11 - IFSTA Chapter 11 Flashcards
The difference in elevation between the surface of the static water supply and the center of the pump intake is defined as?
Lift
During the drafting process, how should the intake hose pressure correlate to atmospheric pressure?
It must be less than
For every 1,000 ft of altitude, how much is the approximate decrease in atmospheric pressure?
0.5 psi
What is the term referring to the height a column of water may be lifted in sufficient quantity to provide a reliable fire flow?
Dependable lift
When rating all fire department pumping apparatus, what is the minimum lift generated while drafting from the center of a pump intake to the surface of water?
10 ft
What devices may draw water as shallow as 1-2 inches?
Low-level strainers
When drafting from a natural water source, what may be used to support an intake hose and strainer from resting on or near the ground?
Ladder
What type of hydrants allow for more efficient access to a natural supply source through a pre-piped installation?
Dry
The formula for determining the capacity of a square/rectangular pool is?
C = 7.5 x L x W x D
The formula for determining the capacity of a round pool is?
C = 7.5 x Pi x r^2 x D
When calculating the theoretical lift, what must be done after determining the atmospheric pressure of an area in relation to the water’s pressure per square inch while inside the intake hose?
Multiply them
After factoring in the surrounding atmospheric pressure and friction loss in the intake hose, how many feet of dependable lift should every properly operating fire pump have?
14.7
Driver/operators should be able to evaluate conditions that affect static water source accessibility. Which of the following in itself is not a condition for concern?
flat water
Although it may vary based on atmospheric pressure, how many feet is maximum lift normally?
25
Since a total vacuum is not attainable using fire department pumpers, this means that pumpers cannot be expected to draft water that is located how many feet below the pumper?
33.9
Using the formula for determining maximum lift, what is the maximum lift when the intake gauge reads 12 Hg(inches of Mercury)?
13.56
Regardless of the intake method, what action is required after any pumping operation causing salt or dirty water to be drawn into the pump?
Flush with clean, fresh water
Which device may be used for water as shallow as one foot?
Floating strainer
What is the volume capacity of a square/rectangular pool that is 33 feet wide, 110 feet long, and has an average depth of 9 feet?
245,025 gallons
What is the volume capacity of a round pool that is 25 feet in diameter with an average depth of 8 feet?
29,452.43 gallons
What is theoretical lift when lifted by atmospheric pressure in a true vacuum ?
33.9
What is Maximum lift when raised through a section of hard sleeve hose to a pump?
25
What is dependable lift when friction and pressure loss are added to the suction hose?
14.7
Which of the following is NOT a problem when determining a static water supply?
Hard/Dry Ground
Pumpers may not be able to reach the water in all areas regarding drafting operations which of the following is a factor(s)?
All the above
Which of the following is the greatest height to which any amount of water may be raised through an intake hose to the pump?
Maximum Lift
If water does not rise to the level of the pump intake, drafting:
Will not be possible
In general, which of the following is the driver/operator Most concerned with?
Dependable Lift
Which of the following must account for all factors that contribute to the amount of work required by a pump to produce a fire stream?
Net pump discharge pressure
When evaluating a potential natural water source, what two factors must be considered first?
Adequacy and accessibility
Which of the following is most likely to cause a rollover of the fire apparatus?
Operating apparatus on unstable terrain
Which of the following is mostly likely to be placed at some natural water sites to create adequate water supply availability?
Dry Hydrants
Which of the following is the equation for determining the capacity of a square/rectangular pool?
7.5 x L x W x D
Which type of strainer requires 2 feet of water all around the strainer?
Barrel Strainer
Which of the following may be used when water is as shallow as 1 foot?
Floating strainer
An underground water storage receptable usually found in an area not serviced by a hydrant system is called?
A cistern
Which of the following equations determines the capacity of a round pool?
7.5 x 3.14 x r2 x D
Water is supplied through open cannels and portable pipes for:
Agricultural irrigation system
Connections similar to a dry hydrant for a quick fire department hook-ups may be available on?
Large indoor or outdoor swimming pools
Which of the following must be done after salt and dirty water is drawn into the pump?
Pump must be flushed with clean fresh water
What is the difference in elevation between the surface of the static water supply and the center of the pump intake?
Lift
What is the definition of theoretical lift?
Scientific height that a column of water may be lifted by atmospheric pressure in a true vacuum
How many gallons are in one cubic foot?
