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Backflow Troubleshooting Exam with Questions and Answers 2024 Edition, Exams of Water Resources Planning and Management

Texas State Technical College-West TexasWater Resources Planning and Management

Backflow Troubleshooting Exam with Questions and Answers 2024 Edition

Typology: Exams

2024/2025

Available from 11/24/2024

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Martin-Ray-1 🇺🇸

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Backflow Troubleshooting Exam with
Questions and Answers 2024 Edition
1. When testing an RP, upon closing the number 2 shut off valve and
the high and low side bleed valves, the gauge reading drops and
differential pressure relief valve begins to discharge. How do you
proceed? - Correct Ans: ✔✔Record the number 1 check valve is
leaking and end the test.
2. While field testing the number 1 check valve of a DC, water
continues to flow from the site tube. What is most likely to be the
cause of this situation? - Correct Ans: ✔✔Shut off valve #1 one is
leaking.
3. While field testing the differential pressure relief valve of the RP,
what gauge reading indicates a failure? - Correct Ans: ✔✔Less
than 2.0 PSID
4. While field testing the air inlet valve of a pressure vacuum
breaker, the high side bleed valve is opened 1/4 turn and the
gauge reading will not drop. How do you proceed? - Correct Ans:
✔✔Close the high side bleed valve, then open the number 1 test
cock.
5. While field testing the second check valve of an RP, the high side
pressure is applied through number 4 test cock and the gauge
pf3
pf4
pf5

Partial preview of the text

Download Backflow Troubleshooting Exam with Questions and Answers 2024 Edition and more Exams Water Resources Planning and Management in PDF only on Docsity!

Backflow Troubleshooting Exam with

Questions and Answers 2024 Edition

  1. When testing an RP, upon closing the number 2 shut off valve and the high and low side bleed valves, the gauge reading drops and differential pressure relief valve begins to discharge. How do you proceed? - Correct Ans: ✔✔Record the number 1 check valve is leaking and end the test.
  2. While field testing the number 1 check valve of a DC, water continues to flow from the site tube. What is most likely to be the cause of this situation? - Correct Ans: ✔✔Shut off valve #1 one is leaking.
  3. While field testing the differential pressure relief valve of the RP, what gauge reading indicates a failure? - Correct Ans: ✔✔Less than 2.0 PSID
  4. While field testing the air inlet valve of a pressure vacuum breaker, the high side bleed valve is opened 1/4 turn and the gauge reading will not drop. How do you proceed? - Correct Ans: ✔✔Close the high side bleed valve, then open the number 1 test cock.
  5. While field testing the second check valve of an RP, the high side pressure is applied through number 4 test cock and the gauge

reading drops to the relief valve opening point. How do you proceed? - Correct Ans: ✔✔Bleed water through the low side of the gauge to a reading above the apparent.

  1. While field testing the first check valve of a double check valve assembly, the water in the site tubes recedes. What does this imply? - Correct Ans: ✔✔Check valve number 2 and shut off valve number 2 leak.
  2. While field testing the second check valve of a double check valve assembly, water continues to flow from the sight tube. You open the bleed off valve and a small amount of water comes out of the bleed off valve and then stops. The gauge reading goes to zero and water continues to flow from the sight tube. What does this imply? - Correct Ans: ✔✔Shut off valve number two leaks with back pressure
  3. While field testing the air inlet valve of a pressure vacuum breaker, the high side bleed valve is open 1/4 turn in the gauge reading will not drop. What does this imply? - Correct Ans: ✔✔Shut off the valve number 1 is leaking.
  4. While field testing a double check valve assembly, what gauge reading would indicate a check valve failure? - Correct Ans: ✔✔Less than 1.0 PSID
  1. While field testing the second check valve of an RP, the high side pressure is applied through number 4 test cock, and the gauge reading drops to the relief valve opening point. What does this imply? - Correct Ans: ✔✔Check valve number 2 leaks. (to confirm, flush again).
  2. While field testing the second check valve of a double check valve assembly, the water in the site tube recedes. How do you proceed? - Correct Ans: ✔✔Move the gauge to the centerline of the assembly and record the gauge reading.
  3. While field testing the second check valve of a double check valve assembly the water in the sight to be seen. What does this imply? - Correct Ans: ✔✔Shut off valve number 2 leaks.
  4. While field testing the differential pressure relief valve opening point of an RP, the high side control needle valve is open, and the low side control needle valve is open 1/4 turn. However, the reading on the gauge will not lower to relief valve opening point. How do you proceed? - Correct Ans: ✔✔Check that the shut off valve number 2 is closed and then run a bypass hose from test cock 1 to test cock 4.
  5. While field testing the check valve of a pressure vacuum breaker, water continues to flow from the # 2 test cock. How do

you proceed? - Correct Ans: ✔✔Open the bleed off valve until the flow slows to a slight drip.

  1. Well field testing the first check valve of a double check valve assembly, water continues to flow from the site tube. How do you proceed? - Correct Ans: ✔✔Observe reading on gauge (first step). Open high side of bleed valve (second step).
  2. While field testing the check valve of a spill resistant pressure vacuum breaker, water continues to flow from the vent valve. What does this imply? - Correct Ans: ✔✔Number 1 shut off valve is leaking.
  3. While field testing the differential pressure relief valve opening point of RP, it is found that the shut - off valve # 2 is leaking. How should the temporary bypass hose be connected to compensate for the leak? - Correct Ans: ✔✔Test cock # 1 to test cock # 4
  4. While field testing the second check valve of a reduced pressure principle assembly, high side pressure is applied through test cock # 4 and the gage reading begins to increase. How do you proceed? - Correct Ans: ✔✔Close the # 2 test cock.
  5. While field testing the differential pressure relief valve opening point of an RP, the high side control needle valve is open,