D386 WGU PAbg bg
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SPECIAL HAZARDS SYSTEMS LVL 2
Abgdevicebgthatbgreducesbgthebginputbgvoltagebgtobgabglowerbgvoltagebgforbgusebginbganbgelectricalbgcircuitbgisbgcalledbgabg__
_____.bg-bganswer--Step-downbgtransformer.bgAbgstep-
downbgtransformerbgreducesbgthebginputbgvoltagebgtobgabglowerbgvoltage.
Anbgelectromechanicalbgrelaybghasbgabgcoilbgthat,bgwhenbgenergized,bgallowsbgabgsetbgofbgelectricalbgcontactsbgtobgchang
statebgwithbgnobgmovingbgparts.bg-bganswer--False.bgAnbgelectromechanicalbgrelaybghasbgmoveablebgcontacts.bgAbgsolid
statebgrelaybghasbgnobgmovingbgparts.
AbgDiode.bg-bganswer--Abgdevicebgthatbgpermitsbgcurrentbgtobgflowbgthroughbgitbginbgonlybgonebgdirection.
Tobgensurebgcopperbgconductorsbgcanbgbebgbentbgwithoutbgbreaking,bgtobgremovebgstiffness,bgandbgimprovebgoverallbgfle
bility,bgthebgconductorsbgarebgheatedbgtobgoverbg700°bgFbg(371°bgC)bgandbgallowedbgtobgcool.bgThisbgprocessbgisbgcalledbg_
_____.bg-bganswer--Annealing
abgdisadvantagebgabgcircuitbgbreakerbghasbgcomparedbgtobgabgfuse?bg-bganswer--
Internalbgcomponentsbgcanbgdeterioratebgoverbgtimebgorbgfrombgrepeatedbguse.
Abgnon-latchingbgpushbgbuttonbgswitchbgisbgsometimesbgcalledbgabg__________bgswitch.bg-bganswer--Momentary
Solenoidbg-bganswer--
Anbgelectromechanicalbgsolenoidbgisbgusedbginbgfirebgsuppressionbgsystemsbgtobgreleasebgthebgsuppressionbgagentbgfrom
storagebgcylinders.bgWhenbgelectricbgcurrentbgisbgappliedbgtobgthebgcoilbgofbgabgrelaybgorbgabgsolenoid,bgthebgmagneticbgfie
attractsbganbgarmature.bgThebgarmaturebgthenbgcausesbgdifferentbgactionsbginbgthebgrelaybgandbgthebgsolenoid.
Abgdouble-throwbgswitchbghasbgabgcontactbgthatbgcanbgbebgconnectedbgtobgeitherbgofbgthreebgotherbgcontacts.bg-bganswer-
False.bgAbgdouble-
throwbgswitchbghasbgabgcontactbgthatbgcanbgbebgconnectedbgtobgeitherbgofbgTWObgotherbgcontacts.bgAbgswitchbgthatbgcanbg
bgconnectedbgtobgonebgofbgTHREEbgotherbgcontactsbgisbgabgtriple-throwbgswitch.
AnbgaddressablebgfirebgalarmbgsystembghasbgabgfiberbgopticbgcircuitbgthatbgrunsbgfrombgBuildingbgA,bggoesbgunderground,
ndbggoesbgintobgBuildingbgB.bgTobgconvertbgthebgelectricalbgsignalbgofbgthebgaddressablebgcontrolbgpanelbginbgBuildingbgAb
obglightbgandbgthenbgbackbgtobgelectricalbgenergybgforbgusebginbgBuildingbgB,bgwebgwillbgneedbgtobgusebgabg____________.b
bganswer--
Transducer.bgAbgtransducerbgcanbgconvertbgabgsignalbginbgonebgformbgofbgenergybgtobgabgsignalbginbganotherbgformbgofbgen
gy.bgInbgthisbgcase,bgelectricalbgenergybgintobglightbgandbglightbgbackbgintobgelectricalbgenergy.
