202-11 Relay Pumping
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Questions and Answers

According to the formula, how many pumpers are needed if the distance is 1800 feet?

  • 4
  • 3 (correct)
  • 2
  • 5

    • What is the initial pressure placed on the discharge line to the next pumper in the relay?

  • 100 PSI
  • 50 PSI (correct)
  • 75 PSI
  • 25 PSI

    • What is the minimum compound gauge pressure that the pump operator of the source pumper should maintain?

  • 5 PSI (correct)
  • 20 PSI
  • 10 PSI
  • 15 PSI

    • What is the minimum intake pressure on other intermediate relay pumpers?

    <p>20 PSI</p> Signup and view all the answers

    According to the text, what is the maximum stretch between pumpers in a relay for a 5" line company?

    <p>800' to 900'</p> Signup and view all the answers

    What is the approximate capacity of the pumps in the relay for a 5" line company?

    <p>1500gpm</p> Signup and view all the answers

    What is the maximum discharge pressure for 5" line companies in a relay?

    <p>175 PSI</p> Signup and view all the answers

    What should fireground commanders and company officers be aware of when deciding which master streams can be utilized?

    <p>The limitations of the particular relay involved</p> Signup and view all the answers

    Which type of pumper is allowed to be used as the fireground pumper in a relay operation?

    <p>Specialized apparatus, such as a Squrt or Foam pumper</p> Signup and view all the answers

    What is the initial pressure placed on the discharge lines at the beginning of a relay operation?

    <p>50 PSI</p> Signup and view all the answers

    What is the maximum discharge pressure of a 5" line relay?

    <p>175 PSI</p> Signup and view all the answers

    What is the minimum compound gauge reading that the source pumper should maintain?

    <p>5 PSI</p> Signup and view all the answers

    Which type of hydrant is recommended to be connected to the source pumper in a relay operation?

    <p>Green top hydrant</p> Signup and view all the answers

    What is the recommended stretch between relay pumpers in a relay operation?

    <p>500 to 900 feet</p> Signup and view all the answers

    What is the purpose of the dump/discharge line in a relay operation?

    <p>To maintain the flow of water in case of emergency shutdown</p> Signup and view all the answers

    What is the guideline for setting up a relay in terms of city blocks coverage?

    <p>One relay pumper can cover 1 to 1 ½ city blocks</p> Signup and view all the answers

    Which one of the following best defines relay pumping?

    <p>Using multiple pumpers to move water over a long distance by operating them in series</p> Signup and view all the answers

    What is the purpose of a relay procedure in firefighting?

    <p>To minimize confusion and ensure an adequate water supply</p> Signup and view all the answers

    When are relaying operations typically required?

    <p>When the distance exceeds 1000 feet</p> Signup and view all the answers

    In which situations might a relay operation be necessary in the city of Philadelphia?

    <p>An extra-alarm fire where the residual water supply is exhausted</p> Signup and view all the answers

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