Water Supply
A typical AFD fire hydrant requires approximately this many turns to fully open.
What is 20 turns?
AFD calls for at least this many 3-inch supply lines to support a standpipe FDC.
What are two 3-inch lines?
At a natural drafting site, the pump intake should be within this distance of the water’s edge, with the water no more than this distance below the pump intake centerline.
What are 10 feet from the water and no more than 15 feet of lift?
These are the four tactical objectives AFD identifies when deciding where to initially position an aerial apparatus.
What are rescue, access to upper levels, ventilation, and elevated master streams?
These four AFD truck companies currently operate Rosenbauer aerial apparatus.
What are Trucks 1, 3, 5, and 12?
As an apparatus booster tank approaches full, the fill rate must be reduced below this flow.
What is 200 gpm?
AFD recommends placing an additional engine at the hydrant for relay pumping when a supply exceeds these distances for 3-inch and 5-inch hose.
What are 300 feet of 3-inch or 500 feet of 5-inch?
AFD recommends beginning a standard drafting evolution at approximately this engine speed and in this governor mode.
What are approximately 1,000 rpm in RPM Mode?
For roof operations, extend a straight-stick aerial at least this far above the roof; an aerial platform should normally be positioned this far above the roof edge.
What are 6 feet for the straight stick and 6 inches for the platform?
The Rosenbauer Cobra aerial has this aerial length.
What is 104 feet?
AFD specifies this maximum working pressure for 5-inch hose.
What is 185 psi?
The engine at the water source begins a relay operation at approximately this discharge pressure.
What is 100 psi?
During drafting, an AFD rotary-vane primer should not be operated longer than this amount of time.
What is 60 seconds?
AFD requires at least this much vertical and horizontal clearance between the aerial and power lines.
What is 10 feet?
At 0° elevation, the Rosenbauer Cobra has approximately this horizontal reach.
What is 98 feet?
To fully dress a hydrant for maximum flow, AFD specifies these three primary components.
What are a keystone, gated wye, and 5-inch supply line?
During relay pumping, the relay engines should operate in this governor mode, while the attack engine operates in this mode.
What are RPM Mode for the relay engines and Pressure Mode for the attack engine?
This drafting technique allows an Engineer to transition from onboard tank water to a static water source without interrupting water flow.
What is finesse drafting?
AFD defines the collapse zone for aerial positioning as this multiple of the structure’s height.
What is 1½ times the height of the structure?
The handbook lists these general platform working-load capacities for the Rosenbauer with the waterway wet and dry.
What are 500 pounds wet and 1,000 pounds dry?
For sprinkler operations, AFD requires this FDC pressure when the system has a fire pump and recommends this pressure when it does not.
What are 165 psi with a fire pump and 125 psi without a fire pump?
When directly supplying an aerial waterway, the Engineer does not add this factor to the friction-loss calculation because AFD’s 25-psi waterway allowance already accounts for it.
What is ladder elevation?
The Waterous Overheat Protection Manager begins releasing water when pump temperature reaches this temperature; a separate alarm activates at this higher temperature.
What are 140°F and 180°F?
Before initiating an elevated master stream, the operator must receive confirmation from IC of these three conditions.
What are: no viable persons remain in the structure; the specific target area has been identified; and the target area is clear of personnel, materials, and equipment?
The Rosenbauer aerial waterway fog nozzle is capable of this maximum flow.
What is 2,000 gpm?