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187 Cards in this Set

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  • Back
tests have indicated that apparatus may override the parking brake system at engine speeds as low as ___
1300 rpm
if it appears that a pump will have to furnish more than 50% of its rated capacity, it should be put in _____ position
parallel (volume)
NFPA standard, recommended practice for fire flow testing and marking of hydrants.
NFPA 291
hydrant flow by colors
class AA light blue
1500 gpm or greater
hydrant flow by colors
class A Green
1000-1499 gpm
hydrant flow by colors
class B Orange
500-999 gpm
hydrant flow by colors
class C Red
less than 500 gpm
when using 2.5 or 3" lines to supply pumper off hydrant pressure, lines should be no longer than ____
300ft
if the master intake gauge drops below ___ do not increase the throttle further
20 psi
percentage method equation for additional water available
percent drop=
(static-residual) (100)
---------------------------------
static
if psi drop is equal to or less than the first digit of static pressure multiplied by 1, ______additional lines may be added
three
if psi drop is equal to or less than the first digit of static pressure multiplied by 2, ______additional lines may be added
two
if psi drop is equal to or less than the first digit of static pressure multiplied by 3, ______additional lines may be added.
one
the max amount of vacuum that most pumps develop is approx. ___"of mercury
22"
the best indication of cavitation
lack of reacion on the pressure gauge to changes in the setting of throttle
maximum theoretical lift
33.8 ft
there should be ___ft of water over and preferrably all around the strainer
2ft
low level strainers can draft water down to a depth of ___
2"
all fire pumps are rated to pump their capacity at ____ft of lift
10
maximum lift considered reasonable for most pumpers is ___'
20ft
at 20 ft of lift, the amount of water that can be supplied is only about ___% of the rated capacity
60%
the transfer valve should be in _____position for priming
parallel (volume)
most priming pumps are intended to work best when the engine is set between ___ and ___ rpm
1000-1200
vacuum is measured from ______to ______
the surface of the water to the eye of the impeller
if a prime has not been achieved in ___ stop priming
30 seconds
priming typically requires ___to___
10-15 seconds
a ____gpm rated pumper should supply the fdc for every ____sprinklers flowing
1000gpm
50
when charging a system, multistage pumps should be set to_____
parallel (volume)
general rule of thumb is to discharge ____into an FDC
150 psi
add ___psi to the desired nozzle pressure for each floor above the standpipe connection
5 psi
elevation difference between static water supply source and pump.
lift
at sea level a pump could theoretically lift water ____
33.8 ft
every ____'of altitude atmospheric pressure drops ____
1000'
.5psi
the maximum height to which any amount of water can be raised through hard intake hose to the pump.
maximum lift
in most circumstances, maximum lift is no more than ___
25'
maximum lift calculation
L=1.13Hg
the height a column of water can be lifted in sufficient quantity to provide a reliable flow
Dependable lift
every pump in good repair should have a dependable lift of at least____'
14.7 ft
Pumping apparatus have their fire pumps rated when drafting from a lift of ___ through ____ of hard intake hose.
10ft, 20ft
the pump is only able to deliver __%of its capacity at a __' lift and ___% at a ___'lift
70% at 15'
60% at 20'
pressure correction formula
lift+total intake hose friction loss divided by 2.3
net pump discharge pressure at draft equation
NPDP draft= PDP+intake pressure correction
two primary types of static water supply sources firefighters can draft from
natural and man made
Natural static supply water sources include ___,___,____,____,_____
lakes, ponds, streams, rivers, and oceans
when evaluating a static supply source what two factors must be considered.
adequacy and accessibility
adequacy of small stream equation
Q=area x velocity(fpm) x 7.5
rule of thumb when evaluating pond and small lake capacity.
every 1 foot of depth for an area of 1 acre provides 1,000gpm fo 5 hours
a good rule of thumb for drafting with barrel type strainer is ...
