Free NFPA 1002 Driver/Operator - Apparatus Exam Flashcards

The visual and operational check every driver/operator performs on any apparatus, covering 12 items: batteries, braking system, coolant system, electrical system, fuel, hydraulic fluids, oil, tires, steering system, belts, tools/appliances/equipment, and built-in safety features. This is the baseline list, not the whole list for a pumper.

Three pumper-specific checks performed IN ADDITION to the 11.2.1 items, not instead of them: (1) water tank and other extinguishing agent levels, (2) pumping systems, (3) foam systems. Missing the word 'in addition' is the classic exam trap - a pumper check is 11.2.1 plus 12.3.1.

Completing the maintenance and inspection forms so every item is recorded and deficiencies are reported. It is a separate, graded JPR: a perfect walkaround with no paperwork fails the requirement, because the department's record is what proves the apparatus was verified in service.

In-service inspection, maintenance, testing, and retirement of apparatus is now NFPA 1910 (2024); it replaced NFPA 1911. Design requirements for new apparatus are now NFPA 1900; it replaced NFPA 1901. Older study guides still cite 1911 and 1901 - the technical content mostly carried over, but the document numbers are retired.

Build system pressure, then check governor cut-out and cut-in, check for leakage with the engine off and brakes applied, and confirm the low-air warning device activates. Under 49 CFR 393.51 the warning must operate at or above 55 psi. A driver/operator who ignores a slow air build or a late warning device is putting an unstoppable vehicle on the road.

Conducted at draft with a lift of no more than 10 ft: 100% of rated capacity at 150 psi net pump pressure for 20 minutes, 70% of capacity at 200 psi for 10 minutes, and 50% of capacity at 250 psi for 10 minutes. Failing any single run fails the whole test; the pump must be repaired or formally derated.

Vacuum test: the primer must pull at least 22 in. Hg with all intakes capped, and the vacuum must not drop more than 10 in. Hg in 5 minutes. Priming test: timed from primer actuation until water discharges - no more than 30 seconds for pumps rated 1,250 gpm or less, 45 seconds for pumps rated 1,500 gpm or more. A failed vacuum test almost always means an air leak on the intake side.

Driver reaction distance + brake lag distance + braking distance. Air-braked apparatus have a brake lag (roughly a half second at highway speed) that hydraulic-braked vehicles do not, so an engine needs meaningfully more room than the car in front of it even before weight is considered.

Braking shifts weight forward, accelerating shifts it rearward, and turning shifts it to the outside wheels. Braking and turning at the same time stacks both loads on the outside front tire and is where steering control is lost. Do the braking before the curve, then accelerate gently through it.

Centrifugal force in a curve grows with the square of speed, so a modest speed increase multiplies the sideways load. A loaded pumper has a high center of gravity from the water tank, so it reaches rollover before the tires lose grip. Most apparatus rollovers happen on curves and highway ramps at or below the posted speed.

Water sloshing in a partially filled tank keeps moving after the apparatus slows or turns, then shoves the vehicle in that direction. It is worst on a half-full tank. Baffles reduce surge but never eliminate it, which is why 11.3.3, 11.3.4, and 11.3.5 all list liquid surge in their requisite knowledge.

11.3.2 alley dock - back from a roadway into a space 12 ft wide requiring 90-degree right and left turns, without stopping and pulling forward. 11.3.3 serpentine - maneuver around obstructions forward and in reverse without stopping to change direction. 11.3.4 confined-space turnaround - turn 180 degrees where a U-turn is impossible. 11.3.5 diminishing clearance - judge restricted horizontal AND vertical clearances. A spotter is required for the three exercises involving backing (11.3.2, 11.3.3, 11.3.4); 11.3.5 diminishing clearance does not specify one.