7.5
What is the definition of maximum lift?
maximum height to which any amount of water may be raised through a hard suction hose to a pump
Generally, you will be more concerned with a concept that is defined as, “the height a column of water may be lifted in sufficent quantity to provide a reliable fire flow.” what is this concept called?
Dependable Lift
What must account for all factors that contribute to the amount of work required by a pump to produce a fire stream?
Net Pump Discharge Pressure
When considering a major lake or river, what is generally not a major problem?
Adequacy
Two feet of water all around is considered the minimum what type of strainer?
Barrel Strainer
Which type of strainer may be used for water as shallow as one foot?
Floating Strainer
Which type of strainer is most commonly used to draft from a portable water tank?
Low-Level Strainer
What is defined as, “cleaning a fire pump or piping by flowing water through it in the opposite direction of normal flow?”
Back flushing
What is the formula for calculating the amount of available water from a rectangular or square pool?
Lengt x Width x Average Depth x 7.5
What is the formula for calculating the amount of available water from a round pool?
7.5 x π x r² x Average Depth
What is the gallonage of a rectangular pool that is 30’ long, 15’ wide, 3’ deep in the shallow end, and 9’ deep in the deep end?
20,250 Gallons
What is the gallonage of a ciruclar pool that is 100’ across and 8’ deep?
471,238 Gallons
What should be done after drafting from a static water source that is not a draft pit?
Flush the pump with clean water
What is the definition of a cistern?
Water storage recepticle that is usually underground and may be supplied by a well or rainwater runoff
What is the constant in the pressure correction formula?
2.3
What must be attached to all intake hoses when drafting from a natural water supply source?
Strainer
What is a major factor in determining the useability of a static water supply source?
Accessibiilty
What capacity is a pump with a 20ft lift?
60%
What happens to water to water capacity of a pump, as the lift or friction loss in hard intake hose increases
decreases
What are some problems that may impede access to drafting?
wet/soft ground/freezing water/inadequate depth
What can be used to supply land based pumpers from fresh or salt water?
fire boats
What water sources is man made with similar characteristics as a pond or lake?
ground reservoirs
What water source has water in open canals and portable pipes?
agricultural irrigation systems
what is the formula to find a round pool capacity? (in gallons)
C= 7.5 x 3.14x r^2 xD
what is the formula to find a square pool capacity? (in gallons)
C=7.5xLxWxD
what water storage is usually underground and supplied by well or rain water?
cisterns
What is something all firefighters need to wear working close to water?
personal flotation device
what can be used in a small, fast running stream to raise the level of water?
a ladder and salvage cover
What is the depth a floating strainer can be used?
1ft
What is the maximum height water can be lifted through a hard suction hose to the pump?
25ft
what is the formula for determining maximum lift?
L=1.13Hg
What is the maximum height a column can be lifted in a draft? (theoretical)
33.9ft
What happens if water does not rise to the level of the pump intake while priming?
draft will not happen
What is the difference between elevation from the surface of the static water supply to the center of pump intake called?
lift
How many feet is “Dependable lift”?
14.7ft
What can fire dept do to ensure access to drafting sites?
pre incident planning
What is it called when you clean a fire pump or piping by flowing water through it in opposite direction of normal flow?
back flushing
This is the difference in elevation between the surface of the static water supply and the center of the pump.
Lift
What is the device that exhausts air from an intake hose and fire pump when drafting?
Priming Device
The process of creating a pressure difference between the inside of the pump, the intake hose, and the atmosphere is called what?
Priming
Because the pressure outside the intake hose is higher than the pressure in the hose, water does what?
Water is forced in until the pressure within the pump equals atmospheric pressure
The maximum height of the lift when drafting is affected by what?
The amount of vacuum that the priming device can produce and the existing atmospheric pressure
This is the scientific height that a column of water may be lifted by atmospheric pressure in a true vacuum.
Theoretical Lift
For every 1,000 feet, atmospheric pressure decreases by approximately how many psi?
0.5 psi
What is the height to which any amount of water may be raised through a hard suction in to a pump?
Maximum Lift
In most circumstances, what is the maximum lift of a pump?
25 ft
Determine the maximum height ot which water will be lifted when the intake gauge reads 10 Hg.
11.3 ft
When determining maximum lift, what is the variable L in the maximum lift formula?
Height of lift in feet
What is the height a column of water may be lifted in sufficient quantity to provide a reliable fire flow?
Dependable Lift
How many feet is dependable lift usually considered to be?
14.7 feet
All fire department pumping apparatus are rated when drafting to a minimum of how many feet of lift through 20 feet of hard intake hose?
