DRIVER PUMP OPERATOR EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026

DRIVER PUMP OPERATOR EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026 According to the data compiled by NIOSH, the number or firefighter fatalities occuring while responding to or returning from emergencies is second only to the number of fatalities occuring from: - Answers Heart Attacks NFPA 1002,_______ sets the minimum qualifications for driver/operator - Answers Standard for Fire Apparatus Driver/Operator Professional Qualifications Which of the following is a skill recommended, but not required, to be a driver/operator? - Answers Mechanical skills Which of the following is an activity that a driver/operater is NOT ordinarily expected to perform at a scene? - Answers Using a chainsaw for ventilation NFPA 1582 requires that firefighters have a corrected far visual acuity of ______ with contact lenses or spectacles. - Answers 20/40 What is the main purpose of the fire department pumper? - Answers Providing water at an addequate pressure for fire streams NFPA standards specify that the minimum pump capacity for pumpers is: - Answers 750 gpm (3000 L/min) Which of the following is not required on a fire department pumper? - Answers First aid/medical equiptment Industrial, airport, municipal, and wildland fire departments commonly have pumpers capable of discharging firefighting foam on: - Answers Both class A and class B fires Class B foam systems allow firefighters to handle: - Answers Flammable/combustible liquid fires Some fire departments have a designated apparatus maintenance officer who meets the requirements of an Emergency Vehicle Technician according to: - Answers NFPA 1071 Typically career departments require driver/operator to perform apparatus inspections and maintenance checks: - Answers At the beginning of each tour of duty Which of the following is NOT a function of apparatus maintenance and inspection records? - Answers They may be used in deciding whether to hire new staff Over-cleaning an apparatus can lead to: - Answers Removal of lubrication from chassis During the first six months after an apparatus is received, the vehicle should be washed frequently with ______ to harden the paint and keep it from spotting. - Answers Cold water Statistics compiled by the NFPA historically shows that ______ of all firefighter injuries and deaths in the U.S. are caused by vehicle collisions while responding to or returning from emergency calls. - Answers 20 to 25 percent Which of the following seldom causes serious injury or death, but accounts for a significant portion of overall damage costs? - Answers Improper backing of the apparatus Excessive speed by the fire apparatus driver/operator can result in which of the following? - Answers Inability of driver/operator to stop in time to avoid a collision with another vehicle Which of the following is NOT a factor that contributes to collisions that involve driver/operator error as the cause? - Answers Insecurity in one's driving ability Which of the following statements about driving regulations is TRUE? - Answers If a driver/operator does not obey driving regulations and is involved in a collision, both the driver/operator and the fire department may be held responsible. When positioning for fire attack, if the apparatus arrives at a location where no fire conditions are evident, where should the apparatus be positioned? - Answers Near the main entrance of the occupancy When positioning for fire attack, with no fire conditions evident, which of the following is NOT a responsibility of the driver/operator? - Answers Enter the structure and investigate the situation What is the first tactical priority at any fire incident? - Answers Life safety Which of the following statements about positioning an apparatus is FALSE - Answers Choose an unpaved surface over a paved surface What size is the collapse zone? - Answers One and one-half times the height of the building Atmospheric Pressure - Answers Pressure exerted by the atmosphere at sea level (14.7 psi [101kPa]) Psig - Answers Gauge Reading Psia - Answers The psi above a perfect vacuum, absolute zero. Vacuum - Answers Any pressure less than atmospheric pressure Perfect vacuum - Answers Absolute zero pressure Negative pressure - Answers Gauge readings of less than 0 psi or kPa Head - Answers The height of a water supply above the discharge orifice Head pressure - Answers The result of dividing the number of feet that the water supply is above the discharge orifice by 2.304. Static pressure - Answers Stored potential energy available to force water through the pip, fittings, fire hose, and adapters. Static - Answers At rest of without motion Normal Operating Pressure - Answers That pressure