Flashcards in Pumping Apparatus Handbook 🚒 Deck (81)
NFPA 1901 standard for automotive fire apparatus contains the requirements of pumper design. The standard specifies a minimum pump capacity of at least 300 gallons. Pump capacities larger than 750 gpm increase in increments of _____ with most municipal fire departments operating pumpers of 2000 gpm or less
An inspection method which the driver or inspector starts at one point of the apparatus and continues in either a clockwise or counterclockwise direction inspecting the entire apparatus
Circle or walk around method
Apparatus that have been built by members of the fire department or local mechanics and custom built, overloaded vehicles are more likely to have design problems.
When laying supply hose into the fire scene, lay the hose to the _________ if at all possible.
Side of the street
The ______ of the overall water supply system receives the water from the pumping station and delivers it through the area served.
Operating at a pressure of 800 psi, _______ produce a stream with significant forward velocity, but relatively low volume of water of delivery. These nozzles are best suited for wildland fires and are not recommended for structural fire fighting due to their low flow of only 8 to 15 gpm.
High pressure fog nozzles
A simple guideline for the customary system of measurement is _______. This may be used to achieve the approximate solid stream nozzle reaction on the fire ground.
NR = Q/3
A simple guideline for the customary system of measurement is _______. This may be used to achieve the approximate fog stream nozzle reaction on the fire ground.
NR = Q/2
Generally a loss of 25 psi or greater is assumed when flowing the rated capacity. For this text, it is assumed that there is a 0 psi loss for flows less than 350 gpm and a ____ loss for each appliance (other than master stream devices) in a hose assembly when flowing 350 gpm or greater.
The _______ may be used for operations in which the friction loss can be determined for 3-,4-, or 5 in hose. Driver/operators must be aware the margin of difference when using the ______. Although sufficient for many fire ground calculations, the friction loss results will be 20 percent greater than when using the FL=CQ2L. However in hose lays using 3inch the difference may be as great as 50 psi.
The condensed Q formula
Fire pump manufactures have specific recommendations for when the transfer valve on their pumps should be operated in the volume or pressure positions. The process of switching between pressure and volume is sometimes referred to as ____.
Pumps powered by gasoline or Diesel engines independent of the vehicle drive engine are examples of auxiliary pumps. In some cases, these pumps may be part of a skid mount assembly that includes a small water tank, booster reel, and small diameter attack lines. With a pumping capacity of generally _______ or less, some jurisdictions mount these assemblies on pick up trucks.
Making a fire pump operational, commonly referred to as "_______" begins after the apparatus is properly positioned and the parking brake has been set.
"Putting the pump into gear"
Formula for determining maximum lift (customary)
L= 1.13 Hg
Formula for square/rectangle pools
C = 7.5xLxWxD
Formula for round pool capacity
When bulk storage of foam concentrate is required, some fire departments or industrial facilities may specify 275 gallon containers, called _____.
Is a type of in-line eductor that may be used to supply foam concentrate to a self-educting master streams. It allows the foam concentrate supply to be located as far as 3000 ft away from the self educting master stream nozzle.
JRC jet ratio controller
A ______ is performed to ensure that the pump and associated piping are capable of withstanding high pressure pumping demands. The pump body as well as the entire intake and discharge piping systems, with the exception of the tank fill and tank to pump lines on the tank side of the valves, are subjected to a minimum _______ pressure 500 psi for a minimum of 10 minutes.
Check the steering wheel for excess play that does not result in the actual movement of the vehicles front wheels. In general, _____ should be no more than approximately 10 degrees in either direction. On a 20-inch diameter steering the play may be about 2 inches in either direction.
Steering wheel play
When preparing to back the apparatus, the spotter should be positioned in the vision of the driver/operator, preferably in the left (drivers side) mirror, approximately _______ behind and slightly to the left of the apparatus.
8 to 10 feet
Is the distance that the pedal must be pushed before throwing out bearing actually contacts the clutch release fingers.
At speeds above ____ mph an emergency vehicle may outrun the effective range of its audible warning device. Sirens mounted on emergency vehicles operating at slower speeds project much out farther. In some instances increasing the speed of an apparatus by 20 mph can decrease the audible distance by____.
NFPA 1901 requires that all intakes or discharges that are 3 inches or greater be equipped with ______. this feature prevents the valve movement from open to closed in less than 3 seconds. This will minimize the risk of damage caused by water hammer when large volume of water are being moved.
Slow acting valve controls
A ________ ensures the quality of a foam solution after it has been created by a foam Proportioning system. This test is accurate for protein and fluoroprotein based foam solutions.
Foam solution refractory test
When the pump has been made operational priming the pump will begin the drafting operation. For two stage pumps, the transfer valve must be in the ________. A pump in series (pressure) position may trap air that will need to be removed.
Is the difference in elevation between the surface of the static water supply and the center of the pump intake.
Ideally, position the _______ so as to allow a view of both the water source and the water tender to be filled.
Fill site pumper
Newer apparatus may be equipped with electrical load management systems that are intended to prevent an overload of the vehicles electrical generation system. Overload may be a problem due to the large amount of electrical equipment added to modern fire apparatus. In general load management systems incorporate a load sequencer and load monitor into the same device.
The load sequencer turns on various lights at specified intervals so that the start up electrical load for all devices does not occur at the same time. The load monitor "watches" the system for any added electrical loads that threaten to overload the system. If an overload occurs the load monitor will shut down less important equipment in order to prevent this overload. This is referred to as ________.