firetech 10/28/19
_________ sample air as it moves through the air distribution ductwork. if smoke is detected it can shut down the unit and close and smoke dampers
air sampling smoke detectors
what operates when the pressure setting either rises above or drops below a preset pressure threshold
alarm pressure switch
which type of signal should spur occupants to immediately leave the building call the fire department or take other appropriate action to ensure life safety
alarm signal
all inspection tests a certification of new public and private water lines including visual inspection of materials and securing methods hydrostatic testing line testing and disinfection are usually handled by the
approving authority
in which stage of the NFPA code development process is a notice of intent to make a motion filed if someone is not satisfied with the results of the second draft report
association technical meeting
data compiled by the nfpa between 2007 and 2011 revealed that certain occupancies equipped with _________ had an average fire loss that was between 31 and 76 percent less than properties without these systems
automatic fire sprinkler systems
which of the two types of stationary fire pumps creates pressure by drawing water into the center of a precision manufactured disk shaped piece of metal called an impeller
centrifugal type
________ are used to prevent water from flowing out of the fire protection system back into the water supply system
check valves
which stand pipe classification combines two of the different classes and can be used by occupants and fire fighters or fire brigade members
class 3
________ fires involve energized electrical equipment so the choice of extinguishing agents must be appropriate to minimize potential danger to those involved in fighting the fire
class c
which class of fire involves combustible metals and dusts that are generally extinguished using a dry powder extinguishing agent
class d
which type of fire involves cooking appliances using combustible vegetable or animal oils and fats
class k
_________ are a system of rules, regulations, or laws that are usually put into effect by government and have statutory authority to be enforced
codes
_________ is a chemical reaction in which a combustible material and an oxidizing agent produce heat or energy and other products that promote a self sustaining process
combustion
of the different methods of heat transfer which is the transfer of heat from one body of material to another by direct contact
conduction
which of the following forms of heat transfer occurs from one body to another through a medium such as a liquid or gas
convection
there are many ways to describe the technology used with state of the art fire alarm control panels. which of the following is NOT one of the terms used to describe this technology
conventional
when having new construction done in an existing building, what must be followed in the area of the building where the construction is taking place
current code requirements
visible appliances produce the flashing lights that can be seen when a fire alarm system activates, they are used primarily for people with which type of disability
deaf
the main purpose of the model code organization has always be to ________ building fire mechanical plumbing electrical and other related code standards and recommended practices independent of the influence affiliation and pressure exerted by special interest groups
develop and maintain
the international code council and the NFPA devote all of their time and effort to the _____. making it cost effective for governments to adopt model codes
development process
this type of fire is the most recognizable, can be seen by lighting a match and requires the presence of a combustible gas because the visible flame is a gaseous reaction
diffusion flame
which of the following is NOT a primary determination for whether fire protection systems are required
distance to the closest firehouse
of the different piping used to make a supply network which type of piping supplies a number of smaller areas within the system
distribution mains
aside from protecting human life, why would a building owner install a fire protection system to protect the structure and contents
doing so makes good business sense
which of the following hydrants is designed for use in cold climates where freezing is a problem
dry barrel
the effect of convection is directly influenced by the size and shape of the
fire compartment
which type of lines tap off distribution lines and directly connect to the water based fire protection system or hydrant
fire mains
which heat detector operates when a sensing element within the detector reaches a predetermined temperature
fixed temperature heat detector
in this transition stage the temperature in a room or space reaches a point at which all of the surfaces of the room or space simultaneously ignite, immediately leading to full room involvement
flashover stage
once the standpipe system is ready for service which of the following is conducted to ensure that the required flow and pressure are available
flow tests
what needs to be done before a standpipe system is connected to any water source and should continue until the water flow is clear
flushing
which commonly used suppression agent can cover leaking fuel so that oxygen cannot reach the fuel
foam
at which stage will a fire survive by consuming the air and materials necessary to generate the flammable gas and sustain combustion
free burning stage
if the standpipe system has an automatic water supply a ________ should go to the exterior of the building and provide a means to safely remove the system water so it will not be a hazard
main drain
which initiating device requires a person to pull a handle on the device to initiate an alarm
manual fire alarm box
a ________ lined hose must be installed into hose cabinets must not exceed 100 feet in length and may be collapsible or non collapsible
1 1/2 inch
at the time of the origin of the NFPA in 1895 there were ________ different fire sprinkler system design and installation standards _______ within _______ miles of Boston Massachusetts
9; 100
the model codes are the _____ acceptable level of performance or risk, and therefore there may be an instance in which the code is not adequate for the circumstances
minimum
which of the following refers to a system of rules regulations or laws typically developed by private not for profit organizations
model code
________ codes attempt to achieve a balance between the hazards posed by the structure itself: the combustible contents, the floor areas above and below ground level that challenge manual firefighting efforts, and the cost of construction
model construction
