9 Master Stream Appliances Flashcards
During large fire incidents where should apparatus be located
Should be positioned so that radiant heat convected heat burning embers or structural collapse will not affect the safety of firefighters
When shouldn’t master stream appliances be placed in service defensively
While an offense of interior attack is being conducted
When our master stream appliances used
When handheld hose lines are ineffective they are used for fire attack exposure protection and back up
To be effective master streams require flows of what range
350 to 2000 gallons per minute
What are the three types of master stream appliances
Portable appliances, fixed appliances, elevated master streams
Portable master stream appliances are often referred to as
Deck guns or monitors
A portable master stream appliance moves were shifts from its position with might cause it
The nozzle is operating at too low of
Safety locks for nozzle angle must be manually released before the novel can you lower below what degree
35°
Which type of master stream appliance this placed on the ground and supplied with water from one or more hose line
A portable master stream appliance
Ariel pre-pipe water system on and Ariel with 110 feet or less in reach must be capable of flowing what
1000 gallons per minute at 100 psi nozzle pressure at full elevation and extension
Inlet size for an aerial waterway must be a minimum of what size
4 inch minimum inlet
The most common sizes of smooth for tips for master stream
1 3/8, 1 1/2, 1 3/4, 2 inch
Smooth bore master stream tips operate at what pressure
80 psi
An inch and three eights smooth for tip will flow how many gallons per minute
500 GPM
An inch and a half smooth for tip will follow how many GPM
600 GPM
The inch and three-quarter tip will flow how many GPM
800 GPM
The 2 inch tip will flow how many GPM
1000 GPM
Which size tip can be used on the master stream appliance when there is not enough water volume to feed the common sizes
Inch and a quarter tip
The inch and a quarter tip at 80 PSI on a master stream will flow how many GPM
400 GPM
Master stream spray nozzles operate at what PSI
100 psi
Master stream spraying all souls generally range what gallons per minute
300 to 1250 GPM
Water supply must be sufficient for the size small for tip selected. If not what can be done
Use a smaller size tip that suits the water supply
What is the friction loss in a master stream device
20 to 25 pounds
When using smaller supply lines what is the maximum suggested a length of hose to be used between pumper and master stream
100 feet
What are the four recommendations supply master streams
Locate a pumper any hydrant for suitable water support, use LDH for adequate number of small supply lines, use LDH or enough supply lines while relay pumping, maintain a 100 foot minimum with some small supply lines LDH will be longer
A great deal of extra pressure will do what to a solid stream of a master stream
Break up while leaving the nozzle making it an effective
Which stream nozzle is most effective for fire attack when using the master stream appliance
Solid stream nozzle, it will penetrate further into the building covering more area of fire
If distance is appropriate and the wind will not affect the stream which nozzle may be more effective for exposure protection with master streams
Spray nozzle
Spray nozzle Street streams lose its effectiveness if applied over distance true/false
True
If Spraying nozzles on master streams cannot be positioned close enough to the fire to be effective what should be done
Solid stream nozzle should be used
While directing the stream into a building how should the appliance be positioned for the most effectiveness
Should be moved horizontally back-and-forth across the fire area, And up-and-down so that reaches the full depth of the fire area
True/false master streams can be left unattended indefinitely
False, they cannot
Why might a master stream not seem to be having any affect on a fire
It could be positioned improperly
When the target is not visible through heavy smoke what signs are indications that the master stream is not adjusted properly or entering the building
The sound of water or stream hitting the building, heavy water run off
Steam and or white smoke is an indication that the fire, what sign indicates the fire is extinguished
Weinstein and or white smoke are no longer visible
How long should a master stream be used for
Only as long as fire is visible
Elevated streams must never be directed into natural openings such as skylights scuttles hatches vent holes or self ventilated holes because
You can force heat smoke and fire back down into the building and to lower floors
Master stream appliances require water flows from
350 to 2000 GPM
Elevated master stream appliances must be present with pre-piped waterways on which type of aerial device
Elevated platform
Minimum size small for tip for a master stream is
Inch and a quarter
Strong crosswinds will affect what type of master streams pattern or nozzle type
All of them
Master streams operating from the exterior to the interior of the building should be moved how
The stream should be moved both horizontally and vertically
Large caliber devices that are used primarily during defensive operations
Master stream appliances
A safety lock is provided on portable master streams to prevent lowering the nozzle below what degrees or angle
35° angle
