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On the majority of apparatus, the procedure for making the pump operational takes place:
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Pumping
Driver/Operator Pumping Apparatus, IFSTA 2nd edition Ch 11-16
| Question | Answer |
|---|---|
| The process for making the fire pump operational begins: | after the apparatus has been properly positioned and the parking brake has been set |
| On the majority of apparatus, the procedure for making the pump operational takes place: | before the D/O exits the cab |
| Except when the apparatus is used for pump and roll operations, what is the next step after the D/O exits the cab? | Chock the apparatus wheels |
| Of the 3 possible types of water supply for the fire pump, most D/O operate solely from the ____ at the vast majority of incidents. | onboard water tank |
| If it appears the pump will be required to furnish more than ____ percent of its rated capacity, it should be set to the PARALLEL (VOLUME) position from the start. | 50 percent |
| What is a danger of operating at negative pressure from a fire hydrant? | Increases the possibility of damage to the source pumper due to cavitation |
| What is the danger of operating at negative pressure from another pumper? | Can cause supply hose line to collapse, resulting in interruption of water supply. |
| When operating from a public or private water system, do not allow the incoming pressure from a hydrant to drop below ____ psi (kPa) to avoid possible damage to the water system. | 20 psi (140 kPa) |
| When choosing a hydrant, the best hydrants are located: | on large water mains that are interconnected in a grid pattern. |
| When choosing a hydrant, the worst hydrants are typically those located: | on dead end mains |
| What water main commonly becomes clogged with sediment and encrustation, further reducing their capacity? | single mains that supply small amounts of water |
| What are some ways in which reliability of hydrants can be found. | Access to the water dept records, map books with hydrant info and location, color coded to indicate flow |
| One possible problem with a forward lay depends on: | the distance from the hydrant to the fire and the length of hose carried on the engine. |
| When making a forward lay on dry barrel hydrants, it is recommended that ___ be attached to the unused hydrant discharges. | gate valves |
| With a reverse lay, hose is laid from: | the fire to the water source |
| A reverse lay is used so that ___ can be made before laying a supply line. | size up |
| If threaded couplings are used, hose beds set up for reverse lays should be loaded so that the first coupling to come off is: | male |
| The reverse lay has become a standard method for setting up a ____ operation when using medium diameter hose as a supply line. | relay pumping |
| A disadvantage to the reverse lay is that: | essential firefighting equipment must be removed and placed at the fire location before the pumper can proceed to the water source |
| When operating from any pressurized water source, do not engage the pump drive system ____ if there will be an extended period of time where water is introduced into the pump. | before leaving the cab |
| When putting the pump in service, if operating a 2 stage pump, set the ___ valve to the proper position before increasing the throttle to build discharge pressure. | transfer |
| When putting the pump in service, open discharge valves ___. | slowly |
| When using the percentage method to determine how much more water a hydrant can supply, first calculate the drop in pressure using the following formula: | (static - residual)(100)/static |
| Using the percentage method, if the percent decrease of the pumper intake pressure is between 0-10, how much more additional water is available? | 3 additional lines of the same flow |
| Using the percentage method, if the percent decrease of the pumper intake pressure is between 16-25, how much more additional water is available? | One additional line of the same flow |
| When using the first digit method for calculating available water, if the psi drop is equal to or less than the first digit of the static pressure multiplied by 1, how much more additional water is available? | 3 additional lines of the same flow |
| When using the first digit method for calculating available water, if the psi drop is equal to or less than the first digit of the static pressure multiplied by 2, how much more additional water is available? | 2 additional lines of the same flow |
| When using the squaring the lines method for calculating available water, square the number of lines currently flowing and multiply this by: | the original pressure drop |
| In most cases, a static water supply will be located: | at a lower level than the fire pump |
| In order to pump from a lower level static water supply source, ___ must be created by evacuating some of the air inside the pump. | a partial vacuum |
| To force water into the pump from a static water supply source, ____ is needed between the fire pump and the body of water to be used. | hard intake hose |
