Pump Operator – Flashcards
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have no established shape. They will conform to the shape of the vessel in which they are contained. They have very little adhesive quality and cannot be pulled or lifted.
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Fluids
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is used to attach a larger hose line to a smaller one. It has female threads on the smaller side and male threads on the larger side.
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Increaser
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is the height that water can be expected to rise upward from a static water source and provide a continuous reliable fire flow, it ` is usually considered to be 14.7 feet
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Dependable lift
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is 33.9 feet
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Theoretical lift
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the simultaneous execution of two or more operations.
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Parallel Operation
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Eliminate excessive pressure by controllong engine speed. (RPM's)
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Pressure Governors
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eliminate exccessive pressure by allowing the pressure to bypass to the intake side of the pump
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Relief valves
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have a fire pump, hose bed, and water tanks
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Triple combination pumper
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is a spiral, divergent chamber of a centrifugal pump in which the velocity energy given to water by the impeller bladders is converted to pressure.
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Volute
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NFPA 1002
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Qualifications for driver/operator
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to develop the proper attitude
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what is the first element in learning to drive safely
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Riding on the tailborad is NOT safe and must be discontinued. Safety gates or bars cannot make the tailboard safe to ride either
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Ture of False: is riding on the tailborad safe.
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backing up
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whenever possible the driver should avoid what
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Intersections
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what is the most likely place for an accident involving an emergency vehicle to occcur
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300 to 500 feet
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When more than one unit is responding along the same route, how many feet should the travel distance between the two be
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3 to 5 minutes
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Concerning diesel engines: when not responding to an alarm all how many mintues of warm-up time
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check the oil level, it may be low. Start-up oil pressure may be higher than normal driving pressure
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If the oil pressure gauge flutters, what should you do
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cold oil
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Low engine coolant temperature may result in poor lubrication because of
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generally found to the side of and slightly below the large diamerter intake of a pump
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where are gated 2 1/2 inch intakes generally found
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pressure supplied to the hose should not exceed that pressure at which the hose is annually tested by the department
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during dual or tandem pumping what should not be done
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on every emergency responce when two compaines performing like functions are dispatched
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when is level 1 staging used
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the resulting shock wave is transmitted back through the hose and ends at the water main
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when a pumper is connected to a hydrant and a nozzle is closed too quickly what happens
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either positive displacement or centrifugal
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Mechanically created pressure is generated by a fire pump
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the size of the pockets in the gears and the speen of rotation
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the total amount of water that can be pumped by a rotarty gear pump depends upon what
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unable to pump air and is not self-priming
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a centrifugal pump is
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are midslip mounted, split shaft drive
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Most fire pumps are what
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fill the tank, circulate water to prevent overheating, and relieve excess pressure
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the tank fill line can be used to
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pumping more than 500 gpm
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when operating a 1000 gpm pumper, the volume setting should be used when
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50 psi
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the transfer valve should not be operated at a net pump pressure greater than
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extra high pressure
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Additional impellers used in series are for what
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they will not prime themselves, the impeller turns at a very high speed, there is no positive blockage through the pump
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Major characteristice of xwnreifugal pumps include all the following
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calibrated to measure 600psi unless the pumper is equiped to supply hight pressure fog streams
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the pressure gauge mounted on a pumper must be
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desirable to reduce the incoming pressure below 20 psi.
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when pumping from a hydrant or in a relay it is not
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500 gallons
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the most commom size water tank found on pumpers is
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hose streams and pressure gauges fluctuate, popping or sputtering sound as water leaves the nozzle, gravel sounds coming from the pump, and the lack of reaction on the pressure gauge to changes in the setting of the throttle.
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Indications of pump cavitation include all the following
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local department policy, design of the apparatus, and type of priming device
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The sequence of operations for putting a fire pump into gear and getting water into the pump will vary with
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Neutral
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For stationary pumping of PTO pumps, place the transmission in which position
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24 inches
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During drafting operations in order for a pump to approach its rated capacity, there must be a minimum of how many inches of water over the strainer
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10 feet of lift
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all class A pumpers are rated to pump their capacity at what
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1,000 and 1,200 RPM's
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Most pumps prime between what RPM's
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stop priming and check to find out what the problem is
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when priming the pump, if water has not been obtained in 30 seconds, what should be done
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an air leak
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the most common cause of inability to prime is what
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relay operations should be shut down from the fire scene first
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when should relay operations first be shut down
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supply the connections with 150 psi and no more then 200 psi, and only at 15 psi at a time
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when supplying a sprinkler system, a good general rule is to
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200 psi
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when supplying statndpipe or sprinkler systems, pressures in excess of how many PSI are not encouraged and may damage the system
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daily
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changeover valves on two-stage pumps should be operated how offten
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90* F
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Altitude will affect a pumps performance and diesel engines lose of horsepower when the temperature is above what
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priming device, pump, and hard suction hose for air leaks
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a dry vacuum test is performed to check the
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7.481 gallons
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One cubic feet of water contains how many gallons
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231
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How many cubis inches are in one gallon
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feet of water
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Multiply inches of mercury by 1.133 to obtain what
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100% of rated capacity at 150 psi 70% of rated capacity at 200 psi 50% of rated capacity at 250 psi at a 10' lift throught 20' of hard suction hose
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What are the pump ratings under NFPA 1901
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foce per unit area. it can be expressed in pounds per square foot or pounds per square inch
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pressure is what
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in psi above atmospheric called positive pressure and pressure below atmospheric are measured in inches of mercury (HG). any pressure less than atmospheric pressure (14.7 psi) at sea level are called vacuums
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compound gauges on fire apparatus read pressure how
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the forward velocity pressure at a discharge opeing while water is flowing
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flow pressure is what
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14.7 pounds per square inch
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atmospheric pressure at sea level is
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.49 psi or 1.133 feet of water
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one inch of mercury equals
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back pressure
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head pressure is the same as
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50 psi
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Nozzle pressure for a handline is
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80 psi
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nozzle pressure for a master stream is
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300 gpm
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master sreams are considered to be all streams with a gallon flow greater than
