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op test123
| Question | Answer |
|---|---|
| Using a 1000 gpm pumper, when should you use volume? | When pumping more than 2/3 capacity. |
| How does a pump roll over hose when no bridges are available? | With hose fully charged and lay a tarp over it and cross at an angle. |
| What causes the most damage to the rubber inside line of the hose line? | cars rolling over it |
| When your vehicle foes into a skid, what should you do | turn wheels in directions of the skid and release the brake |
| residual pressure under what may cause cavitation | 20 psi |
| when pumping more than 2/3 capacity of the truck, the pump should be in what mode | volume |
| how many men are needed to back up the truck besides the operator | ideally two/ one with a radio |
| what vehicle can never be passed on a roll | school buses with lights on and other engines |
| a 2 stage centrifugal pump is made up of | one shaft, two impellers and the housing |
| when the impeller turns, it does what to the water around it | transmits energy in form of velocity and pressure |
| when using a one man carry and raise on a beam, what carry should be used | high shoulder |
| who makes the call on a 2 man carry | the rear or heel man |
| if a supply line collapses and water begins coming from the ground | the hydrant wasnt fully open |
| what is the advantage of a centrifugal pump | hose lines can be shut down for short periods of time without damage to the pump |
| besides driving too fast and not anticipating obstacles, what is one of the most main reasons for skidding | driver not anticipating/appreciated the weight shift and transfer |
| when using a foam eductor and the pressure is too high, what happens to the mix | pressure too high = too lean pressure too low = too rich |
| the compound gauges on a pump should read between what to what | -30 and 600 |
| what tool is used to open a hydrant cap and FDCs | hydrant wrench |
| What valve has a plate, handle and screw system | gate valve |
| with lights and sirens on, what should you do when approaching a stop sign | stop and proceed with caution |
| why are there different hose sections on a pump | for a variety of hose loads |
| what does the oil pressure gauge tell us | that oil is reaching critical areas of the pump |
| when transferring from tank to external water supply, how do you purge the air out of the line | intake bleeder valve |
| what type of primer pumps can run on direct drive or electrical power | rotary vane and rotary gear |
| why should you never use a cheater bar | weaken or breaking of a tool which can cause injurt to the firefighter |
| what is a disadvantage of aluminum ladders | theyt fail at 600 degrees and are electrical conductors |
| when is the only time the trcuk should be started | when responding to a call, official department business or normal maintenance |
| cpr ratio for one man | 30:2 |
| what are the first steps in determining carbon monoxide poisoning | headaches |
| class 6a extinguishers are used on what material | wood and paper |
| what extinguishers are used on class D fires | dry powder |
| when responding to a call, how far should an operator stay behind other emergency vehicles | 300ft |
| an apparatus begins to outrun the distance at which an audible warning devices can be heard at what speed | 50mph |
| when the truck is stuck in the mud what should you do | low rpm, release the truck and rock the truck back and forth |
| what is the purpose of an amp meter | gauge electrical current being drawn from and provided to the vehicles battery |
| what should you do during an SCBA regulator failre | open bypass valve |
| NPFA says that the maximum distance a 2.5 or 3 inch supply line can be stratched is | 300ft |
| when should hose be cleaned | after all fires and scheduled maintenance |
| upon arrival on scene you find a victim bleeding from the arm and has trouble breathing, what do you do | clear the airway |
| what is the most common type of pump in service | 2 stage centrifugal |
| when the hydrant is flowing, what type of pressure will fluctuate | residual |
| what type of pressure is found on a water distribution system during normal consumption demands | normal operating pressure |
| at what psi can you safely use the transfer valve | 50-75psi |
| what size line is needed to flow 350gpm master stream | one 3'' |
| at what pressure should you supply a sprinkler system | 150psi |
| you have a hose laid on a 30 foot ladder on the side of a window, what is the back pressure on that hose line | 15psi (5psi per floor--1 floor = 10ft) |
| why should you lay large diameter hose near the curb | so incoming trucks dont roll over the hose |
| when pressure remains the same and you increase teh diameter of the nozzle, what increases | GPM |
| when the gpm is doubled, what happens to the friction in the hoseline | it increases 4x |
| if the normal operating pressure of a solid bore handheld nozzle is 50 psi, what can you safely raise the pressure to | 65psi |
| what pressure is required to operate a solid bore master stream | 80psi |
| where should a truck stop when hooking up the to hydrant | a few feet before the connection |
| how many feet of lift can a class A pumper pump at 100% | 10' |
| what does the pitot gauge | velocity pressure |
| a 100gpm pumper pumping at half of its capacity is operating at thwat pressure | 25 psi |
| what hose is constructed of a rubberized, reinforced material designed to withstand partial vacuum | hard suction |
| what hose is used to transfer water from a pressurized water source | soft sleeve |
