Strategy and Tactics Chapter 7
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Questions and Answers

What is the primary purpose of wet pipe sprinkler systems in a residence?

  • To support offensive strategies
  • To lay backup lines for extinguishment
  • To minimize fire damage
  • To allow additional escape time (correct)

    • What should firefighters be prepared to resolve as causes of sprinkler failure?

  • Improper design of the system
  • Closed valve in the water supply (correct)
  • Inadequate maintenance of the building structure
  • Occupancy changes rendering the system unsuitable

    • What is the primary purpose of a dry pipe system?

  • To provide a more reliable fire protection system
  • To allow for faster system activation
  • To prevent freezing in areas subject to low temperatures (correct)
  • To reduce the risk of antifreeze contamination

    • What is a characteristic of a preaction sprinkler system?

    <p>It has a sensing device that opens a valve flooding the piping with water</p> Signup and view all the answers

    What is a requirement for dry pipe and preaction systems with a capacity exceeding 500 gallons?

    <p>They must be equipped with an accelerator or exhauster</p> Signup and view all the answers

    What is the primary purpose of deluge systems?

    <p>To protect areas with high-challenge fire potential</p> Signup and view all the answers

    What is the recommended action when a system is out of service according to NFPA 25?

    <p>Place a tag at required locations</p> Signup and view all the answers

    What is the most common operational error at properties protected by automatic sprinkler systems?

    <p>Shutting down the system prematurely</p> Signup and view all the answers

    What is a method of checking for water flow if the sprinkler system is not equipped with a water gong?

    <p>Putting an ear against the riser and listening for water flow</p> Signup and view all the answers

    What is considered poor practice when determining whether the fire pumps are running?

    <p>Relying on remote annunciator panels</p> Signup and view all the answers

    What size of lines should be connected to the Fire Department Connection (FDC) when a pumper is connected to an adequate offsite water supply?

    <p>Two 2.5&quot; inch or two 3&quot; lines</p> Signup and view all the answers

    What pressure do most Fire Departments provide to the Fire Department Connection (FDC)?

    <p>150 psi</p> Signup and view all the answers

    What is a common main control valve?

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

    What are the options for the assigned FDC pumper when a hydrant is nearby?

    <p>Use soft suction to connect to the hydrant and hand lay lines to the FDC</p> Signup and view all the answers

    What is a potential problem with using Large Diameter Hose (LDH) to supply a sprinkler system or standpipe?

    <p>The weight of hose and water bearing on the intake is significant</p> Signup and view all the answers

    What is a potential problem with LDH FDC connections?

    <p>Unisex connection can accidentally disconnect</p> Signup and view all the answers

    What is an important consideration for facilities protected by a deluge system?

    <p>Manual operation of the deluge valve should be done provided it is safe to do so in a safe location</p> Signup and view all the answers

    What action should property owners take after their sprinkler system has been used at a fire?

    <p>Contact a licensed sprinkler contractor to inspect the system after use at a fire</p> Signup and view all the answers

    What type of standpipe system is filled with water and provides water when a discharge is opened?

    <p>Automatic wet</p> Signup and view all the answers

    Which standpipe system relies entirely on water provided by the Fire Department Connection (FDC)?

    <p>Manual dry</p> Signup and view all the answers

    Which standpipe system admits water into the piping upon activation of a remote-control device located at a hose connection?

    <p>Semiautomatic dry</p> Signup and view all the answers

    What type of standpipe uses 2.5" hose connections?

    <p>Class I</p> Signup and view all the answers

    What type of standpipe uses 1.5" hose connections?

    <p>Class II</p> Signup and view all the answers

    What type of standpipe uses 1.5" and 2.5" hose connections?

    <p>Class III</p> Signup and view all the answers

    What does 150 ft of 1.75" line with 15/16 or 7/8 tip or a low constant flow nozzle provide?

    <p>A flow capable of containing most fires in a compartment not requiring a flow of more than 100 gpm</p> Signup and view all the answers

    What does the law of hydraulics state about backpressure for elevation?

    <p>0.434 psi for every 1 ft of elevation</p> Signup and view all the answers

    What is one of the primary problems of a manual dry system?

    <p>Problems with the standpipe won't be known until the FD attempts to use the system</p> Signup and view all the answers

    What is the one of the primary benefits of using carbon dioxide extinguishing agents?

    <p>Preventing water damage</p> Signup and view all the answers

    What is the purpose of a foam house in refineries and petroleum storage depots?

    <p>Contain additional quantities of foam agent</p> Signup and view all the answers

    How does carbon dioxide extinguish fires?

    <p>Depleting the oxygen supply</p> Signup and view all the answers

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