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