Whichbgtypebgofbgconductorbgisbgmorebgresistantbgtobgvibrations?bg-bganswer--Stranded
Atbgitsbgmostbgbasicbglevel,bganbgelectromechanicalbgorbgsolid-statebgrelaybgisbga(n)bg__________bgoperatedbgswitch.bg-
bganswer--
Electrically.bgWhenbgthebgcorrectbgelectricbgcurrentbgisbgappliedbgtobgthebgrelay'sbginput,bgthebgrelaybgwillbgswitchbgcircuitsb
nbgorbgoffbgdependingbguponbghowbgitbgisbgwiredbgintobgabgcircuit.
1bg/
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Tobgensurebga_esovgq
bgfusebgprotectsbgthebgcircuitbgconductorsbgandbgcomponents,bgitbgmustbgbebgwiredbginbgseriesbgwithbgthebgc
uit.bg-bganswer--
True.bgAbgfusebgmustbgbebgconnectedbginbgseriesbgtobgthebgcircuitbgorbgcomponentbgitbgisbgmeantbgtobgprotect.
Whichbgcomponentbgallowsbganbgelectricbgcurrentbgtobgbebgswitchedbgonbgorbgoffbgwhenbgabgsmallbgelectricbgcurrentbgisbga
liedbgtobgitsbgbase?bg-bganswer--
Transistor.bgAbgtransistorbghasbganbgemitter,bgcollector,bgandbgabgbase.bgWhenbgelectricbgcurrentbgisbgappliedbgtobgthebgba
,bgabglargebgamountbgofbgcurrentbgcanbgflowbgbetweenbgthebgcollectorbgandbgthebgemitter.bgThisbgallowsbgthebgtransistorbgto
actbgasbganbgamplifier,bgabgswitch,bgorbganbgoscillator
Whichbgcomponentbgisbgusedbgtobglimitbgcurrentbgflowbginbganbgelectricalbgcircuit?bg-bganswer--
Resistor.bgResistorsbglimitbgcurrentbgflowbginbgcircuitsbgandbgarebgoftenbgusedbginbgfirebgalarmbgcircuitsbgtobghelpbgwithbgsup
vision.
Abgtransformerbgthatbghasbg100bgturnsbgonbgitsbgprimarybgwindingsbgandbg200bgturnsbgonbgitsbgsecondarybgwindingsbgisbgc
edbgabgstep-upbgtransformer.bgIfbgthebgtransformer'sbgvolt-
amperebg(VA)bgratingbgisbg600bgVAbgwithbganbginputbgvoltagebgofbg120bgvoltsbgAC,bgwhatbgwillbgbebgthebgvoltagebgandbgamp
agebgonbgthebgoutputbgsidebgofbgthebgtransformer?bg-bganswer--
240bgvoltsbgACbgandbg2.5bgamps.bgThebgVAbgratingbgofbgabgstep-upbgorbgstep-
downbgtransformerbgwillbgalwaysbgbebgthebgsame.
So,bgwhenbgthebgoutputbgvoltagebglevelbgchanges,bgthebgamountbgofbgcurrentbgthebgtransformerbgproducesbgchangesbgas
well.bgInbgabgstep-
upbgtransformer,bgthebgamountbgofbgcurrentbgavailablebgisbginverselybgproportionalbgtobgthebgincreasebginbgthebgoutputbgvo
age.
Inbgourbgexample,bgabg600bgVAbgtransformerbgwithbganbginputbgofbg120bgvoltsbgmeansbgthatbgwebghavebg5bgampsbgavailabl
onbgthebginputbgside.
600bgVAbg÷bg120bgvoltsbg=bg5bgamps
SincebgthebgsamebgVAbgenergybgisbgpresentbgonbgthebgoutputbgside,bgbutbgourbgvoltagebghasbgincreased,bgourbgamperage
vailablebghasbgdecreased.
