Ch 6 pg 152-156
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Questions and Answers

What is the lowest operating pressure that a solid tip nozzle can operate with?

  • 40 PSI (correct)
  • 50 PSI
  • 60 PSI
  • 30 PSI
  • Why is a solid-tip nozzle often preferred for standpipe use?

  • It operates at a higher pressure.
  • It readily passes through rust and scale. (correct)
  • It has a more complex design.
  • It can produce a high fog stream.
  • What size nozzle is mandated for the first line operated from a standpipe in the FDNY?

  • 1 3/4-inch with a solid tip
  • 1 1/2-inch with a fog tip
  • 2 1/2-inch with a solid tip (correct)
  • 3-inch with a dual-pressure tip
  • What is the primary advantage of using a fog tip in standpipe operations?

    <p>It can vent a fire area after it has been extinguished.</p> Signup and view all the answers

    What design feature is required for all nozzles used in standpipe operations?

    <p>They should have a break-apart design.</p> Signup and view all the answers

    What is the required outlet valve pressure for four lengths of 2 1/2-inch hose flowing 250 gpm?

    <p>75 psi</p> Signup and view all the answers

    What was the historical maximum pressure at the top-floor outlet for fire department equipment?

    <p>65 psi</p> Signup and view all the answers

    Which hose sizes are recommended if a department requires a higher water volume?

    <p>2 1/2-inch hose</p> Signup and view all the answers

    What was the minimum pressure at 2 1/2-inch outlets after the 2013 edition of NFPA 14 was published?

    <p>100 psi</p> Signup and view all the answers

    What flow rate can a 1 1/8-inch solid-tip nozzle produce at 65 psi through 100 feet of 2 1/2-inch hose?

    <p>250 gallons per minute</p> Signup and view all the answers

    What is not listed as a tool to carry in a standpipe kit?

    <p>Flat head screw driver</p> Signup and view all the answers

    Why might adaptors be necessary in the kit?

    <p>Some standpipes have non-standard fittings</p> Signup and view all the answers

    Which tool is explicitly mentioned as necessary alongside the spanner wrench?

    <p>A pipe wrench</p> Signup and view all the answers

    What might happen to the operating wheel of the outlet valve?

    <p>It may be removed by vandals</p> Signup and view all the answers

    What size of pipe wrench is mentioned as a requirement?

    <p>14 or 18 inches</p> Signup and view all the answers

    What is the primary function of wooden door chocks during fire safety operations?

    <p>To prevent lines from binding under doors</p> Signup and view all the answers

    Why are door-latch search markers important in search operations?

    <p>They prevent a door from latching unexpectedly</p> Signup and view all the answers

    Which piece of equipment is NOT listed as necessary on the fire floor?

    <p>Fire blanket</p> Signup and view all the answers

    What is the primary reason for using portable radios during fire operations?

    <p>For team communication and relaying instructions</p> Signup and view all the answers

    What is an appropriate procedure if the fire is above the seventh floor?

    <p>Take the elevator</p> Signup and view all the answers

    What does OSHA state as the minimum number of FFs allowed?

    <p>4</p> Signup and view all the answers

    What is a consequence of using two 2 1/2-in. lines instead of a single 5-in. line when supplying water to a firefighting system?

    <p>It reduces the total volume of water delivered.</p> Signup and view all the answers

    What might necessitate bypassing the siamese connection during firefighting operations?

    <p>Malfunctioning control valves.</p> Signup and view all the answers

    What is a key consideration when assessing the effectiveness of the siamese supply line?

    <p>Indicators such as someone calling for more water</p> Signup and view all the answers

    Once enough personnel are available to ensure the rapid advance of the first line, what should additional personnel be committed to?

    <p>Searching the fire area and stretching a second line if needed</p> Signup and view all the answers

    What simplifies the connection to the first or second floor outlets?

    <p>2 1/2 in clappered Siamese connection and a 2 1/2 in double female</p> Signup and view all the answers

    What indicates that a pump is churning water with little or no flow?

    <p>No change in intake pressure</p> Signup and view all the answers

    What is the recommended starting discharge pressure for standpipe systems on the fifth floor?

    <p>120 psi</p> Signup and view all the answers

    Why might smaller diameter hoses require a higher starting pressure than a 2 1/2-inch line?

    <p>Higher friction losses occur</p> Signup and view all the answers

    What is the discharge pressure required for a fog nozzle on the eighth floor?

    <p>185psi</p> Signup and view all the answers

    What additional pressure is needed when using a fog nozzle compared to a solid-tip nozzle for the same floor level?

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

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