08 - IFSTA Chapter 08 Flashcards
What helps Driver/operators reduce the number of calculations to determine the amount of discharge from hose lines and nozzles on incidents?
Flowmeters
Maintaining reliable flowmeters you must
Maintain in accordance with manufacturers recommendation
Flowmeters read in increments of
10 GPM (40L/min) or less.
Condensed Q fórmula works for which hose lines
3,4,5 inch
Intake pressure can not drop below
20 PSI
Electric hydraulic calculators use preprogrammed formulas to find
Pump discharge pressures
If the flowmeters are reading the proper discharge, but the nozzleman is saying he’s got low water flow. What happened?
Hose burst
Condensed Q formula for 3 inch
FL=Q^2
Condensed Q formula for 4 inch
Fl=Q^2/5
Condensed Qformula for 5 inch
FL=Q^2/15
Ways to speed up calculations on fire incident is to use
Flowmeters,hydraulic calculators and pump charts
A discharge with a flowmeter display must be mounted with in
6 inches
Spring probe has only 1 moving part so it tends to
Require very little maintenance
Flowmeters must be accurate to plus or minus
3%
This stainless steel probe detects movement in the discharge piping
Spring probe
This flowmeter measures speed at which it spins
Paddlewheel
What NFPA standard says for every discharge outlet with a flowmeter a pressure gauge must also be provided
1901
Only a portion of this flowmeter extends into the waterway
Paddlewheel
The greater the flow will cause this probe spring to bend
Spring probe
Paddlewheel placement
Reduces the impediment of water flow and damage by debris
What is the mechanical device installed in a discharge line that senses the amount of water flowing and provides a readout in GPM?
Flowmeter
What is the pressure of the water that leaves the pump and enters the hoseline?
Pump Discharge Pressure
Based on NFPA 1901, flowmeters must display flow in increments of at least how many gallons per minute?
10 GPM or less.
This type of flowmeter is mounted at the top of a straight section of the discharge pipe so that only a small portion of the device extends into the waterway.
Paddlewheel
This type of flowmeter employs a stainless steel spring to detect water movement in the discharge piping.
Spring Probe
A properly calibrated discharge should read within how many percent of the flow?
3%
Intake pressure cannot fall below how many PSI when relay pumping?
20 PSI
What jurisdiction specific resource is on pumpers that aid the DPO in determining the proper PDP for difference lines and nozzles?
Pump Charts
Condensed Q cannot be used for this size line.
1 3/4”
DPOs must be aware that the condensed Q formula results in a difference in friction loss than using the traditional formula. What is the difference?
20% Greater FL
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve?
6”
Which of the following is not an application in which a flowmeter would help a DPO?
Drafting from a dry hydrant
When is the final pressure discharge decided?
After the nozzle has been opened
This device prevents a DPO from relying on the calculations based on friction loss, elevation pressure, and length of hoseline for their PDP.
Flowmeter
If a pressure gauge is mounted at the 6” location, then a flowmeter must be mounted within how many inches?
2”
When using a flow meter in relay pumping, a DPO should continue to increase the engine speed until the flowmeter does what?
Stops increasing
What resource is a slide or dial that can be moved to cover or reveal rates of flow, size of hose, and length of hose in order to come to a conclusion to a problem?
Hydraulic Calculator
In order to create a pump chart, DPOs should compile what?
Nozzles and devices used by the department
Using the GPM flowing method, what is the FL for 100’ of 1 3/4” in Fairfax County?
30
A flowmeter displays in what unit of measurement?
GPM
What is the GPM flowing method applicable to?
Solid and fog streams
What is the condensed Q formula for a 3” hose?
FL=Q^2
What is the TPL in 500’ of 4 inch hose flowing 1,000 gpm?
100psi
Manual version of the calculator consists of a slide or dial that can be moved to cover or reveal all of the following except:
Like Volumes
Electronic hydraulic calculators may be handheld devices or permanently affixed near:
Pump panel
What is often developed by a FD and contains information specifics to that jurisdiction’s equipment and common hose layout operations?