10 feet
All fire department pumping apparatus are rated when drafting with a minimum 10 feet through how many feet of hard intake hose?
20 feet
As the lift or friction loss in hard intake hose is increased, the water supply capability of the pump does what?
Decreases
Smaller natural water sources are more susceptible to what than large bodies of water?
Fluctuations in adequecy during droughts
Which of the following would not negatively affect a DPOs ability to access a natural static water source?
A boat ramp
If necessary a DPO can place a floating pump in a water source if they cannot access it with their apparatus. Floating pumps can develop and maintain a flow of up to what?
500 gpm
Although lesser depths may be suitable, how much clearance is generally considered the minimum amount for a barrel-type strainer?
24”
How does Irrigation system generally supply water?
Via open canals and portable pipes
What water system may require special threaded adapters or other tools to operate the system?
Agricultural Irrigation system
What is the costumary formula to determine the capacity of a round pool?
C=7.5x3.14xr²xD
This type of artificial water source typically contain many millions of gallons of water:
Ground reservoir
What are ground reservoirs similar to?
Pond or lake
Which type of water source FD may require owner to equip these with appropriate connections?
Private water storage tanks
What artificial water source may be stored at ground level or elevated?
Private water storage tanks
An underground water storage receptacle that is usually found in areas not serviced by hydrant system is?
Cistern
What is a method of gaining access to static water supplies during freezing weather?
Fill barrels with antifreeze
What can help to avoid problems with silt and debris?
Install dry hydrants
If an adequate draft can’t be established due to clogging, What can be done?
Back flush with tank water
Which device may draw water as shallow as 1 to 2 inches but will not provide required flow?
Low level strainer
What is the minimum depth for a barrel type strainer?
2 fet
Which type of deice may be used for water as shallow as 1 foot?
Floating strainers
The floating pumps can develop and maitain a flow up to how may gpms?
500gpm
When may be necessary to position portable pumps at a supply source?
Fire apparatus can’t make the require approach
A 1,000gpm pumper operating from draft has a PDP OF 120psi, a lift of 9 feet and a total intake friction loss of 6. What is the NPDP?
126psi
What is the customary formula for Pressure correction
PC=Lift+total intake hose friction loss/2.3
What is the concept where the height a column of water may be lifted in sufficient quantity to provide a reliable fire flow?
Dependable lift
Net pump discharge pressure formula is?
PDP + PC
According to theoretical lift what is the maximum height water can be lifted in a true vacuum?
33.9 feet
For every 1,000 feet of elevation gain, the atmospheric pressure decreases by approximately how much?
0.5 psi
Mximum lift is approximately how many feet?
25 feet
Which of the following is not a variable that affects maximum lift
Condition of the engine
What is the formula for determining maximum lift?
L = 1.13Hg
Dependable lift is usually considered to be how many feet?
14.7
What is dependable lift?
Height a column of water may be lifted in sufficient quantity to provide a reliable fire flow
All fire department pumping apparatus are rated when drafting a minimum lift of what?
10 feet
What is the pressure correction formula?
PC = Lift + Total intake hose friction loss / 2.3
What is the formula for Net Pump Discharge Pressure when at a draft?
NPDP(Draft) = PDP + PC
Which of the following is not a natural water supply source
Cistern
Floating pumps placed in an adequate water source can maintain a flow of up to how many GPM’s?
500
What depth can floating strainers still be utilized?
1 foot
What device can be used to draft water as shallow as 1 to 2 inches?
Low level strainer
What is the typical size range for a cistern?
10,000 to 100,000 gallons
What is the formula for finding the capacity of a rectangular pool?
C = 7.5 x L x W x D
What is the formula for finding the capacity of a round pool?
C = 7.5 x TT x r2 x D
Irrigation systems can flow in excess of how many gallons?
1,000 gpm
What determines maximum lift?
Ability of the pump to create a vacuum
Which of the following is not obtainable using a fire service pumper
Theoretical lift
Which of the following options is not considered to be a static water source?
On board water
How is “lift” measured in regards to static water sources?
The elevation difference between the surface of the static water supply and the center of the pump intake
What must be completed in order for an engine company to establish a draft?
air must be exhausted from the intake hose and fire pump
The pressure difference between the intake hose and normal atmospheric pressure is :
lower
According to the principles of theoretical lift for every 1000 feet in elevation above sea level, atmospheric pressure:
decreases by .5 psi
The maximum lift achievable by fire apparatus is approximately:
25 feet
The result of water being forced into the hose and pump during drafting operations is due to the pumps ability to:
create a partial vacuum
Every fire pump that is operating properly should have a dependable lift of at least:
14.7 feet
How is theoretical lift calculated?
atmospheric pressure X water pressure (per square foot kPa)
What is the minim depth needed to rate drafting capabilities of fire department apparatus?
