Term
| You will notice that you will be squaring a lot of half numbers, like 2.5, 3.5, 7.5 etc... To help simplify this process do this: |
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Definition
1. Identify the two whole numbers that the half number is between. (2.5 is between 2 and 3)
2. Multiply those numbers (2x3=6)
3. add .25 to that total (6+.25=6.25)
That is your answer, EVERY time. |
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Term
| A device, other than a hand-held nozzle, where the direction of water flow is interrupted or changed. |
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Definition
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Term
| Any pumper that is supplying water directly to attack lines. |
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Definition
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Term
| The same as "head pressure." Pressure generated by the weight of a column of water. This pressure is exerted at 0.434psi per foot of elevation. On the fireground, this is rounded to 0.5. |
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Definition
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Term
| The quantity of water issuing from an opening and is expressed in GPM. |
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Definition
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Term
| Any pumper that is supplying water from a source such as a hydrant or pond, to an attack engine. |
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Definition
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Term
| The forward velocity pressure of water issuing from a discharge opening. Normally measured by a pitot gauge. |
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Definition
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Term
| The loss in energy (pressure) due to friction. This results from the turbulence in the water and the water molecules rubbing on the interior surfaces of the hose and appliance. |
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Definition
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Term
| A master stream device that is attached to the rungs or rails of an aerial ladder. This may be pre-piped and permanently mounted or they may be appliances that must be attached to the aerial when needed. |
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Definition
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Term
| Any fire stream that is too large to be controlled without mechanical aid. It delivers more than 350gpm. They may be fixed, or portable. |
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Definition
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Term
| Pressure on a water system during regular domestic consumption. |
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Definition
| Normal operating pressure. |
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Term
| The flow pressure of water as it leaves a nozzle. |
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Definition
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Term
| The backward force created by a stream of water as it is discharged from a nozzle. |
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Definition
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Term
| The pressure REMAINING in a water system when water is flowing. |
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Definition
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Term
| An appliance that combines two or more hose lines into one. |
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Definition
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Term
| The pressure exerted by water when at rest |
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Definition
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Term
| A concussion effect of a moving stream of water against the sides and ends of pipes, pumps, or hose lines when its movement is suddenly stopped. |
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Definition
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Term
| An appliance that breaks one hose line into two or more hose lines |
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Definition
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Term
| One cubic foot of water contains X cubic inches. |
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Definition
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Term
| One cubic foot contains X gallons. |
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Definition
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Term
| One gallon of water contains X cubic inches |
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Definition
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Term
| One cubic foot of fresh water weights X-lbs. |
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Definition
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Term
| One gallon of fresh water weighs X lbs. |
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Definition
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Term
| A column of water one foot high exerts a pressure of X PSI at its base. |
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Definition
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Term
| A column of water X ft high exerts a pressure of 1 PSI at its base. |
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Definition
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Term
| One inch of mercury equals X inches of water in the pressure it exerts downward. For drafting purposes, use Y inch of mercury to indicate Z foot of lift. |
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Definition
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Term
| One length (50ft) of 1.75" hose contains X gallons of water |
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Definition
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Term
| One length (50ft) of 2.5" hose contains X gallons |
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Definition
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Term
| One length (50ft) of 3" hose contains X gallons of water |
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Definition
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Term
| One length (100ft) of 4" contains about X gallons of water |
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Definition
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Term
| A small stream is X gpm or less |
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Definition
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Term
| A 1.75" hand line ranges from X to Y gpm |
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Definition
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Term
| A 2.5" handline flows up to X gpm |
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Definition
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Term
| A master stream is considered to be X gpm |
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Definition
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Term
| Nozzle pressure for hand lines with smooth bore nozzles is X psi. The pressure can be increased to Y psi to achieve higher flow. |
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Definition
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Term
| Nozzle pressure for master streams with smooth bore nozles is X psi, but can be increased to Y psi to achieve higher flow rates. |