Pump charts
Why members of a fire department should set up a form that clearly identifies the nozzles and devices used as well as any special layouts or applications?
To develop a customized pump chart
When making calculations for pump charts, round pump discharge pressure to the nearest:
5psi
Which of the following is a guideline when making initial calculations?
Ensure that the length of the wyed hoseline layout is the distance between the pumper and the wye
What is the cause of a decreased volume of water at the nozzle without a corresponding change at the flowmeter?
Hoseline burst
What device must display flow in increments of 10gpm or less?
Flowmeters
What type of flowmeter employs a stainless steel spring probe to detect water movement in the discharge piping?
Spring probe
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve for that discharge?
6 inches
What type of information is provided by flowmeters?
Water flow in gpm
What does the flowmeter provide to the driver/operator based on friction loss, elevation pressure and length of the hoseline?
Relieves them from relying on calculations
When are flowmeters advantageous to driver/operators?
Automatic nozzles are employed with handlines or master stream devices.
With proper calibration, a flowmeter in good working order should be accurate to a tolerance of what percentage?
Plus or minus 3%
Which size of hose can the Condensed Q formula be applied to?
3”, 4” and 5”
When using a flowmeter during relay pumping, the driver should ensure that the intake pressure does not drop below what pressure?
20 psi
Apparatus equipped with electronic pressure governors involved in relay pumping, with the exception of the attack pumper, what should the driver operate in?
RPM mode
What NFPA standard deals with Fire Apparatus Driver/ Operator Professional Qualifications?
NFPA 1002
Flowmeters must display flows in increments of what?
10 gpm or less
What type of flowmeter tends to require very little maintenance?
Spring probe
A flowmeter in good working order should be accurate to a tolerance of what?
Plus or minus 3 percent
Intake pressure cannot be allowed to drop below what PSI?
20 psi
Apparatus involved in relay pumping should operate in what mode?
RPM
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve for that discharge?
6 inches
If a pressure gauge is mounted at the 6 inch location then the flowmeter must be mounted within how many inches of the pressure gauge?
2 inches
During standpipe operations, electronic pressure governors will automatically compensate for what, when operating in PSI mode?
Shutting down of hand lines
When making pump charts, what shall you round pump discharge pressures to?
Nearest 5 psi
The condensed Q formula can be used to determine friction loss for the following hose sizes, EXCEPT:
2 inch
What is the condensed Q formula for 3 inch hose?
FL = Q2
The condensed Q formula for 3 inch hose can be used with 3 inch hose with what size couplings?
2.5 or 3 inch
When using the condensed Q formula over, FL = CQ2L, the friction loss will be greater by approximately what percentage?
20 percent
When using the condensed Q formula as opposed to FL = CQ2L. In a hose lay of 1,000 feet of 3 inch. The difference in friction loss can be up to what psi?
50 psi
What is the condensed Q formula for 4 inch hose?
FL = Q2/5
What is the condensed Q formula for 5 inch hose?
FL = Q2/15
The GPM flowing method cannot be used on 2.5 inch hose flowing less than how many gpm’s?
160 gpm
According to NFPA 1901, for every discharge outlet equipped with a flow meter, what shall also be provided?
Pressure guage
In a relay operation, what engine shall be the only engine operating in psi mode?
Attack
How does a flowmeter display water output?
GPMs
When are flowmeters the most adventagous?
When using automatic nozzles
Flow meteres must display flow in increments of:
10
Where are paddlewheel flowmeters mounted on a straight section of discharge?
Top
With proper calibration, a springprobe flowmeter be accuarate within?
3%
Discharges equipped with a flowmeter must have a mounted discharge display within:
6 inches
If a pressure gauge is mounted in conjunction with a flowmeter, the digital flowmeter read out must be mounted within:
2 inches
What is the minum pressure required for an intake?
20 PSI
What operation mode should pumpers equipped with an electronic pressure governor operate in when involved in a relay pumping operation?
RPM mode
What is the equation for determinig friction loss in 3-inch hose using the condesed Q formula?