3 feet
What is the minim depth a barrel strainer be submerged in order to operate?
2 feet
Which lift variant should the driver/operator be more concerned with?
dependable lift
Which of the following static water supply sources is the largest?
ground reservoir
A typical residential swimming pool typically:
supplies enough water for a fire in a single family dwelling
How is the capacity of a swimming pool determined?
7.5 X L X W X D
Which of the following water systems is supplied by using open canals and portable pipes?
agricultural irrigation systems
What is the total pump capacity If the lift used during drafting is increased to 15 feet?
70 percent
What is the total pump capacity If the lift used during drafting is increased to 20 feet?
60 percent
How is the vacuum reading measured on the intake gauge?
inches of mercury
Which of the following is the maximum theoretical lift at which pumpers cannot be expected to draft water?
33.9 feet
Agricultural systems can flow in excess of how many gpms?
1,000 gpm
What is the formula to determine the capacity of a round pool?
C = 7.5 x TT x r2 x D
What is the formula to determine the capacity of a rectangular pool?
C = 7.5 x L x W x D
What type of water storage receptacle is usually underground and can be supplied by rainwater runoff?
Cistern
Cisterns can vary in size, but typically range between how many gallons?
10,000 to 100,000 gallons
What do you do to back flush a fire pump?
Flow water in the opposite direction of normal flow
Which of the following is NOT an artifical static water supply source?
Water tower
When drafting from a natural water supply source, what is important for all intake hoses to have?
Strainer
What is the minimum depth of water that is needed all around a barrel strainer?
2 feet
Low level strainers can draw water from as shallow as what depth?
1 to 2 inches
Floating pumps placed in an adequate water source can maintain flows of up to how many gpms?
500 gpm
What is a major determining factor in the usability of a static water supply source?
Ability of apparatus to access and set up effective drafting operation
What is the pressure correction formula?
PC = Lift + Total intake hose friction loss / 2.3
When at draft net pump discharge pressure is the sum of what?
Pump discharge pressure and intake pressure correction
All fire department pumping apparatus are rated when drafting a minimum lift of what from the center of the pump?
10 feet
Every fire pump that is operating properly should have a dependable lift of at least what?
14.7 feet
What is the formula for determining maximum lift?
L = 1.13Hg
Maximum lift is approximately what?
25 feet
Pumpers can not expect to draft water that is located what distance below the pump?
33.9 feet
For every 1,000 feet of altitude atmospheric pressures decreases approximately how many psi?
0.5 psi
What is the difference in elevation between the surface of the static water supply and the center of the pump intake called?
Lift
What would decrease as altitude above sea level increases?
Theoretical lift
For every 1,000 feet of altitude, the atmospheric pressure decreases by approximately how much?
0.5 PSI
What is defined as the greatest height to which any amount of water may be raised through an intake hose to the pump called?
Maximum lift
In most circumstances, maximum lift is approxamately what?
25 feet
What is the height a column of water may be lifted in sufficient quantity to provide a reliable fire flow called?
Dependable lift
Every fire pump that is operating properly should have a dependable lift of at least what?
14.7 feet
All fire department pumping apparatus are rated when drafting with a minimum lift of what from the center of a pump intake to the surface of water through 20 feet of hard intake hose?
3 feet
Natural static water supply sources include everything except what?
Quarry
A major factor in determining the usability of a static water supply source is the ability of fire apparatus to what?
Set up an effective drafting operation at the site
Fire departments can ensure access at particular sites by doing what?
Using preincident planning
Floating pumps placed in an adequate water source can develop and maintain a flow of up to what?
500 GPM
Cleaning a fire pump or piping by flowing water through it in the opposite direction of normal flow is called what?
Back flushing
Floating strainers may be used for water as shallow as what?
12 inches
What type of hydrant are at predertimed static water supply sources and may help expedite drafting operations?
Dry
Driver/operators should take precautions so that intake strainers do not what?
Come in contact with the bottom of the water source
Firefighters should maintain situational awareness when preforming what?
Ice cutting operations
What is a water storage receptacle that is usually underground and may be supplied by a well or rainwater shutoff.
Cistern
Some pools may be difficult to use due to what?
Backyard location / Fence
Agricultural irrigation systems in some jurisdictions may flow in excess of what?
