Backflow Prevention and Cross Connection Control Exam
|100% Verified| Questions & Answers Latest Update.
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
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, 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
3. CV2 guide members hanging up
NOTE: Lubricants should only be used to assist with the reassembly of components, and
must be non-toxic.
This study source was downloaded by 100000899507370 from CourseHero.com on 06-08-2025 07:06:21 GMT -05:00
https://www.coursehero.com/file/249971983/Backflow-Prevention-and-Cross-Connection-Control-Exam-100-Verified-Questions-Answers-Latest-Updat/
|100% Verified| Questions & Answers Latest Update.
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
This study source was downloaded by 100000899507370 from CourseHero.com on 06-08-2025 07:06:21 GMT -05:00
https://www.coursehero.com/file/249971983/Backflow-Prevention-and-Cross-Connection-Control-Exam-100-Verified-Questions-Answers-Latest-Updat/
, 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
3. CV2 guide members hanging up
NOTE: Lubricants should only be used to assist with the reassembly of components, and
must be non-toxic.
This study source was downloaded by 100000899507370 from CourseHero.com on 06-08-2025 07:06:21 GMT -05:00
https://www.coursehero.com/file/249971983/Backflow-Prevention-and-Cross-Connection-Control-Exam-100-Verified-Questions-Answers-Latest-Updat/
