BACKFLOW PREVENTION AND CROSS CONNECTION CONTROL
EXAM ACTUAL QUESTIONS AND VERIFIED ANSWERS UPDATED
2024/2025
Relief valve discharges continuously. Problem May be caused by what 5 faults?
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?
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?
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?
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?
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?
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?
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?
1. Dirty or damaged CV 2 disc
2. Dirty or damaged CV 2 seat
EXAM ACTUAL QUESTIONS AND VERIFIED ANSWERS UPDATED
2024/2025
Relief valve discharges continuously. Problem May be caused by what 5 faults?
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?
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?
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?
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?
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?
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?
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?
1. Dirty or damaged CV 2 disc
2. Dirty or damaged CV 2 seat