With ABS, apply firm steady pressure and steer; do not pump the pedal, because pumping defeats the system's own modulation. ABS does not necessarily shorten stopping distance; its purpose is to preserve steering control during hard braking, but it does not raise the speed at which the apparatus can corner. Skids on apparatus are usually caused by too much speed for the surface, not by brake failure.

Emergency-vehicle exemptions in state law only apply while warning lights and siren are operating, and they never relieve the driver of the duty to drive with due regard for the safety of others. Lights and siren request the right of way - they do not clear the intersection. Come to a complete stop for red lights and stop signs and make eye contact before proceeding; intersections are where the majority of apparatus collisions happen.

12.2.1 is initiating the response to a reported emergency, obtaining all necessary information and relaying it promptly to dispatch. 12.2.2 is transmitting and receiving traffic accurately, completely, and within the AHJ's timeframe. Discriminating routine from emergency traffic is the 12.2.2(B) requisite skill, and evacuation signals are 12.2.2(A) requisite knowledge; 12.2.1(B) covers operating, relaying, and recording.

Seat belts must be fastened while the vehicle is in motion, so the apparatus does not move until every rider is belted and the driver/operator has confirmed it. Riding on the tailboard, standing in a moving apparatus, and donning SCBA while in motion are all prohibited practices named in the requisite knowledge.

Establish the work area with traffic and scene control devices before working, and then perform assigned tasks only inside that established, protected area. The driver/operator dismounts on the protected side, blocks with the apparatus to shield the working space, and treats an unprotected pump panel on the traffic side as an unacceptable position.

Position for the tactical need first, not for convenience: leave the front of the building for the aerial, stay uphill and upwind of hazardous materials, and stop short of collapse and overhead-hazard zones. Keep intake hose short - long or kinked intake hose costs you flow, and the closer the pumper is to the source, the more water the pump can actually deliver.

It is a nonpositive-displacement pump: the impeller adds velocity and the volute converts velocity to pressure. Air is too light for the impeller to move effectively, so a dry centrifugal pump cannot evacuate its own casing. That is why every apparatus pump carries a separate positive-displacement primer.

The primer is a positive-displacement device that pulls air out of the pump and intake hose, creating a partial vacuum. Atmospheric pressure on the water surface then pushes water up the hard suction. The pump never 'sucks' water up - the atmosphere pushes it, which is why lift is capped by atmospheric pressure.

A pump rating is a flow at a pressure: 100% of rated capacity at 150 psi net pump pressure, 70% at 200 psi, and 50% at 250 psi. A '1,500 gpm pump' means 1,500 gpm at 150 psi - it will deliver only about 1,050 gpm at 200 psi and 750 gpm at 250 psi.

Volume (parallel) position: both impellers feed the discharge side, giving 100% of rated capacity at the pressure one impeller can produce. Pressure (series) position: the first impeller feeds the second, roughly doubling pressure but limiting flow to about 50% of capacity. Rule of thumb - use volume when flowing more than half of capacity, pressure when flowing half or less and needing high pressure.

The work the pump itself is doing. From a pressurized source it is discharge pressure MINUS intake pressure - the hydrant did part of the work. From draft it is discharge pressure PLUS the vacuum reading, because the pump also lifted the water. Pump service tests are rated on NPDP, not on the discharge gauge alone.

The pump is trying to discharge more water than it is receiving, so vapor pockets form and collapse. Signs: pressure and flow stop responding when the throttle is increased, the discharge gauge needle chatters, and the pump sounds like it is pumping gravel. Cure the supply side, not the throttle side - gate back a discharge or reduce throttle until the pump recovers, then add intake capacity or reduce lift. Chasing a falling pressure with more RPM deepens the cavitation and erodes the impeller.

Pumping at high RPM with little water flowing lets water recirculate inside the casing and heat up, and the engine can overheat with no road airflow. The auxiliary cooler circulates pump water through a heat exchanger to cool the engine; the pump cooler or recirculating line bleeds hot water out of the pump. Watch engine temperature during long low-flow operations, such as standby at a relay.

