developing effective water supplies Flashcards
who will ensure that the water supplied to a ladder pipe is of sufficient volume and pressure?
The senior captain
who is responsible for identifying incidents that may require the development of an extensive water supply?
The Incident Commander
who will ensure their company develops effective water supplies on the fire ground?
captain
who is responsible for the proper development of water supplies on the fire ground?
engineer/operator
what can an average hydrant supply in 1000 ft of 4 in supply hose?
500 gpm
what should always be considered when doing a reverse lay?
always consider access and the space available
when is it permissible to use the rear intake on some pumpers?
in the event both large diameter side intakes have been used.
what is the max distance an engine company can be from a ladder truck when pumping into a ladder truck?
must be no more than 100 ft from the base of the ladder truck.
newer ladder trucks are capable of flowing how many gpm’s?
1500 gpm
all e one ladder trucks and towers require how much psi at the base?
200 psi
how should trucks that can flow 1500 gpm be supplied?
these trucks need to be supplied by dual 4 in lines, using Siamese from the ladder truck.
what are most pressure relief valves set at?
125 psi
how should all relays start?
all relays should start with the engine at the hydrant developing no more than 100 psi and relaying to the next engine.
what should be done on pumpers during high pressure pumping>
during high pressure pumping all dump valves should be capped.
who is responsible for the selection of the appropriate handline, taking into consideration the potential fire load and visible conditions.
the engine captain.
who is responsible for knowing the correct nozzle pressure,,GPM, setting, and friction loss for the lines in use.
the engineer operator.
what pressure does the task force tips mid-matic series operate at?
75 psi
what pressure does the akron mid range nozzle operate at?
100 psi
what pressure does the vindicator heavy attack nozzle operate at?
50 psi, through 1 3/4” hose
solid master streams are usually operated at what psi?
80psi
fog master streams are usually operated at what psi?
100 psi
how much psi should be added to master streams flowing 350 gpm or greater?
25 psi
after laying supply lines what should the engineer operator do?
correctly spot the apparatus
disconnect the supply hose from the hose bed and attach it tot he 4 in discharges using a 4 in double female
connect the 6 in supply hose from the hrdrant to the side pump intake.
turn hydrant on and open intake valve
open the appropriate discharge valves and supply water to the attack or intermediate pumper
engage pump and develop correct pressure to fireground or apparatus
what is the principal behind a relay
to move the pressure and capacity of the hydrant to the fire scene
