Mobile Pump Operator (MPO) Practice Exam

These questions are part of the practice quiz. Start practicing

• What is a common troubleshooting action for a pump that fails to operate correctly?
• What is the appliance friction loss for a Blitzfire using a 1 1/2" tip?
• Which component is essential for ensuring draft capability in a pumping operation?
• Which of the following cannot be a method to increase available water?
• Does the blue dot on the MDC show you the exact address you are responding to?
• Which of the following is an important factor when choosing a nozzle for a high-rise pack?
• What is the minimum pressure to which an SCBA cylinder must be filled?
• In high-rise firefighting, what is the main concern with falling glass?
• When should tires be replaced according to the measurement in two adjacent main grooves?
• To start the engine, what position must the transmission be in?
• Using a Blitzfire monitor, what is the appliance friction loss when using the standard operating procedures for a 1" tip?
• What is the purpose of the primer vent line hole?
• What should firefighters prioritize when encountering obstacles in high-rise firefighting?
• What type of nozzle is recommended for using Class B foam effectively?
• If a pump operates above its maximum rated capacity, what is likely to occur?
• How far from the working block should you position yourself when providing an upstream block at an accident scene?
• Is it possible for a pump rated at 1000 GPM to pump more than 1000 GPM?
• True or false, drafting from the rear intake will normally allow the MPO to flow the full rated capacity of the pump.
• What is the maximum speed allowed during an emergency run?
• At what pressure is rated pump capacity typically achieved?
• When is it appropriate to close all drains and valves in the priming process?
• As a driver, how can you assure that all personnel are belted?
• Once prime has been achieved, what should be done before opening the discharge to supply the attack line?
• Is it true or false that in cold weather, a diesel engine at idle speed is sufficient to maintain a normal operating temperature?
• What additional precaution should be taken during equipment checks?
• What component collects the water and confines it in order to convert the velocity to pressure?
• How should you treat the supply of a truck with a pump if you are supplying it directly to their pump?
• On what day is monthly maintenance typically conducted?
• What key factor should be considered regarding the deployment of supply line?
• What does the red button on a headset indicate?
• What is the diameter of the tip on the smooth bore nozzle used on the CFEMS high-rise pack?
• When should the Class A foam system be turned off during firefighting?
• How much friction loss does a standard master stream appliance typically incur?
• Is it true or false that you can list multiple problems or issues on one apparatus work order (AWO)?
• When should the air tanks of the unit ideally be bled?
• What is the correct nozzle pressure for a deck mounted or traditional portable master stream fog nozzle?
• When flowing multiple lines with varying pressures, what should you set your PDP to?
• What is the maximum GPM flow from the Blitzfire monitor?
• What is the expected blocking angle when blocking an accident scene on the roadway?
• What causes a loss of prime or draft in a pump?
• What is the primary function of the bleeder valve in a pump system?
• What is the nozzle pressure for a standard master stream with a fog nozzle?
• What is the minimum amount of time a diesel unit should idle before shutting down?
• What type of foam should be used on polar solvents?
• Which unit is normally responsible for hooking up to a sprinkler/standpipe connection upon arrival?
• During non-drafting pump operations, is it necessary to use the primer to evacuate air from the pump?
• True or false: For accurate calculations of available water, the tank fill valve should be open.
• True or false: A soft or flabby intake hose when squeezed indicates a reduction in intake pressure or volume.
• What is the correct pressure to deliver 175 GPM in 200 feet of 1.88" hose using a fog nozzle?
• If the Siamese connection for the standpipe is damaged, how can the MPO supply the system?
• What is the term used for an oil-less primer?
• What is a precaution when using automatic nozzles?
• What is the function of oil in rotary gear and vane type primers?
• What should an MPO do to verify the condition of a tire with an LED tire cap?
• What is the correct RPM range needed for priming a pump?
• What is the flushing process required after using foam on a fire scene?
• What is the required minimum level of fuel in the unit?
• Which part is NOT typically used in a pump to increase pressure?
• What should be checked when assessing the functionality of an SCBA?
• What happens if the intake relief valve is set incorrectly?
• True or false, the fire engine's onboard air system may be used to recharge a water extinguisher?
• Should automatic nozzles be lubricated?
