10 - IFSTA Chapter 10 Flashcards
Which of the following can be opened in order to prevent the pump from over heating?
Circulator, bypass, or booster cooling valve
The two basic pressurized water supply source included supply hose from another pumper and?
A fire hydrant
Which of the following BEST decribes pumping at a low residual pressure (below 20 psi) while being supplied by other apparatus?
Dangerous
When choosing a hydrant the least desirable hydrant is typicaly located on?
Dead end mains
What is one of the most common ways for a pumper to be supplied with water from a hydrant?
Forward lay
What type of pressure is being displayed on the intake gauge when the pumper is discharging water
Residual
Which of the following BEST decribes how valves should be closed when shutting down the hydrant?
Slowly and smoothly
Most pumps are able to develop a vacuum capacity of approximately how many inches of Mercury?
22 inches of Mercury (Hg)
What is the optimal RPM speed of the pump when drafting?
1000-1200 RPM
How much water should be above a traditional strainer in order for a pump to approuch its rated capacity during drafting operations?
At least 24 inches
Which of the following items placed above the strainer may lessen the chance of a whirpool during drafting operations
Capped plastic jug
Which of the following is the appliance of choice when drafing from a swimming pool?
Low Level Strainer
During drafting operations water below 35 degrees and above 90 degrees may impact the abilty of the pump to?
Reach capacity
To create an effective fire stream during drafting operations, a lift of no greater than _____________ is recommended.
20 feet
Which of following is the most common cause of an air leak when priming the pump?
Open drain or valve
What is the most common place for blockage during drafting operations?
At the strainer
If no specific information is available when supplying a sprinkler system via a fire department connection, the general guidelines is to discharge:
150 PSI
Which of the following standpipe system is MOST likely to be used as the hoseline is stretched and the valve is opened?
Wet
Generally, the friction loss in a standpipe is___________ unless the flows very large.
Small
When troubleshooting during pumping operations you should use___________ to trace the problem to its source.
Logical Process
What is one of the most common ways for a pumper to be supplied with water from a hydrant?
Forward hose lay
Which hydrant mains are least desirable?
Dead-end mains
What should the driver/operator record before they begin to pump?
Static pressure
Why do some fire departments use a four-way hydrant valve?
It allows a second arriving pumper to be connected without interupting the flow, and boost the pressure in the original supply line.
Which method of laying hose starts at the fire scene and ends at the water source?
Reverse lay
Why are newer model pumpers equipped with a check-valve in the tank-to-pump line?
To prevent water from entering the tank under pressure from the pump intake
When a pumper is discharging water, what is the intake gauge displaying?
Residual pressure
What is the atmospheric pressure at sea level?
14.7 psi
What is the first consideration in establishing a draft site?
Site Selection
What is the most important factor in choosing a draft site?
The amount of water available
For a pumper to approach its rated capacity using a traditional strainer, how much water must be over the strainer?
24 inches
All fire pumps meeting NFPA and UL Inc. requirements are rated to pump their capacity at how many feet of lift?
10 feet
While working with 20 feet of lift, the pump operates at what percentage of its capacity?
60%
What is anoter mthod that may be used to employ a Venturi effect to achieve water movement during drafting operations?
Jet siphon
How long does the typical priming action take?
10-15 seconds
While the pump is operating, a gradual increase in the vacuum with no change in the flow rate is an indicator of what?
Blockage
When drafting with a two-stage pump, the transfer valve must be in what position?
Parallel
When supplying a standpipe, multistage pumps should be operated in what position?
Parallel
Many manual standpipe systems are designed to be pumped at what pressure?
150 psi
If you increase the throttle and open the appropriate valves but the pump does not develop pressure, what would be the first step to troubleshoot?
Ensure pump is properly engaged
what 3 sources to supply the pumping operation?
onboard water tank, fire hydrant and static water source
What does IFSTA recommend every time a driver/operator leaves the cab?
chocking the wheels
What can be done to keep air from filling the pump during a transitioning to a supply source?
open the bleeder valve on the gated intake
What is the least desirable hydrants to use?
dead end mains
what does 12% mean using the percentage method for water supply?
