P&A Flashcards
The maximum loading for any unsupported aerial device occurs when operated at angles between ___ and ___ from horizontal.
70 and 80 degrees
Ranging from ________ Watts, portable lights are advantageous during incidents where illumination is needed some distance away from a piece of apparatus or additional lights are required.
300-1000 watts
There are _____ locations in the US where there is less than 100 feet following the railroad tracks. These sites account for an average of ____ accidents annually
19,824. 122
1 inch of mercury creates the same pressure at the bottom of the container as ____ inches of water
13.55
Pumps rated greater than ____ GPM capacity may require more than one large intake connection at each location.
1500
Tenders featuring pumps of ___ or greater are often called pumper/tenders.
750 gpm
Fluoroprotein foam may be made alcohol resistant with the addition of ____
Ammonia salts suspended in organic solvents
Most structural and wild man suppression operations conducted with CAFS use an air flow rate of ____
.5-1 cubic ft/min
Normal hydraulic pressure is from ___-___ psi
850-3000
Detachable ladder pipes are typically limited to flows of less than ____
750gpm
Some apparatus are equipped with banks of lights mounted on booms that are powered by electric, pneumatic, or hydraulic systems. These installations generally have a capacity of ____ to ____ watts per light.
500-1500
Specific gravity of methylene chloride (from chart page 168)
1.33
Many power-operated transfer valves operate at pressures as high as ____
200 psi.
Although they may vary in size, cisterns typically range from ___ to ___ Fallon’s
10,000-100,000
Water storage receptacle that is usually underground and may be supplied by a well or rainwater runoff.
Cistern
Pressure loss or gain created by changes in elevation between the nozzle and pump.
Back pressure
Installed in-line eductors are most commonly used to proportion ___ foam
Class B
When used on a fire line, durable agents are often applied at ___-___ percent. For structure protection, the application ratio is __-__ percent.
1.5-2
2-3
Pneumatic systems require anywhere from ___-___ psi air pressure for the PTO to be operated, depending on the manufacturer.
50-140
Definition – loads that involve motion; includes the forces arising from wind, moving vehicles, earthquakes, vibration, falling objects, or the addition of a moving load force to an aerial device or structure.
Shock loading
Most constant flow nozzles feature a ________ stream and are equipped with an adjustable pattern range
Periphery Deflected
Definition – a component of the powertrain that receives torque from the engine and converts it to rotation to the wheels. A clutch is used to disengage the transmission from the engine to allow the apparatus to start, stop, or change gears to maximize engine performance.
Manual shift transmission
To create an effective fire stream a lift of no greater than ___ feet is recommended. Working with this lift the pump operates at about ___ percent of its rated capacity.
20, 60%
Agricultural irrigation systems in some jurisdictions may flow in excess of _____ gpm.
1000
Def - Theoretical safety zone that surrounds the center of gravity on an aerial apparatus
Gravity circle
_______ converts the mechanical energy of the vehicle into heat by compressing the engine intake air and then discharging the pressure to the atmosphere through the exhaust.
Engine compression brake
An _______ brake has no impact on engine temperature
Engine compression
_____ is an electronically actuated mechanical system added to the engine valve train.
Engine compression brake
________ is either mounted in the driveline, or supplied as an integral part of the rear axle
Electromagnetic retarder
________ will experience some loss of effectiveness at high temperatures
Electromagnetic retarders
A _______ uses the viscous property of the automatic transmission fluid to retard the driveline.
Transmission output retarder
_____ is integrated into the ABS
Roll stability control
Featuring a stream of fast moving, fine spray, high pressure fog nozzles may use ______
An Impinging stream.
In modern apparatus the use of ______ is confined to small capacity booster type pumps, low-volume high-pressure pumps, and priming pumps
Rotary pumps
Hinged valve that permits the flow of water in one direction only.