1,000 GPM
What is the difference in elevation between the surface of the static water supply and the center of the pump intake called?
Lift
What happens to the pressure in the hose and in the pump when drafting?
Drops lower that the atmosferic pressure
What affects the maximum height of the lift?
Amout of negative pressure
For every 1,000 feet of altitude, what psi does the atmospheric pressure decreases?
.5 psi
What is the theoretical lift when a true vacuum is achieved?
33.9 feet
This is defined as the greatest height to which any amount of water may be raised through an intake?
Maximum lift
Which is the approximate maximum lift in most cases?
25 feet
Which formula represents L=1.13 Hg?
Maximum lift
How deep is a strainer submerged in a water depth of at least 4 feet?
2 feet
What is dependable lift?
14.7 eet
Choose the most accurate about, all pumping apparatus are rated when drafting with a minimum of:
10’ of lift and 20’ of hard intake hose
What most account for all factors to contribute the amount of work required by a pump to produce a fire sttream?
Net pump discharge pressure
This formula, =lift+total intake hose friction loss/2.3 is used to detemine what?
Pressure correction
When evaluating a potential water supply source, what needs to be determined first?
Adequacy and accessibility
What should a driver be aware of about small natural sources compared to larger ones?
Periods of drought
How can fire departments ensure access at particular sites?
By using preincident planning
What do some jurisdictions use to allow the utilization of static water supplies that are located a modest distance?
Water eductors
What is the ideal position for a strainer when securing at the bottom of water source?
Horizontally to bottom of water source
What may restrict the volume of water to draft, but allow for better access to a natural supply source?
Dry hydrants
What makes difficult to keep a strainer submerged ?
Strong currents
What is the difference in elevation between the surface of the static water supply and the center of the pump intake?
Lift
According to theoretical lift, for every 1,000 feet of altitude, the atmospheric pressure decreases by approximately how much?
.5 psi
What is defined as the greatest height to which any amount of water may be raisd through an intake hose to the pump?
Maximum lift
Which of the following is not a variable affecting maximum lift?
Water depth
In most circumstances, what is the approximate maximum lift?
25 feet
What is the term for the height a column of water may be liftd in sufficient quantity to provide a reliable fire flow?
Dependable lift
What is the minimum lift for a fire department pumper when being rated when drafting?
10 feet
How much water needs to surround a strainer submerged in water when apparatus is being rated at draft?
2 feet
Lakes, ponds, streams, rivers and oceans are what kind of water source?
Natural static water supply
Floating pumps placed in an adequate water source can develop and maintain a flow of up to how much GPM?
500 GPM
What uncommon type of fire apparatus can be used to supply land based pumpers from fresh or salt water sources?
Fire boat
How much water is generally considered the minimum water all around barrel-type strainers?
2 feet
Floating strainers may be used for water as shallow as?
1 foot
Low-level strainers are most commonly used to draft from portable water tanks and my draw water as shallow as?
1 to 2 inches
What is the term describing cleaning a fire pump or piping by flowing water through it in the opposite direction of normal flow?
Back flushing
If an adequate draft cannot be established due to clogging at the strainer, what could be done to help dislodge the debris?
Back flushing
What is an underground water storage receptacle that is usually found in no hydrant areas and recieves thier water from a well or rainwater runoff?
Cistern
What is the formula to determine the capacity of a square/rectangular water source such as a pool?
7.5 x L x W x D
What is the formula to determine the capacity of a cylindrical container or round pool?
7.5 x 3.14 x R^2 x D
After factoring surrounding atmospheric pressure and friction loss in the intake hose, every fire pump that is operating properly should have a dependable lift of at least how much?
14.7 feet
Which of the following is the level at which pumpers cannot be expected to draft water?
33.9
Which of the following is closest to decribe maximum lfit in most situations?
25
What is dependable lift when friction and pressure loss are added to the suction hose?
14.7
Which of the following is NOT a problem when determining a static water supply?
Hard/Dry Ground
Pumpers may not be able to reach the water in all areas regarding drafting operations which of the following is a factor(s)?
All the above
Which of the following is the greatest height to which any amount of water may be raised through an intake hose to the pump?
Maximum Lift
If water does not rise to the level of the pump intake, drafting:
Will not be possible
In general, which of the following is the driver/operator Most concerned with?
Dependable Lift
Which of the following must account for all factors that contribute to the amount of work required by a pump to produce a fire stream?
Net pump discharge pressure
When evaluating a potential natural water source, what two factors must be considered first?