found in a water distribution system during normal consumption demands. Residual pressure - Answers That part of the total available pressure not used to overcome friction loss or gravity while forcing water through pipe, fittings, fire hose, and adapters. Residual - Answers A remainder, or that which is left What is defined as "a stream of water or other extinguishing agent after it leaves a nozzle until it reaches the desired point"? - Answers Fire stream Which of the following is NOT a basic type of fire stream - Answers Constant Solid stream nozzles are designed to produce a stream as ______ as possible with little shower or spray. - Answers Compact What characteristic does a solid stream nozzle have that other streams may not? - Answers Superior reach Solid stream nozzles should be operated at ______ psi (kPa) on handlines. - Answers 50 psi (350kPa) Why is it necessary to know the amount of friction and pressure loss in fire hose? - Answers To produce effective fire streams Which of the following is NOT a cause of friction loss? - Answers Hydrant condition The calculation of friction loss must take into account the: - Answers Length and diameter of the hoseline Together, friction loss and elevation pressure loss are referred to as: - Answers Total pressure loss Which two methods are used to determine friction loss? - Answers Field tests and calculations Which of the following is NOT a method for determining pressure loss and required pump discharge pressure? - Answers Flow charts Flowmeters provide: - Answers Water flow in gpm (l/min) Flowmeter are particularly advantageous in: - Answers Supplying hoselines or master stream devices equipped with automatic nozzles Flowmeters are allowed to be used instead of pressure gauges on all discharges: - Answers 1.5" to 3" (38mm to 77mm) in diameter What size discharges may be equipped with a flowmeter but may also have a pressure gauge? - Answers 3.5" or larger The modern fire department pumper is equipped with a ______ as its main pump. - Answers Centrifugal pump Unlike centrifugal pumps, positive displacement pumps: - Answers Can pump air What provides for the movement of the water through a piston positive displacement pump? - Answers A piston that moves back and forth or up and down inside a cylinder The output of the piston positive displacement pump is determined by the size of the cylinder and the: - Answers Speed of the piston travel The capacity of a piston positive displacement pump is usually determined by the size of the: - Answers Cylinder Draft - Answers The process of raising water from a static source to supply a pumper Lift - Answers The elevations difference between the static water source and the pump intake Vacuum - Answers 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 pump. Theoretical lift - Answers Vacuum that would allow water to be raised by the atmospheric pressure to a height in accordance with this pressure. Maximum lift - Answers The maximum height to which any amount of water may be raised through a hard intake hose to the pump. Dependable lift - Answers The height a column of water may be lifted in sufficient quantity to provide a reliable fire flow In the customary (metric) system of measurement, at sea level a pump could theoretically lift water ______ feet (meters) - Answers 33.8 feet (10m) Which of the following is the pumper connected to the water supply at the beginning of the relay operation? - Answers Source pumper Which of the following is the pumper connected within the relay that receives water from the source pumper, boosts the pressure, and then supplies water to the next apparatus in the relay? - Answers Relay pumper In a relay pumping operation, the attack pumper is: - Answers The engine supplying attack lines and appliances Which of the following enhance firefighter safety and reduce the possibility of damage to the pump caused by water hammer? - Answers Intake pressure relief valves A relay operation is based on which two things? - Answers Amount of water required and distance from the scene to water Ideally, when positioning the fill site pumper, the pump panel should be located so that the driver/operator can view: - Answers Both the fill and source operations Regardless of whether a hydrant or static source is used, a ______ should be continuously flowed from the fill site pumper to prevent a loss of prime. - Answers Booster line or some other type of small discharge line Although hoses used to fill tenders vary, the most common and most efficient are: - Answers Two 2.5" (65mm) direct tank fill connection and on LDH direct tank fill connection to the rear of the vehicle The ideal fill position is one that: - Answers Allows the driver/operator to enter and exit the fill