• When should the driver check to ensure that the unit is fully stocked and operational?
• True or false: All discharges on CFEMS engines are supplied by the foam pump.
• Drafting from greater than 10' of lift will cause the rated capacity of the pump to _____.
• What is the friction loss for two standard CFEMS high-rise packs operating on the 5th floor, supplying from dual 3" lines of 100' each?
• What should an MPO do if they notice an unusual decrease in pressure during operation?
• When is batch mixing recommended for foam application in fire operations?
• What is the name of the information plate on the pump panel that contains specific information about the pump and its rating?
• What is the most critical factor when assessing the need for additional water supply in high-rise firefighting?
• How does the safety shut off valve on the Blitzfire monitor work?
• Why is it crucial to communicate the psi needed at the truck intake during the supply operation?
• What is an unacceptable way to increase your available water?
• What should a driver do in response to a low air warning signal when the engine is first started?
• What changes should be made to the gate-down pack prior to using it as a high-rise pack?
• What initial troubleshooting measure should be taken if a non-PUC engine fails to go into pump mode?
• Which of the following are indicators that the pump is in gear?
• What RPM does the high idle feature set the engine to?
• Which of the following gases is considered highly explosive when present in air?
• Will a large diameter intake on the rear of the unit deliver as much water as a large diameter side intake?
• True or false: In throttle control mode, the pressure governor provides pressure protection.
• What type of primer fluid is used by CFEMS?
• Should all air be bled out of the unit air tanks to eliminate contaminants?
• How does Class A foam assist in fire suppression?
• Is it acceptable to mix Class A and Class B foam?
• What should a driver do if they notice a flashing red light in the cab?
• What are the two main parts of a centrifugal pump?
• What action should be taken if the engine is found to be overheating?
• Once prime has been achieved, is it necessary to continue flowing water to maintain the draft?
• True or false: The load manager should be turned off when idling for extended periods of time.
• What is the maximum operating pressure of forestry hose?
• Which method can help reduce or eliminate a whirlpool forming above a strainer?
• What is a crucial factor in maintaining a pump's efficiency during a drafting operation?
• Which of the following is NOT a reason for checking the parking brake operation during troubleshooting?
• Rubber nitrile LDH is tested to what PSI?
• How can a driver safely respond to a low air pressure warning during operation?
• What is the approximate fire stream reach in a low-pressure setting?
• What should you do when you come upon a school bus with its lights flashing and children unloading?
• Which type of nozzle can be shut down and separated at the bale?
• Which of the following would not require a specialty shop work order?
• Is a solid bore nozzle suitable for aerating Class A foam?
• What should be done if air is introduced into the pump during operation?
• What is the maximum depth that Insta-Chains can be used?
• Is alcohol considered a hydrocarbon solvent?
• What is the lift and distance used to achieve engine ratings at a draft?
• What is the primary benefit of using a low level strainer during drafting operations?
• In the context of pumping operations, what does GPM stand for and why is it important?
• How is the vacuum reading on the compound/intake gauge measured?
• True or False: You can only activate the high idle feature from the switch inside the cab.
• What condition arises when water is discharged faster than it enters the pump, potentially causing damage?
• Do you need to check tire pressure with a gauge when using LED tire caps?
• Do helicopter pilots appreciate it when you use a hand light to "wave them in"?
• At what point on the engine is lift measured?
• At what GPM will one start to encounter a measurable friction loss in 5" hose?
• True or False: The MPO can increase pump discharge pressure to overcome a PRV/PRD.
• True or false, if the primer pump falls, it is still possible for the MPO to prime the pump and pull a draft.
• True or false, to ensure that a dry hydrant is properly back flushed once connected, you should open your tank-to-pump until all the water flows from your booster tank.
• Which pressure is needed at the inlet when flowing 1500 GPM's to Truck 3 through 100' of 5" hose with a hydrant pressure of 55 psi?
• Do polar solvents mix with water?
• What type of hose lay is suitable when the water source is past the incident location?
• True or false, your pressure governor should be set to pressure mode while obtaining a draft.
• In foggy weather, is it advisable to use fog lights instead of headlights due to reduced glare for the driver?
• What is a potential problem during the priming process?