a depth of 2 feet of water above and below
low level strainers are most commonly used to draft water from __________ and can draw water from down to ________
portable water tanks, 1 to 2 inch
floating strainers also allow safe drafting from water as shallow as ____
1 ft
underground water storage receptacles usually found in areas not serviced by hydrants
cisterns
cisterns vary in capacity from ____to____
10,000-100,000
________ are commonly found on large residential, industrial, and agricultural properties.
private water storage tanks
private water storage tanks range in size from ______to_______
several hundred gallons to many thousands of gallons.
man made impoundments that have the same characteristics of a pond or small lake
ground reservoirs
ground reservoirs typically contain ________of water
many millions of gallons
square/rectangular pool equation
capacity=L x W x D(depth) x 7.5
round pool equation
capacity= pie r squared x depth x 7.5
agriclutural irrigation systems may flow in excess of _____
1,000 gpm
irrigation water is generally transported by two methods:____ or _____
open canals and portable pipes
during a relay, the engine with the largest pump capacity should be where?
at the source
hose tenders usually cary ____ of LDH
a mile or more
intake pressure relief valves that are adjustable should be set within ___psi of the static pressure of the water sytem supplying the pumper or ___ psi above the discharge pressure of the previous pumper in the relay
10, 10
in the most basic sense, relay operation is based on two things: ________________________
amount of water required at the emergency
distance from emergency scene to the water source
all pumpers are rated to pump their maximum volume capacity at a net pump discharge pressure of ____psi at draft
150 psi
hose should not be pumped at pressures that exceed ____% of the annual service test pressure
90
Flowing a predetermined volume of water for the maximum distance that it can be pumped through a particula hose lay.
maximum distance relay method
pumpers are rated to flow ___% of their volume at ___psi and ___% of their volume at ____psi
70% at 200psi
50% at 250 psi
relay method that provides the maximum flow available from a particular relay setup by using a constant pressure in the system
constant pressure relay method
driver operators in a constant pressure relay should continue to adjust their PDP to ____psi
175
if the intake pressure drops below ___psi there is a danger of cavitation.
20 psi
the maximum capacity of a relay is determined by what
the capacity of the smallest pump and the smallest hoseline within the relay.
it is desirable to maintain an intake pressure of ___ to ___psi
20-30
if the attack pumper is equipped with an adjustable intake relief valve, set it between ___ an ___
50-75 psi
as long as the intake pressure does not drop below ____ or increase above _____ no action should be required
10 psi, 100psi
relay operations should be shut down from the ______ first
fire scene
pumpers used in a water shuttle operation are most commonly the ______ type
standard triple combination pumper
fill site pumpers should have a minimum pump capacity of ______
1000 gpm
NFPA 1901 requires tenders to be designed to be filled at a rate of at least ______
1000 gpm
specially designed fill site pumpers have capacities to _____ at a max of _____psi
1600 gpm, 80 psi
the majority of water tenders in use today carry from ____to____
1500-3000 gallons
single rear axle apparatus are limited to a max tank capacity of _____
1500 gallons
tenders with water tanks less than ____ and rapid unloading capabilities are the most effective in water shuttles
2500 gallons
some tenders with capacities in exess of _____ are used as dump sites instead of portable tanks
2500 gallons
tenders with ____ pumps are often called _______
750 gpm or larger, pumper-tenders
vacuum tenders are self filling from a static water supplt sourceat a rate up to ____ with lift capability up to _____
2000 gpm, 22 feet
vacuum tenders have discharge rates up to
1750 gpm
water tenders equipped with a pump must have a tank to pump line capable of supplying the pump with ___ until at least ____% of the tank is emptied
500gpm, 80%
water tender external fill connection should allow tank to be filled at a minimum rate of ______gpm
1000gpm
external fill connection should be equipped with a ____,____,&______
valve, strainer, and 30 degree elbow
vsalves that are ___or larger must be the slow closing design
3"
water tenders must have at least one large tank discharge that is capable of emptying ___% of the tank volume at an average rate of _____
90%, 1000gpm
because most water tender tanks are less than ___'tall, the back pressure created by a nearly full tank on a bottom fill inlet is less than ___
6', 3psi
gravity dumps usually employ ___" or larger round or square piping with a valve that extends to the exterior
8"
ISO gives extra credit ratings to jurisdictions that have automatic aid agreements for ________
water shuttle operations
when possible, select a fill site that is capable of supplying at least _____
1000 gpm
when a water supply group is established, the person in charge is known as ______
water supply group supervisor
if the IC initiates an operations section, then the _______reports to the operations section chief
water supply supervisor
when two or more shuttles are needed, a water supply branch may be established. The person in charge of this area is called _______
water supply branch director
in line water wiphons should be operated at _____ and provide ___to____ through a ___" pipe
150 psi, 700-800gpm, 4"
when a water tender pumps its tank directly into the attack pumper
direct pumping operations
a single portable tank works on fires requiring a flow rate of _____
less than 300 gpm
it is recommended that portable tanks be at least _____ larger than the tank on the apparatus carrying it.