site without turning around or backing up If available, ______ Inch (mm) hose should be used to fill tenders as it allows for quicker filling of the tank. - Answers 3 inch (77mm) Which of the following is the device that introduces foam concentrate into the water stream to make the foam solution? - Answers Foam proportioner Which of the following is the mixture of foam concentrate and water before the introduction of air? - Answers Foam solution The term "aerate" means to: - Answers Mix with air Which of the following is NOT needed to produce quality fire fighting foam? - Answers Vacuum pumps Which of the following is NOT a way in which foam extinguishes and/or prevents fire? - Answers Blanketing If the requirements of NFPA 1901 are included in the apparatus bid specification, which two tests must be performed by the manufacturer? - Answers The road test and the hydrostatic test When performing road tests, the apparatus should be: - Answers Fully loaded as it would be once in service In a road test, the apparatus must accelerate to ______ mph (km/h) from a standing start within 25 seconds. - Answers 35 mph (56km/h) In a road test, the apparatus must achieve a minimum top speed of ______ mph (km/h) - Answers 50 mph (80 km/h) In a road test, the apparatus must come to a full stop from 20 mph (32 km/h) within ______ feet (m) - Answers 35 feet (10.7m) Pumps are tested hydrostatically at ______ psi (kPa) for three minutes - Answers 250 psi (1725 kPa) Which of the following statements about hydrostatic tests is FALSE? - Answers Intake valves should be opened and capped When using a static source for pumper service tests, the water must be at least ______ deep. - Answers 4 feet (1.2 m) When using a static source for pumper service tests, the strainer must be submerged at least _______ below the surface of the water. - Answers 2 feet (0.6 m) Air temperature for pumper service tests should be between: - Answers 0*F and 100*F (-18*C and 38*C) Which of the following is the equation for determining the correct pump discharge pressure during pumper service tests? - Answers Lift (FT) + intake hose friction divided by 2.3 / Lift (m) + intake hose friction loss / 0.1 All gauges used for service tests must have been calibrated within: - Answers 60 days of the testing What is the first service test to be performed? - Answers Engine speed check Which service test is performed to check the priming device, pump, and hard intake hose for air leaks? - Answers Vacuum test Which service test checks the overall condition of the engine and the pump? - Answers Pumping test Which service test ensures that the piping between the water tank and pump is sufficient to supply the minimum amount of water specified by NFPA 1901 - Answers Tank-to-pump flow test Which method for testing a foam proportioning system measures the accuracy of foam proportioning equipment by checking the volume of foam concentrate drawn through the system while in operation? - Answers Foam concentrate displacement method which method for testing a foam proportioning system is used to test the quality of foam solution after it has been created by a foam proportioning system? - Answers Foam solution refractivity testing Which method for testing a foam proportioning system is used to test the quality of synthetic based foams that are produced by foam proportioning equipment and systems? - Answers Foam solution conductivity testing Which of the following is NOT a method for performing conductivity testing on foam solution? - Answers Conductivity meter testing Which foams are not proportioned as other foams? - Answers Class B foams Which method of proportioning uses the pressure energy in the stream of water to draft foam concentrate into the fire stream. - Answers Induction Which method of proportioning used and external pump or head pressure to force foam concentrate into the fire steam at the correct ratio in comparison to the flow? - Answers Injection Which of the following foam storage methods are found on municipal and industrial pumpers, foam tenders, and ARFF apparatus? - Answers Apparatus tanks Which of the following foam storage methods are most common in industrial applications? - Answers Barrels Which of the following foam storage methods are the most common containers used by the municipal fire service. - Answers Pails Which of the following would NOT be a typical use for Class A foam? - Answers Flammable liquid Fire Class A foams should be proportioned at ______ for fire attack and overhauls with standard fog nozzles. - Answers 0.2% to 0.5% foam concentrate Class A foams should be proportioned at ______ for any application with air aspirating foam nozzles. - Answers 0.3% to 0.7% foam concentrate Areas requiring a balance