Cathodic Protection System Troubleshooting and Retrofitting
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Questions and Answers

What should you do if the test results of a cathodic protection system are incomplete or unsatisfactory?

  • Stop using the system immediately
  • Ignore the results and proceed with the system as is
  • Consult with a corrosion engineer
  • Troubleshoot and possibly add new equipment (correct)
  • What action might be needed if the anodes in a cathodic protection system do not provide enough voltage to protect the system?

  • Add more anodes (correct)
  • Increase the voltage elsewhere in the system
  • Replace the entire system
  • Remove all anodes
  • What does retrofitting refer to in the context of a cathodic protection system?

  • Adding new equipment to address issues found during testing (correct)
  • Removing all existing equipment
  • Consulting with a corrosion engineer
  • Switching to a different protection system
  • When should you consult with a corrosion engineer regarding cathodic protection systems?

    <p>For impressed current systems troubleshooting</p> Signup and view all the answers

    What does a reading of less than -0.85 volts indicate at an installation of a cathodic protection system?

    <p>A problem that requires troubleshooting</p> Signup and view all the answers

    What action should be taken if your voltmeter is not set to the DC volt scale when testing a cathodic protection system?

    <p>Set the voltmeter to the DC volt scale</p> Signup and view all the answers

    What should you do if the meter reading is still below -0.85 volts after ensuring the first checklist is complete?

    <p>Proceed to troubleshooting using a second checklist.</p> Signup and view all the answers

    What should you check if the coating on the tank is peeling in the dome?

    <p>The connection between the anode wire and the tank.</p> Signup and view all the answers

    When checking for continuity between the tank and the building, what does a reading below 20 ohms indicate?

    <p>There is continuity between the tank and the building.</p> Signup and view all the answers

    What action should be taken if retrofitting is needed due to worn-out anodes losing their charge over time?

    <p>Consult with your vendor for proper selection of new anodes.</p> Signup and view all the answers

    What should you use to prevent an anode wire from rubbing against a metal dome after drilling a hole to feed the wire through?

    <p>Rubber grommet or a short length of vinyl tubing.</p> Signup and view all the answers

    What should you do if voltage readings on the tank do not go up toward -0.85 volts after connecting a jumper wire between the multivalve and an anode wire?

    <p>Check for copper tubing between the tank and the building.</p> Signup and view all the answers

    When would retrofitting be necessary according to the text?

    <p>When an existing system has no anodes in place before.</p> Signup and view all the answers

    What action should be taken immediately after taking an anode out of its packaging and placing it on the ground near the tank?

    <p>Pour water on it and let it soak into the ground.</p> Signup and view all the answers

    What should you do if you need to add more anodes when testing shows that existing ones aren't providing enough voltage?

    <p>Consult with your vendor for proper selection when retrofitting.</p> Signup and view all the answers

    What is a crucial step to take before retrofitting an existing tank according to the text?

    <p>Call 811 to identify where underground utilities are.</p> Signup and view all the answers

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