Engine Ops | Pump Ops
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Questions and Answers

Which mode on the Pump Boss allows the operator to control the pump's output pressure?

  • Pressure Mode (correct)
  • No Water Mode
  • RPM Mode
  • Low Water Mode

    • What is the main advantage of using a series water supply?

  • Greater pump longevity
  • Higher pump efficiency
  • Increased pump reliability
  • Ability to maintain continuous water flow (correct)

    • How are discharge relief valves different from Pump Boss?

  • Pump Boss prevents water hammer
  • Pump Boss regulates water flow rate
  • Discharge relief valves control pump output pressure
  • Discharge relief valves protect against excessive pressure (correct)

    • What are the three main priorities for drivers/pump operators?

    <p>Ensuring water supply, setting and maintaining discharge relief valves, controlling pump output pressure</p> Signup and view all the answers

    What is the purpose of intake relief valves?

    <p>Protect against excessive suction pressure</p> Signup and view all the answers

    What does the debate about single-stage vs. two-stage pumps primarily focus on?

    <p>Pump efficiency</p> Signup and view all the answers

    What is the number one goal of any pump operation?

    <p>To establish a constant water supply to interior attack crews</p> Signup and view all the answers

    Why is close monitoring of residual intake pressure critical for the safety of crews operating in an IDLH atmosphere?

    <p>To maintain at least a 10 PSI residual pressure</p> Signup and view all the answers

    What is the purpose of setting up a series water supply according to the text?

    <p>To offer many advantages over a simple water supply</p> Signup and view all the answers

    What is the role of a known amount of water engine connecting to the water main and beginning operations according to the text?

    <p>Affecting the available water supply</p> Signup and view all the answers

    Where was the formula for calculating remaining supply based on the percentage drop obtained from?

    <p>Fire Service Hydraulics and Pump Operations by Paul Spurgeon</p> Signup and view all the answers

    What is viewed as a safety net by many pump operators according to the text?

    <p>A good water supply</p> Signup and view all the answers

    What is the initial pressure considered when water is brought into the pump from one of the intakes?

    <p>Static Pressure</p> Signup and view all the answers

    What should engine operators note to provide an accurate estimate of available water if the incident escalates and requires more water?

    <p>Initial intake pressure</p> Signup and view all the answers

    How is the percentage drop calculated when estimating the remaining flow in the system?

    <p>Divide the PSI drop by the initial intake pressure</p> Signup and view all the answers

    In a scenario with a 0-10% drop, how is the remaining supply estimated?

    <p>Three times the amount that caused the drop</p> Signup and view all the answers

    For an 11-15% drop, how is the remaining supply estimated?

    <p>Twice the amount that caused the drop</p> Signup and view all the answers

    What does a 16-20% drop from Static Pressure indicate?

    <p>The same amount that caused the drop remaining in the system</p> Signup and view all the answers

    What does a percentage drop greater than 20% indicate about the remaining water supply?

    <p>Half of the amount that caused the drop remaining in the system</p> Signup and view all the answers

    What should crews do if faced with drops greater than 20%?

    <p>Carefully monitor their intake pressure when opening more discharges</p> Signup and view all the answers

    What allows an operator to make an accurate determination of the remaining supply?

    <p>$GPM$ of the discharge</p> Signup and view all the answers

    When is a hydrant supply generally established?

    <p>Before flowing water from attack line/s</p> Signup and view all the answers

    What is recommended for engine operators to note for extended lays?

    <p>Initial static pressure whenever possible</p> Signup and view all the answers

    What should crews do to avoid a sharp drop in Residual Pressure leading to a loss of pressure on interior handlines?

    <p>Carefully monitor their intake pressure when opening more discharges</p> Signup and view all the answers

    What is the primary reason for placing engines in series?

    <p>To maximize the supply and create a redundancy/fail safe in the system</p> Signup and view all the answers

    Why should the supply engine be placed as close as possible to the hydrant?

    <p>To reduce friction loss from the positive source (hydrant)</p> Signup and view all the answers

    Why is gating down interior handlines less desirable than gating down exterior lines?

    <p>Interior handlines are more susceptible to sudden loss in nozzle pressure due to a sudden reduction of residual pressure</p> Signup and view all the answers

    When should interior lines be gated down according to the text?

    <p>When other avenues of reducing pressure have already been tried</p> Signup and view all the answers

    What is the goal of gating down exterior streams?

    <p>To divert water to other streams and protect exposures</p> Signup and view all the answers

    Why is gating down interior lines below their normal operating pressures not recommended?

    <p>It leaves interior crews with an ineffective stream and without protection</p> Signup and view all the answers

    What is the main advantage of having attack and supply engines operating in series?

    <p>Maximizes the supply and creates a redundancy/fail safe in the system</p> Signup and view all the answers

    What should a pump operator do when facing excessive discharge pressure?

    <p>Alternate between using tank water and supply line in subzero temperatures</p> Signup and view all the answers

    Why is it important for the pump operator to pay attention to residual pressure on the intake gauge?

    <p>To understand the remaining supply and make informed decisions</p> Signup and view all the answers

    In what situation might the Pump Boss believe it is running away from water?

    <p>When the operator opens the deck gun discharge rapidly</p> Signup and view all the answers

    What is recommended for engine operators to note for extended lays?

    <p>The residual intake pressure on the gauge</p> Signup and view all the answers

    When does a hydrant supply generally get established?

    <p>After the initial attack line is set as a master stream sized line</p> Signup and view all the answers

    What should crews do if faced with a sharp drop in Residual Pressure leading to a loss of pressure on interior handlines?

    <p>Gate down interior lines below their normal operating pressures</p> Signup and view all the answers

    Why is gating down interior lines below their normal operating pressures not recommended?

    <p>It may lead to a loss of valuable water and time on scene</p> Signup and view all the answers

    What is the goal of gating down exterior streams?

    <p>To maintain an appropriate pressure on hose lines</p> Signup and view all the answers

    What does a 16-20% drop from Static Pressure indicate?

    <p>Limited available hydrant water and potential need to change tactics</p> Signup and view all the answers

    What does a percentage drop greater than 20% indicate about the remaining water supply?

    <p>Limited available hydrant water and potential need to change tactics</p> Signup and view all the answers

    What is the main advantage of having attack and supply engines operating in series?

    <p>To increase water supply capabilities over longer distance for use on longer hose lays</p> Signup and view all the answers

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