Clapper valve
Check valve is automatic valve.. longer def with example
If 2 1/2 inch pipe is used with 90° bends and T fittings the flow may be limited to ___ GPM. Whereas if 3 inch pipe is used with a straighter piping route a flow as high as ___ GPM is possible through one of these intakes which may also be used as auxiliary drafting points.
250
450
Device that injects the correct amount of foam concentrate into the water stream to make the foam solution.
Foam proportioner
Portable proportioning device that injects a liquid such as foam concentrate into the water flowing through a hose or pipe.
Eductor
Many modern Fuels including gasoline are blended with up to ___% solvent additives. Treat these products as _____ during emergency operations
15
Polar solvents
Foam concentrate tanks on municipal fire apparatus generally range from ____ gallons while foam pump or tenders may carry _____ gallons or more of concentrate.
20-200
8000
Expansion ratios for most fog nozzles are in the ___ up to ____ range.
2:1 up to 4:1
There are two basic types of medium and high expansion foam generators: _____ and _____
Water aspirating and mechanical blower
Pump capacities larger than 750 GPM increase in increments of 250 GPM with most municipal fire department operating pumpers of ____ gpm or less
2000
The midi pumper has a fire pump with a rated capacity generally not greater than_____
1000 gpm
Fireboat master streams excess of ____ GPM
10,000
Capacities still 50,000
All Fire Apparatus training and testing should follow NFPA _____
Nfpa 1451 standard for fire and emergency service vehicle operations training program
Any pressure less than zero is called vacuum and absolute zero pressure is called a _____
Perfect vacuum
In modern apparatus, the use of ____ is confined to small capacity, booster type pumps; low volume, high pressure pumps; and priming pumps.
Rotary vane pumps
Pumps used in the fire service constructed with a single impeller are referred to as single state centrifugal pumps. These may consist of front mount, power take off, auxiliary engine driven, and midship pumps that use a single intake impeller and a simple casing to provide flow capacities up to ___ gpm
2250
The ____ provides a relative indication of battery condition, and the ____ indicates the status of the vehicles alternator and charging system.
Voltmeter
Ammeter
The ____ cooler is inserted into one of the hoses used in the engine cooling system so that the engine coolant must travel through it as it circulates though the system.
Marine
Load the hose with ___ coupling to come out of the bed first when using hose with threaded couplings for a reverse lay.
Male
The ability to overcome losses in pressure is limited to ___
Atmospheric pressure at sea level.
Percent drop
Static - residual (100)
________________________
Static
1-10 3 times amount delivered
11-15 2 times amount delivered
16-25 Same amount as delivered
25+ 0 additional
_________ can be calculated by determining the actual atmospheric pressure of an area and multiplying that number by the water’s pressure per square foot while it is in the intake hose.
Theoretical lift
Adjustable intake relief valve set ___ psi above static pressure of water system or above discharge pressure of previous pumper in relay.
10
Foam concentrate tanks on municipal fire apparatus generally range from 20-200 gallons while foam pumper or tenders may carry ____ gallons or more of concentrate.
8,000
Some master stream foam nozzles are capable of delivering ____ gpm
14,000
Installed in line eductors are most commonly used to proportion ____ foam.
Class B
A foam solution _______ test ensures the quality of a foam solution after it has been created by a foam proportioning system.
Refractivity
____ testing is used to ensure the quality of synthetic based foam produced by various foam proportioning systems and equipment.
Conductivity
Two types of pre-piped waterway systems: ___ and ___
Bed ladder systems and telescoping waterway systems
___ represent the overall PLANS needed to successfully mitigate an emergency and terminate an incident.
____ are the actual PROCEDURES and ACTIONS taken to successfully carry out strategies.
Operational strategies
Tactics
Specially designed woodland apparatus are often mounts on____ or larger chassis, usually featuring all wheel drive.
One ton
_______ foams are applied to roofs in two forms. 4x8 sheets or foamed in place.
Urethane isocyanate