2x the amount being delivered
How should changes in water flow happen to avoid water hammers?
slowly and smoothly
Name 3 methods to finding how much additional water is available from a hydrant.
percentage method, first digit method and squaring-the-lines method
What do you create when pumping from a static source and evacuate some of the air inside the pump?
pressure differential (partial vacuum)
What is a hard intake hose considered?
a noncollapsible waterway
What is atmospheric pressure at sea level?
14.7 psi
What is the vacuum capacity of most pumps?
22 inches of mercury
What is happening when you hear the sound of gravel in the pump and pressure gauge is fluctuating?
cavitation
What distance do you need around a traditional strainer?
24 inches
What strainer do you use drafting from a pool or tank?
low level strainer
what do you clean the pump and piping with after using nonpotable water?
fresh water soon after
What is the max a pumper can lift water?
25 ft
What rpm do most priming pumps work best at?
1000-1200 rpm
What can be placed above a drafting strainer if a whirlpool develops?
a beach ball or floating object
What is the most common source of problems while operating a draft?
air leak on intake side of pump
What is the starting pressure of a FDC connection to a standpipe?
150 psi
What is the initial water source on a supression call?
Apparatus water tank
What is the first step that must be done after putting an apparatus in pump gear?
Put down wheel chocks
If there is not an established water supply, what does the DPO need to ensure before they open the valves to send water to attack lines?
Make sure the tank-to-pump is open
If there is not water flowing for an extended period of time, what should the DPO be concerned about?
The pump overheating
Which of the following is not a preferred method of keeping the pump from overheating?
Spraying the engine with water
After connecting the supply line, what should the DPO ensure is open before calling for water?
The air bleeder for that line
Which of the following is not a pressurized water source that a DPO might encounter?
A dry hydrant
Pumping at a low residual pressure while being supplied by another apparatus can be dangerous, what is the minimum pressure the DPO should maintain to avoid supply line collapse?
20 psi
What is the definition of a “dead end main”?
A less desirable hydrant served by smaller mains from only one direction
In this type of lay, one of the risks is running out of LDH before the apparatus gets to the scene.
Forward Lay
In this type of lay, the driver reports to the incident scene first to size up the incident before laying supply line.
Reverse Lay
Regardless of whether an apparatus has a check valve in the tank-to-pump, what should the DPO ensure once they are fully transitioned to an external water supply?
The tank-to-pump is closed
If a DPO uses the percentage method to find their available water and they get a 13% drop, how much more water are they able to supply?
2 times the amount being delivered
If a DPO is flowing 200 gpm, has 90 psi for their static pressure, and the residual pressure is reading 80 psi, how many more gpm can they flow?
2 times the amount being delivered
If a DPO is flowing 250 gpm, has 50 psi for their static and has 35 for their residual, how many more gpm can they flow?
More water might be available but not as much as being delivered
When should the pump be disengaged when shutting down operations?
After the lines are closed and the engine is in idle
What is the atmospheric pressure at sea level?
14.7 psi
Most pumps are able to develop a vacuum capacity of how many inches of mercury?
22
How many inches of water should be above a traditional strainer?
24”
A low level strainer will effectively draft down to a depth of what?
2”
What two actions need to happen before a fire pump is operational?
Position properly, Set parking brake
What should the driver/operator do when water supply or pumping ability may be unattainable or interrupted?
Notify the incident commander
An aerial device may be used to create what using its pre-piped waterway?
External Standpipe
At what pressure many manual standpipe systems are designed to be pumped?
150psi
When the standpipe is charged, water will be discharged at all points where:
Caps are off & valve is open
How is the friction loss generally in the standpipe?
Small
Which standpipe system can be used as soon as a hoseline is streched and the valve is opened?
Wet pipe system
When supplying a standpipe, 25psi pressure loss will be needed for flows :
350gpm and higher
When should the driver/operator pump 150psi into the FDC?
When specific information is unavailable
Sprinkler systems are designed to support the flow of a specific number of sprinklers based on:
Hazard been protected
What is an indication when a gradual increase in the vacuum may be noted with no change in the flow rate?
A blockage is developing
What often is the cause of a blockage during a draft?
