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179 Cards in this Set
- Front
- Back
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What is the NFPA standard for Portable Fire Extinguishers
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NFPA 10
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Class A Fire
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fire involving ordinary combustibles such as wood, paper and cloth
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Class B Fire
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Fire involving flammable and combustible liquids and gases such as gas, kerosene, and liquefied petroleum gasses-hydrocarbons and polar solvents.
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Hydrocarbons
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crude oil, gas, jet fuel and kerosene (petroleum based and float on water)
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Polar Solvents
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alcohol, acetone and lacquer thinner
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Class C Fire
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Fire involving energized electrical equipment
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Class D Fire
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Fire involving combustable metals
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Class K Fire
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Fire involving cooking devices using vegetable or animal oils and fats.
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Any portable fire extinguisher that uses dry chem. or dry powder must be able to discharge _____% of its contents.
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80%
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Any portable fire extinguisher that uses water must have a min. _______ sec. discharge time.
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45-65 sec.
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Any portable extinguisher that uses agents other than dry chem. must be able to discharge ____% of its contents.
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95%
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Do Class D extinguishers receive a number rating?
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NO
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Extinguishers that use water must have a min. discharge of ___ ft. for a _____ sec. period.
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30ft. , 40 sec. period.
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Dry chem. and dry powder extinguisher must have a min. discharge range of ___ ft.
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10 feet range
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What fires are Carbon Dioxide suitable for?
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Class B and C
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Antifreeze agents are used in extingusishers that are used in temps. as low as _____ degrees.
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40 degrees
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Antifreeze agents are intended for use on ______ fires in low temps.
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Class A fires
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Carbon dioxide is stored in the extinguisher in a ________ state at _____ psi.
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liquid , 840psi.
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What is the agent in "mulit-purpose" dry chem. extinguisher.
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monoammonium phosphate
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What is the agent in Purple K?
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Potassium Bicarbonate
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Name the agent that is effective on all combustible metals?
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None
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Name the three types of portable fire extinguishers.
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Stored pressure
Cartridge operated Pump operated |
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In all occupancies, the max. travel distance to an extinghisher for Class A is...
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75 feet
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What is considered "with depth" for a flammable liquid fire.
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1/4 inches deep at least.
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Max. height for extinguishers less than 40lbs is ...
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5 feet
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Max. height for extinguishers more than 40 lbs is ...
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3 1/2 feet
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What is the min. clearance distance from the bottom of the extinguisher to the floor?
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4 inches
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NFPA states extinguisher inspections should happen when?
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Monthly
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When filling don't use a source of compressed air great than ___ psi above the operation pressure.
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25 psi.
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The hydro test pressure is _____ psi the working pressure stamped on the vessel.
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5/3 psi.
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While attacking a Class A fire, how far should you be initially with an extinguisher?
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10 - 30 feet
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When using a multipurpose dry chem. with lighter materials how should you approach the fire and extinguish it?
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10 feet from the fire and 3 feet above.
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While attacking a Class D fire, it should be covered with a ____ layer of dry powder.
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2 inch
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Can you use a water mist extinguisher for a Class C fire?
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Yes
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While attacking a Class K fire, begin application from a distance of _______ ft. away.
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10-12 feet
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Secondary Power Supply, this power supply must be able to make the detection and signaling system fully operational within ______ of the main power supply's failure.
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30 seconds
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What are the 3 basic types of basic alarm systems.
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Non-Coded: Just a signal
Master Control: Zoned: Shows Zones |
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Define: Auxiliary Fire Alarm System
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a facility that receives signals and at which personnel are in attendance at all times to respond to these signals.
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Define: Proprietary System
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Each building or area will have its own system that is wired into a common receiving point somewhere on the facility.
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Define: Central Station System
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Like a proprietary system with an off site central recieving station.
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What are the 2 types of emergency voice/alarm communications systems.
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one way and two way systems
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Pull stations should be mounted where?
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on walls or columns no less then 3 1/2 feet and no more than 4 1/2 feet above the floor.
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Rate of rise heat detectors are designed to send a signal when the rise in temp. exceeds ___degrees to ______ degrees F per min.
