42 Questions
Which mode on the Pump Boss allows the operator to control the pump's output pressure?
Pressure Mode
What is the main advantage of using a series water supply?
Ability to maintain continuous water flow
How are discharge relief valves different from Pump Boss?
Discharge relief valves protect against excessive pressure
What are the three main priorities for drivers/pump operators?
Ensuring water supply, setting and maintaining discharge relief valves, controlling pump output pressure
What is the purpose of intake relief valves?
Protect against excessive suction pressure
What does the debate about single-stage vs. two-stage pumps primarily focus on?
Pump efficiency
What is the number one goal of any pump operation?
To establish a constant water supply to interior attack crews
Why is close monitoring of residual intake pressure critical for the safety of crews operating in an IDLH atmosphere?
To maintain at least a 10 PSI residual pressure
What is the purpose of setting up a series water supply according to the text?
To offer many advantages over a simple water supply
What is the role of a known amount of water engine connecting to the water main and beginning operations according to the text?
Affecting the available water supply
Where was the formula for calculating remaining supply based on the percentage drop obtained from?
Fire Service Hydraulics and Pump Operations by Paul Spurgeon
What is viewed as a safety net by many pump operators according to the text?
A good water supply
What is the initial pressure considered when water is brought into the pump from one of the intakes?
Static Pressure
What should engine operators note to provide an accurate estimate of available water if the incident escalates and requires more water?
Initial intake pressure
How is the percentage drop calculated when estimating the remaining flow in the system?
Divide the PSI drop by the initial intake pressure
In a scenario with a 0-10% drop, how is the remaining supply estimated?
Three times the amount that caused the drop
For an 11-15% drop, how is the remaining supply estimated?
Twice the amount that caused the drop
What does a 16-20% drop from Static Pressure indicate?
The same amount that caused the drop remaining in the system
What does a percentage drop greater than 20% indicate about the remaining water supply?
Half of the amount that caused the drop remaining in the system
What should crews do if faced with drops greater than 20%?
Carefully monitor their intake pressure when opening more discharges
What allows an operator to make an accurate determination of the remaining supply?
$GPM$ of the discharge
When is a hydrant supply generally established?
Before flowing water from attack line/s
What is recommended for engine operators to note for extended lays?
Initial static pressure whenever possible
What should crews do to avoid a sharp drop in Residual Pressure leading to a loss of pressure on interior handlines?
Carefully monitor their intake pressure when opening more discharges
What is the primary reason for placing engines in series?
To maximize the supply and create a redundancy/fail safe in the system
Why should the supply engine be placed as close as possible to the hydrant?
To reduce friction loss from the positive source (hydrant)
Why is gating down interior handlines less desirable than gating down exterior lines?
Interior handlines are more susceptible to sudden loss in nozzle pressure due to a sudden reduction of residual pressure
When should interior lines be gated down according to the text?
When other avenues of reducing pressure have already been tried
What is the goal of gating down exterior streams?
To divert water to other streams and protect exposures
Why is gating down interior lines below their normal operating pressures not recommended?
It leaves interior crews with an ineffective stream and without protection
What is the main advantage of having attack and supply engines operating in series?
Maximizes the supply and creates a redundancy/fail safe in the system
What should a pump operator do when facing excessive discharge pressure?
Alternate between using tank water and supply line in subzero temperatures
Why is it important for the pump operator to pay attention to residual pressure on the intake gauge?
To understand the remaining supply and make informed decisions
In what situation might the Pump Boss believe it is running away from water?
When the operator opens the deck gun discharge rapidly
What is recommended for engine operators to note for extended lays?
The residual intake pressure on the gauge
When does a hydrant supply generally get established?
After the initial attack line is set as a master stream sized line
What should crews do if faced with a sharp drop in Residual Pressure leading to a loss of pressure on interior handlines?
Gate down interior lines below their normal operating pressures
Why is gating down interior lines below their normal operating pressures not recommended?
It may lead to a loss of valuable water and time on scene
What is the goal of gating down exterior streams?
To maintain an appropriate pressure on hose lines
What does a 16-20% drop from Static Pressure indicate?
Limited available hydrant water and potential need to change tactics
What does a percentage drop greater than 20% indicate about the remaining water supply?
Limited available hydrant water and potential need to change tactics
What is the main advantage of having attack and supply engines operating in series?
To increase water supply capabilities over longer distance for use on longer hose lays
Test your knowledge of firefighting hose operations with this quiz. The quiz covers topics such as supply engine water distribution, hose lay capabilities, and initial defensive operations.
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