After the pump has been operating at a high rate of discharge
All of the following are problems that may occur during drafting operations except:
A steady stream is flowing
When should the throttle setting be slowly increased before attempting to open any discharges?
After succesfully priming the pump
What device may be used as another method of employing a venturi effect to achieve water movement during drafting ops.?
A jet siphon
A pumper in good working condition can lift water to a maximum of how many feet?
25
What is the most important factor in choosing a drafting site?
Amount of water available
What is the surest indication of pump cavitation?
Lack of reaction on the pressure gauge to increases in the throttle
What is the approximate vacuum capacity that most pumps are able to develop?
22 inches of mercury
Which is the formula to find Percent drop?
(Static-residual)/100/static
When does putting the pump in gear begin?
After apparatus is properly positioned and parking brake set
When does IFSTA recommend chocking the wheels?
Everytime the driver/operator exits the cab
Driver/operators should maintain a residual pressure of at least what?
20 psi
What type of hydrant is the least desirable?
Dead end hydrant
What is one of the most common ways for a pumper to be supplied with water from a hydrant?
Forward lay
When using 2 1/2 inch or 3 inch hose lines to supply a pumper, what should you do?
Keep the distance as short as possible
When making a reverse lay and using hose with threaded couplings, what coupling is to come out of the hose bed first?
Male coupling
When is it not necessary to use a four way hydrant valve?
Reverse lay
When the pump is full of water and there is no water flowing, what type of pressure is shown on the master intake gauge?
Static pressure
When should the driver/operator record the static pressure?
Before he/she begins to pump
After calculating the available water using the percentage method, you get 13 percent. How much more water can you supply?
2 times the amount being delivered
What is atmospheric pressure at sea level?
14.7 psi
What is the most important factor in choosing a suitable drafting site?
Amount of water available
In order for a pumper to approach its rated capacity using a traditional strainer, how many inches of water must be surrounding the strainer?
24 inches
All fire pumps meeting NFPA and Underwriters Laboratories Inc. requirements are rated to pump their capacity at how many feet of lift?
10 feet
A pumper in good working order can lift water a maximum of how many feet?
25 feet
In order to create an effective fire stream, a lift no greater than how many feet is recommended?
20 feet
Most priming pumps are intended to work most effectively when the engine is set at what rate?
1,000 to 1,200
How long does the entire priming action typically take from start to finish?
10 to 15 seconds
What is the most common failure to a prime?
Air leak
which of the following is not considered to be a water supply according to ifsta?
fire department tender
Which of the following water sources is used as the sole water supply on many incidents?
on board water tank
If the incident requires additional water from the on board tank, the driver/operator will then transition to:
an external water source
What is the first step in putting the pump into gear?
setting the parking brake
What is the first step the pump in to operation?
open the tank to pump valve
what are the two most common types of pressurized water sources?
fire hydrants and supply hose from another pumper
The driver/operator should maintain a residual pressure of at least:
20 psi
What is the most common method for deploying supply hose to a pumper to be supplied from a hydrant?
a forward hose lay
Which of the following best describes a reverse lay?
laying hose from the fire to the water source
Which of the following best describes static pressure within a water system?
when the pump is full of water with no water flowing
What position should the transfer valve be set in when operating in a relay system?
volume or parallel mode
What is being created when evacuating the air from within the pump creating a pressure differential?
a partial vacuum
What is the atmospheric pressure at sea level?
14.7 psi
When creating pressure to acquire water from a static water source, the driver operator must evacuate some of the air from the pump and intake hose which in turn:
reduces atmospheric pressure within the pump
What is the pressure readout on the compound gauge when the a partial vacuum is created?
negative 2 psi
The ability to overcome losses in pressure is limited to:
atmospheric pressure at sea level
How much space should be around the strainer in order for a pumper to reach its total capacity?
24 inches
When should the pump and piping of apparatus be hourly flushed?
each time after using nonpotable water
Water temperature will affect drafting operations. The ideal temperature of water from a static water source is between:
35 degrees and 90 degrees
What is the most common source of problems while operating at draft?
air leak on the intake side of the pump
What step should a driver/operator take every time they go to exit the cab?
Ensure the wheels get chocked
When pumping water from an onboard water source, the first step (after putting the engine in pump gear) to start pumping water involves the driver/operator doing what?