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12-15 degrees
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In a Pneumatic Rate to Rise Line Detector tubings must be limited to about ______ feet in length.
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1000
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In a Pneumatic Rate to Rise Line Detector the tubing should be arranged in rows that are not more than ____ feet apart and ____ feet from the walls.
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30 feet, 15 feet
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Describe how the ionization smoke detector works.
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it contais a sensing chamber consisting to 2 charged plates and a radioactive source for ionizing the air between the plates.
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What is the name of the radioactive material inside the ionization smoke detector chamber?
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Americium 241
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What is the other name for a Flame Detector?
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Light Detector
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What is the service testing for a system with lead -acid and primary (dry cell) type batteries?
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Monthly
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What is the service testing for a system with nickel-cadmium and sealed lead-acid type batteries?
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Semi-Annually
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A permanent record of all detector tests must be maintained for at least ____.
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Five years
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Test are not required until ____ years after the smoke detector has been installed.
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15 years
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If any of these systems are backup electrical generators for emergency power, those generators should be run under load monthly for at least _____.
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30 minutes
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Define: the Law of Specific Heat
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The is the measure of the heat absorbing capacity of a substance.
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Water exsists in a liquid state between what temps.
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32 and 212 degrees
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Define: BTU
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the amount of heat required to raise the temperature of 1 pound 1 degree F.
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Define the Law of Heat Vaporization
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is the quanity of heat absorbed by a substance when it changes from a liquid to a vapor.
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At 212 degrees water does what?
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expands approx. 1,700 times its original volume.
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Define: Specific Gravity
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the density of liquids in relation to water
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Define: Viscosity
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the tendency of a liquid to possess internal resistance to flow
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Liquids with a specific gravity less than 1 are what?
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Lighter than water and will float on top of it. (hydrocarbons)
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What voltage is considered "too much" for Fire Pump Service?
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600 volts
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Over ____ stories is considered a high rise.
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7 stories
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What is the most common type of metal piping for Sprinkler Systems?
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Ferrous metal
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The thickness of a sprinkler pipe is referred to as the pipe's ________.
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Schedule
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What are Copper pipings advantages over other materials?
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1. resistant to coorrosion
2. low friction loss 3. lighter weight 4. better appearance. |
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Define ESFR?
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Early Suppression Fast Responce Sprinklers
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How much water can a ESFR (Early Suppression Fast Responce) sprinkler discharge.
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Between 100 and 180 gpm.
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How much water can a standard 1/2 inch or 17/32 inch sprinkler will discharge?
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Between 15 and 50 gpm.
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What is fundamental to the effectiveness of the sprinkler?
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The Deflector Configuration
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Define: Upright Deflector Configuration
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Sprinklers designed to deflect the spray of water downward.
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Define: Pendant Deflector Configuration
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This sprinkler breaks the pattern of water into a circular pattern
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Define: Sidewall Deflector Configuration
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Designed to discharge most of its water to one side.
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Define: Water Spray Nozzles
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Designed to spray water in a specific pattern (typically conical)
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Define: Sprig-UP
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A pipe that rises vertically and supplies a single sprinkler
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Define: Auxiliary Fire Alarm System
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An auxiliary fire alarm system is defined as a facility that receives signals and at which personnel are in attendance at all time to respond to these signals.
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Lead-acid and primary (dry cell) type batteries should be inspected __________ and nickel-cadmium and sealed lead-acid types should be inspected __________.
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Monthly, Semi-annually
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Define: Atmospheric Pressure
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At sea level, the atmosphere exerts a pressure of 14.7 psi, which is considered standard atmospheric pressure.
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Define: Head Pressure
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The term head in the fire service is another way of expressing pressure. It refers to the height that a pressure can lift a column of liquid.
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Define: Static Pressure
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The water flow definition of static pressure is stored potential energy available to force water through pipe, fittings, and adapters
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Means of Moving Water
There are 3 methods of moving water in a system... |
Direct pumping system, Gravity System,
Combination System |
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Define: Circulation or Looped Line
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When a fire hydrant receives water from two or more directions, it is said to have circulation feed or a looped line.
