV & LSNV and reseal the #2SOV 3. Reopen LSNV &