Backflow Prevention and Cross
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Connection Control exam with verified
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answers
Relief |valve |discharges |continuously. |Problem |May |be |caused |by |what |5 |faults? |- |CORRECT |
ANSWER✔✔-1. |Faulty |No. |1 |check |valve |(F1CV)
2. |Faulty |No. |2 |check |valve |with |backpressure |(F2CVwB) |
3. |Faulty |relief |valve |(FRV)
4. |Relief |valve |plugged |sensing ||ine(s) |(RVPSL)
5. |Relief |Valve |leaking |diaphragm |(RVLD)
Relief |valve |discharges |intermittently. |Problem |May |be |caused |by |what |4 |faults? |- |CORRECT |
ANSWER✔✔-1. |Properly |working |assembly |with |large |pressure |fluctuations
2. |No.1 |check |valve |reading |is |close |to |RV |opening |point, |with |small |line |pressure |fluctuation.
3. |Water |hammer
4. |No. |1 |check |valve |leak |with |intermittent |flow |through |assembly.
During |RP |Test |1, |Relief |Valve |discharges |after |No. |2 |shutoff |valve |is |closed. |What |does |this |
indicate? |- |CORRECT |ANSWER✔✔-1. |Normally |indicates |faulty |No. |1 |check |valve
• |Dirty |or |damaged |disc
• |Dirty |or |damaged |seat: |or, |
2. |Leak |through |relief |valve |diaphragm
During |RP |Test |1, |Relief |valve |would |not |open; |differential |on |the |field |test |kit |would |not |drop.
|What |does |this |indicate? |- |CORRECT |ANSWER✔✔-1. |Leaky |No. |2 |shutoff |valve |with |flow |
through |the |assembly |(L2SVwF)
, During |RP |Test |1, |Relief |valve |would |not |open, |differential |drops |to |zero. |What |does |this |
indicate? |- |CORRECT |ANSWER✔✔-1. |Relief |valve |stuck |closed |due |to |corrosion |or |scale |(RVSC).
2. |Relief |valve |sensing |line(s) |plugged.
During |RP |Test |1, |Relief |valve |opens |too |high |(with |sufficiently |high |No. |1 |check |reading). |
What |does |this |indicate? |- |CORRECT |ANSWER✔✔-1. |Faulty |relief |valve
• |Dirty |or |damaged |disc
• |Dirty |or |damaged |seat
During |RP |Test |1 |or |3, |Check |Valve |No. |1 |check |reading |too |low |(less |than |5.0). |What |does |this
|indicate? |- |CORRECT |ANSWER✔✔-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? |- |CORRECT |
ANSWER✔✔-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 |DC |Test |for |either |check |valve, |the |Check |valve |is |reading |below |1.0 |psid. |What |does |
this |indicate? |- |CORRECT |ANSWER✔✔-1. |Dirty |or |damaged |check |disc
2. |Dirty |or |damaged |check |seat
3. |Damaged |spring
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Connection Control exam with verified
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answers
Relief |valve |discharges |continuously. |Problem |May |be |caused |by |what |5 |faults? |- |CORRECT |
ANSWER✔✔-1. |Faulty |No. |1 |check |valve |(F1CV)
2. |Faulty |No. |2 |check |valve |with |backpressure |(F2CVwB) |
3. |Faulty |relief |valve |(FRV)
4. |Relief |valve |plugged |sensing ||ine(s) |(RVPSL)
5. |Relief |Valve |leaking |diaphragm |(RVLD)
Relief |valve |discharges |intermittently. |Problem |May |be |caused |by |what |4 |faults? |- |CORRECT |
ANSWER✔✔-1. |Properly |working |assembly |with |large |pressure |fluctuations
2. |No.1 |check |valve |reading |is |close |to |RV |opening |point, |with |small |line |pressure |fluctuation.
3. |Water |hammer
4. |No. |1 |check |valve |leak |with |intermittent |flow |through |assembly.
During |RP |Test |1, |Relief |Valve |discharges |after |No. |2 |shutoff |valve |is |closed. |What |does |this |
indicate? |- |CORRECT |ANSWER✔✔-1. |Normally |indicates |faulty |No. |1 |check |valve
• |Dirty |or |damaged |disc
• |Dirty |or |damaged |seat: |or, |
2. |Leak |through |relief |valve |diaphragm
During |RP |Test |1, |Relief |valve |would |not |open; |differential |on |the |field |test |kit |would |not |drop.
|What |does |this |indicate? |- |CORRECT |ANSWER✔✔-1. |Leaky |No. |2 |shutoff |valve |with |flow |
through |the |assembly |(L2SVwF)
, During |RP |Test |1, |Relief |valve |would |not |open, |differential |drops |to |zero. |What |does |this |
indicate? |- |CORRECT |ANSWER✔✔-1. |Relief |valve |stuck |closed |due |to |corrosion |or |scale |(RVSC).
2. |Relief |valve |sensing |line(s) |plugged.
During |RP |Test |1, |Relief |valve |opens |too |high |(with |sufficiently |high |No. |1 |check |reading). |
What |does |this |indicate? |- |CORRECT |ANSWER✔✔-1. |Faulty |relief |valve
• |Dirty |or |damaged |disc
• |Dirty |or |damaged |seat
During |RP |Test |1 |or |3, |Check |Valve |No. |1 |check |reading |too |low |(less |than |5.0). |What |does |this
|indicate? |- |CORRECT |ANSWER✔✔-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? |- |CORRECT |
ANSWER✔✔-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 |DC |Test |for |either |check |valve, |the |Check |valve |is |reading |below |1.0 |psid. |What |does |
this |indicate? |- |CORRECT |ANSWER✔✔-1. |Dirty |or |damaged |check |disc
2. |Dirty |or |damaged |check |seat
3. |Damaged |spring
