State Exam Study Guide Flashcards
Preparing for exam
What is the GPM for a floating pump?
500GPM.
A Vernier is ___________ .
A graduating scale on a measuring instrument.
A spring pilot valve is a ________ .
Relief valve.
The angle from the bottom of the tires to the underside of the truck midway between the axels is called ____________ .
Ramp breakover angle.
“Lift” is ___________ .
The difference in elevation between the surface of the static water supply and the center of the pump intake.
For every 1000 feet of altitude, the atmospheric pressure decreases by approximately _______ .
0.5 psi
Theoretical Lift
Scientific height that a column of water my be lifted in a true vacuum. At sea level the height is 33.9 feet. *This is NOT attainable by a fire department pumper.
Maximum Lift
The greatest height a fire department pumper could actually lift water (depending on condition of pump, hoses, etc) - approximately 25 feet.
What is the gauge for measuring electric current flow being drawn from and provided to the vehicles battery?
Ammeter
What is the gauge for measuring existing voltage in an electrical system?
Voltmeter
All gauges used for service testing must be calibrated within how many days of testing?
60
Portable tank operations - once the first tender delivers its water _________________________ .
The dump site pumper begins to draft.
The end of a charged hoseline that is flowing water without a nozzle or valve to control the flow of water is called ___________ .
Open Butt
Intermediate partial bulkhead that reduces the surge effect in a partially loaded liquid tank is called ___________ .
Baffle
What type of foam is used in a CAF system?
Class A
Height a column of water may be lifted in sufficient quantity to provide a reliable fire flow is ___________ .
Dependable Lift - usually considered to be 14.7 feet
As lift is increased by 5 feet, pump may only be able to deliver about ________ % of its capacity.
70
As lift is increased by 10 feet, pump may only be able to deliver about _____ % of its capacity.
60
All fire department pumping apparatus are rated when drafting with a minimum lift of _______ feet from the center of a pump intake to the surface of the water through ______ feet of hard intake hose.
10, 20
Intake pressure correction takes into account Lift + _________ .
Total Intake Hose Friction Loss
Auxiliary brake systems include ____________ .
Electromagnetic retarder, Transmission output retarder, Engine compression brake, Exhaust brake
Two types of skids are _______________ .
Acceleration skid and locked wheel skid
Available water Percentage Method:
If the percent is 0-10 then 3x current flow; 11-15 is 2x, 16-25 is same amount that is currently flowing and over 25% drop, water might be available, but not as much as is currently flowing.
Electric Power Generators:
Inverter 1500, portable generators 5000, vehicle mounted generators 12,000 and rescue/specialty vehicle 50,000 watts.
Back pressure is:
Head pressure or elevation pressure.
Typical brush truck GPM?
500 gpm via 500 gal tank
The section of a centrifugal pump that gradually increases in size is called the __________.
Volute
How often should the brakes be thoroughly tested?
Annually
A better choice than using a pitot tube would be to use a ___________ .
Flowmeter
Minimum fill capacity for a tanker is:
1000 gpm
When would the driver manually stop the regen process?
When parked on top of flammable material.
Exhaust, Vacuum and Air are all types of:
Primers
Lift:
Theoretical 33.9, Maximum 25, Dependable 14.7
NFPA min gpm for a pumper is:
750 gpm
The DPF:
Removes particles causing black smoke from the exhaust.
Fog Master Stream psi:
100 gpm
Smooth Bore Master Stream psi:
80 gpm
Connect two portable water tanks with a:
jet siphon
Water hammer in a centrifugal pump can affect:
All the way back to the water mains
Stay ____ feet away from Railroad tracks when working.
30 feet
Engine speed test is performed under:
no load
Floating strainer minimum amount of water:
1 foot
Low Level drafting strainer minimum amount of water:
4 feet - 2 feet above and 2 feet below
What type of test is performed outside of the bay?
Functional Test
Tandem Pumping is:
Pumping from one pumper to another (discharge to intake) for the purpose of boosting pressure in the second pumper.
Dual Pumping is:
Supplying two attacking pumpers from one hydrant (intake to intake).
Relay Pumping is:
Pumping from one pumper to another over a long distance for the purpose of boosting volume in the second pumper.
Newtons Law:
An object in motion remains in motion until acted upon by an equal and opposite reaction (relating to water in a tank).
Nozzle reaction for fog tip:
0.0505 x Q x Sq root of NP
Nozzle reaction for solid tip:
1.57 x D2 x NP
Flow rate for solid tip:
29.7 x D2 x Sq root of NP
Formula for finding gal capacity of pool:
L x W x D x 7.5
PDP =
NP + TPL