600bgVAbg÷bg240bgvoltsbg=bg2.5bgamps
Abgfirebgalarmbgsystembginbgwhichbgthebgdetectorsbgreportbgalarmsbgusingbgdigitalbgcommunicationsbgprotocolsbginbgabgsig
alingbglinebgcircuitbgisbgcalledbgabgconventionalbgfirebgalarmbgsystem.bg-bganswer--
False.bgThisbgtypebgofbgfirebgalarmbgsystembgisbganbgaddressablebgfirebgalarmbgsystem.
Whenbgtwobgorbgmorebgautomaticbgfirebgdetectorsbginbgtwobgseparatebgzonesbgarebgusedbgtobgdetectbgabgfirebginbgthebgsam
area,bgthisbgisbgknownbgasbg__________.bg-bganswer--Cross-zoning.bgInbgcross-
zoning,bgthebgdetectorsbgwithinbgthebgdifferentbgzonesbgarebgmountedbginbgrelativebgclosebgproximitybgandbgwillbgmonitorb
ebgsamebgarea.bgWhenbgbothbgdetectorsbgsensebgthebgsamebgfire,bgthebgfirebgalarmbgreleasingbgpanelbgwillbgallowbgthebgsu
pressionbgagentbgtobgdischarge.
Thebgbestbgtestbgequipmentbgtobgtestbgconductorbginsulation?bg-bganswer--
Megohmmeter.bgItbgisbgcapablebgofbgtestingbghighbgresistancebgandbgprovidingbgabgreliablebgreading.bgConductorbginsula
nbghasbgabghighbgresistancebgthatbgcannotbgbebgaccuratelybgreadbgusingbganbgohmmeter.
Abgnotificationbgappliancebgcircuitbgdevelopsbganbgopenbgsomewherebginbgitsbgcircuit.bgWhenbgthisbghappens,bginbgwhatbgt
ebgframebgshouldbgthebgfirebgalarmbgsystembgindicatebgthebgfaultbgatbgthebgcontrolbgpanel?bg-bganswer--
200bgseconds.bgReferencebgNFPAbg72bg2019,bgSectionbg12.6.1.
WherebginbgNFPAbg72bgwouldbgwebgfindbgthebgtestingbgproceduresbgforbgverifyingbgthebgcircuitbgintegritybgofbgcopperbgcon
ctors?bg-bganswer--Thebgcorrectbganswerbgis:bgTablebg14.4.3.2(15)(5).
2bg/
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, D386 WGU PA
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Studybgonlinebgatbghttps://quizlet.com/
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Allbgfirebgalarmbgsystemsbgmonitorbgdetectorbgandbgnotificationbgappliancebgcircuitsbgforbgfaults.bgThisbgisbgcalledbgsuperv
on,bgorbgmonitoringbgforbgintegrity.bg-bganswer--
True.bgAnybgcircuitbgusedbgtobgreportbgabgfirebgalarmbgorbgtobgalertbgoccupantsbgtobgabgfirebgisbgmonitoredbg(supervised)bgfo
aults.
Inbgabgsystembgwherebgtwobgflamebgdetectorsbgarebgusedbginbgabgcross-
zoningbgsetupbgtobgdetectbgabgfire,bgthebgfirebgalarmbgcontrolbgpanelbgisbgsetbgupbgforbgabg__________bgconfiguration.bg-
bganswer--Countingbgzones.
Tobgfindbgabggroundbgfaultbgonbgabgcircuit,bgthebgbestbgpiecebgofbgtestbgequipmentbgtobgusebgwouldbgbebga(n)bg__________
bganswer--
Ohmmeter.bgWhenbgmeasuringbgthebgconductors,bgyoubgarebgtestingbgagainstbgabgreliablebggroundbgpoint.bgYoubgcanbgd
erminebgifbgyourbgconductor(s)bgisbg(are)bggroundedbgifbgtherebgisbgabglowbgresistancebgreadingbgbetweenbgthebgconducto
andbgthebggroundbgpoint.
A(n)bg__________bginbgabgcircuitbgpathwaybgisbganbgunwantedbgdisconnectionbgfrombgthebgpowerbgsourcebginbgwhichbgno
urrentbgcanbgflow.bg-bganswer--Open.