which of the following organizations was NOT part of the merger to become the international code council in the mid 1990's
national fire protection association NFPA
in order to determine if the delivery system is adequate for manual firefighting what must the engineers calculate
needed fire flow
which type of indicating valve has a stem that rises and falls as the control wheel is turned and when the threads are fully extended the valve is open
outside screw and yoke valve
which type of material produces twice the amount of heat per pound than common combustibles
plastic
which pump operates by reciprocating motion with the liquid being drawn into a cylinder on the intake stroke and expelled under pressure on the discharge stroke by a plunger or piston
positive displacement
a __________ is a valve with a freestanding post that houses the stem extension of an underground valve control. the position of the valve is shown in a small window
post indicator valve
this type of fire requires an appropriate amount of gas fuel and air to mix before ignition or combustion occurs
premixed flame
which system establishes the building/ property owner as the responsible party to monitor the fire alarm system signals at his or her facility
proprietary supervising alarm system
________ is the form of heat transfer that occurs through electromagnetic energy. One example of this process is the sun heating the earth through millions of miles of space
radiation
which type of heat detector uses pneumatic or electronic methods to monitor how much temperature change takes place over a fixed amount of time
rate of rise heat detector
________ is the basis for the overall performance characteristics of the pump
rated performance
firefighters sometimes intentionally set controlled fires to remove fuel ahead of a hostile uncontrolled fire, this is known as
removing or interrupting the fuel supply
which term refers to the pressure exerted on a water supply system when water is flowing
residual pressure
what factor has a significant impact on fire growth, in addition to the shape of surrounding walls ceilings and roofs
size of a structure
which type of fire, usually seen with charcoal briquettes and burning cigarettes, has no flame but still generates significant heat
smoldering
when a fire begins to subside to the point at which the available fuel is exhausted or the oxygen level drops below 16 percent, it has reached which stage of fire
smoldering decay stage
class b fires involving flammable and combustible liquids are typically extinguished through which action
smothering
this type of fire starts without a known external heat source being applied to the combustible material
spontaneous combustion
what system permits first responders and in some cases building occupants to communicate between specific locations within the building and the fire control room via an internal communication system
two way emergency communication system
in the 1900's which of the following organizations developed a method of classifying or categorizing fire based on the extinguishing agent that was appropriate for the type of fire
underwater laboratories
when the pressure at the hose valve outlet exceeds a predetermined pressure how are fire fighters in most jurisdictions alerted of the high pressure
warning signs
_________ is the most effective suppression agent for class a fires because it has the ability to absorb the heat and reduce the temperature below the materials ignition temperature
water
which of the following extinguishing agents is NOT used to break the chain reaction through displacing the available oxygen
water
what occurs when a valve or nozzle is closed very quickly under pressure of the system and can cause severe damage to the water system
water hammer
which of the following hydrant styles has water in it for immediate use by firefighters and is controlled by separate valves for each opening
wet barrel
according to NFPA 72 the public mode audible sound level must last more than 60 seconds and must be at least _______ above the average ambient sound level
15 decibels
according to NFPA 14 a fire department connection must be located a minimum of _______ above the adjoining ground sidewalk or grade surface
18 inches
what is the duration and testing air pressure for the air test in a dry standpipe system
24 hours at 40 psi
________ prior to the public comment hearing the published results become the agenda for the public comment hearing and are distributed on the international code council website
45 days
according to NFPA 14 what is the maximum height that a fire department connection may be located above the adjoining ground sidewalk or grade surface
48 inches
the design of water based fire extinguishing systems is based on the premise that one gallon of water when properly, can absorb how many british thermal units
8000
which type of detector is typically installed in an area where environmental conditions or temperatures fluctuate, so the heat output of a fire will be high
heat detector
what type of material is generally the best for heat transfer through conduction because it absorbs and transmits heat rapidly and evenly
heavy dense material
in building emergency voice alarm communication system EVACS are an integral part of which type of building ( because this type of building presents rescue challenges for fire personnel)
high rise building
which of the following stages of fire occurs when the heat source, fuel, and oxygen come together to generate more heat than is dissipated, thus promoting the uninhibited chain reaction
incipient stage
which person or organization requires commercial and industrial building owners to install some type of fire protection system
insurance companies
which type of detector uses to electronically charged plates and a small amount of radioactive material to detect a fire
ionization smoke detector
_______ is defined as the pressure exerted on a water supply system when there is no water
static pressure
which signal sounds when there is a change in the normal ready status of other fire protection systems or devices that are connected to or integrated with the fire alarm panel
supervisory signal
________ may be a voice message heard from loud speakers or a symbol flashing on a computer screen
textual signals
_______ is/are considered to be the most important parts of any fire alarm system
the fire alarm control panel
which of the following is a geometric depiction, developed through ongoing research, showing how fire is sustained by a chain reaction
the fire tetrahedron
what has served as a teaching tool to geometrically depict the relationship between fuel air and heat?
the fire triangle