FL=Q2
What type of information is provided by flowmeters?
water flow in GPM
Which of the following flowmeters uses a stainless steel probe to detect water movment within discharge piping?
spring probe
What is the likely cause for a decrese of water volume at the nozzle yet no reduction in the flowmeter reading?
hose line burst
Using a flowmeter during a relay operation allows pump operators to supply engines without knowing:
the volume of water flowing from the receiving engine
What operational mode should a pumper be placed in when supplying a standpipe?
pressure mode
What is the condesed Q formula for determing friction loss in 4 “ hose?
FL=Q2/5
What is the condesed Q formula for determing friction loss in 5 “ hose?
FL=Q2/15
What stream is the GPM flowing method applicable?
Fog and solid streams
What makes using a flowmeter advantageous for the pump operator?
Reduces the number of pressure calculations required
All of the folowing are methods to determine pump discharge pressure except:
PSI indicators
The actual pressure of the water as it leaves the pump and enters the hoseline, and is the total amount of pressure being discharged by a pump is known as:
Pump discharge pressure
A mechanical device installed in a discharge line that senses the amount of water flowing and provides a readout in units of GPM is known as:
Flowmeter
What should be done to ensure flowmeter reliability?
Must be maintained in accordance with the manufacturers recommendations
Flowmeters measure and display water in what form?
Gallons per minute (GPM)
Because handlines or master streams maintain a predetermined nozzle pressure and a stream thaat appears to be adequate, automatic nozzles may lead you to do what?
Supply an insufficient discharge pressure, creating a low flow.
Based on the NFPA 1901 standard, for every discharge outlet equipped with a flowmeter, a pressure gauge shall also be provided, and and must display flow in incriments of how many GPMs or less?
10 GPMs
What kind of a flowmeter is mounted at the top of the straight section of the discharge pipe and has a sensor measure the speed of the water as it passes?
Paddlewheel flowmeter
What kind of a flowmeter employs a stainless steel spring probe to detect water movement within the discharge piping?
Spring probe flowmeter
A flowmeter in good working order should be accuract to a tolerance of ± what percent?
3%
Each discharge equipped with a flowmeter must have a digital readout display mounted within what distance of the control valve?
6 inches
When relay pumping, the intake pressure cannot be allowed to drop below what pressure?
20 PSI
All engines involved in a relay should be operating is what mode?
RPM mode
Driver/operators must remember to do what after the fire attack team starts flowing water?
Finalize the PDP based on the exact conditions
A chart carried on a fire apparatus to aid the pump operator in determining proper PDP is known as what?
Pump chart
When creating a pump chart, PDP’s should be rounded to the nearest what?
5 PSI
The condensed Q formula may be used for operations in which the friction loss can be determined for what size hose lines?
3-, 4-, or 5- inch
The GPM flowing method is applicable to __ and is calculated using flow in ___.
both solid and fog streams; GPM’s
An easy way to determine friction loss in 2½” hose is to do what?
Subtract 10 from the first two number of the GPMs
When operating an apparatus equipped with a flowmeter, the number and types of nozzles on lines operating from standpipes may be factored in what way?
Add the flow rate for each nozzle toether and pump the volume of water for that rate
The flowmeter relieves the driver/operator from relying on calculations based on all the following except what?
Nozzle pressure
Per NFPA 1901, flowmeters must display flow in increments of how many GPM or less?
10
Which type of flowmeter is mounted on top of a straight section of the discharge pipe so only a small portion of the device extends into the waterway?
Paddlewheel
Which type of flowmeter employs a stainless steel spring probe to detect water movement in the discharge piping?
Spring probe
Which flowmeter requires little maintenance due to the fact that there is only one simple moving part?
Spring probe
Each discharge equipped with a flowmeter must have a digital readout display mounted how far from that control valve for that discharge?
6 inches
At what percent can a flowmeter be accurate to with proper calibration? (plus or minus)
3%
The intake pressure in a relay pumping operation must not drop below what?
20 PSI
What has most likely occured if an attack team members says the volume of water at the nozzle has suddenly decreased but there is no change at the flowmeter?