500 gallons
jet siphons have an inlet for connection of ____ or larger hose
1 1/2"
flow rating for tender calculation
GPM= tank size-10%GPM divided by trip time
travel time formula
travel time in minutes=.65 + (1.7) (distance in miles)
handling time formula
handling time=fill site time +dump site time
tender flow rate calculation
water tank size in gallons -10% divided by travel time+ handling time
to recieve iso full credit, the first water tender must begin dumping wate within ___ of the first pumpers arrival and continue to be supplied with a minimum of ____ for _______
5 minutes
250 gpm
2 hours
mechanical foams must be ___ and ____ before they can be used
proportioned, aerated
foam proportioner
device that introduces foam concentrate into the water stream
hydrocarbon fuels such as ___________________________________ are petroleum based and float on water
crude oil, fuel oil, gasoline, benzene, naphtha, jet fuel, kerosene
polar solvent fuels such as ___________________________________ are flammable liquids and mix with water
alcohol, acetone, lacquer thinners, ketones, and esters
class b foam is effective on _____ fuels because it will float on the surface
hydrocarbon
what 3 ways does foam work?
seperates, cools, suppresses
most firefighting foam concentrates are intended to be mixed with ______ water
94 to 99.9%
the _____method of proportioning foam uses the pressure energy in the stream of water ti induct foam concentrate into the fire stream
induction
the ___ method of proportioning foam uses an external pump or head pressure to force foam into the stream
injection
foam storage\
___gallon pails
5
foam storage ___gallon barrels
55
foam storage
____gallon totes
275
foam concentrate tanks on municipal pumpers range from __to ___
20-200 gallons
foam pumpers and tenders may carry ___ gallons of foam concentrate ot more
8000 gallons
class A foam has been used since the ____
1940's
shelf life of class A foam can be as much as ___
20 years
fire attack and overhaul with standard fog nozzle--- ___% to ___% concentrate
.2-.5%
exposure protection with standard fog nozzle---___to___% concentrate
.5-1%
any application with air aspirating foam nozzle---___to___ concentrate
.3-.7%
any application with CAFS system---____to____concentrate
.2-.5%
the application rate of class A foam is the same as the ____________ of water
minimum critical flow rate
protein based foams have a normal shelf life of about ____
10 years
synthetic based foams will have a shelf life of generally _________
20-25 years
class B foams are mixed in prportions of ___to___
1 to 6%
class B foam is usually __to__ on hydrocarbons and ___to___ on polar solvents
1-3%
3-6%
MEDIUM EXPANSION FOAMS ARE TYPICALLY USED AT __,___ OR___ concentrations
1 1/2, 2, 3%
NFPA standard for low, medium, and high expansion foam.