| What happens when an attempt is made to increase the discharge from the pump beyond the point of maximum vacuum on the intake? | Cavitation results |
| When selecting a draft site, the choice is dictated by: | type, amount, and accessibility of the water; cleanliness is NOT a factor |
| The MOST important factor in the choice of the draft site is the ____ of water available | amount |
| In order for a pumper to approach its rated capacity using a traditional strainer, there should be a minimum of ____ of water above the strainer. | 2 feet |
| If there is not an adequate amount of water above the strainer, the rapid movement of the water into the intake strainer creates: | a whirlpool |
| Low level strainers are designed to sit directly on the bottom of a tank or pool and are capable of allowing water to be drafted down to a depth of about: | 2 inches |
| Water that is below __ or above ___ may adversely impact the pumps ability to reach capacity. | 35 F; 90 F |
| Pumping ___ water can be harmful to the pump. | nonpotable (untreated) |
| Selecting a drafting site includes: | stability of the ground |
| If the apparatus is not able to park directly at the drafting location: | firefighters will have to carry the hose and strainer and put them into the desired position |
| If a barrel strainer is used at a drafting site, the rope that was tied to it can be used to suspend the strainer above the bottom by tying it to: | A tree,the pumper, or another fixed object |
| The entire priming action typically requires ___ seconds from start to finish. | 10-15 seconds |
| The most common cause of inability to prime is: | an air leak |
| What is a problem that may occur while operating from a draft? | air leak on the intake side of the pump |
| The water supply for sprinkler systems is designed to supply ___ of the total numbers of sprinklers on the system. | only a fraction |
| If there is any indication of an actual fire, a minimum of ____ should be connected to the FDC. | x2 2 1/2 inch hoselines |
| If recommended discharge pressure is not on the FDC plate or in the preincident planning information, the general rule of thumb is to discharge ___ into the FDC. | 150 psi |
| Generally, what lines should be used to support standpipe systems? | Fire dept attack lines |
| Add approximately ___ psi to the desired nozzle pressure for each floor above the standpipe connection that will have operating fire streams. | 5 psi |
| T or F: The first step that all D/O must take in order to begin any pumping operation is to make the fire pump operational. | True |
| T or F: IFSTA recommends that the apparatus wheels be chocked everytime the apparatus is stopped with the engine running and the D/O exits the cab. | True |
| T or F: If the indicator light does not light to indicate that the PTO has been properly activated and the pump engaged, turn the apparatus off. | False: If the indicator light does not activate, repeat the procedure. |
| T or F: Midship pumps require that both the pump and drive transmissions be in gear for operation. | True |
| T or F: The pump operator must be able to make a transition from the apparatus tank to an incoming water supply with no disruption of the fireground operation. | True |
| T or F: When operating from the water tank, the pump should be in a PARALLEL (VOLUME) position in most cases. | False: When operating from the water tank, the pump should be in SERIES (PRESSURE) position in most cases. |
| T or F: The 2 basic pressurized water supply sources that may be used to supply a fire pump are a hydrant or a supply hose from another fire pump. | True |
| T or F: When choosing a hydrant, the hydrant closest to the fire is always the best choice. | False: The closest hydrant may not always be the best choice |
| T or F: A forward lay involves stopping at the hydrant, dropping the end of one or more supply lines at the hydrant, and proceeding to the fire location. | True |
| T or F: A forward lay is the most expedient way to lay hose if the apparatus must stay at the water source. | False: A reverse lay is the most expedient if the apparatus must stay at the water source. |
| T or F: The reverse lay is used when the first pumper arrives at a fire and must work alone for an extended period of time | True |
| T or F: After the connections to the hydrant are made, the tank to pump valve must be closed before opening the hydrant. | True |
| T or F: When connected to the pump, a dry barrel hydrant must be opened all the way. | True |
| T or F: Successfully operating a fire dept pumper from draft is one of the most challenging tasks that D/O face. | True |
| T or F: For effective operation, the maximum lift considered to be reasonable for most fire dept pumpers is about 20 feet ( 6m) | True |
| T or F: If operating a two stage pump, the transfer valve should be in the SERIES (PRESSURE) position during priming. | False: the transfer valve should be in the PARALLEL (VOLUME) position for priming |
| T or F: The priming action should not be stopped until all the air has been removed and the primer is discharging a steady stream of water. | True |
| T or F: It is advisable to flush the pump with fresh water after operating from a draft. | True |