Opening the tank-to-pump valve
The first step in transitioning to an external water supply is what?
Connect the supply line to the appropriate intake
What are the two basic pressurized water sources that a driver/operator will most commonly encounter?
A fire hydrant or a supply hose from another pumper
Drivers should maintain a residual pressure of what PSI?
20 PSI
What are the least desirable hydrants to try and establish a water supply at?
Dead end hydrants
The method of laying hose from the water supply to the fire scene is known as what kind of lay?
Forward lay
If using 2½” or 3” line to supply a pumper from hydrant pressure, what should be done to ensure excess friction loss is avoided?
Keep the distance as short as possible
When a hoseline is laid from the fire to the water source, this is known as what kind of lay?
Reverse lay
Which of the following is considered to be medium diameter hose (MDH)?
3 inch hose
What step should a driver/operator take after transitioning to an external water supply?
Close the tank-to-pump valve
If the master intake gauge reaches 20 PSI, what should the driver/operator do with the throttle?
Should NOT be increased to avoid cavitation
What can a driver/operator do to avoid overheating when operating as part of a relay?
Flow the booster line back into the tank to move water continuously
When operating a two-stage pump, what must the driver/operator do before increasing the throttle?
Set the transfer valve
Which of the following is NOT one of the methods available to determine the additional availability of water from a hydrant?
Flow-metering method
How should changes in flow be made?
Slow and smooth
The friction loss in a hose depends on its __ and __.
Diameter; length
For each ____ of altitude gain, pressure decreases 1 inch/Hg.
1000 feet
In order for a pumper to reach its maximum pump capacity while drafting, how much water must be over the strainer?
24 inches
What should the temperature of water be between to avoid adversely affecting drafting operations?
35˚-90˚F
Where is the most common place for a blockage to occur?
Strainer
What is the most common problem when operating at a draft?
Air leak on the intake side of the pump
A pressure reducing valve installed on a standpipe usually reduces water pressure to what psi?
100 psi
What should be done if a prime has not been achieved in 10 to 15 seconds?
Stop and trace the problem
How many inches of mercury should the master intake gauge read for every foot of lift?
1 inch
When drafting with a steep slope at the waters edge, what shall you place near the intake hose?
Roof ladder
Most priming pumps are designed to work effectively when the engine is set between what rate?
1,000 to 1,200 rpm
In order to create an effective fire stream, what is the maximum lift recommended?
20 feet
When using a portable tank or swimming pool to draft, what type of appliance is the best to use?
Low level strainer
What simple object can be placed above a strainer to prevent a whirlpool?
Beach ball
In order to avoid drawing in foreign objects such as sand and gravel, how many inches of water should be around the strainer?
24 inches
What is the most important factor in choosing a draft site?
Amount of water available
What is a sure sign of cavitation?
Lack of reaction on the pressure gauge
Most pumps are able to devlop a vacuum capacity of what?
22 inches of mercury
Using the squaring the lines method, what is the assumed gpm for 1 3/4” hose line?
175 gpm
When using the squaring the lines method, the driver/ operator must note what before any pump discharges are opened?
Static pressure
Pumping below what pressure may cause supply hose to collapse?
20 psi
What type of hydrants should gate valves be attached?
Dry barrel
When does IFSTA recommend chocking the wheels?
Every time the driver/operator exits the cab
Most apparatus are designed so that the procedure for making the pumper operational is performed from where?
Inside the cab
What is the sole source of water supply for many incidents?
Onboard water tank
While being supplied by other apparatus is equally dangerous and driver operators should not pump below what pressure?
20 PSI
A water main that is not looped and in which water can flow in only one direction is called what?
Dead end main
The pump throttle must not be increased further due to risk of cavitation if the master intake gauge reaches what?
20 PSI
Methods used to determine how much more water can supply are all of the following except what?
Residual water method
Atmospheric pressure at sea level is what?
14.7
For a pumper to approach its rated capacity using a traditional strainer, there must be at least how much distance of water around the strainer?
24 inches
The entire priming action should typically take how long from start to finish?
10 - 15 seconds
The most common inability to prime is what?
Air leak
Problems that may occur during drafting operations fall into the following general catagories except what?