Hoseline may have burst
What is typically printed on laminated sheets and carried on the apparatus to specify pump discharge pressures?
Pump Chart
How much should pump discharge pressure calculations be rounded up?
To the nearest 5 PSI
The condensed Q formula may be used for operations in which the friction loss can be determined for which hose?
3, 4, or 5 inch hose
What is the margin of difference when using the Condensed Q formula instad of FL=CQ^2L?
20% less
Which tool for determining pump discharge pressure may consist of a slide or dial that can be moved to cover or reveal rates of flow, size of hose, and length of hose layout in order to come to a conclusion of a problem?
Hydraulic calculators
How far from a pressure guage must a flowmeter be mounted?
2 inches
Apparatus equiped with electronic pressure governors set in PSI mode should compensate for what during standpipe operations?
Shutdown of lines when multiple lines are connected to the standpipe
What the term used to describe the actual pressure of the water as it leaves the pump and enters the hoseline?
Pump Discharge Pressure
In order to find the PDP using a pump chart, the DPO must locate the nozzle or the layout in question on the chart, and account for what in the layout?
Number of feet
Using the Condenses Q formula in longer hose lays such as 1000 feet of 3 inch, the difference can be as much as?
50 PSI
Which diameter hose can not be calculated when using the Condensed Q formula?
1 3/4”
What device measures and display water flow in gpm?
Flowmeters
What could lead a driver to supp[y insufficient discharge pressures, creating low gpm?
Automatic nozzles
Flowmeters relieve the drivers from relying on calculations based on friction loss,length of hose and?
Elevation pressure
Based on which NFPA, for every discharge with flowmeter a pressure gauge shall be provided?
1901
In what increments does a flowmeter display flow?
10 gpm or less
Which device has a small portion that extends into the waterway?
Paddlewheel
What device only has one simple moving part?
Spring probe
What happens as water moves past the paddlewheel?
A sensor measures the speed at which it spins
What happens when the spring probe has great water flow?
The more the spring is bent
How could a flowmeter be accurate to a tolerance of plus or minus 3%?
With proper calibration
How far apart must a flowmeter be from a pressure guage?
2 inches
Why is there a digital readout display within 6 inches of control valves?
Because of a flowmeter
How can a driver identify waterflow issues?
With the use of a flowmeter
What happens when water volume at nozzle decreases due to a burst hoseline?
There is no change at the flowmeter
Besides a flowmeter, what else needs to be monitored throughout an incident?
Intake pressure gauge
When does an apparatus operate in rpm mode?
Relay operations
Which is most accurate about, a driver must consider that when a standpipe or hoseline is charged:
There is no flow until nozzle is open
Which formula can not be used with metric measurements?
Condensed Q formula
What is the condensed Qformula for 4 inch hose?
FL=Q²/5
What is the friction loss for an 800’ layout of 5 inch flowing 1,000 gpm?
6.67 psi
Per NFPA 1901, flowmeters must display flow in increments of how many GPM or less?
10
Which type of flowmeter is mounted on top of a straight section of the discharge pipe so only a small portion of the device extends into the waterway?
Paddlewheel
Which type of flowmeter employs a stainless steel spring probe to detect water movement in the discharge piping?
Spring probe
What measurement do flowmeters display water flow in?
GPM
Each discharge equipped with a flowmeter must have a digital readout display mounted how far from that control valve for that discharge?
6 inches
At what percent can a flowmeter be accurate to with proper calibration? (plus or minus)
3%
The intake pressure in a relay pumping operation must not drop below what?
20 PSI
What has most likely occured if an attack team members says the volume of water at the nozzle has suddenly decreased but there is no change at the flowmeter?
Hoseline may have burst
What is typically printed on laminated sheets and carried on the apparatus to specify pump discharge pressures?
Pump Chart
How much should pump discharge pressure calculations be rounded up?
To the nearest 5 PSI
The condensed Q formula may be used for operations in which the friction loss can be determined for which hose?
3, 4, or 5 inch hose
What is the margin of difference when using the Condensed Q formula instad of FL=CQ^2L?