A pressure surge created when moving water is stopped suddenly - a nozzle slammed shut, a discharge gate closed fast, or a hydrant snapped closed. The energy has to go somewhere, so it travels back through the hose as a shock that can burst hose, damage pump plumbing, or break water mains. Cure and prevention are the same thing: open and close every valve, nozzle, and hydrant slowly.

It dumps excess water from the discharge side back to the intake or to atmosphere when pressure rises above the set point. Engine speed does not change, so RPM stays where the operator put it. It reacts fast and never over-speeds the engine, but it wastes energy and cannot raise pressure when demand increases.

PSI mode holds a set discharge pressure by raising and lowering engine speed as lines are opened and closed. RPM mode holds a fixed engine speed and lets pressure move, behaving like a manual throttle. Use RPM mode while priming or drafting and generally while relay pumping, so pressure swings from the supply do not send the governor chasing a runaway condition.

They protect opposite sides of the pump. The discharge relief valve or governor controls what leaves the pump. The intake (suction) relief valve protects the pump, intake plumbing, and supply hose from surges arriving at the pump - a relay pumper suddenly increasing pressure or a hydrant valve opened too fast. A discharge-side device does nothing for an intake-side surge.

PDP = NP + FL + APPL +/- ELEV. Nozzle pressure, plus hose friction loss, plus appliance losses, plus elevation gain or minus elevation drop. Each discharge gets its own calculation because each has its own hose, length, flow, and elevation - one PDP does not cover two different lines.

FL = C x (Q/100)^2 x (L/100), where C is the hose coefficient, Q is gpm, and L is length in feet. Flow is squared and length is not: doubling the gpm quadruples friction loss, while doubling the length only doubles it. Increasing hose diameter is the cheapest way to buy back pressure.

1 3/4 in. = 15.5; 2 in. = 8; 2 1/2 in. = 2; 3 in. with 2 1/2 in. couplings = 0.8; 4 in. = 0.2; 5 in. = 0.08. Note the scale: 1 3/4 in. hose loses roughly 194 times what 5 in. hose loses at the same flow, which is the whole argument for large-diameter supply line.

Smooth-bore handline 50 psi. Smooth-bore master stream 80 psi. Standard fog or combination nozzle 100 psi. Low-pressure fog nozzle 75 psi. The nozzle pressure is the starting number of every PDP calculation, so the same hose lay needs about 50 psi more pump pressure with a standard fog than with a smooth bore.

GPM = 29.7 x d^2 x sqrt(NP), where d is tip diameter in inches and NP is nozzle pressure. Flow is set by tip size and pressure, so a smooth bore's gpm changes when the operator changes pressure. Fog nozzles do not use this formula - they are rated by the manufacturer at their design pressure.

A column of water exerts 0.434 psi per foot of height (1 psi per 2.304 ft). Add it when the nozzle is above the pump, subtract it when the nozzle is below. The fireground shortcut is 5 psi per floor above the first, which is the 0.434 figure applied to a nominal 10 ft story and rounded up.

Below about 350 gpm, losses through wyes, siameses, and manifolds are small enough to ignore. At 350 gpm or more, allow 10 psi for those appliances and 25 psi for a master stream device. The same 350 gpm figure is the dividing line between a handline and a master stream.

Pump into the fire department connection and build the PDP from nozzle pressure, hose friction loss in the attack line, roughly 25 psi for the standpipe system itself, and 5 psi per floor of elevation. Know the alternate supply route in advance - a damaged or obstructed FDC means supplying through an interior or exterior hose connection instead, and that decision cannot be made for the first time on the fireground.

Connect to the FDC and supply it; do not shut down the system, because sprinklers that are controlling the fire stop working the moment water is removed. Support the system at the pressure it was designed for - where that is unknown, 150 psi is the common default - and remember the FDC augments the system, it does not replace the water supply feeding it.