• What kind of work does not typically require a specialty shop work order?
• What is the maximum GPM flow through the foam educator?
• What type of hose lay should be used if the incident is within 1200 feet of the water source?
• What is the minimum safe residual water pressure for pump safety?
• What is the significance of the 10-20-30 rule in calculating available water?
• Is it true or false that if the engine coolant level is low, you can fill with coolant from station stock?
• How is pump capacity rating typically obtained?
• What is an effective way to signal readiness to receive water?
• What is the primary function of the impeller in a pump?
• When driving a unit equipped with ABS, should you pump the brakes when stopping suddenly?
• Why should there be some sort of support under the drafting hose in a pond?
• Using the 10-15-25 rule, how do you calculate the available water for a static pressure of 80 PSI with a residual pressure of 73 PSI while flowing 300 gallons?
• How far past the hydrant should the MPO stop to wrap the hydrant for a forward lay?
• What indicates that the pump has been successfully primed?
• True or False: If the fire pump is providing sufficient water and pressure to a sprinkler system, the department apparatus should pump into the system.
• If a truck operator needs 165 psi at the inlet while flowing 1500 GPM's, what is the calculated friction loss when using a hydrant pressure of 55 psi?
• When should a second engine be inserted into 5" relay operation?
• What is the maximum distance between the foam educator and nozzle?
• What gas must be present in adequate quantities for the multi-gas atmospheric monitor to accurately test for other items?
• What is the impact of igniting vapors from a fuel spill on foam effectiveness?
• Your engine is supplying the FDC at a high-rise building with dual 3" lines, 50' in length. What is the friction loss for two standard high-rise packs on the 7th floor and one on the 6th floor?
• What primary factor affects friction loss in hose lines?
• What is the appliance friction loss that must be included for a Blitzfire monitor when flowing over 350 GPM?
• Using the 10-15-25 rule, if the static pressure is 65 psi and residual pressure is 57 psi while flowing 400 gallons, what is the available water?
• What two factors must be considered when calculating friction loss in the supply line to the Siamese connection of the sprinkler/standpipe system?
• What is the primary concern when connecting multiple hoses in a relay system?
• What should you consider when deploying supply line?
• Your engine is supplying the FDC at a high-rise building with dual 3" lines, at 100% length. What is the friction loss for four standard CFEMS high-rise packs on the 8th floor?
• What ratio is considered a safe mixing practice when using different types of foam?
• What role does the second arriving engine typically serve in high-rise operations?
• When preparing to draft, the MPO should ensure that the tank-to-pump is open before removing a relief valve or other appliance from the large diameter intake.
• Can one person use the manual pump shift override on a CFEMS PUC to place the pump in gear?
• True or false, drafting using the "cheat method" uses booster tank water in addition to the primer to fill the air space in the pump while the vacuum is being pulled.
• How frequently should units be checked for operational readiness?
• What level should the booster tank be maintained for optimal performance?
• True or False: A fog nozzle is the best choice for a high-rise pack.
• What type of auxiliary braking system uses transmission fluid in its operation?
• Which tip size is not carried for use with the Blitzfire?
• During the daily check, is it common to adjust the intake relief valve to a desired setting?
• What is the recommended parked engine RPM speed for a mobile pump operator?
• When suppling to a truck using a 5 inch line, if the required pressure exceeds the hydrant’s psi, what should you do?
• What position should the MPO assume at a mass casualty incident?
• How can a mobile pump operator determine if the pump is overheating?
• What is the minimum pressure needed for the 10-20-30 rule calculation?
• Which valve is located on an intake and prevents air from entering the pump as the line is charged?
• Every how many feet of RIC line is marked with knots and a ring?
• What is the expected flow from a high-rise pack?
• What is the county standard GPM for a 1.88 inch attack line?
• Which method provides the most accurate check for transmission fluid during weekly maintenance?
• When supplying Truck 12 through 100' of 5" hose with a 2" tip, what is the friction loss if they need 170 psi at the inlet and hydrant pressure is 65 psi?
• Should the driver/MPO check on outstanding work orders during weekly maintenance?
• What should be done when engine coolant level is confirmed low?
• What type of firefighting equipment is primarily used in high-rise buildings?