20% less
Which tool for determining pump discharge pressure may consist of a slide or dial that can be moved to cover or reveal rates of flow, size of hose, and length of hose layout in order to come to a conclusion of a problem?
Hydraulic calculators
How far from a pressure guage must a flowmeter be mounted?
2 inches
Apparatus equiped with electronic pressure governors set in PSI mode should compensate for what during standpipe operations?
Shutdown of lines when multiple lines are connected to the standpipe
Which of the following is not a method of determining pressure loss and pump discharge pressure?
Load charts
Round pump discharge pressure calculations to the nearest?
5 PSI
In order to find the PDP using a pump chart, the DPO must locate the nozzle or the layout in question on the chart, and account for what in the layout?
Number of feet
Using the Condenses Q formula in longer hose lays such as 1000 feet of 3 inch, the difference can be as much as?
50 PSI
Why should the driver/operator lower the pressure in standpipe operations when a line is shut down?
The standpipe system will attempt to flow the excess through the remaining hoselines
What type of information is provided by flowmeters?
water flow in gpm
Flowmeters are particularly advantageous when?
supply hoselines or master streams devices equipped with automatic nozzles
The use of a flowmeters relives the driver/operator from?
relying on calculations based on friction loss, elevation pressure, and length of hoseline
flowmeters must provide a readout in increments no larger than?
10 gpm
The type of flowmeter that is mounted at the top of a straight section of discharge pipe so only a small portion of device extends into the waterway is called the?
paddlewheel
The type of flowmeter that uses a sensor to measure the speed at which it spins and translates the information into a flow measurement is called?
paddlewheel
The type of flowmeter that employs a stainless steel spring probe to detect water movement in discharge piping is called the?
spring probe
How accurate should flowmeters be when properly calibrated and in good working order?
plus or mines 5 percent
Each discharge equipped with a flowmeter must have a digital readout display mounted within?
6 inches of the control valve for that discharge
If the volume of water at the nozzle suddenly decreases, but there is no reduction in the flowmeter reading, what is the MOST likely assumption?
the hoseline has burst
Use of a flowmeter during relay pumping makes it possible to feed a supply line without have to now?
the volume of water flowing from the receiving pumper
When conducting standpipe operations, pressure loss due to elevation?
must be accounted for when calculating discharge pressures
When using a flowmeter for rely pumping, ensure that the incoming pressure does not drop below?
20 psi
When operating an apparatus equipped with a flow meter, the number and types of nozzles on lines operating from the standpipe may be factored by adding the flow rate for each nozzle together and pumping the volume of water that?
matches the rate
Manual hydraulic calculations consist of a slide or dial that can be moved to cover or reveal rates of flow, size of hose and?
length of hose layout
An electric hydraulic calculator allows you to input variables of each hose layout and then?
applies preprogrammed formulas to arrive at pump discharge pressures
Which of the following is specified in pump charts?
pump discharge pressure
When calculating the required pump discharge pressure for each of the listed layouts on a pump chart, round pump discharge pressure to the nearest?
5 psi
Which size of hoselines may be used with the condenser Q formula?
3, 4, 5 inch hose
The gpm flowing method is applicable to?
both solid and fog streams
What is considered the actual pressure of the water as it leaves the pump and enters the hoseline?
Pump Discharge Pressure
What is a mechanical deice installed in a discharge line that senses the amount of water flowing and provides a readout in units of gallons per minute?
Flowmeter
How should flowmeters be maintained?
In accoradance wih the manufacteror’s recommendations
Based on NFPA 1901, what must every discharge with a flowmeter be equipped with also?
Pressure Guage
What effect does a greater flow have on a spring probe flowmeter?
The more the spring is bent showing a greater flow
How far away must a digital readout be mounted from the control valve if the discharge has a flowmeter?
Within 6”
When supplying, what should the intake pressure never drop below?
20psi
What should be done during standpipe operations utilizing multiple attack lines if one is shut down?
Lower the pressure accordingly
When should the discharge pressure be finalized?