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Definition
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Term
| Nozzle pressure for fog nozzles is X psi unless otherwise indicated |
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Definition
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Term
| Low-pressure fog nozzles are designed for X psi nozzle pressure. |
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Definition
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Term
| Fluid pressure is _______ to any surface on which it rests |
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Definition
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Term
| Fluid pressure at a point in a fluid at rest is of the _____ intensity in all directions. |
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Definition
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Term
| Pressure applies to a confined fluid from an outside source is transmitted_______ |
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Definition
| Equally in all directions |
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Term
| The downward pressure of a liquid in an open vessel is proportional to its _____ and ______. |
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Definition
| Depth and density of liquid. |
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Term
| The downward pressure of a liquid on the bottom of a vessel is _______ of the shape of the vessel itself. |
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Definition
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Term
| Formula for volume of a rectangular or square shaped container? |
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Definition
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Term
| To determine the volume of a cylinder, the formula is: |
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Definition
0.7854 x D2 (diameter squared) x Heigth
-OR-
0.7854 x D2 (diameter squared) x Length |
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Term
| Determining the flow from a smooth bore nozzle can be computed by using a formula for GPM when the nozzle pressure is known. This formula is: |
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Definition
GPM=(29.7D2) x SqRt(NP)
To simplify, use 30=29.7 |
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Term
| A 15/16" @ 50psi = ___gpm |
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Definition
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Term
| A 15/16" smooth bore tip@ 65psi = ___gpm |
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Definition
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Term
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Definition
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Term
| A 1 1/8" @50 psi = ___GPM |
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Definition
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Term
| 1 1/8" smooth bore tip @50 psi = ___GPM |
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Definition
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Term
| 1 1/4" smooth bore tip @50 psi = ___GPM |
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Definition
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Term
| 1 1/4" smooth bore tip @80 psi = ___GPM |
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Definition
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Term
| 1 3/8" smooth bore tip @80 psi = ___GPM |
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Definition
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Term
| 1 1/2" smooth bore tip @80 psi = ___GPM |
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Definition
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Term
| 1 3/4" smooth bore tip @80 psi = ___GPM |
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Definition
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Term
| 2" smooth bore tip @80 psi = ___GPM |
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Definition
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Term
| The Akron Turbojet nozzle standard settings are: |
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Definition
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Term
| The Elkhart "Chief" nozzle standard settings are: |
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Definition
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Term
| All things being equal, friction loss of vary ______ with the length of hose. |
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Definition
Directly.
IE:/ If there is 20lb of FL in 100' of hose, there wil be 40lb of FL in 200' of hose. |
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Term
| For the same hose, the friction loss will increase __________ as the quantity of water flowing increases. |
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Definition
Exponentially.
IE: Increasing water flow will not raise FL the same amount. |
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Term
| If the quantity of water flowing in a hose is doubled, the friction loss will be _________. |
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Definition
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Term
| If the quantitiy of hose is tripled, the friction loss will be _______. |
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Definition
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Term
| Assume a hose line is delivering 100gpm via 200' of hose and the FL=20lb. If the flow rate increased to 200gpm, the FL=____. |
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Definition
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Term
| For the same discharge, friction loss varies inversely as the _____ power of the diameter of the hose. |
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Definition
Fifth.
IE: (Hose #1/Hose#2) to the 5th power. |
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Term
| The _____ blank of water through a hoseline, not ________, causes friction loss. |
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Definition
VELOCITY = FL
Not pressure! |
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Term
| Friction loss coefficient of 1.75" |
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Definition
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Term
| Friction loss coefficient of 2" |
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Definition
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Term
| Friction loss coefficient of 2.5" |
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Definition
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Term
| Friction loss coefficient of 3" |
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Definition
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Term
| Friction loss coefficient of 3.5" |
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Definition
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Term
| Friction loss coefficient of 4" |
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Definition
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Term
| The standard formula for calculating friction loss is? |
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Definition
FL= C x Q(Q) per 100' where "C" = coefficient.
(Coeffeicient times Q-squared per 100' of hose) |
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Term
What is the friction loss for small appliances such as gated wyes and siameses for flows less than 350gpm?.
