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35 Cards in this Set
- Front
- Back
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_____ _____ is pressure caused by the weight of the atmosphere, is 14.7 pounds per squar inch at sea level.
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Atmoshperic Pressure
pg 257 pump ops |
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A ____ which is any pressure less than atmospheric pressure. This difference in pressure supports a column of liquid, and is commonly measured in units of inches or millimeters of mercury (Hg).
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Vacuum
pg 257 pump ops |
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A fire pumper in good condition should be able to develope a vacuum equal to about ___ inches of Hg. This equates to the ability to lift water approximately ___ feet at see level.
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22 inches of Hg. Approximately 24.8 feet at sea level
pg 258 pump ops |
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_____ ____ is the height that a column of water can be lifted in a quantity considered sufficient to provide reliable fire flow; it is generally considered to be 15'.
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Dependable Lift
pg 258 pump ops |
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A Class "A" pumper must lift water __' through 20" of hard-suction supply hose and deliver its rated capacity at a discharge pressure of ___ psi.
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10 feet through 20 feet of hard suction
discharge pressure of 150 psi pg 258 pump ops |
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_____ is the process of removing air from a fire pump and replacing it with water.
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Priming
pg 258 pump ops |
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The ____ ___ ____ is a small tank that holds the lubricant for the priming pump. It is generally located slightly higher than the pump and often is enclosed behind an access panel on the side or the top of a fire apparatus.
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Primer oil Reservoir
pg 258 pump ops |
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The ___-___ ___ is a very small hole, found in the fitting on top of the primer oil reservoir or in the top of a loop in the lubricaiton line leading to the priming pump.
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Anti-Siphon hole.
pg 258 pump ops |
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A fire pump that retains a vacuum for __ minutes should prime and draft water easily in most situations.
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5 minutes
pg 261 pump ops |
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Several factors must be considered when you are determining the relaibility of a static water source-- namely: (
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1. Accessibility
2. quantity o fwater available 3. quality of the water in the static water source. pg 263 pump ops |
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To calculate the amount of water available in a nonmoving source, you will multiply what?
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multiply the Length x the Width x the Depth x the constant 7.5
(LxWxDx7.5=available water) pg 263 pump ops |
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To calculate the amount of water in a moving source, you must determine the demensions of the stream, canal, or river. You will calculate how?
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WxDxVx7.5= quantity of water availble
W= Width D= Depth V= Velocity pg 263 pump ops |
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The ______ _____ is most commonly used for deep water sources in which you are confident that the strainer will not be able to contact the bottom of the source or large debris fields.
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Barrel Strainer
pg 267 pump ops |
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The ___-___ strainer is designed for use in clean, shallow water sources. This squar-shaped, flat strainer has an opening between two flat plates of aluminum, typically with a 2" wide gap between the 16" plates on the top and bottom of the strainer.
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Low-Level Strainer
pg 267 pump ops |
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The ____ ____ is designed to operate below the surface scum, and above the weeds, dirt, and silt in the water source.
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Floating Strainer
pg 268 pump ops |
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When you are using a barrel strainer, there shoud be at least ___" of water in all directions around the strainerl.
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24"
pg 268 pump ops |
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The low-level and floating strainers are designed to operate in shallow conditions and require only ___" of water depth.
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24"
pg 268 pump ops |
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A ___ ___ is a small-diameter hose line that remains in the open position and continues flowing water during the entire drafting operation. This line will help to maintain the draft even if you discharge pressures are low because it is constantly flowing water that has been drafted from the water source to start the flow of water.
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A Dump Line
pg 270 pump ops |
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Observe the in-take pressure while drafting, if you see any drop in pressure, you should do what?
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Check the strainer for the presence of debris.
pg 273 pump ops |
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If not enough water covers the strainer or if the draft is strong as a result of flowing large volumes of water, a _______ may form as a vacuum draws in water. This allows the pump to suck in air, which can break the vacuum and cause a loss of water supply. To avoid this problem, place a _____ which will act as a seal and prevent air from being sucked into the pump.
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Whirlpool
Inflatable ball pg 273 pump ops |
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______ occurs when you attempt to flow water faster than it is being supplied.
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Cavitation
pg 273-274 pump ops |
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If you suspect cavitation during a drafting operation, follow these steps: (4)
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1. Check the water around the screen on the hard suction supply hose.
2. Check the vacuum reading on the master supply gauge. 3. If you have a near-normal vacuum reading, check for vacuume leaks 4. If you have a higher than normal vacuum reading, check the intake screen. pg 274 pump ops |
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True / False
The failure of the pump to prime is one of the most common problems that occurs during drafting operations. |
True
pg 274 pump ops |
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A ___ ____ _____ can be one of the most complex operations on the fire ground because it requires at least two pumpers, and sometimes as many as four, to form a relay. In this process, water is pumped from a water source through hose under pressure to the apparatus engaged in fire suppression efforts.
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Relay Pumping Operations
pg 275 pump ops |
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The ____ ____ is the most important pumper in a relay because it is located at a water source and supplies the water to the entire incident.
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Source pumper
pg 275 pump ops |
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A minimum of ____ crew members should be assigned to eash fire pumper if the pumper will be exposed to moving traffic and other hazards around the fire apparatus.
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Two crew members
pg 277 pump ops |
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A good rule of thumb is that no relay operation should extend for more than ___ feet.
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800 feet
pg 277 pump ops |
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Two basic types of relay pumping operations are performed. What are they?
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1. Calculated Flow Relay
2. Constant Pressure Relay pg 279 pump ops |
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Which type of relay is the most common?
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Calculated Flow Relay
pg 279 pump ops |
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During an relay operation, if the attack pumper were flowing 500 GPM and a 200 GPM nozzle was shut down, all of the pumpers in the relay would see an increase in pressure. This event should not be a concern unless the pressure fluctuation is greater than ____ psi.
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200 psi--- a magnitude of change that could cause hose lines failure or pump damage.
pg 282 pump ops |
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Should the attack pumper open an additional line that results in an increase of flow, all pumpers in the relay will need to ensure that they do not drop below ___ psi residual pressure to avoid pump cavitation.
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20 psi
pg 282 pump ops |
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When shutting down the relay operation, the ___ pumper acts first.
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Attack pumper
pg 282 pump ops |
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A ___ ___ is any location at which a tanker can be filled, such as a hydrant, a pond, a lake, or a river.
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A Fill Site
pg 283 pump ops |
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The dump valve is a large opening, which can be as large as __ to __ inches, that is connected directly to the tank that allows it to be emptied quickly, in some cases within ____.
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as large as 12 to 16 inches
in some cases within one minute pg 289 pump ops |
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The operation of offloading a tanker into another tanker or into a pumper as a form of a water source is called a ____ ____ ____.
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Nurse Tanker Operation
pg 292 pump ops |
