Mastering Dry-Barrel Hydrants
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Questions and Answers

What is the minimum diameter for fire hydrant supply mains?

  • 6 inches (correct)
  • 10 inches
  • 4 inches
  • 8 inches
  • Which piping arrangement is characterized by multiple water pathways?

  • Grid system (correct)
  • Loop system
  • Combination system
  • Dead-end main
  • What is the ideal distance between valves in high-value areas?

  • 100 feet
  • 500 feet (correct)
  • 250 feet
  • 1000 feet
  • Which type of valve visually shows the position of the valve: fully open, fully closed, or partially closed?

    <p>Indicating valve</p> Signup and view all the answers

    What are two common indicator valves?

    <p>Outside stem and yoke valve and post indicator valve</p> Signup and view all the answers

    What type of valve has a yoke on the outside of the structure with a threaded stem that opens or closes the gate inside the valve?

    <p>OS&amp;Y</p> Signup and view all the answers

    What type of valve has a rubber or a rubber-composition seat that is bonded to the valve body?

    <p>Butterfly valve</p> Signup and view all the answers

    According to the text, what is the purpose of the larger outlet on a dry-barrel hydrant?

    <p>To attach a soft suction line for feeding the pumping apparatus</p> Signup and view all the answers

    Why should hydrants be flushed every year?

    <p>To ensure they work and clean sedimentation from the pipes</p> Signup and view all the answers

    What is the minimum flow and residual pressure requirement for hydrants according to the ISO evaluation procedure?

    <p>250 gpm at 20 psi</p> Signup and view all the answers

    Which of the following is NOT a common example of a gravity system for water supply?

    <p>A system of cisterns that are considered a part of the distribution system</p> Signup and view all the answers

    What is the purpose of elevated storage tanks in a combination system?

    <p>To provide emergency storage</p> Signup and view all the answers

    Which type of properties are private water supply systems most commonly found on?

    <p>Commercial, industrial, or institutional properties</p> Signup and view all the answers

    What is the purpose of a circulating feed or looped line in a distribution system?

    <p>To reduce friction loss in the distribution system</p> Signup and view all the answers

    What are the primary purposes of private water supply systems?

    <p>Providing water for fire protection, sanitary purposes, manufacturing processes, or a combination of these uses</p> Signup and view all the answers

    What is the purpose of secondary feeders in a grid system?

    <p>To reinforce the grid within the various loops of the primary feeder system</p> Signup and view all the answers

    What is a potential issue with private water supply systems that provide nonpotable water for fire protection?

    <p>The water may be contaminated</p> Signup and view all the answers

    What are some advantages of having separate piping arrangements in a private water supply system?

    <p>Ability to isolate systems for inspection, testing, and maintenance</p> Signup and view all the answers

    Which component of a water supply system is responsible for removing contaminants from water?

    <p>Processing or treatment facility</p> Signup and view all the answers

    Which situation could drastically reduce the volume and pressure of water available for fire fighting operations?

    <p>All of the above</p> Signup and view all the answers

    What is the primary source of water in a direct pumping system?

    <p>Primary water source</p> Signup and view all the answers

    What is the main factor that determines the water pressure in a gravity system?

    <p>Primary water source elevation</p> Signup and view all the answers

    According to the International Fire Code®, 2012 edition, Section 507, if a portion of a facility or building is more than 400 feet (120m) from a hydrant, what is required by the fire code official?

    <p>On-site fire hydrants and mains</p> Signup and view all the answers

    For which occupancies is the distance requirement for hydrants 600 feet (180 m) according to the International Fire Code®, 2012 edition, Section 507?

    <p>R-3 and Group U</p> Signup and view all the answers

    If a building is equipped throughout with an automatic fire sprinkler system, what is the distance requirement for hydrants according to the International Fire Code®, 2012 edition, Section 507?

    <p>600 feet (180 m)</p> Signup and view all the answers

    Who has the authority to make decisions on the recommended spacing of hydrants according to the text?

    <p>The authority having jurisdiction (AHJ)</p> Signup and view all the answers

    What is the distance requirement for hydrants if a portion of a facility or building is less than 400 feet (120m) from a hydrant according to the International Fire Code®, 2012 edition, Section 507?

    <p>No specific requirement</p> Signup and view all the answers

    What is the distance requirement for hydrants if a portion of a facility or building is 500 feet (150m) from a hydrant according to the International Fire Code®, 2012 edition, Section 507?

    <p>400 feet (120m)</p> Signup and view all the answers

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