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80 Cards in this Set
- Front
- Back
Which class of portable extinguisher uses a nonconductive agent?
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Class C
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Which class of portable extinguisher would be suitable for a fire in a trash bin?
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Class A
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What standard is the basis for the fire extinguisher rating system?
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UL 711
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Dry chemical and dry powder extinguishers must have a minimum horizontal discharge range of:
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10 feet
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If an extinguisher is rated 60-B, what does the numeral 60 represent?
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60 square feet
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Which of the following extinguishing agents extinguishes fire primarily through a smothering action by establishing a gaseous blanket between the fuel and the surrounding air?
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Carbon Dioxide
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Which of the following is a "clean" extinguishing agent that meets EPA standards for discharge into the atmosphere?
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Halotron
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For which class of fires is the extinguishing agent NA-X especially effective?
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Class D
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What is the most common type of stored pressure extinguisher?
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APW
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The main factor in determining the distribution of fire extinguishers in a structure is the _____ .
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Type of occupancy
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An occupancy where the amounts of ordinary combustible materials and flammable liquids present are high and a rapidly spreading fire may develop is classified as ____ .
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Extra Hazard
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For which class of extinguisher is the travel distance to the hazard the primary factor in determining the extinguisher's distribution?
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Class B
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Which NFPA standard details requirements for portable extinguishers on fire apparatus?
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NFPA 1901
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What should be used for pressurizing dry-chemical extinguishers?
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Nitrogen
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If extinguisher maintenance is recorded on a collar tag, how is it affixed to the extinguisher?
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Secured to the neck of the extinguisher
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Initially, a water-based extinguisher should be used at a distance of _____ from the fire.
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10 to 30 feet
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For which of the following flammable liquids is AFFF an effective extinguishing agent?
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Kerosene
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Which of the following would be the best choice for extinguishing a fire involving sensitive electrical equipment?
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Water mist
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When attacking a Class D fire, firefighters should cover the burning material with a ____ layer of dry powder agent.
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2-inch
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The ability to form a soapy foam that prevents fuel from reigniting is ____ .
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Saponification
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Which fire alarm system component processes signals from actuating devices and transmits them to the alerting system?
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Control Unit
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Bells, buzzers, and horns are examples of _____ .
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Notification appliances
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Which typer of alarm system typically involves a company that sells its services to many individual customers?
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Central station
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Which type of automatic detector typically is slowest to activate under fire conditions?
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Heat
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Which type of testing is performed soon after an alarm system has been installed?
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Acceptance
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What two gases do fire gas detectors monitor?
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Carbon Dioxide and Carbon Monoxide
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What are the two basic types of smoke detectors in use?
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Photoelectric and ionization
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Which types of detectors are among the fastest to respond to fires but also easily tripped by non-fire conditions such as welding?
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Flame detectors
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Which alarm system component might be designed to pressurize a stairwell for evacuation?
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Auxiliary services
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Which of the following occupancies would be most likely to have a presignal alarm?
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Nursing home
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Which type of alarm system is usually connected to the dispatch center through a leased telephone line or a radio signal over a dedicated fire department frequency?
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Remote
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What is the maximum allowable travel distance to manual pull stations?
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100 feet
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Which type of pull station sends an intermittent signal that reflects its location in the system?
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Coded
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Which type of heat detection device is used to monitor a large area?
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Continuous line
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Smoke inhalation causes about _____ percent of fire deaths.
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65
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Which type of smoke detector converts a beam of light into current that keeps a switch open?
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Photoelectric
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Which type of smoke detector responds more quickly to flaming fires?
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Ionization
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Who usually is responsible for performing service tests on fire detection and signaling equipment?
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Occupants
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What is the recommended way of cleaning dust or dirt from initiating and indicating devices?
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Vacuuming
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Records of all detector tests must be maintained for a minimum of ____ years.
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5
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What is the primary way in which water extinguishes fire?
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Cooling
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What is the ratio between the amount of heat needed to raise the temperature of a specified quantity of a material and the amount of heat needed to raise the temperature of an identical quantity of water by the same number of degrees?
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Specific heat
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What is the quantity of heat absorbed by a substance when it changes from a liquid to a vapor?
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Latent heat of vaporization
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What is the density of liquids in relation to water?
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Specific gravity
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Water converted to steam occupies _____ times its original volume.
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1700
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The speed at which water flows through hose or pipe is known as ______ .
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Velocity head pressure
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Fluid pressure is _____ to any surface on which it acts.
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Perpendicular
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According to the fourth principal of pressure, the pressure of a liquid in an open vessel is proportional to its _____ .
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Depth
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What is the height of a water supply above the discharge orifice?
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Elevation head
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The stored potential energy available to force water through pipe, fittings, fire hose, and adapters is ____ pressure.
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Static
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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.
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Residual pressure
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What is the surge that results from suddenly stopping the flow of water through a hose or pipe?
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Water hammer
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Which type of water distribution system provides circulating feed from several mains?
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Grid
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What is the recommended minimum size for hydrant supply mains in high-value districts?
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8 inches
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Which of the following materials is most likely to be used in modern water distribution systems?
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Polyvinyl chloride plastic
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Which type of piping arrangement has exactly one inflow point and one outflow point and exactly two paths between the inflow and outflow points?
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Simple flow
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Which type of valve involves a hollow metal post that is attached to the valve housing?
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Post indicator
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Which type of valve do municipal water supply systems most commonly use?
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Buried nonindicating
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What characteristic makes dry barrel hydrants easy to recognize?
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Operating nut on top of the hydrant
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What is the greatest problem associated with providing fire protection water supplies from elevated tanks?
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Limited pressure available
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In a Class I standpipe system, what is the minimum residual pressure required at the most hydraulically demanding hose connection?
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100 psi
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In which type of automatic sprinkler system is pipe sizing based on the number of sprinklers supplied?
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Pipe schedule
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What is the recommended duration of water supplies for exterior manual fire fighting using flows larger than 2,500 gpm?
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3 hours
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What is the required duration of water supplies for standpipe and hose systems?
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30 minutes
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Which of the following standards stipulates criteria for installation, testing, and maintenance of fire pumps?
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NFPA 20
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The rotor inside a pump casing is called a(n)
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Impeller
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What is commonly the lowest rated capacity for fire pumps?
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500 gpm
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What is the lowest permitted pressure rating for a standard fire pump?
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40 psi
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A pump is said to be operating at ____ when it is running with all discharges closed.
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Churn
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The primary advantage of a diesel enging pump driver over an electric motor driver is that the diesel engine is _____ .
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Self-powered
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Which type of pump is used to prevent false pump starts due to pressure fluctuations?
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Pressure maintenance pumps (jockey pump)
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The aboveground pipe in a pump installation must be constructed of ______ .
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Steel
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The _____ relief valve is designed to prevent the pump from overheating when it is operating at churn against a closed system.
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Circulation
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How many pressure gauges are required on vertical turbine pumps?
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One
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In the first test point, the maximum allowable pressure for a pump to develop when operating against a closed system is _____ percent of its rated pressure.
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140
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How long should an electric motor be run during weekly pump startups?
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10 minutes
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What is the term for the curves that a pump manufacturer plots when testing a pump before shipping it?
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Certified shop test curves
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How many times in addition to the first phase must manually controlled pumps be manually started an stopped during pump tests?
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Six
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About how fast should water leak from a fire pump's packings?
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One drop every second
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How much does doubling a pump's speed increase the pressure?
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4 times
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