A(n)bg__________bgcanbgbebgdefinedbgasbganbgelectricalbgcircuitbgofbglowerbgresistancebgthanbgthatbgofbgabgnormalbgcircui
typicallybgresultingbgfrombgthebgunintendedbgcontactbgofbgcomponents.bg-bganswer--Short.
Inbgorderbgtobgcorrectlybgaimbgabgflamebgdetector,bgyoubgmaybgneedbgtobgusebga(n)bg__________.bg-bganswer--
AnbgAnglebgfinder.bgYoubgmaybgalsobgneedbgtobgusebgabglaserbgpointer.bgAlwaysbgcheckbgthebgmanufacturer'sbgpublished
nstructions.
Inbgwhatbgtimeframebgmustbgabgsprinklerbgwaterflowbgalarmbgactivatebgwhenbgabgflowbgequalbgto,bgorbggreaterbgthanbgthatb
ombgthebgsmallestbgorificebgsprinklerbgactivatesbginbgthebgsprinklerbgsystem?bg-bganswer--
90bgseconds.bgReferencebgNFPAbg72bg2019,bgSectionbg17.13.2.
Carbonbgmonoxidebgconcentrationsbgasbglowbgasbg__________bgcanbgcausebgheadaches,bgnausea,bgandbgdizzinessbga
rbg45bgminutesbgofbgexposure.bg-bganswer--800bgpartsbgperbgmillion.
Whichbgtypebgofbgheatbgdetectionbgusesbgtwobgsteelbgconductorsbgcoatedbgwithbgabgheatbgsensitivebgpolymer?
bgThebgpolymerbgmeltsbgawaybgallowingbgthebgsteelbgconductorsbgtobgmakebgcontactbgandbgcausebganbgalarm.bg-bganswer
Line-type.
Whatbgisbgthebgminimumbgdistancebgthatbgabgpullbgstation'sbgoperablebgpartbgmaybgbebglocatedbgfrombgthebgfinishedbgfloor
bg-bganswer--42bgin.bgReferencebgNFPAbg72bg2019,bgSectionbg17.15.6.
Whichbgdetectorbgisbgabg"line-of-sight"bgdevice?bg-bganswer--
Flamebgdetector.bgFlamebgdetectorsbgarebgopticalbgdevicesbgthatbgmustbgbebgablebgtobg"see"bgthebgareabgwherebgtheybgar
monitoring.bgIfbgthebglensbgisbgdirtybgorbgthebgline-of-
sightbgisbgblocked,bgthebgdetectorbgwillbgnotbgbebgablebgtobgsensebgthebgfire.
Abgrate-of-
risebgheatbgdetectorbgwillbgsignalbganbgalarmbgonlybgwhenbgabgpredeterminedbgtemperaturebgisbgreachedbginbgthebgareabgt
bgdetectorbgisbgmonitoring.bg-bganswer--False.bgAbgrate-of-
risebgheatbgdetectorbgwillbgsignalbganbgalarmbgwhenbgthebgtemperaturebginbgthebgareabgrisesbgrapidly,bgusuallybg15bgdegre
bgFbg(orbghigher)bgperbgminute.
3bg/
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, D386 WGU PA
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Studybgonlinebgatbghttps://quizlet.com/
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Abgwaterbgtemperature bgswitchbgisbgabgtypebgofbg__________bgdevicebgusedbgtobgalertbgusbgtobganbgabnormalbgcondition.b
bganswer--
Supervisory.bgSupervisorybgdevicesbgletbgusbgknowbgwhenbgpartbgofbgthebgsystembgisbginbganbgabnormalbgconditionbgorbgp
ition.
Whichbgautomaticbgfirebgdetectorsbghavebgthebgfastestbgreactionbgtimebgcomparedbgtobgthebgothers?bg-bganswer--
Flamebgdetector.bgFlamebgdetectorsbgarebgverybgfastbgreactingbgdetectorsbgandbgarebgusedbginbgfirebgsuppressionbgsyste
sbgtobgextinguishbgfiresbgbeforebgthebgfirebghasbgthebgchancebgtobggrow.