• Should the MPO expect the rated capacity of the pump if drafting with greater than 10 feet of lift?
• How many gallons per minute (GPM) should the MPO account for the RIC line when calculating available water?
• True or false: Cooling down the brakes with a garden hose after a call is recommended.
• Using the 10-15-25 (percentage) rule, calculate the available water for a static pressure of 25 PSI and a residual pressure of 20 PSI while flowing 300 gallons.
• If all factors influencing a pump's discharge pressure remain constant, what will happen to the pressure as the volume of water being flowed increases?
• What happens if the onboard foam pump is non-functional?
• What does a properly functioning intake relief valve help to avoid?
• How do you calculate the friction loss for dual supply lines?
• What equipment is included in a standard high-rise pack?
• What does a positive pressure indicated by the master gauge signify?
• True or false, if the Siamese connection for the standpipe is damaged, the MPO will be unable to supply the system?
• Which of the following indicates that a compartment door may be open?
• What is the implication of having a TRV light on while operating the pump?
• What is the friction loss for a standard master stream appliance?
• What appliance can be used to move water from one portable pond to another?
• What is the diameter of the steamer connection on Chesterfield County hydrants?
• True or false: The 10-15-25 rule can be used to calculate available water when drafting.
• What is the percentage of AFFF foam recommended for a hydrocarbon fire?
• What is one reason rotary gear and vane type primers contain oil?
• How much available water in gallons can be calculated using the 10-20-30 rule with a static pressure of 75 psi, residual pressure of 60 psi, and flowing 700 gallons?
• What is the maximum speed allowed in an active school zone during an emergency run?
• What is the maximum speed allowed when traveling in the on-coming lane of travel under emergency conditions?
• Should the unit be parked on an incline to check fluid levels?
• In the case of a low water pressure area, how should the operations be adjusted?
• When using stacked tips on the Blitzfire, what is the accurate statement about pressure and flow volume?
• What is the purpose of a break-away nozzle?
• What is the purpose of checking the fuel level before starting a shift?
• What is the friction loss coefficient for 2 ½" hand lines flowing 250 GPM?
• When is the most accurate time for the MPO to record the static pressure?
• You are supplying Truck 7 through dual 3" lines to their rear inlets, and the truck needs 165 psi at the inlet. If your hydrant pressure is 45, what is the friction loss calculation?
• Which types of foam do CFEMS engines carry?
• On what day should all new maintenance sheets be put into use?
• What is the primary purpose of an auxiliary braking system in a mobile pump unit?
• Is it true that a low air warning signal indicates the unit should be moved immediately?
• What critical information must the engine MPO receive from the truck operator when supplying a truck without a pump?
• Should you manually pull out an auto-eject shoreline to assure it is released from the unit?
• When is foam considered necessary in a fire operation?
• When must a Uniform Traffic Summons be reported through the chain of command?
• What is the minimum air pressure required for the rear brakes to function on a fire apparatus?
• What situation is Class A foam ineffective in?
• Can Class A foam be used on Class B fires?
• What is the effect on friction loss in a 5" hose when flowing below 500 GPM?
• What are two primary factors for choosing a static water source?
• True or False: Your pump can routinely exceed rated capacity when connected to a hydrant.
• If you are supplying Reserve Truck 14 through 100' of 5" hose with a hydrant pressure of 75 psi, how do you calculate friction loss if the GPM is unknown?
• What is the primary role of a multi-gas atmospheric monitor?
• Using the 10-20-30 rule, what is the available water in gallons for a static pressure of 55 PSI and a residual pressure of 43 PSI while flowing 800 gallons?
• Why is foam used in firefighting?
• Why is it important for RIC lines to have markings every 25 feet?
• What is the rated working load for fire department ground ladders?
• If air pressure falls below 40 psi, what happens to the brakes?
• What should the engine RPM be maintained at for proper priming?
• If the safety shut off valve on the Blitzfire monitor has activated, what is the correct procedure?
• Should the ignition do a "prove out" prior to starting the apparatus?
• Should a relay engine MPO gate back a 3" supply line to reduce extra pressure to the fire attack engine?
• Why is it important to ensure a pump is not under-pressurized during operation?
• During drafting operations, what is the main purpose of maintaining strainer elevation above the pond bottom?
