Engine Ops | Nozzle Options
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Questions and Answers

What is the recommended method for cleaning the nozzle?

  • Soaking in warm water and mild degreaser (correct)
  • Scrubbing with a wire brush
  • Using a chemical solvent for deep cleaning
  • Wiping with a dry cloth

    • What should be checked to ensure there is no obvious damage to the nozzle?

  • The bumper and teeth (correct)
  • The hose connection
  • The handle grip
  • The nozzle body color

    • What lubricant should be used for the nozzle per the operating manual?

  • Grease-based lubricant
  • Vegetable oil
  • WD-40
  • Dow-Corning #7 lubricant (correct)

    • What should be done if basic nozzle maintenance does not resolve the issue of stiff nozzles and hard-to-move swivels?

    <p>Refer to a senior engineer for guidance</p> Signup and view all the answers

    What is NOT normal station level maintenance for the nozzle?

    <p>Removing and cleaning the ball bearings</p> Signup and view all the answers

    What can attract dirt and grit which can interfere with the moving nozzle parts?

    <p>Excessive lubricant</p> Signup and view all the answers

    How can damaged teeth on the nozzle be replaced?

    <p>By removing two allen screws and replacing the damaged tooth ring with a new one</p> Signup and view all the answers

    What should be done to loosen and remove any dirt buildup after moving the nozzle in warm water/degreaser mixture?

    <p>Open and close the bale</p> Signup and view all the answers

    What is used to check that there are no missing or loose teeth on the nozzle?

    <p>Visual inspection</p> Signup and view all the answers

    What can cause nozzles not to swivel over time?

    <p>Dirt and grime gunking up bearings</p> Signup and view all the answers

    Which type of nozzles are most engines 2019 and newer equipped with?

    <p>Elkhart Chief XD series nozzles</p> Signup and view all the answers

    What is the nozzle pressure for smooth bore hand line nozzles designed to be flowed at?

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

    What is the force exerted from the discharge of water out of a nozzle back at the firefighter called?

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

    What is the flow target for initial interior residential attack lines?

    <p>150 GPM minimum</p> Signup and view all the answers

    What is the construction of most Elkhart Chief XD nozzles?

    <p>Standard full round ball shutoff construction</p> Signup and view all the answers

    What components do (most) Elkhart Chief nozzles come with integrated?

    <p>Smooth bore tips</p> Signup and view all the answers

    What series of nozzles are carried by CFD?

    <p>Elkhart Chief and Chief XD series nozzles</p> Signup and view all the answers

    What is the nozzle pressure for combination and automatic nozzles?

    <p>$150 PSI at the nozzle$</p> Signup and view all the answers

    What is defined as the quantity of water measured in gallons per minute (GPM)?

    <p>$Flow$</p> Signup and view all the answers

    What does Elkhart Chief XD NOZZLE not have that makes it different from ELKHART CHIEF NOZZLE?

    <p>Integrated smooth bore tips</p> Signup and view all the answers

    What does Elkhart Chief XD NOZZLE not have that makes it different from ELKHART CHIEF NOZZLE?

    <p>Integrated smooth bore tips</p> Signup and view all the answers

    What is the Freeman Principle related to?

    <p>Selecting a nozzle and hose to maintain the optimal exit velocity of the stream</p> Signup and view all the answers

    What is the primary purpose of the Elkhart Brass ST-185Indy Stack- 1 1/8 nozzle?

    <p>To allow for easy interchange of tip sizes to achieve the desired GPM</p> Signup and view all the answers

    What is the consequence of overpumping a trash line at higher pressures?

    <p>Limited benefits and extreme workloads on operating crews</p> Signup and view all the answers

    What is the main difference between Full Round Ball shutoff and Double Cut Ball shutoff?

    <p>Double Cut Ball shutoff allows the flow of water to assist with opening/closing the nozzle bale, while Full Round Ball creates a smoother discharge orifice</p> Signup and view all the answers

    What can be identified by the beveled machined edge on the inner face of the nozzle discharge orifice?

    <p>An integrated tip</p> Signup and view all the answers

    What does Select-O-Matic Automatic Nozzle's ratio between nozzle pressure and flow indicate?

    <p>It indicates an exponential growth regarding nozzle reaction and GPM as pressure is increased</p> Signup and view all the answers

    What is the primary purpose of CFD smooth bore nozzles operated at 50 PSI nozzle pressure?

    <p>To maintain reach and penetration of the attack stream</p> Signup and view all the answers

    What are the repercussions of overpumping or underpumping a hand line?

    <p>Limited benefits and extreme workloads on operating crews in both directions</p> Signup and view all the answers

    What determines the optimal exit velocity of the stream for fire attack?

    <p>Selecting a nozzle and hose to maintain reach and penetration</p> Signup and view all the answers

    What does Smooth Bore principle state about nozzle orifice size relative to hose diameter?

    <p>The orifice of the nozzle should ideally not be greater than half the diameter of the hose</p> Signup and view all the answers

    What does Freeman Principle help in achieving during fire attack?

    <p>Ensures adequate reach and penetration needed for fire attack is obtained</p> Signup and view all the answers

    What is the primary purpose of Combination nozzles in terms of operation?

    <p>To maintain reach and penetration of the attack stream</p> Signup and view all the answers

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