| T or F: Upon arrival at a sprinklered property, preparations should be immediately made to support the FDC. | True |
| Methods to prevent overheating the pump: | Open a discharge drain valve; partially open the tank fill valve or tank to pump; use bypass or circulator valve if equipped; tie off booster line and flow water through it |
| List steps for shutting down hydrant operation: | 1.)gradually slow engine rpm to idle reducing discharge pressure 2.)Take the pressure control device out of service if in use 3.)Slowly and smoothly close discharge valves 4.) Place drive transmission into neutral, and disengage the pump control device |
| List indicators that a pump is cavitating: | Hose streams will pulsate, and the pressure gauge on the pump will fluctuate; A popping or sputtering may be heard as the water leaves the nozzle; the pump will sound noisy like gravel is passing through it, A lack of reaction on the pressure gauge |
| The process of raising water from a static source to supply a pumper. | Draft |
| The elevation difference between the static water source and the pump intake. | Lift |
| The pressure differential between the inside of the pump and the intake hose and the atmosphere that allows water to be forced into the hose and the pump. | vacuum |
| Vacuum that would allow water to be raised by atmospheric pressure to a height in accordance with this pressure | theoretical lift |
| The maximum height to which any amount of water may be raised through a hard intake hose to the pump | Maximum lift |
| The height a column of water may be lifted in sufficient quantity to provide a reliable fire flow | Dependable lift |
| In the customary (metric) system of measurement, at sea level a pump could theoretically lift water ___ feet (meters). | 33.8 feet (10 m) |
| In most circumstances, the maximum lift of a fire pump is no more than: | 25 feet (7.5 m) |
| What is the equation for determining maximum lift? | 1.13Hg({0.013 56}{Hg}) |
| Every fire pump in good repair should have a dependable lift of at least: | 14.7 feet (4.5 m) |
| Net PDP takes into account: | FL, PDP, intake pressure correction |
| What is the equation for determining pressure correction? | Lift + total intake hose friction loss / 2.3 (lift + total intake hose FL / 0.1) |
| What is the equation for determining net PDP at draft? | PDP + Intake pressure correction |
| What is the equation for determining the adequacy of a small stream? | A x V x 7.5 (A x V x 1000) |
| The rule of thumb for evaluating pond and small lake capacity is that every 1 foot (0.3 m) of depth for an area of 1 acre (0.4 ha) provides ___ gpm for ___ hours. | 1000 gpm; 5 hours |
| Floating strainers allow safe drafting from natural water supplies as shallow as ____ feet (meters). | 1 foot (0.3 m) |
| In order to aid access to frozen ponds and lakes, barrels filled with _____ may be floated on the waters surface before the water freezes. | an antifreeze solution |
| What man made static water supply sources are underground storage receptacles that are usually found in areas that are not serviced by a hydrant system? | Cisterns |
| What may NOT be used to cut a hole into ice for the intake hose and strainer? | Pike pole |
| Which man made static water supply sources are man made impoundments that have the same characteristics as a pond or small lake? | Ground reservoirs |
| What man made static water supply source are commonly found on large residential, industrial, and agricultural properties? | Private water storage tanks |
| What man made static water supply source may be difficult to access due to security measures? | Swimming pools |
| What man made static water supply source transports water through open canals or portable pipes? | agricultural irrigation systems |
| T or F: Lift is the elevation difference between the static water source and the pump intake. | True |
| T or F: A total vacuum is not possible in field conditions. | True |
| T or F: A pump is only able to deliver 80% of its capacity at a 15 foot lift. | False: False: A pump is only able to deliver 70 PERCENT of its capacity at a 15 foot lift. |
| T or F: Natural static water supply sources include cisterns, swimming pools, and ground reservoirs. | False: Natural static water supply sources include: lake, pond, stream, river, ocean |
| T or F: T or F: The accessibility of natural static water supply sources may be compromised by freezing weather. | True |
| T or F: A depth of 1 foot of water above and below a barrel-type strainer is a good rule for minimum drafting depth. | False: 2 FEET |
| T or F: Natural water supply sources with excess silt and debris may clog fog stream nozzles. | True |
| T or F: Any operation that causes salt water or dirty water to be drawn into the pump requires that the pump be flushed with clean fresh water after the operation is complete. | True |
| T or F: All firefighters working within close proximity to bodies of water must wear PPE. | False: PFD- PERSONAL FLOATATION DEVICES |
| T or F: Many larger swimming pools may be equipped with dry hydrants that allow fire apparatus to be connected to them as a water supply source. | True |
Created by:
awray