• What is one function of Class B foam?
• What is the recommended concentration of foam for exposure protection by CFEMS?
• True or False: The engine cooler valve should always be in the open position.
• At what GPM flow would the MPO need to add friction loss in an appliance?
• Using the 10-20-30 rule, if the static pressure is 60 psi while flowing 600 gallons, what is the available water in gallons?
• What is the recommended concentration of foam for extinguishing a house fire?
• How much foam is added to a water extinguisher?
• What is the pump pressure for supplying the sprinkler system for a building with smoke or fire showing?
• What is the pump pressure for supplying the sprinkler system for a building with no smoke or fire showing?
• What is the appliance friction loss for a Blitzfire using a 1" tip?
• True or false, a line that is deployed and charged, but not flowing water does not affect your available water.
• What is the nozzle pressure for a Blitzfire straight tip?
• What is the nozzle pressure for a standard master stream straight tip?
• Why is it important for the MPO to close the tank fill valve during calculations?
• What term is used to describe a fire stream that is too large to be controlled without mechanical aid?
• What should an MPO do when calculating available water for RIC?
• True or False: If the "Stop Engine" light comes on, you should consider this just a recommendation and continue pumping until the incident is resolved.
• What is the minimum engine pressure needed for a single CFEMS high-rise pack operating on a standpipe at grade?
• What is the maximum pressure that should be pumped to a standpipe if the MPO is unfamiliar with the standpipe maintenance?
• How long can you prime using an oil-less primer as long as your engine is running?
• What is the primary purpose of calculating friction loss when supplying trucks with water?
• How often should the manual pump shift override be tested?
• What is the ideal action if your pump begins to cavitate?
• What happens if you do not reset the safety shut off valve on the Blitzfire monitor?
• True or false: There is no need to bleed the air tanks on units equipped with air dryers.
• When charging a supply line, what is the primary concern regarding air?
• What should a driver do upon activation of the open compartment door sensor?
• Which gases are measured by a multi-gas atmospheric monitor?
• What should be done before changing settings on a pump during a routine check?
• What is the best method to check the water level in the booster tank?
• You are supplying Truck 9 directly into their pump with a flow of 1000 GPM. If the hydrant pressure is 50 psi, what is the calculated friction loss?
• What is the county standard GPM for a 2 ½" attack line?
• Where do you start when back flushing?
• What is the primary purpose of a Pressure Reducing Valve (PRV) in a fire protection system?
• True or False: One person can place the pump in gear using the Manu Pump Shift Override on a CFEMS traditional mid-ship mounted pump.
• How long should the priming process last for primer pumps rated over 1250 GPM?
• What occurs if the discharge pressure is too low?
• What is the maximum inlet pressure allowed for a Blitzfire monitor?
• What type of information can be found on a pump's nomenclature plate?
• What is one method for cooling an overheated pump?
• What forms must be completed when equipment is damaged?
• You are supplying Truck 14 to their rear inlet through dual 3" lines, 100' in length each. What is the friction loss if the truck operator needs 190 psi at the inlet and the hydrant pressure is 60?
• What action should an MPO take if the water surface level in a pond is too low for effective drafting?
• What is a standard method for signaling that you are ready to receive water?
• What should be monitored to ensure the effective operation of vehicle brakes?
• For primer pumps rated less than 1250 GPM, what is the maximum duration of the priming process?
• Which action is NOT an appropriate response to an overheating pump?
• What appliance can be used to draft the most water out of a portable pond?
• What does the red plastic end of the kernmantle rope indicate?
• What is another name for an auxiliary braking system that limits or removes compression from the pistons?
• What characterizes the indication of a properly functioning bleeder valve?
• Should an auxiliary braking system be used while driving in inclement weather for better stopping?
• In a high-rise situation, what is critical to maintaining water supply?
• At what point is it acceptable to refill the DEF tank?
• Length of pipe, fire department connections and the ______ are the three components that make up a dry hydrant.
• What is the nozzle pressure required for efficient operation of a Blitzfire monitor with a straight tip?
• True or false, if a whirlpool forms over the strainer, air may be pulled into the hard sleeve, preventing, or losing the draft.
• What is a characteristic of Class A foam in relation to fire types?