Once the hoseline is open
What can be carried on a fire apparatus to aid the pump operator in determining the proper pump discharge pressue?
Pump Chart
When should friction loss for master streams be included?
When flowing greater than 350 gpm
What size hose can the Condensed Q Formula be used for?
3”, 4”, 5”
Using the Condensed Q Formula, what is the friction loss when 1000 gpm is being flowed through 500’ of 4”
100
Using the Condensed Q Formula, what is the approximate friction loss when 1000 gpm is being flowed through 800’ of 5”
50
What size hose is not applicable when utilizing the GPM flowing method if flowing less than how many gallons?
2.5”, 160gpm
If using the GPM Flowing method, how much friction loss is accumulated for every 20gpm increase in 2.5” hose flowing 320-400 gpms?
3 psi
Which type of flowmeter reduces the amount of impediment to water flow and lessens the chance of debris in the pipe?
Paddlewheel
If an attackline burts, what readout might the driver/operator notice on the flowmeter?
Decrease
How does a flowmeter assist the driver/operator?
Reduces the calculations required
What should discharge pressure calculations be rounded to?
Nearest 5 psi
what is the actual pressure of water as it leaves the pump and enters the hose line called?
pump discharge pressure
what is the mechanical device installed in a discharge line that senses the amount of water flowing in liters/min?
flowmeter
what flowmeter has one simple moving part that requires little maintenance
spring probe
what flowmeter is mounted at top of a straight section with only a portion of the device in the waterway
paddlewheel
what flowmeter bends with greater flow?
spring probe
what should flowmeter calibrations be accurate to?
3%
how far must a flowmeter be from to a discharge control valve?
6 inches
what happen when nozzleman tells the driver the flow stopped but the flowmeter saying it still flowing?
hose burst
what hose size can the Q formula be used on?
3,4,5
what the Q formula for 3 inch hose?
FL=Q^2
what is the Q formula for 4 inch hose?
FL=Q^2/5
what is the Q formula for 5 inch hose?
FL=Q^2/15
what increments must s flowmeter display in?
10 gpm or less
why is the paddlewheel placed only small portion in the water?
lessen chance of damage from debris
what do pump charts provide answer to ?
pump discharge pressure
what can hydraulic calculators be?
manual or electronic
what uses preprogrammed formulas to get pump discharge pressure?
hydraulic calculators
what must incoming pressure never drop below?
20psi
what mode should engines in a relay be operating in?
rpm
what do driver operators need to account for in standpipe operations?
elevation loss
reduce the number of pressure calculations required of the driver/operator.
flowmeters
Flowmeters measure and display water flow in
gallons (liters) per minute
Mounted at the top of a straight section of the discharge pipe so that only a small portion of the device extends into the waterway.
paddlewheel
Employs a stainless steel spring probe to detect water movement in the discharge piping.
spring probe
With proper calibration, a flowmeter in good working order should be accurate to a tolerance of
plus or minus 3 percent
The intake pressure reading cannot be allowed to drop below how many psi during relay operations?
20 psi
are often developed by a fire department and contain information specific to that jurisdiction’s equipment and common hose layout operations.
pump charts
The driver/operator can use what to determine the pump discharge pressure required for virtually any hose layout without relying on mental calculations?
hydraulic calculator
Round pump discharge pressure calculations to the nearest
5 psi
FL = Q²
Condensed Q Formula (3-inch hose)
is applicable to both solid and fog streams and is calculated using flow in gallons per minute
The gpm flowing method
is not applicable to 2.5 inch hoselines flowing less than 160 gpm.
The gpm flowing method
Ensure that the length of the wyed hoseline layout is the distance between the
pumper and the wye.
What NFPA standard states, for every discharge outlet equipped with a flowmeter, a pressure gauge shall also be provided.
1901
Based on the NFPA® 1901 standard, pressure gauges must display flow in increments of 10 gpm
10 gpm
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve for that discharge?
6
If a pressure gauge is mounted at the 6-inch location, then the flowmeter must be mounted within how many inches adjacent to the pressure gauge?