Mechanicalbgheatbgdetectorsbgarebgtypicallybglowerbginbgcostbgthanbgelectronicbgheatbgdetectorsbgandbgarebgalsobgtypicall
ablebgtobgbebgresetbgafterbgsignalingbganbgalarm.bg-bganswer--
False.bgMechanicalbgheatbgdetectorsbgarebgtypicallybglowerbginbgcost,bgbutbgoncebgthebgmechanicalbgportionbgofbgthebgdet
torbghasbgactuated,bgthebgdetectorbgwillbgneedbgtobgbebgreplaced.
Truebgstatementsbgaboutbgpullbgstationsbg-bganswer--(1)bgPullbgstationsbgshallbgbebgredbginbgcolor
(2)bgPullbgstationsbgshallbgbebglocatedbgwithinbg5bgft.bgofbgeachbgexitbgopeningbgatbgeachbgexitbgonbgeachbgfloor
(3)bgPullbgstationsbgshallbgbebginstalledbgonbgeachbgsidebgofbggroupedbgopeningsbgoverbg40bgft.bginbgwidthbgandbgwithinbg5bg
gofbgeachbgsidebgofbgthebgopening.
ReferencebgNFPAbg72bg2019,bgSectionsbg17.15.9.3,bg17.15.9.4,bgandbg17.15.9.6bgrespectively.
Electronicbgheatbgdetectorsbgutilizebg___________,bgwhichbgarebgelectronicbgcomponentsbgthatbgchangebgresistancebgb
edbgonbgthebgambientbgtemperature.bg-bganswer--
Thermistors.bgThermistorsbgchangebgtheirbgresistancebgvaluebgbasedbguponbgthebgtemperature.bgThermistorsbgarebguse
ginbgelectronicbgheatbgdetectorsbgallowingbgthebgheatbgdetectorsbgtobgbebgrestorablebgtypebgdetectors.
Abgwaterbglevelbgsupervisorybgswitchbgforbgabgpressurebgtankbgmustbgsignalbganbgoff-
normalbgconditionbgwhenbgthebgwaterbglevelbginbgthebgpressurebgstoragebgtankbgrisesbgorbglowersbgmorebgthanbg________
_.bg-bganswer--3bgin.bgReferencebgNFPAbg72bg2019,bgSectionbg17.17.3.2.1.
Afterbgcleaningbgabgsmokebgdetector,bgyoubgmustbgtestbgthebgsensitivitybgagain.bg-bganswer--
True.bgAfterbgthebgsmokebgdetectorbghasbgbeenbgreassembled,bgyoubgmustbgretestbgitbgtobgseebgifbgitbgisbgwithinbgthebglisted
sensitivitybgrange.bgIfbgitbgisbgnot,bgitbgmustbgbebgreplaced.
Videobgsmokebgdetectionbgcanbgdetectbgsmokebginbgwhichbgways?bg-bganswer--
Presencebgofbgsmokebgwithinbgthebgfieldbgofbgviewbgofbgthebgcamerabgandbgpresencebgofbgambientbgsmoke.
Photoelectricbgspot-typebgsmokebgdetectorsbgoperatebgusingbgthebg___________bgconcept.bg-bganswer--
Lightbgscattering.bgWhenbgsmokebgentersbgthebgchamber,bglightbgfrombganbgLEDbghitsbgthebgsmokebgparticlesbgandbgscatt
sbgthebglight.bgAbgsensorbgthatbgnormallybgdoesbgnotbgreceivebganybglightbgwillbggetbglightbgoffbgthebgsmokebgparticles.bgWhe
gabgpredeterminedbgamountbgofbglightbgisbgcollectedbgbybgthebgsensor,bgthebgsmokebgdetectorbgwillbgsignalbganbgalarm.