For flows greater than 350gpm? |
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Definition
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Term
| Ladder pipe friction loss is? |
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Definition
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Term
| Frictio loss for deluge guns, unless otherwise indicated? |
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Definition
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Term
| When two lines are of equal size and diameter, the procedure to determine friction loss is... |
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Definition
| To divide the total flow in half and figure the friction loss for one line. Pump both lines at that PDP. |
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Term
| When three lines are of equal diameter and length, the procedure to determine friction loss is... |
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Definition
| To divide the total flow by three and figure the friction loss for one line. Pump all three at that PDP |
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Term
| What is the friction loss of small appliances such as gates wyes and siameses. |
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Definition
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Term
| For flows greater than 350gpm in small appliances such as gates wyes and siameses, you should add ___psi to the friction loss for a total of ___psi FL |
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Definition
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Term
| What is the friction loss for ladder pipes? |
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Definition
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Term
| What is the friction loss for deluge guns, unless otherwise indicated? |
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Definition
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Term
| A column of water one foot high and one inch square exerts a pressure of ____psi at its base. |
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Definition
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Term
| For our purposes in fireground operations, round off 0.434psi to ___psi for every 10feet above/below the pumper. |
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Definition
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Term
| What is the maximum safe PDP? |
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Definition
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Term
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Definition
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Term
| Residual pressure of no less than ___psi is desired. |
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Definition
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Term
| For supply engines, the PDP formula is slightly modified to reflec the fact that in this case there is no nozzle pressure to use. What is this formula? |
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Definition
| PDP = RP + FL +/- EL + AL |
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Term
| Major infuego. You pull onscene of a highrise on fuego. What should you, as a pump operator, do "immediately upon arrival on the scene and without orders?" (In the City & County of Fairfax!) |
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Definition
| Start water into the standpipe system immediately upon arrival on the scene and without orders to 150psi pdp. Once water is flowing, refer to the High-Rise Standpipe Ops Chart. |
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Term
| Major infuego. You pull onscene of a highrise on fuego. What should you, as a pump operator, do "immediately upon arrival on the scene and without orders?" (In Alexandria) |
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Definition
| Start water into a standpipe system immediately upon arrival on the scene and without orders to 170psi PDP. |
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Term
| Major infuego. You pull onscene of a highrise on fuego. What should you, as a pump operator, do "immediately upon arrival on the scene and without orders?" (In Arlington) |
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Definition
| Start water into a standpipe system immediately upon arrival on the scene and without orders to 150psi PDP. |
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Term
| Standard starting PDP for sprinkler systems is ___psi? |
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Definition
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Term
| Starting PDP for combination systems is ___psi. In Alexandria it is ___psi. |
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Definition
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Term
| are defined as 2 or more engines that are in line between the water source and the nozzle. |
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Definition
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Term
| The starting PDP for a relay operation is ___psi |
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Definition
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Term
| Ground or apparatus mounted master streams are usually only effective to about the ____ floor. |
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Definition
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Term
| Aerial units should be provided with their own supply engine with no more than ___ft between the engine and truck. |
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Definition
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Term
| If a hydrant is not available, such that an engine could be within 250ft of an aerial that is flowing water.......What should be done about it? |
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Definition
| Another engine should come in and relay to the unit supplying the truck. |
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Term
| What is the supply line that should be used to supply an aerial device? |
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Definition
| At least two 3" supply lines. |
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Term
| A minimum of ___psi residual pressure should be maintained when pumping from a hydrant. |
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Definition
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Term
| A minimum of ___psi residual pressure should be maintained when pumping from a hydrant. |
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Definition
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Term
| The difference between the static and flow pressure is known as the ________ pressure. |
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Definition
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Term
| To determine how much water is available from a hydrant, the percent decrease in pressure must be calculated. This can be done by using the formula: |
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Definition
| ((static-flow)100)/static |
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Term
If the decrease in pressure is:
0-10%
11-15%
16-25%
>25%
Then your additional water available is?
-
-
-
- |
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Definition
3 times the original amount
2 times the original amount
1 times the original amount |
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Term
| what is the formula for determining nozzle reaction of a smooth bore tip? |
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Definition
| NR= 1.5 x (Dsquared) x NP |
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