2
a kink or partially closed valve in the hose layout will cause the flowmeter to register a change in the
meter’s reading
an attack team member sends a message saying that the volume of water at the nozzle has suddenly decreased without a corresponding change at the flowmeter
a hoseline may have burst
Do not let the pump discharge pressures exceed what for the diameter hose or the pumper involved in the calculation?
the test pressure
reduce the number of pressure calculations required of the driver/operator.
flowmeters
Flowmeters measure and display water flow in
gallons (liters) per minute
Mounted at the top of a straight section of the discharge pipe so that only a small portion of the device extends into the waterway.
paddlewheel
Employs a stainless steel spring probe to detect water movement in the discharge piping.
spring probe
With proper calibration, a flowmeter in good working order should be accurate to a tolerance of
plus or minus 3 percent
The intake pressure reading cannot be allowed to drop below how many psi during relay operations?
20 psi
are often developed by a fire department and contain information specific to that jurisdiction’s equipment and common hose layout operations.
pump charts
The driver/operator can use what to determine the pump discharge pressure required for virtually any hose layout without relying on mental calculations?
hydraulic calculator
Round pump discharge pressure calculations to the nearest
5 psi
FL = Q²
Condensed Q Formula (3-inch hose)
is applicable to both solid and fog streams and is calculated using flow in gallons per minute
The gpm flowing method
is not applicable to 2.5 inch hoselines flowing less than 160 gpm.
The gpm flowing method
Ensure that the length of the wyed hoseline layout is the distance between the
pumper and the wye.
What NFPA standard states, for every discharge outlet equipped with a flowmeter, a pressure gauge shall also be provided.
1901
Based on the NFPA® 1901 standard, pressure gauges must display flow in increments of 10 gpm
10 gpm
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve for that discharge?
6
If a pressure gauge is mounted at the 6-inch location, then the flowmeter must be mounted within how many inches adjacent to the pressure gauge?
2
a kink or partially closed valve in the hose layout will cause the flowmeter to register a change in the
meter’s reading
an attack team member sends a message saying that the volume of water at the nozzle has suddenly decreased without a corresponding change at the flowmeter
a hoseline may have burst
Do not let the pump discharge pressures exceed what for the diameter hose or the pumper involved in the calculation?
the test pressure
The actual pressure of the water as it leaves the pump and enters the hose line is called?
PDP
The mechanical device installed in a discharge line that senses the amount of water flowing and provides a readout in GPM’s is called?
Flow meter
Using THIS relieves you from relying on calculations based on friction loss, elevation, and hose length?
Flow meter
A good working flow meter with proper calibration should be within what %?
3
This device has only 1 moving part that is a stainless steel spring probe to detect water movement. What is it?
Spring probe
A discharge equipped with a flowmeter must have a digital readout display within how many inches?
6
When engaging in a relay operation a driver can feed a supply line with out having the attack engines flow. You need a flow meter and what?
Master discharge gauge
The intake pressure gauge can not drop below what ?
20
When multiple lines are flowing from a standpipe what must a driver do?
Monitor each hose line
What do you finalize the pressure discharge with?
Exact conditions
This can be carried on fire apparatus to aid in determining proper PDP?
Pump chart
When creating a pump chart, pump discharge pressures should be rounded to the nearest?
5 PSI
What hose line can NOT USE the condensed Q formula?
1.75
The GPM flowing method is not applicable to 2 1/2” hose lines flowing less than what GPM?
160
The friction loss in 1 1/2” hose is equal to that of a 2 1/2” hose that is flowing how many times more water?
4
What can be used to determine the pump discharge pressure required for virtually any hose lay out?
Hydraulic calculator
What’s the difference between manual and electric hydraulics calculators?
Electric is programable
What nozzle can use the GPM flowing method?
Solid and fog
The condensed Q formula is sufficient for fire ground calculation but the friction loss can be off by what %?
20
When using a flow meter what can it help the driver with?
Water flow issues
What is the term for the actual pressure of the water as it leaves the pump and enters the hoseline?
Pump discharge pressure
What is the mechanical device installed in a discharge line that senses the amount of water flowing?