| how many inches around the strainer is required to prevent foreign objects from clogging it | 24 inches |
| what is the worst way to damage a centrifual pump | by shutting down hose lines for a long periods of time building extreme heat and make the wear rings expand |
| what causes the most damage to wear rings and packing | sand and sediment |
| what does the term catching the hydrant mean | connecting to the hydrant and running a supply line from it |
| how often are you supposed to back fluish the pump | weekly |
| why do you put two twists in a hose used as a supply line | to prevent kinks |
| in drafting operations, if pressures start to fluctuate, what is the first thing you should check? | intake connections |
| the braking time of an apparatus is the total of what | reaction time+braking distance |
| in a relay operation, where two trucks are less than 1000 feet apart and you need more pressure, what should you do | add another line, if more than 1000ft add another truck |
| what is the net discharge pressure | pump pressure minue hydrant pressure |
| what is the maximum amount of lift a pumper can draft | 20 feet or 60% |
| what valve is used to prevent water from flowing back into the FDC | check/clapper valve |
| a water system which utilizes lateral feeders for improved distribution is called | grid system |
| what size is a primary feeder | 16inch |
| what size is a secondary | 12inch |
| what size is a distributor | 8inch |
| what is a pressure governor | regulates the power output of the engine to match the pump discharge requirements |
| where do you check an infants pulse | between the elbow and the shoulder on the inside of the arm(brachial pulse) |
| what valve is designed to eliminate hazardous conditions resulting from excessive pressure by allowing this pressure to bypass to the intake side of the pump | relief valve |
| what size water tank does a class 1 pumper carry | 500 gallons |
| what is a BTU | amount of heat required to raise one pound of water on degree F |
| what is the expansion rate of water | 1700x |
| what is friction loss | loss of pressure created by the turbulence of water moving against the interior walls of the hose or pipe |
| what is the beam of the ladder | the sides |
| what is the proper angle of a ladder | 70-75 degrees |
| what is the fly section of the aldder | the part that extends |
| what is the butt or heel of the ladder | bottom feet |
| what are the pawls | device used to secure the fly section |
| what is the rope used to secure the fly | halyard |
| what is a reverse lay | dropping supply line at the fire and proceeding to the hydrant |
| what is a forward lay | dropping supply line at the hydrant and going to the scene |
| where should a hose clamp be placed | at least 25 feet behind the truck on the coupling side |
| what are auxiliary coolers used for | to control engine temps during a pump operation |
| a relay operation should not operate above what psi 200 psi | 200 psi |
| which pump is most effective in pumping air | rotary vane |
| on a relay operation, which pump shuts down first | the attack pump |
| what does the compound gauge measure | intake pressure |
| what is a relief valve | pressure controlled device designed to eliminate hazardous conditions resulting from excessive pressures by allowing this pressure to bypass into the intake side of the pump |
| maximum capacity of a relay operation is determined by what | the capacity of the smallest pump and the smallest diameter hose |
| what is the NFPA standard for automotive fire apparatus | 1901 |
| while pumping in volume and transferring to pressure what happens to engine RPM | get lower |
| what is the fesired pressure for all fog nozzles | 100psi |
| when shutting down a relay operation the terminal pump should | decrease throttle, shut down discharges and take out of pump |
| what is used to regulate engine RPM and pump impellers | pressure governor |
| what controls the temperature of water in the apparatus in a pumping opertaion | auxiliary cooler |
| what speed should you leave the firehouse | 10mph |
| how should you pass through a red light or stop sign | come to a complete stop before proceeding with caution |
| the pressure of a liquid in an open vessel is proportional to what | the depth and density of the liquid |
| what is the definition of making a hydrant | the procedure for connecting to and laying hose forward from a fire hydrant |
| when can you disregard some traffic laws | only when responding to an emergency call |
| what causes the impeller and gears to expand | heat from water churning inside the pump |
| what is the pump trying to accomplish when drafting | to create a vacuum/lower pressure in the pump and in the intake hose than atmospheric pressure resulting with water being forced up into the hose and into the fire pump |
| what is one of the purpose of a drain valve | to remove pressure from a hose line after the discharge valve and nozzle have both been clsoed |
| how do you determine the best route when responding to a call | consider traffic, road closing and incident location |
| what is the preferred method for operating a vehicle in the mud | use low gear and maintain a steady rpm |
| after using a sprinkler system, how should the stem and valve be placed and by who | open and by the maintenance crew |
| after connecting a pitot gauge to a hydrant with no water flowing, what type of pressure is the gauge measuring | static pressure |
| what does the spring loaded pilot valve do | actuates the relief valve |
| how does the pilot valve work | it permits water to dump back into the intake |
| what causes cavitation | trying to discharge more water than you intake |