Apparatus issue
When specific information is unavailable, driver/operators should pump into the FDC when supporting automatic sprinklers systems at what PSI?
150 PSI
What is the valve installed at standpipe connection that is designed to reduce the amount of water pressure at that discharge to a specific pressure, usually 100 PSI?
Pressure-Reducing valve
The driver/operator should use a logical process to trace the problem back to its source and then attempt to what?
Troubleshoot the problem
Each time nonpotable water is pumped through the apparatus, the pump and piping should be thoroughly flushed with fresh water when?
Soon afterwards
A low level strainer is designed to sit directly on the bottom of a tank or pool and allow water to be effectively drafted down to a depth of approximately how much?
2 inches
A pumper in good working order can lift water a maximum of how many feet?
25
In order for a floating strainer to work properly, it must what?
Float freely
What may result when a pump has been equipped with inadequate piping from the water tank?
Cavitation
What method is a quick and easy way to calculate available water using psi and gpm?
First-digit method
The most common cause of an air leak is what?
Open drain or valve
What is the pressure reffered to when a pumper is connected to a hydrant and is not discharging water?
Static pressure
2 1/2 and 3-inch hose is considered what size hose?
Medium Diameter Hose
How much water around a traditional strainer must there be in order for a pumper to approach its rated capacity?
24 inches
Below what level on the master intake gauge does cavitation become possible?
20 PSI
No more than how much lift is recomended for drafting operations?
20 feet
What is the max lift for drafting operations?
25 feet
What is the purpose for not increasing the throttle if the master intake gauge reaches 20 PSI?
Risk of cavitation
Low level suction strainers can effectively draft down to a depth of?
2 inches
At what level of lift are fire pumps required to pump their rated capacities at draft?
10 feet
What percentage drop in pumper intake pressure indicates 2 like volumes being still available?
11-15%
What is the term used to describe the effect of altering the atmospheric pressure within a confined space by mechanical means?
Pressure Differential
What is the atmospheric pressure at sea level?
14.7 PSI
Most pumps are able to develop a vacuum capacity of approximately how man inches of mercury?
22
Due to the rapid intake of water into the strainer, what my result that allows air into the intake hose, causing a pump to lose its prime?
Whirlpool
The entire priming action typically requires how long, from start to finish?
10-15 seconds
What PSI should an FDC initially be charged as a general guidline?
150 PSI
What is the pressure/appliance loss for a standpipe system?
25 PSI
What should the DPO do any time nonpotable water is pumped through the apparatus?
The pump and piping should be thoroughly flushed with fresh water
What is the name of a hydrant served by smaller mains from only one direction?
Dead end hydrant
How much decrease in atmospheric pressure is there for every 1,000 feet of altitude gain?
.5 PSI
What does it mean when you say “putting the pump into gear?
making the fire pump operational
If the nozzle of at attack line is already open when putting the pump into operation?
air will bleed off
Which of the following BEST decribes pumping at a low residual pressure (below 20 psi) while being supplied by other apparatus?
Dangerous
The two basic pressurized sources include a supply hose from another pumper and?
a fire hydrant
The most common method of supplying water via hose is?
Forward lay
The most direct method for suplementing hydrant pressure or perfroming drafting operations is?
reverse lay
Which of the following BEST decribes how valves should be closed when shutting down the hydrant?
Slowly and smoothly
Most pumps are able to devlop a vacuum capacity of approximately?
22 inches of Mercury (Hg)
What is the optimal RPM speed of the pump when drafting?
1000-1200 RPM
How much water should be above a traditional strainer in order for a pump to approuch its rated capacity during drafting operations?
At least 24 inches
Which of the following items placed above the strainer may lessen the chance of a whirpool during drafting operations
Capped plastic jug
Which of the following is the appliance of choice when drafing from a swimming pool?
Low Level Strainer
During drafting operations water below 35 degrees and above 90 degrees may impact the abilty of the pump to?
Reach capacity
Although cavitation can occur when operating from a hydrant system its often?
drafting during operations
Which of following is the most common cause of an air leak when priming the pump?
Open drain or valve
What is the most common place for blockage during drafting operations?
