Often referred to as “the staple of American fire service,” smooth bore nozzles produce the greatest reach/gpm combination compared to other nozzle types. Smooth bore nozzles also use the
lowest engine pump pressures
, allowing for maximum reach.
What is the difference between a smooth bore nozzle and a fog nozzle?
The difference between the solid stream and the straight stream goes beyond the solid vs.
hollow stream
. The water droplets produced by the straight stream of the fog nozzle are smaller than those produced by the solid stream of the smooth bore nozzle. … The nozzle tip of the one-piece nozzle cannot be removed.
What do you pump a smooth bore nozzle at?
The operating pressure of the smooth bore is a range from 40 to 60 pounds per square inch (psi), with
50 psi as
optimal.
Why does FDNY use smooth bore nozzles?
Why does FDNY use smooth bore nozzles? The
smooth-bore will also maintain the same water pattern to reach the seat of the fire
, keeping the pattern compact and getting large amounts of water at the seat of the fire.
What is the advantage of a fog stream nozzle?
Fog nozzles play an important part in firefighting tactics due to their versatility. The wide variety of fog nozzle manufacturers allows them to accommodate different sizes of fire hose—most often attack hand line—and streams and are
capable in both fire protection and attack
.
Which nozzle type has the highest flow rate?
Typically,
the smooth-bore nozzle
produces the greatest reach/gpm combination of all nozzles while at the same time using the lowest engine pump pressures.
Which is a characteristic of smooth bore nozzles?
Smooth bore nozzles also use
the lowest engine pump pressures, allowing for maximum reach
. Smooth bore nozzles are often referred to as solid bore nozzles because they produce a solid stream to provide maximum reach and penetration to the seat of the fire.
What is a constant Gallonage nozzle?
The constant gallonage nozzle is the simplest of these nozzles because it
has a fixed orifice that is rated for a predetermined gallons per minute (gpm) at a standard nozzle pressure
. This means that its rated pounds per square inch (psi) will produce a predetermined volume of water.
What is a Playpipe nozzle?
“Playpipe” is one of those terms that confound the experts and simply means
a common tool firefighters and inspectors use to control water flows
. … The shape, size, and construction of each nozzle or orifice significantly influence the friction and turbulence that it creates, hence hindering the passage of water flow.
What is an automatic fog nozzle?
Conventional fog nozzles have a fixed or selectable gpm setting. … With an automatic nozzle, the
discharge orifice continually adjusts depending on the flow to the nozzle
. This sets the flow being supplied to the proper nozzle pressure and correct velocity for maximum extinguishing capability.
What nozzles does FDNY use?
Response: The predominate nozzle used by FDNY engine companies is
a smooth- bore controlling nozzle with stacked outer stream tips
ranging in size from 1 1/8-inch down to 1 5/16-inch. Some combination fog straight-stream nozzles are used, however, generally not on the initial structural fire attack line.
Which type of nozzle can be adjusted resulting in different patterns?
Foam concentrates generate bubbles through chemical reaction when concentrates are mixed with water. Which type of nozzle can be adjusted, resulting in different patterns? …
Rotary control valves
control both the water flow and the discharge pattern of a fire stream.
What is a constant flow nozzle?
Nozzle GPM. Specify Thread. These constant flow nozzles provide
a continuously adjustable stream
, from a full fog to a straight stream and twist shut off. Constant flow nozzles are constructed of anodized aluminum and brass with stainless fasteners. Constant flow nozzles have heavy duty neoprene bumpers.
Can fog put out a fire?
fog on fire, it will undoubtedly become the leading method in
combating forest fires
when and where water can be used. water from 212 degrees Fahrenheit into steam requires 8,000 BTUt s.
How do you calculate nozzle reaction?
R = ( 2 ρ Q
2
p
1
+ ρ
2
Q
4
/ A
1
2
)
0.5
. This equation shows that for a fully open bale valve and a hose area much larger than the nozzle area, the reaction is proportional to the flow rate times the square root of pressure.
What is one advantage of the Minuteman load?
One final advantage with the minute-man load is
the ability to easily extend a line by shouldering the nozzle bundle, disconnecting it from the supply bundle
, then adding it to the end of your line for an additional 100-feet of attack line.