| what is the purpose of a relay operation | to overcome friction and elevation loss due to the distance between the fire and the water source |
| when relay pumping, what is the friction loss directly affected by | the amount of water being flowed, the size of the hose and the distance between pumps |
| in a relay operation, where should the largest capacity pumper be placed | the water source |
| while in a relay operation and the attack lines are shut down, what should be done to prevent a dangerous buildup of pressure | open a dump line |
| the pressure at the outlet of an inline eductor (also known as back pressure) must exceed what % of the inlet pressure | 65-70% |
| what is the preferred method for shutting down a pump to minimize overheating | let the pump idle for 3-5 minutes before shutting down |
| when supplying a master stream and more flow is required, what should be done | add another line |
| when should warning devices be operated | from the time you leave the station and arrive on scene |
| what are two types of auxiliary coolers commonly found on old pumpers | marine and immersion coolers |
| a pressure gauge that has a curved flat tube that changes it curvature as pressure changes is called what | bourdon tube |
| where does the first arriving pump park in a relay | at the scene |
| a 1000 gpm pumper pumping at full capacity is operating at what pressure | 150 |
| how much pressure is exerted by the atmosphere at sea level | 14.7 |
| the major advantage of positive-displacement pumps over centrifugal pumps are | self priming |
| what is the name of the fire pump that contains two tightly meshed gears inside a water tight casing | rotary gear pump |
| when several attack lines are being supplied and each required a different pressure, what should the engine be set at | at the highest pressure needed |
| by special legislation, fire department apparatus may be exempted from obeying posted speed limit signs when | responding to emergencies only |
| what determines the additional water available from a hydrant | the difference between static and residual pressure |
| when a pumper is discharging water, the intake gauge displays what | residual pressure |
| if the rear end of the vehicle begins to skid | turn wheels in that direction |
| when a pumper is connected to a hydrant and not discharging water, pressure shown on the intake gauge is | static pressure |
| the most important part of defensive driving is | anticipating other drivers actions |
| which part of the road surface would most likely freeze | overpass |
| when starting an apparatus with a manual transmission, the transmission and clutch should be in what position | neutral and disengaged |
| density of liquid in relation to water | specific gravity <1float >1 sink |
| first principle of water | pressure perpendicular to the walls of a container |
| second principle of water | fluid pressure at a point in a fluid at rest is the same in all directions |
| third principle of water | pressure is applied equally in all directions |
| fourth principle of water | fluid is proportional to its depth |
| fifth princple of water | pressure of a liquid in an open container is proportional to its density |
| sixth principle of water | pressure is the same regardless of shape |
| centrifugal pumps cannot create vacuums, they need | separate priming devices |
| when calculating friction loss | never count the bottom floor for standpipe systems |
| self sustaining process of rapid oxidation of a fuel which produces heat and light | combustion |
| forward velocity pressure at a discharge opening while water is flowing | velocity pressure |
| at rest or without motion, stored potential energy | static pressure |
| total available pressure NOT used to overcome friction loss or gravity | residual pressure |
| pressure found in a water distribution system during normal consumption demands | normal operating pressure |
| loss of pressure created by the turbulence of water moving against the interior walls of the hose or pipe | friction loss |
| pressure control device designed to eliminate hazardous conditions result from excessive pressures by allowing this pressure to bypass into the intake side of the pump | relief valve |
| valve used for placing multi stage centrifugal pumps in volume or pressure operation | transfer valve |
| pressure exerted by the atmosphere at the surface of the earth to the weight of the air | atmospheric pressure |
| total amount of pressure loss in a hose assembly due to friction loss in the hose and appliances, elevation loesses, or any other factors | total pressure loss |
| gain or loss of pressure in a hose line due to change in elevation | elevation pressure or elevation loss |
| If flow is greater than 350gpm | Add 10psi for pressure lose in a wye or water thief, and 25 for master stream |
| Solid stream hand line pressure | 50 gpm |
| Solid stream master pressure | 80 gpm |
| Friction loss for a master stream appliance | 25 gpm |
| NFPA 1001 | Firefighter Qualifications |
| NFPA 1002 | Operator Qualifications |
| NFPA 101 | Life Safety |
| NFPA 1451 | Vehicle Ops Training Program |
| NFPA 1700 | Structual Firefighting |
| NFPA 1901 | Fire Apparatus |
| NFPA 13 | Sprinkler Systems |
| 3 things to consider in woodland fires | Fuel, Weather and Topography |
| Average height of residential buildings | 10’ |
| Who can be held liable in an apparatus collision | Department and/or Operator |
| Logistics on a hazmat is staged in | Cold Zone |
| If a hybrid car is on fire then | Do not approach the vehicle and establish scene safety |
Created by:
mteach22
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