1 Flashcards
DSUL Dump Site Unit Leader
The officer in charge from the third engine will be tasked as the dump site unit leader and will manage the water supply operations until the arrival of an additional command officer or arrival of the command officer from the tanker task force. DSUL reports to water supply group supervisor once established
What is a direct fill scenario?
A nursing operation that provides immediate water to the fireground eliminating the need for portable dump tanks.
FSUL fill sit unit leader
The officer in charge from the fifth engine supervises the activities at the fill site. Fill site reports to the WSGS and is responsible for setting up and maintaining the operations at the fill site.
What is LDH hose?
Supply hose of 4 inch or greater
What is a no hydrant area?
Includes all known locations where hydrants are more than 2000 ft from a given structure.
What is a relay operation?
Generally this procedure uses 3 or fewer engines to supply the attack engine(s) directly from the water source through a supply line that should not exceed 3000 ft from the incident
What is the NOVA recommended for a tanker minimum pump and tank size?
1000gpm pump
2000 gallon water tank
What is the tanker task force consist of?
3 tankers
One engine
One command officer
WSGS water supply group supervisor
The third engine officer working as the DSUL, will be initially responsible for the duties of the WSGS until relieved. The second arriving command officer should be assigned WSGS
What must the DSUL calculate and tell the WSGS?
Calculate the turnaround time and GPM per unit in shuttle and provide total GPM to WSGS
What PPE should personnel at the dump site wear?
Appropriate PPE, including Traffic vest and firefighting helmets
What mode do fill site engines with electronic governor controls need to be in when drafting?
Draft and fill in RPM mode pressure mode can cause damage to the tanks. If in pressure mode and not generating pressure the pump will think it’s cavitating causing the built in safety mechanism to shut down the pump after a short period of time.
Within how many feet of an open water source must personnel wear PFDs?
If working within 10 feet of an open water source
What may the WSGS have to consider for incidents?
The need for more than one fill sit based on this critical information, so it is important to monitor, collect, and transmit this mission-critical information
What is the formula for tanker flow calculations?
Tanker flow= capacity-20% / Round Trip Time
How many full sites should the Fill site engine set up?
Establish two fill stations positioned sufficiently apart to ease of vehicle movement. Tankers have priority and should have a designated fill position.
For a direct fill nursing operation what should the first engine do if the dump site is less than 200’
Lay in or hand jack hose back to the dump site
For a direct fill nursing operation what should the first tanker do?
If less than 200’ position out of the way at dump site and serve as direct fill tanker. If 200-1000’ proceed with the 1st engine to incident scene and supply water to 1st engine. If more than 1000’ layout supply line from predetermined location to 1st engine. First tanker should drop Siamese at dump site before proceeding to first engine
What should additional apparatus do on a rural water supply house fire incident?
Report to the incident scene dump anticipated equipment/ personnel and move the vehicle to a staging area out of the way of travel. Engines may be directed to become apart of the water shuttle
What should the first tanker do if the first engine doesn’t drop a Siamese?
The tanker should drop one
With proper preplanning relay operations are feasible up to what distance?
Relay operations with 4 inch hose are feasible at distances over one mile
What resources should be assigned to a fire boat to assist them with setup for water supply operations?
An engine company
Fire boats can be used for?
Can be used as drafting unit to relay, supplement an established water supply, or supply a fill site for a shuttle operation
Where are dry hydrants typically installed?
Ponds, lakes, or streams, but could also be found attached to swimming pools.
How often should dry hydrants be back flushed and tested?
Every 6 months
Where are storage tanks normally found?
Underground and set up for drafting operations.
Due to tank design it is impossible to draft all water from the system
Systems should be checked every 6 months for proper operation
What are the typical sizes of dump tanks?
1500 gal- 10’3 x10’3x30”
2100 gal- 11’3”x11’3x30”
2500 gal- 12’3x12’3x30”
3000 gal- 13’3x13’3x30”
What is the max flow of a low level suction strainer? And how low of a water level does it work for?
Max flow for a low level strainer is 750 GPM
Allows engine company drafting to make the best use of all available water in a dump tank down to a water level of approximately 2 inches
What piece of equipment allows engines the ability to get water from dump tanks without having to draft?
Low-profile jet siphon strainer
How does a low-profile jet siphon strainer work? And as a general rule of thumb what is its minimum flow
By charging 1 3/4” hose line a continuous is established. This device can be used to transfer water from one dump tank to another. Minimum flow of approximately 500 GPM but varies by manufacturer.
How much water does a jet siphon move up to?
800 GPM between tanks as needed
How does an automatic air primer work?
When placed in automatic mode, this device will allow for the primer to automatically begin priming whenever the discharge pressure drops below 20 PSI
What is the rule of thumb for deciding between relay vs tanker shuttle
If the distance to the water source is greater than a 3- pumper relay, a tanker shuttle is likely a better choice
What is the max distance between engines in a relay?
Maximum 1000’ between engines
What should clappered siamese starting pressure be?
70 psi
What distance is referred to as a short lay?
200’ or less
What distance is considered a long driveway?
200’-1000’
At what minimum rate and psi should tankers be filled at?
1000 gpm @100 psi one at a time