of penetrating and clinging ability require: - Answers Medium class A foam Which of the following would be a typical use for Class B foam? - Answers Combustable liquid fire Which of the following are considered safer for the environment? - Answers Protein-based Class B foams Which of the following is NOT a factor when determining the rate of application for firefighting foam? - Answers Quality of the foam concentrate In order to determine the application rate of foam available from a nozzle: - Answers Divide the nozzle flow rate by the area of the fire Which of the following is based on fluoroprotein foam technology with AFFF capabilities? - Answers Film forming fluoroprotein foam Which of the following has a low water content, which minimizes water damage? - Answers High expansion foam Which of the following is derived from protein foam concentrates to which fluorochemical surfanctants are added? - Answers Fluoroprotein foam Which of the following is completely synthetic? - Answers Aqueous film forming foam Low-energy foam systems impart pressure on the foam solution solely by the use of: - Answers A fire pump Which of the following are used where flows in excess of 350 gpm (1400 L/min) are required? - Answers Self-educting master stream foam nozzles Which of the following operate on the same principle as the in-line eductor, but the eductor is built into the nozzle rather than into the hoseline? - Answers Foam nozzle eductors Which of the following area types of the in-line eductor that allow the foam concentrate supply to be as far away as 3000 feet (900m) from the self-educting master stream nozzle? - Answers Jet ratio controllers Which of the following are designed to be either directly attached to the pump panel discharge or connected at some point in the hose lay? - Answers In-line foam eductors Which of the following is the simplest means of proportioning foam? - Answers Batch mixing Which of the following are controlled by monitoring the water flow and controlling the speed of a positive displacement foam concentrate pump? - Answers Variable-flow variable-rate direct injection systems Which of the following consist of a small return (bypass) water line connected from the discharge side of the pump back to the intake side of the pump? - Answers Around the pump proportioners Which of the following are most commonly used in large-scale mobile apparatus applications such as airport crash vehicles and refinery fire fighting apparatus? - Answers Bypass type balanced pressure proportioners Which of the following use the same principles of operation as do portable in-line eductors, but are attached to the apparatus pumping system? - Answers Installed in-line eductor systems Which of the following have a variable-speed mechanism that drives a foam concentrate pump? - Answers Variable flow demand type balanced pressure proportioners Installed in-line eductor systems are most commonly used to proportion: - Answers Class B foams A limitation of the bypass-type balanced pressure proportioner is: - Answers Its need for a foam pump with PTO or other power source High-energy foam systems differ from low-energy foam systems in that they: - Answers Introduce compressed air into the foam solution prior to discharge into the hoseline. Which of the following is an advantage of CAFS? - Answers A CAFS provides a sager fire suppression action Which of the following is a limitation of CAFS? - Answers Hose reaction can be erratic with a CAFS? Which of the following is "any nozzle that one to three firefighters can safely handle and flow less than 350 gpm (1400 L/min)"? - Answers Handline nozzle Which portable foam application devices are limited to Class A, CAFS applications? - Answers Smoothbore nozzles Which portable foam application devices break the foam solution into tiny droplets and use the agitation of water droplets moving through air to achieve the foaming action? - Answers Fog nozzles Which portable foam application devices induct air into the foam solution by a venturi action? - Answers Air-aspiration foam nozzles Which portable foam application devices are required to deliver adequate amounts of foam on large-scale flammable and combustable liquid fires? - Answers Master stream foam nozzle The water aspirating type of medium and high expansion foam generators are very similar to other foam producing nozzles except that they are: - Answers Much larger and longer Which foam application technique may be employed when a vertical surface is near or within the area of a pool of ignitable liquid? - Answers Bank-down method Which foam application technique directs the foam stream on the ground near the front edge of a burning liquid pool of spill? - Answers Roll-on method Durable