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Define: Distributors
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Distributors- arrangement of smaller mains serving individual fire hydrants and blocks of consumers
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The recommended size for fire hydrant supply mains is at least ___ inches in diameter
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6 inches
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In high-value districts, the minimum recommended size is an ___ -inch main with cross-connecting mains every _____ feet. Twelve-inch mains may be used in long mains not cross-connected at frequent intervals.
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8 inch, 600 feet
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T or F: There should also be a valve on every branch feeding a hydrant so that each hydrant can be isolated during repair or replacement.
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True
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Valves for water systems are broadly divided into ...
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Indicating and non-indicating types.
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Two common indicator valves are the ______________ _____________.
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Post indicator valve (PIV) and the outside stem and yoke (OS&Y).
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Control valves in water distribution systems may be either ...
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Gate valves or butterfly valves.
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The most common type of hydrant in the US is the _______ type.
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Dry-barrel
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Whether they are wet barrel or dry barrel, hydrants are attached to the city main by a short piece of pipe called a ________.
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Branch
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A good rule of thumb is that there should be a hydrant at every intersection, and hydrants should no be spaced farther than ____ feet apart.
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500 ft.
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It indicates that a 500-foot separation is appropriate only where fire flow requirements are 1,750 gpm or less. A spacing as little as ______ feet is indicated where the fire flow requirements is _______ gpm or more.
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200, 7,500 gpm
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Hydrants should be flushed _________ to make sure that they work and to clean sedimentation from the pipes
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Every year
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The insurances Services Office (ISO) requires flushing a hydrant _________ for full credit
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Twice a year
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What are used to stabilize or balance the pressures on a water system at time of peak demand.
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Elevated tanks
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A fire pump is a ________ that supplies water to a fire suppression system
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fixed pump
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There should be ______ between sprinklers and stored materials. There should be ______ between ESFR sprinklers and stored materials.
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18 inches, 36 inches
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What sprinkler systems are the most reliable?
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Wet-pipe Sprinkler Systems
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The max distance between residential sprinklers is _____ ft.
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12 ft.
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The max distance of a sprinkler and a wall in a residential structure is ______ ft.
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6 ft.
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There are 2 types of split-case pumps...
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Horizontally mounted and vertically mounted
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T or F: Most horizontal split-case pumps are single-stage pumps.
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True
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The vertical-shaft turbine centrifugal fire pump was originally designed to pump water from _____.
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Wells
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Pump Drivers
Currently, there are three types of drivers that are acceptable for use with fire pumps... |
Electric motors
Diesel engines Steam turbines |
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Voltages in excess of _____ volts (AC) should not be used for fire pump service
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600 volts
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Engine Power
The engine is also required to have an over-speed shutdown device. If the governor fails to limit pump speed, this device will shut down the engine to a speed approx. _____% the rated engine speed. |
20%
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To ensure reliability, start and operate the engine of fire pumps for ___ minutes every week to ensure that it runs smoothly at the rated speed.
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30 min.
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The temperature of the fire pump room should be maintained at ______.
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70 degrees
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The Fire Pump Controller isolation switch lever is always located ________ the control panel.
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Outside
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What is the purpose of the Pilot Lamp?
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Its purpose is to indicate when power is available to the pump control panel.
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The above ground pipe in a pump installation must be constructed of _______.
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Steel
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Because 5-inch pipe is not commonly available, 6-inch pipe is the smallest size likely to be found with any pump rated at ______ gpm.
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500 gpm
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Define: Circulation Relief Valve
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This is designed to open and provide enough water flow into and out of the pump to It prevents the pump from overheating when it is operation at churn against a closed system
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Every pump is required to be provided with components for testing the installation. The most prominent of these components is the _________.
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Test manifold.
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When a pump is operating against a closed system, the pump is said to be operating at ________.
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Churn
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It is recommended that fire pumps be operated __________.
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Weekly
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Testing Fire Pumps
Both underground and above ground piping must be hydrostatically tested in accordance with NFPA 24 and NFPA 13, respectively. Both types of piping must be hydrostatically pressurized for ____ hours to either 200 psi or 50 psi above the maximum static pressure, which ever is higher. |
2 hours
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Define: Class 1 standpipe systems
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are primarily for use by fire fighting personnel trained in handling large handlines.
