IFSTA Book Flashcards
5 things that make a quint a quint
Fire pump, water tank, hose, aerial device, ground ladders
Steering wheel play should be no more than _____
10 degrees in either direction
DPF
Diesel Particulate Filter
What does DPF do?
Traps much of the particulate matter in exhaust emissions
DEF
Diesel Exhaust Fluid
What does DEF do?
It is injected into the gas in order to reduce the Nitrogen Oxide emissions from diesel engines
HEST
High Exhaust System Temperature
Inside/Outside method of apparatus placement
Aerial positioned outside pumper if building is less than 5 stories tall. Aerial positioned inside the pumper if building is more than 5 stories tall.
Water expands _______ when converted to steam.
1700 times.
PIV
Post Indicator Valve
What does a PIV do?
Controls underground water mains found on the supply main of installed fire protection systems.
OS and Y Valve
Outside Screw & Yoke Valve
What does an OS and Y valve do?
Control valve for a sprinkler system
Equation for flow from a solid stream nozzle
GPM = 29.7 x D squared x square root of NP
Equation for nozzle reaction for solid stream nozzle
NR = 1.57 x D squared x NP
Equation for nozzle reaction for fog stream nozzle
NR = 0.0505 x Q x square root of NP
Field equation for nozzle reaction from a solid stream nozzle
NR = Q/3
Field equation for nozzle reaction from a fog stream nozzle
NR = Q/2
Friction loss in an appliance where flow is less than ______ is generally considered to be insignificant
350 gpm
Condensed Q formula for 3” hose
Q squared
Condensed Q formula for 4” hose
Q squared / 5
Condensed Q formula for 5” hose
Q squared / 15
In a centrifugal pump, where is velocity energy converted into pressure?
Volute
Tank fill line requirements
Must be 1” or larger in diameter for tanks less than 1000 gallons
What does the tachometer display?
Engine speed in revolutions per minute
What does the voltmeter display?
Battery condition
What does the ammeter display?
Status of the vehicle’s alternator and charging system
If 0-10 percent descrease of pumper intake pressure, how much additional water is available?
3 times
If 11-15 percent descrease of pumper intake pressure, how much additional water is available?
2 times
If 16-25 percent descrease of pumper intake pressure, how much additional water is available?
Same amount as being delivered
If 25 percent descrease of pumper intake pressure, how much additional water is available?
More water might be available, but not as much as is being delivered
All fire pumps meeting NFPA and UL requirements are rated to pump their capacity at ______
10 feet
A pumper in good working order can lift water a maximum of ______
25 feet
If no information is available, the general guideline is to discharge ______ into the FDC
150 psi
Equation for number of pumpers needed in a relay pumping operation
Pumpers = Relay distance / max distance between pumpers + 1
Equation for water shuttle flow rate
Flow = 0.9 x Tank Size / Trip Time
What is the hydrostatic test pressure of the pump body, intake, and discharge piping system?
500 psi for 10 minutes
NFPA Standard for Automotive Fire Apparatus
NFPA 1901
NFPA Standard for Fire Apparatus Driver/Operator Professional Qualification
NFPA 1002
NFPA Standard for Emergency Vehicle Technician Professional Qualifications
NFPA 1071
NFPA Standard for the Inspection, Maintenance, Testing, and Retirement of In-Service Automotive Fire Apparatus
NFPA 1911
NFPA Standard for Fire Service Vehicle Operations Training Program
NFPA 1451
Maximum distance between pumpers to be considered tandem pumping
300 feet
What is the “squaring the lines” method used for?
To determine hydrant water available
What is the “GPM flowing” method used for?
Friction loss calculations
Preferred engine speed for priming.
1000-1200 rpm
Positive displacement primers
Used by most modern pumpers. Small versions of the rotary vane and rotary gear type are commonly used.
Exhaust primers
Found on older apparatus, uses vehicle exhaust gases, requires lots of maintenance
Vacuum primers
Used by gasoline-driven engines, so these are rare
Air primers
Gaining popularity, uses the air compressor to create a venturi effect that primes the pump
Per NFPA 1901 tenders must fill at a rate of
1000 gpm
Minimum rating for a tender pump
750 gpm
Conservative aspect of 10-15-25 rule
0-10: 3x amount, 11-15: 2x amount, 16-25: 1x amount