At the strainer
The priming action should not be halted until a steady stream of water is discharged and?
all air has been removed
Which of the following standpipe system is MOST likely to be used as the hoseline is stretched and the valve is opened?
Wet
The transfer vavle must be in the parallel position when priming?
two statge pumps
The engine RPM should be kept as low as possible without causing the engine to stall when using a?
vacuum type type primer
what the least desirable hydrant
dead end main
what action makes a hydrant operable and lessen chance of debris entering the intake?
flushing the hydrant
what residual pressure must driver/operators maintain when using a hydrant
20psi
who does s driver/operators tell if they have trouble delivering the necessary pressure or volume of water?
incident commander
what process does a driver/operator use when having an issue?
logic process
what pumper takes water from source to the attack pumper?
water supply pumper
what it called when you laid hose from fire to the source?
reverse lay
what is the most common source of problems when drafting?
air leak on the intake side of pump
what type of strainer helps where whirlpooling might be an issue?
floating strainer
what damaged may lead to the inability to achieve or maintain a draft?
damaged ore leaking tank-to-pump
what can most pumps develop a vacuum capacity of?
22 inches of mercury
how much water needs to be over a traditional strainer?
24 inches
what happens if water is below 35 F or above 90F in drafting?
might not reach capacity
what must be created to evacuate some air in the pump?
pressure differential
what does 1 inch of mercury equal in drafting?
1 ft of lift
how long should priming usually take start to finish?
10 to 15 seconds
how long can priming take up to on pumps larger than 1250 gpm?
45 seconds
what do you supply a sprinkler system at?
150 psi
how much pressure loss approximately for each floor of fdc?
5psi
what is atmospheric pressure at sea level?
14.7psi
Making a fire pump operational, commonly referred to as
putting the pump into gear
IFSTA recommends that the wheels be chocked every time the driver/operator
Exits the cab
basic pressurized water supply sources that a driver/operator will encounter are a
fire hydrant or supply hose from another pumper
Pumping at a low residual pressure of what psi can be damaging to the pump?
20
Pumping at a low residual pressure of 20 psi can lead to what?
Cavitation
Water supply systems must maintain a residual pressure of at least 20 psi (140 kPa) within their mains for several reasons; contamination from sources outside the main may occur if
the pressure in the main drops too low
served by smaller mains from only one direction
Dead end mains
Typically the least desirable hydrants are those located on
Dead end mains
These hydrants generally have higher amounts of sediment and deterioration, which further reduce their capacity
Dead end mains
consists of stopping at the hydrant, dropping the end of one or more supply hoselines at the hydrant, and then proceeding to the fire location
Foreward lay
it is possible to evacuate some of the air inside the pump creating a
Pressure differential
water being discharged faster than it is coming into the pump
Cavitation
The most important factor in choosing the draft site is the
Amount of water available
In order for a pumper to approach its rated capacity using a traditional strainer, there must be at least how many inches of water over the strainer?
24
It is also helpful to have at least how many inches of water all around the strainer in order to avoid drawing foreign objects such as sand or gravel into the pump?
24
What placed above the strainer may lessen the chances of a whirlpool?
A floating object
A low level stranger can be drafted down to a depth of
2 inches
What water temperatures will affect drafting operations?
Water below 35°F or above 90°F
Although almost any type of water may be used for fire suppression, pumping what kind of water may be harmful to the pump?
Non potable
Each time non potable water is pumped through the apparatus the pump and piping should be
Flushed
When do you ‘ put the pump in gear”?
When positioned and parking break is set
IFSTA recommends that wheels chocks be used when?
When the driver exits the cab
If water is not flowing for an extended period of time, what is a concern?
The pump over heating
What must a driver pay close attention to when using on board water supply?
Water level
When using on board water supply what must the driver communicate to units in the hazardous areas?
When water level in getting low
When the pump is using onboard water and you switch over to a supply line, what is a concern that needs to be addressed?
Air in the line
What is the residual pressure?
20 PSI
What of the following is NOT a potential issue with a low residual pressure?
Friction loss
A water main that is not part of a loop and only flows in 1 direction is called?
A dead end main
A method of laying hose from the water supply to the fire is called?