Flowmeter
Which of these is not a method of determining pressure loss and pump discharge pressure?
Pressure gauge
How do flowmeters display water flow?
Gallons per minute
What is required for every discharge outlet equiped with a flowmeter, as per NFPA 1901?
A pressure gauge shall be provided
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve for that discharge?
10 gpm or less
What type of flowmeter is mounted at the to of a straight section of the discharge pipe so that only a small portion of the device extends into the waterway?
Paddlewheel
What type of flowmeter employes a stainless steel spring probe to detect water movement in the discharge piping?
Spring probe
Which flowmeter has the advantage of only having one simple moving part and tends to require very little maintenance?
Spring probe
Flowmeters in good working order should be accurate to what tolerance?
Plus or minus 3 percent
Each discharge equipped with a flowmeter must have a digital readout display mounted within how many inches of the control valve for that discharge?
6 inches
What may the driver/operstor use to help identify waterflow issues?
Flowmeter
During relay pumping, what will happen to the discharge reading on the flowmeteras you increase the throttle?
It will rise
What mode should apparatus equiped with electronic pressure governors be in while involved in relay pumping operstions?
RPM mode
When can you finalize the pressure discharge based on the exact conditions?
After the hoseline is opened
What are carried on the fire apparatus to aid pump operators in determining the proper pump discharge pressure whan supplying hoselines?
Pump charts
Which of these is not a guideline to observe when making initial pump discharge calculations/
Do not include friction loss for master stream appliances of 350 gpm
What formula may be used for operations in which the friction loss can be determined for 3-, 4-, or 5- inch hose?
Condensed Q Formula (FL=Q^2)
The gpm flowing method is not applicable to 2-1/2 inch hoseline flowing less than what gpm?
160 gpm
The friction loss in 2-1/2 inch hose increases by how many psi for every 10 gpm increase in flow?
1 psi
Which of the following is the equation used to determine friction loss in 4 inch hose using the condensed “Q” formula?
FL=Q25
An electronic hydraulic calculator allows you to input variables of each hose in a layout and then:
applies pre programmed formulars to arrive at a pump discharge pressure
Which of the following scenarios is the flowmeter particularly advantageous?
supply hose lines or master stream devices equipped with an automatic nozzle
The use of a flowmeter relieves the driver/operator from:
relying on calculations based on friction loss, elevation pressure and length of a hose line
Which of the following is specific to pump charts?
pump discharge pressure
When calculating the pump discharge pressure on a pump chart, round the pump pressure to the nearest:
5 psi
Flowmeters must provide a readout in increments no larger than:
10 gpms
Each discharge pressure equipped with a flowmeter must have a digital readout mounted within:
6 inches of the control valve for that discharge
When using a flowmeter for relay pumping, ensure that the incoming pressure does not drop below:
20 psi
As you increase the throttle when using a flowmeter for relay pumping:
the discharge reading on the flowmeter will rise at a corresponding level
Use of flowmeter during relay pumping makes it possible to feed a supply line without having to know:
the volume of water flowing from the receiving pumper
How accurate should flowmeters be when properly calibrated and in good working order?
plus or minus 3 percent
Which of the following best describes the type of flowmeter that is mounted at the top of a straight section of discharge pipe so only a small portion of the deice extends into the waterway?
paddlewheel
What type of information is provided by a flowmeter?
water flow in gpm
When operating an apparatus equipped with a flowmeter, the number and types of nozzles on lines opening from the standpipe may be factored by adding the flow rate for each nozzle and pumping the volume of water that:
matches the rate
If the pressure gauge is mounted 6 inches from a pressure discharge, where is the flowmeter mounted?
within 2 inches
Apparatus involved in a relay pumping operation (with the exception of the attack pumper) that contain an electric pressure governor shall pump in:
RPM
What is the most likely cause of sudden decrease of water volume at the nozzle with no change to the flowmeter readout?
hoseline burst
What position should pumpers with electronic pressure governors be pumping in when conducting a stand pipe operation?
PSI
Which of the following flowmeters require very little maintenance?
spring probe