Adequacy and accessibility
Which of the following is most likely to cause a rollover of the fire apparatus?
Operating apparatus on unstable terrain
Which of the following is mostly likely to be placed at some natural water sites to create adequate water supply availability?
Dry Hydrants
Which of the following is the equation for determining the capacity of a square/rectangular pool?
7.5 x L x W x D
Which type of strainer requires 2 feet of water all around the strainer?
Barrel Strainer
Which of the following may be used when water is as shallow as 1 foot?
Floating strainer
An underground water storage receptable usually found in an area not serviced by a hydrant system is called?
A cistern
Which of the following equations determines the capacity of a round pool?
7.5 x 3.14 x r2 x D
Water is supplied through open cannels and portable pipes for:
Agricultural irrigation system
Connections similar to a dry hydrant for a quick fire department hook-ups may be available on?
Large indoor or outdoor swimming pools
Which of the following must be done after salt and dirty water is drawn into the pump?
Pump must be flushed with clean fresh water
is the difference in elevation between the surface of the static water supply and the center of the pump intake
Lift
The maximum height of the lift is affected by
the length of the intake hose
The maximum height of the lift is affected by
by the amount of negative pressure (vacuum) that the priming device can produce
The maximum height of the lift is affected by
the existing atmospheric pressure
Scientific height that a column of water may be lifted by atmospheric pressure in a true vacuum.
Theoretical lift
Can be calculated by determining the atmospheric pressure of an area and multiplying that number by the water’s pressure per square inch (kPa) while it is in the intake hose.
Theoretical lift
the greatest height to which any amount of water may be raised through an intake hose to the pump.
Maximum lift
Maximum Lift (Customary)
L= 1.13 Hg
Maximum Lift (Metric)
L= 0.01356 Hg
Height a column of water may be lifted in sufficient quantity to provide a reliable fire flow
Dependable lift
After factoring in the surrounding atmospheric pressure and friction loss in the intake hose, every fire pump that is operating properly should have a dependable lift of at least
14.7 feet
must account for all factors that contribute to the amount of work required by a pump to produce a fire stream
Net pump discharge pressure
PC =
Lift + Total Intake Hose Friction Loss/2.3
(Customary) Pressure Correction
PC =
Lift + Total Intake Hose Friction Loss/0.1
(Metric): Pressure Correction
NPDPDraft = PDP + PC
(Customary and Metric): Net Pump Discharge Pressure at Draft
When evaluating a potential water supply source, first determine its
adequacy and accessibility
Floating pumps placed in an adequate water source can develop and maintain a flow of up to
500 gpm
How many feet of water all around a barrel-type strainer is generally considered the minimum for that type of equipment?
2 ft
Floating strainers may be used for water as shallow as
1 ft
These devices may draw water as shallow as 1 to 2 inches (
Low-level strainers
Lift is the difference between?
The surface of the water and the center of the pump.
What happens to the inside of the pump and the intake hose during drafting?
Lower atmospheric pressure.
The theoretical scientific height that a Colum of water may be lifted by atmospheric pressure in a true vacuum at sea level is?
33.9’
For every 100 feet in elevation how much atmospheric pressure is lost?
0.5 PSI
In most circumstances, maximum lift is approximately how many feet?
25
The height to which any amount of water may be raised through a hard suction hose to a pump; determined by the ability of the pump to create a vacuum is called?
Maximum lift
Dependable lift is usually considered to be what?
14.7 feet
All fire department pumping apparatus are rated when drafting with a maximum height of?
10 feet
What is dependable lift considered to be?
14.7 feet
To clean a fire pump or piping by flowing water in the opposite direction is called?
Back flushing
A water storage receptacle usually underground supplied by rain or well is called?
Cistern
Why dose the strainer need to be 24” away from all surfaces?
Silt, air, water debris
This is installed in rural area’s in a static water supply. It should be inspected yearly.
Dry hydrant
When working in close proximity to water, firefighters must have what?
Personal floatation devises and safety line
Cisterns, private water storage, ground reservoirs, swimming pools are all examples of what?
Artificial static water supply’s
What is a concern with private water storage tanks?
There availability when needed
Drivers should be aware of what in regards to responsibility’s for dry hydrants maintained?
Policy’s
In the formula for square/rectangular capacity’s what does the 7.5 represent?
Gallons per cubic foot
When looking at depth of a pool, what is used for that number?
Average depth
When done drafting from a swimming pool, why must the pump and piping be flushed?
Chlorine residual