Forward lay
A pumper that is positioned at the fire scene directly supplying hose lines is called?
Attach pumper
The effect of altering the atmospheric pressure in a confined space by mechanical means is called?
Pressure difference
When pumping at the rated capacity how many inches must be around the strainer?
24
Non tested or treated water is called?
Nonportable
When the pump is air tight a vacuum will register on the intake gauge. This reading should equal what ?
1” mercury to 1’ of water
What is the typical time to draw a draft?
10-15 seconds
What is the most common cause of n air leak in drafting?
Open valve/drain
What is the general guideline to discharge pressure for a stand pipe?
150
Pressure reducing valves are usually set to what PSI?
100
When supplying stand pipe systems do not exceed what PSI unless the system has been tested for it?
185
If you increase the throttle and open the appropriate valves but the pump does not develop pressure, what would be the first step to troubleshoot?
Ensure pump is properly engaged
While the pump is operating, a gradual increase in the vacuum with no change in the flow rate is an indicator of what?
Blockage
What should the driver/operator record before they begin to pump?
Static pressure
Why do some fire departments use a four-way hydrant valve?
It allows a second arriving pumper to be connected without interupting the flow, and boost the pressure in the original supply line.
Which method of laying hose starts at the fire scene and ends at the water source?
Reverse lay
Why are newer model pumpers equipped with a check-valve in the tank-to-pump line?
To prevent water from entering the tank under pressure from the pump intake
When a pumper is discharging water, what is the intake gauge displaying?
Residual pressure
What is the atmospheric pressure at sea level?
14.7 psi
What is the first consideration in establishing a draft site?
Site Selection
What is the most important factor in choosing a draft site?
The amount of water available
For a pumper to approach its rated capacity using a traditional strainer, how much water must be over the strainer?
24 inches
All fire pumps meeting NFPA and UL Inc. requirements are rated to pump their capacity of how many feet of lift?
10 feet
While working with 20 feet of lift, the pump operates at what percentage of its capacity?
60%
What is another method that may be used to employ a Venturi effect to achieve water movement during drafting operations?
Jet siphon
How long does the typical priming action take?
10-15 seconds
Which hydrant mains are least desirable?
Dead-end mains
When drafting with a two-stage pump, the transfer valve must be in what position?
Parallel
When supplying a standpipe, multistage pumps should be operated in what position?
Parallel
Many manual standpipe systems are designed to be pumped at what pressure?
150 psi
What is one of the most common ways for a pumper to be supplied with water from a hydrant?
Forward hose lay
Which of these is not a water source to supply a pumping operation?
Garden hose
What does “making the fire pump operational” mean?
Putting the pump into gear
Which of these is not a way to reduce heat from the pump, while the pump is operating?
Keep nozzles closed
What are the two basic pressurized water supply sources?
Fire hydrant and supply hose from another pumper
What is the minimum residual pressure that a driver/operator should maintain on their master intake gauge?
20 psi
Which type of lay do you lay hose from the water source to the fire scene?
Forward lay
What can be attached to unused hydrant discharges which allow other connections to be made without interruption of flow?
Gate valve
Which type of lay do you lay hose from the fire scene to the water supply?
Reverse lay
What should the driver/operator do after transitioning from onboard water source to an external water supply?
Close the tank-to-pump valve
How do you get an accurate static pressure reading?
When the pump is full of water and the pressure in the system has stabilized with no water flowing
What does the intake gauge display when the pumper is discharging water?
Residual Pressure
What does the difference between static pressure and residual pressure determine?
How much water the hydrant can supply
When using the percentage methode to calculate additional water, how many additional lines can be supplied if the percentage is 10 or less?
3 lines
What is the atmospheric pressure at sea level?
14.7 psi
Which of these is not an indicator that a pump is cavitating?
The pump sounds like it is humming as it is running
How much space is needed around a traditional strainer for a pumper to approach its rated capacity while drafting?
At least 24 inches
Low-level strainers can effectively draft water down to a depth of approximately how many inches?
2 inches
NFPA requires that all fire pumps be able to pump their rated capacity at how many feet of lift?
10 feet
What is the most common failure to getting a prime?
Air leak
What is the starting pressure for the FDC?
150 psi
