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