agents retain their fire retarding properties: - Answers A longer time than Class A foam Durable agents are used in the same way as ______, but are chemically and structurally quite different. - Answers Class A foams Durable agents are normally applied at a ratio of ______ for fire extinguishment. - Answers 1% What is the problem with using portable fill pipes made of PVC to top fill water tenders? - Answers PVC becomes brittle in extremely cold weather At the fill site, it is recommended that the fill site pumper remain ______ with the tender fill lines charged at all times. - Answers In gear Who should monitor the ground conditions around the fill site? - Answers The make and break personnel or fill site officer When should the fill site be shut down? - Answers When the decision has been made that the operations is no longer necessary In which dump site method does a water tender pump the water from its tank directly into the pump intake of the attack pumper? - Answers Direct pumping operations Which dump site method uses one or more portable water tanks as the dump site water supply source? - Answers Portable water tank operations In which dump site method is the tender usually so large that the fire is controlled before there is a need to refill its tank? - Answers Nurse tender operations Which of the following is NOT a water tender discharge method? - Answers Top filling Single portable tank operations work on fires that require less than: - Answers 300 gpm (1200 L/min) Before shutting down a dump site operation, it is generally a good idea to make sure that the attack apparatus and dump site pumper have: - Answers Topped off their onboard water tanks Which of the following is the equation for determining the travel time of a shuttle operation? - Answers 0.65+(1.7)(distance in miles) or [0.65+(1.06)(distance in km)] Which of the following is the equation for determining the handling time of a shuttle operation? - Answers Fill site time + dump site time Which of the following is the equation for determining tender flow rate? - Answers (tender water tank size-10%) divided by (travel time+handling time) Which of the following is NOT used to increase the amount of flow through a relay? - Answers Increase the size of the pumpers in the relay What is the maximum distance relay method? - Answers A method that involves flowing a predetermined volume of water for the maximum distance that it can be pumped through a particular hose lay. Which of the following equations is used to calculate the number of pumpers needed to relay a given amount of water? - Answers (Relay distance divided by Distance from table 13.1 or 13.2)+1 What is the constant pressure relay method? - Answers A method that provides the maximum flow available from a particular relay setup by using a constant pressure in the system Which of the following is an advantage of the constant pressure relay method? - Answers Speed relay activation Driver/operators in a constant pressure relay should continue to adjust their pump discharge pressure to 175 psi (1200kPa) until: - Answers Intake pressure from pressurized sources drops to 20 psi (150kPa) A relay pumping operation always begins with the: - Answers Source pumper If a relay is being supplied from draft, the ______ will have to develop a higher net pump discharge pressure than the other pumpers in the relay. - Answers Source pumper used Failure to keep water moving through the pump during a relay could result in ______, thus delaying the operation. - Answers Loss of prime Sometimes a relay can be started, or hoselines filled, with water from the: - Answers Apparatus water tank When putting a relay into operation, it is most desirable to maintain an intake pressure of: - Answers 20 to 30 psi (150 to 200 kPa) Which man-made static water supply sources transport water through open canals or portable pipes? - Answers Agricultural irrigation systems Which of the following is the equation for determining the capacity of a square/rectangular pool? - Answers LxWxDx7.5 (LxWxDx1000) Which of the following is the equation for determining the capacity of a round pool? - Answers PixR^2xDx7.5 (PixR^2xDx1000) In most circumstances, the maximum lift of a fire pump is no more than: - Answers 25 feet (7.5m) Which of the following is the equation for determining maximum lift? - Answers 1.13 Hg ([0.01356][Hg]) Every fire pump in good repair should have a dependable lift of at least: - Answers 14.7 feet (4.5m) Net pump discharge pressure takes into account all of the following EXCEPT: - Answers Maximum lift Which of he following is the equation for determining pressure correction? - Answers Lift+total intake hose friction loss divided by 2.3 (lift+total intake hose friction loss divided