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Define: Class II Standpipe Systems
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These systems are limited to 1 ½ inch hose, for use of occupants only.
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The water supply for Class 1 and Class 3 standpipe systems should provide _____ gpm for at least _____ minutes.
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500 gpm , 30 min.
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Define: Class III Standpipe Systems
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Class 3 systems have both 2 ½ inch connections for fire department personnel and 1 ½ inch hose stations and connections for use by building occupants.
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For Class 1 and 3 service, the min. riser is ____ in. for building heights less than _____ ft. and ___ in. for heights over ______ft.
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4 inches, under 100 ft.
6 inches, over 100 ft. |
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When a Class 1 or 3 standpipe exceeds _____ ft. in height, the top 100 feet is allowd to be _____ in. pipe.
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100 ft., 4 inches
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Define: Manual Dry Standpipe System
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A system that does not have a permanent water supply and is supplied only through a fire department connection.
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Define: Semiautomatic Dry Standpipe System
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A dry standpipe system that is arranged to admit water into the system when a remote control device is activated at the hose stations
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Define: Manual Wet Sprinkler System
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This system is maintained full of water from a small source that is incapable of supplying the system demand. A fire department connection must be used to supply system demand
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Pneumatic Rate-to-Rise Line Detector- the tubing in these systems must be limited to about 1,000 feet in length. The tubing should be arranged in rows that are not more than ___ feet apart and ____ feet from walls.
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30 feet, 15 feet
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When one pump intakes from the discharge of another, the pumps are said to be arranged in _______.
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Series
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Pressure-Regulating Devices-
Where the discharge pressure at a hose outlet exceeds ____ psi, NFPA 14 requires a pressure-regulating, or restricting, device to limit the pressure to _____ psi. |
100 psi., 100 psi.
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Inspecting and Testing Standpipes-
The system should be hydrostatically tested at a pressure of at least _____ psi for _______ to ensure tightness and integrity of fittings. If the normal operating pressure is greater than 150 psi the system should be tested at ____ psi greater than its normal pressure. |
200 psi., 2 hours, 50 psi.
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Fire loss data reveal that automatic sprinklers have a ______% reliability factor when installed and maintained properly.
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96%
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Define: Sprinkler Head
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is that portion of the sprinkler system that senses the fire, reacts to that sense, and then delivers the water to the fire area
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Define: Frangible Bulbs
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they contain liquids that expand when heated. The expansion of the liquid within the bulb increases vapor pressure. Once a vapor pressure is reached that exceeds the strength of the bulb, the bulb breaks, allowing water to flow.
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Under conditions of ordinary room temperatures, a sprinkler with a temperature rating of _________ degrees F is most frequently used.
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135-170 degrees
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Sprinkler System Piping
The main drawback of plastic pipe is that it may not be installed in areas where the ambient temp. exceeds ____ degree F. |
120 degrees F
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Types of Sprinkler Systems-
The more common types of sprinkler systems in use today include the following: |
Wet-pipe system
Dry-pipe system Deluge system Pre-action system |
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Define: Water Columning
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If too much water enters the pipe above the valve it can exert enough pressure against the air seat to hold the valve closed. This condition is called water columning.
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Define: Pre-action Sprinkler System
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A pre-action system is used when it is especially important that water damage be minimized, even if the sprinkler pipes accidentally break.
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Define: Class 1 materials
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These products are generally noncombustible and stored on wooden pallets in ordinary packaging.
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Define: Class 2 Materials
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Also a noncombustible commodity but packaged in wooden crates or multilayered carboard cartons.
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Define: Class 3 Materials
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These commodities are made of combustible materials such as wood, paper, or certain plastics, irrespective of pallets or packaging.
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___________ sprinkler systems are the most reliable of all sprinkler systems.
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Wet-pipe
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Waterflow Alarms should be tested ___________.
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Quarterly
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According to NFPA 25, the Main Drain Test should be conducted _________.
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Annually
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A dry-pipe valve should be full flow trip tested every _____ years to ensure that the air seat has not become stuck and that the clapper valves will move freely.