NFPA 11
low expansion foam has an air/solution ratio up to ____
20:1
medium expansion foam has an air/solution ratio of ___to___ through hydraulically operated nozzle style delivery devices
20:1- 200:1
high expansion foam air/solution ratio is ___to___
200:1 to 1000:1
alcohol resistant fluoroprotein foam maintains its alcohol resistive properties for about ___
15 minutes
_______ is the most commonly used foam today
AFFF
on most polar solvents AFFF's are used at ___to____
3-6%
the pressure at the outlet of the eductor must not exceed ___to___% of the eductor inlet pressure
65-70%
foam solution concentrate is only correct at the rated inlet pressure of the inductor, usually ___to____
150-200 psi
the foam concentrate inlet to the eductor should not be more than___' above the surface of the foam concentrate
6'
self educting master stream nozzles are used when floes in excess of ___ are required
350 gpm
self educting master stream nozzles are available with flows up to _____gpm
14,000 gpm
the jet ratio controller allows the foam concentrate to be up to ____' away from the self educting master stream nozzle.
3000'
The JRC allows an elevation change up to ___'
50'
the JRC proportions the concentrate to ___%
66 1/2%
installed in line eductors are most commonly used to proportion class __ foams
B
variable flow rate direct injection systems provide foam concentrates from ___to___
0.1-3%
smoothbore nozzle foam application is limited to _______
class A CAFS
expansion ratios using fog nozzles are between ___and___
2:1 and 4:1
the only type of nozzle that can be used with protein and fluoroprotein foams
air aspirating foam nozzle
NFPA standard on foam chemicals for fire in class A fuels
NFPA 1150
when used for firefighting durable agents are normally applied at a ratio of _____
1:100
when used for line construction durable agents are normally applied at ___to____
1 1/2 to 2%
when used for structure protection, durable agents are normally applied at ___to___
2 to 3 %
NFPA _____ requires that driver operators be able to perform functional tests on foams systems
NFPA 1002
NFPA ____, _____, &_____ are used as a basis for most bid specs.
NFPA 1901, 1906, and 414
apparatus must accelerate to _____from a standing start within ____
35mph, 25 seconds
apparatus must achieve a minimum top speed of ___
50 mph
apparatus must come to a full stop from ___mph within ____feet
20 mph
35 ft
pumps are tested hydrostatically at ___ for ___
250 psi, 3 minutes
apparatus with less than 750 gpm are required to undergo the same tests with the exception of the __________
pumping engine overload test
NFPA standard for service tests of fire pump systems on fire apparatus
NFPA 1911
when using a static water supply source the water must be at least __ft deep and the strainer must be submerged at least __ft below the water. the surface of the water may be no more than __ft below the centerline of the pump intake, and ___ft of hard intake hose should be used for testing
4ft
2ft
10ft
20ft
air temp during testing should be between ___ and ___
0-100 degrees F
water being used for testing should be between ___and___
35 and 90 degree F
barometric pressure should be at least ______ corrected at sea level
29"Hg
__"drop in barometric pressure reduces a pumpers maximum possible static lift by about ___'
1"
1'
lifting ability drops by about ___ per ___ft of elevation increase
1foot
1,000 ft
gasoline engines have ___less efficiency per ____
3.5%
1000ft increase in altitude
pump service tests are conducted at ___,___,___,&____ net pump discharge pressure
150, 165, 200, & 250 psi
pressure correction formula
lift + intake hose friction loss divided by 2.3
NFPA 1911 requires that all gauges have been calibrated withing __days of testing
60
pump intake pressure gauge should have a range of ___to___vacuum and ___to___ for compound
30 in Hg to 0
30in Hg to 150 psi
pump discharge gauge should have a range from ___to___ psi
0-400 psi
pitot tube should have a range of ___to___
0-160 psi
vacuum test
no more than ___ of vacuum should be lost in ___ minutes
10 in
5 minutes
pumping test
___psi for __minutes
___psi for ___minutes delivering 70% capacity.
___psi for ___ minutes delivering 50% capacity
150 psi for 20 minutes
200 psi for 10 minutes
250 psi for 10 minutes
pressure control test
pump discharge pressure should rise no more than ___ when all gauges are closed
30 psi
any gauges that are off by more than ___ should be recalibrated, repaired, or replaced
10 psi
the flow measured from the nozzle and the flowmeter should not be more than ___% off
10
the fire pump must test to at least ___% of its original capabilities to remain in service with the same ratings
90%
foam solution refractivity test is used for ____and ____foams
protein and fluoroprotein