by 0.1) Which of the following is the equation for determining the adequacy of a small stream? - Answers AxVx7.5 (AxVx1000) Which of the following is the equation for determining net pump discharge pressure at draft? - Answers PDP+intake pressure correction The rule of thumb for evaluating pond and small lake capacity is that every 1 foot (0.3m) of depth for and area of 1 acre (0.4ha) provides ______ gpm for ______ hours. - Answers 1000 gpm (4000 L/min);5 hours Which of the following is NOT a problem with reaching a natural static water supply with a pumper? - Answers Bridges that are not tall enough to support the fire apparatus Floating strainers allow safe drafting from natural water supplies as shallow as ______ feet (meters). - Answers 1 foot (0.3m) In order to aid access to frozen ponds and lakes, barrels filled with ______ may be floated on the water's surface before the water freezes. - Answers An antifreeze solution Which of the following may NOT be used to cut a hole into the ice for the intake hose and strainer? - Answers Pike Pole Which man-made static water supply sources are underground storage receptacles that are usually found in areas that are not serviced by a hydrant system? - Answers cisterns Which man-made static water supply sources are man-made impoundments that have the same characteristics as a pond or small lake? - Answers Ground reserviors Which man-made static water supply sources are commonly found on large residential, industrial, and agricultural properties? - Answers Private water storage tanks Which man-made static water supply sources may be difficult to access due to security measures? - Answers Swimming pools Which man-made static water supply sources transport water through open canals or portable pipes? - Answers Agricultural irrigations systems Which of the following is the equation for determining the capacity of a square/rectangular pool? - Answers LxWxDx7.5 (LxWxDx1000) Which of the following is the equation for determining the capacity of a round pool? - Answers Pi x R^2 x D x 7.5 (Pi x R^2 x D x 1000) The rotary gear consist of: - Answers Two gear that rotate in a tightly meshed pattern inside a water-tight case The total amount of water that can be pumped by a rotary gear pump depends on the size of the ______ and the speed of rotation. - Answers Pockets in the gears Which of the following is one of the most common types of pumps used to prime centrifugal pumps? - Answers Rotary vane pumps In a rotary vane pump: - Answers The rotor is mounted off-center inside the housing The centrifugal pump imparts _______ to the water and converts it the the pressure within the pump itself. - Answers Velocity The operation of a centrifugal pump is based on the principle that: - Answers A rapidly revolving disk that throws water introduced at its center toward the outer edge of the disk Flowmeters must provide a readout in increments no larger than: - Answers 10 gpm (38L/min) Which of the following statements about spring probe is TRUE? - Answers It is relatively maintenance free because the spring probe is the only moving part How accurate should flow meters be when properly calibrated and in good working condition? - Answers +/-3 percent Flowmeters have a discharge readout display mounted within ______ of the valve control for each discharge equipped. - Answers 6 inches (150mm) A central flowmeter device allows the driver/operator with all of the following EXCEPT: - Answers The required pump discharge pressure needed Which of the following is NOT a flowmeter application? - Answers Pump discharge pressures If water volume at the nozzle suddenly diminishes, but there's is no reduction in the flowmeter reading, what is the most likely assumption? - Answers The hose has burst Use of a flowmeter during relay pumping makes it possible to feed a supply line without having to know the: - Answers Number of gallons flowing from the pumper receiving the water When using a flow meter for relay pumping, as the engine speed increases: - Answers The discharge and gpm (L/min) reading increase When using a flow meter for relay pumping, do not allow the incoming pressure to drop too much below: - Answers 20 psi (140 kPa) When using a flowmeter for standpipe operations, determine the number and type of nozzles connected to the standpipe, add _______ for each nozzle flowing and then pump the volume of water that matches this figure. - Answers The maximum rate of flow Manual or mechanical hydraulic calculators operated by moving a slide or dial in which the ______ is (are) indicated. - Answers Water flow, size of hose, and length of the hose lay Electronic hydraulic calculators allow the driver/operator to input all of the following EXCEPT: - Answers Pump