Ifsta Flashcards
Batteries contain 2 items
Lead and sulfuric acid
Nfpa 1901 minimum requirements for a pumper
750 gpm 300 gal tank
What is brake fade
Overuse and overheat of brakes
Shutting Down Procedure Engine time idle
3 to 5 min
What are the angle of approach
Breakover
And angle of departure
AAO: tire touch ground to lowest part of front engine
Breakover: wheel to wheel to midbase of engine
AAD: rear wheel to back bumper
Adverse weather conditions it may take how many times greater to stop on snow and ice
3 to 15
What is overthrottling
More fuel injected than burned
Outrunning siren speed
50mph
When more than one emergency vehixle is reaponding along the same route keep a distance of
300 to 500
NFPA 1901 requires that vehicles with a GVWR of ______pounds or greater be equipped with an auxiliary braking system
36000
What is an exhaust brake
The least capable of the four auxiliary devices uses a valve to restrict the flow of the exhaust which creates back pressure that adds to the engines, inherit breaking ability
What are tyoes of auxiliary braking sustems
Exhaust brakes
Engine conpression
Electromagnetic retarders
Transmission retarders
Preposition lights to illuminate the area where the SPOTTER will stand approximately __ to __ feet behind the Apparatus
8 to 10
Inside outside method more than five stories
Aerial inside engine.outisde
Inside outside method less than five stories
Engine inside aerial outside
In tandem pumping operations, apparatus may be located up to blank feet apart
300
Relay pumping is used to increase the volume of water available but scene tandem pumping is increasing what
Water pressure
What is Level 1 staging
Two or more units
Awaiting orders, stage by hydrant
Level 2 Staging
Multiple alarm or mutual aid response. Officer is staging area manager
Fluid Pressure is perpendicular to any surface on which it acts
Fluid pressure at a point in fluid at rest is the same intensity in all directions
Pressure applied to a confined fluid is equal in All directions
Pressure of liquid in a vessel is proportional to it’s depth and density
Pressure of liquid at the bottom of the vessel is independent of the shape
Principles of a fluid
What is flow pressure
Water flowing from a discharge orifice is the flow pressure
What is critical velocity in friction loss
Practical limits to the velocity of flow of water. The friction will become so great it is agitated by resistance
3 means of moving water
Direct pumping
Gravity
Combination
3 distribution systems
Primary feeders
Secondary feeders
Distributors
Average daily consumption
Max daily consumption
Peak hourly consumption
Avergae water per day
Max water used in a day within a 3 year period
Max water in any 1 hour interval
Types of flowmeters
Paddle wheel
And Spring Probe
Condensed Q for 3 4 5
Qsquared
Qsquared over 5
Qsquared over 15
Types of Positive Displacement
Piston Pump
rotary Gear
Rotary Vane
Parts of the centrifugal pump
Eye
Impeller
Volute
Three main factors influence a centrifugal pump
Amount of water discharge
Speed at which impeller is turning
Incoming pressure
The piping system in the fire pump cell must be cable standing a hydrostatic test of blank
500 psi
According to NFPA 1901 pumpers with the capacity of blank GPM’s or less should have piping capable of flowing blank GPM
500
250
More than 500 gpm pump, the piping capacity in the system shall be rated for
500gpm
Automatic pressure control devices according to NFPA 1901 needs to operate within what to watch after the discharge pressure rises
3 to 10
It is generally recommended that the intake relief valves be set to open when the intake pressurizes more than blank PSI above the necessary operating pressure
10
What are the types of primers?
Positive displacement primers
Oil less primers
Vacuum primer
Exhaust primer
Air primer
What is the tachometer
Engine speed in RPMS
What are the two types of auxiliary cooling devices
Marine cooler
Immersion cooler
Types of Lift with respective heights per ifsta
Maximum lift 25
Theoretical lift 33.9
Dependable lift 14.7
3 ways foam works
Separate
Smother
Cools
Pail
Barrel
Totes
What are the gallons on each
5 gal
55 gal
275 gal
1500 gpm pumpers must be primed within _____ for priming system test
45 seconds
Parking brake must hold at what degrees
20 degrees
Aerial ladder: how high above railroad can you set the stick
25ft
3 types of stabilizers
Post type stabilizer
Box stabilizers
A frame
Priorities of rescue in Aerial
Most severely threatened
Largest Number or Group of People
Remainder of People in the Hazard Area
People in Exposed Area
How high does the driver spot the aerial above roof line
6 feet