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3 years
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The trip test of dry-pipe valve permits water to __________.
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Flow into the system.
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NFPA 25 states that whenever a sprinkler system or underground system has been taken out of service, a tag must be placed on the ____.
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FDC
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According to records kept by the NFPA, approximately ___ of fire fatalities occur in residential occupancies.
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80%
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The survivable conditions were considered to be the following:
1. Maximum gas temperature at eye level ? 2. Maximum ceiling surface temperature? 3. Maximum carbon monoxide concentration ? |
1. 200 degrees F
2. 500 degrees F 3. 1,500 parts per million |
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A minimum ____-minute supply is required for systems designed in accordance with NFPA 13D and a minimum __-minute supply is required for systems designed in accordance with NFPA 13R.
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10 min. 30 min.
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NFPA 13D requires only ____ gpm for any sprinkler. If there are two or more sprinklers, each requires ____ gpm as a maximum required water supply. In addition, the water supply needs only to supply this flow rate for ____ minutes.
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18 gpm, 13 gpm, 10 min.
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NFPA 13R The water supply for these larger buildings is required to supply the sprinklers for ____ minutes.
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30 min.
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The basic spacing for sprinklers in residential systems is a maximum of ____ square feet per sprinkler.
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144 sq. ft.
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The maximum spacing between sprinklers is __ feet with the maximum allowable distance of a sprinkler from a wall being ___ feet.
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12 ft. , 6 ft.
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What type of system is best suited for applications in commercial cooking hoods, plenums, ducts and associated cooking appliances.
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A Wet Chemical System
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The tanks in a Chemical Extinguishing Systems, must be located as close to the discharge point as possible, but they should also be in an area with a temperature range of ______.
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40 degrees F to 120 degrees F
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Gaseous Systems
Used most commonly on … |
Radio and TV equipment rooms
Computer Rooms Areas containing equipment of high value Flammable liquid storage and dispensing areas Printing presses |
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Total flooding systems are designed to deliver at least a _____% concentration of carbon dioxide into an enclosed area.
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34%
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T or F: Carbon Dioxide systems exist as either high-pressure systems or as low-pressure systems. The low-pressure system is for much SMALLER hazards.
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False
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Foam Extinguishing Systems
Typical locations for foam extinguishing systems include ... |
Flammable liquids processing or storage facilities, aircraft hangars, and rolled paper or fabric storage facilities.
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The foam concentrate inlet to the eductor should not be more than ___ feet above the liquid surface of the foam concentrate
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6 feet
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IFSTA defines a hand line nozzle as “an nozzle that one to ____ firefighters can safely handle that flows less than ____ gpm”
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3 FF, 350gpm
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Any Dry Chem. Exting. must use ___ % of its contense.
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80%
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Any other Exting. must use ____% of its contense.
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95%
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A portable exting. that uses water stored under pressure must have a min. ____ft. over ______ sec. discharge time.
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30 ft. 40 sec.
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What does RTI stand for?
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Responce Time Index- has to do with the time it takes a sprinkler to respond.
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Anti-Freeze sprinkler systems are limited to ____ gallons? (and why?)
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40 gallons, due to cost considerations.
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What is the standard RTI (Rapid Time Index)?
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144 ft/sec.
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What is the Fast Responce RTI?
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90 ft./sec.
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What is the distance between standpipes in a "non-sprinklered" building?
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150 ft.
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Stand Pipe Systems- Should be divided into Zones in buildings over ____ ft. high.
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275 ft.
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Class II Stand pipe system- In a building less than 50ft. what is the min. riser size?
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2 in.
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Class II Stand pipe system- In a building greater than 50ft. what is the min. riser size?
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2 1/2 in.
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What psi. is required to raise one pound of water one foot?
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0.434 psi.
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ESFR Discharge Range?
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100-180 gpm
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Standard Sprinkler Discharge GPM Range?
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15-50 gpm
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NFPA 72 requires that pull stations be placed within ____ feet of every exit.
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5 feet
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Most codes do not require manual alarm initiating devices in structures that are ____________.
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Fully Sprinklered, with a system that sounds a local alarm with water flow.
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