Static is the stored pressure with no water moving. Residual is the pressure LEFT in the system while water is flowing - read on the intake gauge. Flow pressure is the forward velocity pressure measured at a discharge opening with a pitot gauge. The gap between static and residual is what tells you how much more water the supply can give.

Compare the drop from static to residual: a drop of 0-10% means you can flow three more lines of the same size, 11-15% means two more, 16-25% means one more, and more than 25% means you should not count on any more. It is an estimate made from the intake gauge, not a substitute for a flow test.

Rated capacity at 20 psi residual: Class AA light blue, 1,500 gpm or greater; Class A green, 1,000-1,499 gpm; Class B orange, 500-999 gpm; Class C red, less than 500 gpm. Public hydrant barrels are chrome yellow. NFPA 291 is a recommended practice, so local color schemes vary - verify what your jurisdiction actually uses.

A hydrant on a dead-end main is fed from one direction only, so it starts strong and collapses quickly under flow, and two pumpers on the same dead-end main will starve each other. Hydrants on looped grid mains are fed from multiple directions and hold residual pressure far better. This is named in the requisite knowledge for both 12.4.4 and 12.4.5.

Atmospheric pressure at sea level is 14.7 psi, which supports a column of water 33.9 ft high - the theoretical maximum lift with a perfect vacuum. No pump pulls a perfect vacuum, so practical maximum lift is about 20-25 ft, and capacity falls off badly above 10 ft. Pumps are rated at a 10 ft lift; at 20 ft a pump may deliver only about 60% of rated capacity.

Measure lift from the water surface to the center of the pump intake, not to the pump panel. Keep a barrel strainer at least 2 ft below the surface and 2 ft off the bottom in at least 4 ft of water; use a floating or low-level strainer in shallow water. Secure the hard suction, chock the wheels, and set the transfer valve to volume before priming. If the pump will not prime, the cause is almost always an air leak on the intake side - a bad gasket, loose coupling, open drain, or uncapped intake.

Never let the residual intake pressure at any pumper in the relay fall below 20 psi; 20-30 psi is the working target. Below 20 psi the receiving pump can cavitate and large-diameter supply hose can collapse and be drawn against the intake. When the source pumper's intake reaches 20 psi, that relay is at its limit - add a pumper or another supply line.

Put the largest-capacity pumper at the water source, because it moves the most water. Keep pump discharge pressure within the supply hose's working pressure. Use a discharge gate as a dump line so water keeps moving when attack lines are shut down, and start and stop the relay gradually - abrupt shutdowns are how relays produce water hammer.

Sustained flow depends on three things: fill-site rate, dump-site rate, and round-trip travel time - never on tank size alone. Adding a bigger tanker without fixing a slow fill site buys almost nothing. Shuttle capability is measured in gpm delivered to the fireground; NFPA 1142 covers rural water supply planning.

Class A foam is a wetting agent for ordinary combustibles, proportioned at roughly 0.1% to 1.0%. Class B foam is for flammable and combustible liquids at 1%, 3%, or 6% depending on the concentrate and fuel. Class A concentrate on a Class B fire will not build a vapor-sealing blanket, and polar solvents require an alcohol-resistant concentrate at its own rate.

The eductor uses the venturi principle: water speeding through a restriction creates a low-pressure area that draws concentrate up the pickup tube. Most in-line eductors are rated at 200 psi inlet pressure, and the eductor's metering setting, the concentrate, and the nozzle's rated flow must all match. Foam solution is not finished foam until it is aerated at the nozzle.

Everything downstream of the eductor - nozzle pressure plus friction loss plus elevation - must stay under about 65% of the inlet pressure, or eduction stops. At 200 psi inlet that budget is 130 psi, so a 100 psi fog nozzle leaves only 30 psi for hose and elevation. This is why foam lines are kept short and why a lower-pressure nozzle buys usable hose length.