discharge pressure Which of the following statements about hydraulic calculators is TRUE? - Answers They enable the driver/operator to determine the pump discharge pressure required to supply a hose layout without having to perform tedious mental hydraulic caluculations What is the first step in developing a pump chart? - Answers Identifying ally nozzles, devices, and hose layouts used by the department When calculating the required pump discharge pressures for each of the listed layouts on a pump chart, round pump discharge pressure to the nearest: - Answers 5 psi (35kPa) What is the hand method used to estimate? - Answers Friction loss To what size hoselines may the hand method be applied? - Answers 1 3/4 and 2 1/2 When the hand method is applied to 2 1/2 inch hose, each finger is numbered at the base in terms of: - Answers Hundreds of gallons per minute Using the hand method, determine the total pressure loss due to friction in 200 feet of 2 1/2 inch hose when a fog nozzle is flowing 150 gpm at 100 psi. - Answers 9.0 psi In order for the hand method to be applied to 1 3/4 inch hose, calculate the friction loss in 100 feet of 1 3/4 hose by going to the finger that corresponds to the flow you are using and multiplying the number at the tip of the finger by: - Answers The number at the base of the same finger To what size hoselines may the condensed "Q" formula be applied? - Answers 3, 4, and 5 inch What is the equation for determining friction loss in 4 inch hose using the condensed "Q" formula? - Answers FL per 100 feet = Q^2 divided by 5 What does the driver/operator need to know in order to use the GPM flowing method? - Answers Water flow in gpm When using the GPM flowing method for 2 1/2 inch hose, subtract ______ from the first two numbers of the gpm flow. - Answers 1 If 500 gpm is flowing from a nozzle, what if the total pressure loss due to friction for 200 feet of 2 1/2 inch hose? - Answers 100 psi When determining your own friction loss coefficients, in order to get results indicative of averages that can be expected on the fireground, it is necessary to test: - Answers The same hose that would be used on the fireground Which of the following is the equation for determining friction loss? - Answers CQ^2L When determining friction loss coefficients, departments should test: - Answers Only one type of hose at a time If testing 50-foot lengths of hose, lay out: - Answers 300 feet of hose If using a pitot tube to determine the nozzle pressure and corresponding flow of water, use: - Answers A smoothbore nozzle If using a flow meter to determine the nozzle pressure and corresponding flow of water, use: - Answers Any nozzle When testing hose, insert gauge one in the hoseline at the connection between the first and second sections of hose away from the discharge. Insert gauge two: - Answers 200 feet from gauge one How many test runs should be made for each size hose? - Answers Three to four Appliance friction loss is insignificant in cases where the total flow through these appliances is less than: - Answers 350 gpm Assume a ______ loss for each appliance in a hose assembly when flowing 350 gpm or more. - Answers 10 psi Assume a friction loss of ______ in all master stream appliances, regardless of the flow. - Answers 25 psi Elevation pressure is created by elevation differences between: - Answers The nozzle and the pump Water exerts a pressure of ______ per foot of elevation. - Answers 0.434 psi Which of the following is the equation for determining elevation pressure? - Answers 0.5H (10H) Which of the following is a way to determine elevation in a multi-storied building? - Answers 5 psi x (number of stories -1) Calculate the total pressure loss due to elevation for a hoseline operating at the top of a 150-foot (50 meter) hill - Answers 75 psi (500 kPa) A hoseline operating on a twelfth-floor structure fire is connected to the building's standpipe system. What is the total pressure loss due to elevation? - Answers 55 psi Which of the following is the most common hose lay? - Answers Single hoseline A pumper is supplying a 350-foot hoseline with 150 gpm flowing. The hoseline is composed of 200 feet of 3 inch hose with 3 inch couplings reduced 150 feet of 2 1/2 inch hose. What is the pressure loss due to friction in the hose assembly? - Answers 9.75 psi When determining the loss in equal length, multiple lines whose diameters are the same, it is necessary to perform calculations for: - Answers Only one line When the diameters of the hoselines vary, friction loss calculations must be made for each hoseline, and then set for: - Answers The highest pressure When using a wye, it is important that the attack lines wyed from the supply line are: - Answers The same length and diameter