Ifbganybgsmokebgdetectorbgfailsbgabgsensitivitybgtestbgbybgbeingbgwithinbg5%bgofbgitsbgupperbglistedbgsensitivitybgrange,bgthe
etectorbgshallbgbebgcleanedbgandbgrecalibrated,bgorbgbebgreplaced.bg-bganswer--
False.bgReferencebgNFPAbg72bg2019,bgSectionbg14.4.4.3.4.bgThebgsmokebgdetectorbgfailsbgabgsensitivitybgtestbgwhenbgitb
asbgabgsensitivitybgoutsidebgofbgitsbglistedbgrange.
beam-typebgsmokebgdetectorsbgarebgnotbgnormallybgaffectedbgby?bg-bganswer--
Altitudebgabovebg3,000bgft.bgReferencebgNFPAbg72bg2019,bgTablebgA.17.7.1.8.
4bg/
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Studybgonlinebgatbghttps://quizlet.com/
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SPECIAL HAZARDS SYSTEMS LVL 2
Abgdevicebgthatbgreducesbgthebginputbgvoltagebgtobgabglowerbgvoltagebgforbgusebginbganbgelectricalbgcircuitbgisbgcalledbgabg__
_____.bg-bganswer--Step-downbgtransformer.bgAbgstep-
downbgtransformerbgreducesbgthebginputbgvoltagebgtobgabglowerbgvoltage.
Anbgelectromechanicalbgrelaybghasbgabgcoilbgthat,bgwhenbgenergized,bgallowsbgabgsetbgofbgelectricalbgcontactsbgtobgchang
statebgwithbgnobgmovingbgparts.bg-bganswer--False.bgAnbgelectromechanicalbgrelaybghasbgmoveablebgcontacts.bgAbgsolid
statebgrelaybghasbgnobgmovingbgparts.
AbgDiode.bg-bganswer--Abgdevicebgthatbgpermitsbgcurrentbgtobgflowbgthroughbgitbginbgonlybgonebgdirection.
Tobgensurebgcopperbgconductorsbgcanbgbebgbentbgwithoutbgbreaking,bgtobgremovebgstiffness,bgandbgimprovebgoverallbgfle
bility,bgthebgconductorsbgarebgheatedbgtobgoverbg700°bgFbg(371°bgC)bgandbgallowedbgtobgcool.bgThisbgprocessbgisbgcalledbg_
_____.bg-bganswer--Annealing
abgdisadvantagebgabgcircuitbgbreakerbghasbgcomparedbgtobgabgfuse?bg-bganswer--
Internalbgcomponentsbgcanbgdeterioratebgoverbgtimebgorbgfrombgrepeatedbguse.
Abgnon-latchingbgpushbgbuttonbgswitchbgisbgsometimesbgcalledbgabg__________bgswitch.bg-bganswer--Momentary
Solenoidbg-bganswer--
Anbgelectromechanicalbgsolenoidbgisbgusedbginbgfirebgsuppressionbgsystemsbgtobgreleasebgthebgsuppressionbgagentbgfrom
storagebgcylinders.bgWhenbgelectricbgcurrentbgisbgappliedbgtobgthebgcoilbgofbgabgrelaybgorbgabgsolenoid,bgthebgmagneticbgfie
attractsbganbgarmature.bgThebgarmaturebgthenbgcausesbgdifferentbgactionsbginbgthebgrelaybgandbgthebgsolenoid.
Abgdouble-throwbgswitchbghasbgabgcontactbgthatbgcanbgbebgconnectedbgtobgeitherbgofbgthreebgotherbgcontacts.bg-bganswer-
False.bgAbgdouble-
throwbgswitchbghasbgabgcontactbgthatbgcanbgbebgconnectedbgtobgeitherbgofbgTWObgotherbgcontacts.bgAbgswitchbgthatbgcanbg
bgconnectedbgtobgonebgofbgTHREEbgotherbgcontactsbgisbgabgtriple-throwbgswitch.
AnbgaddressablebgfirebgalarmbgsystembghasbgabgfiberbgopticbgcircuitbgthatbgrunsbgfrombgBuildingbgA,bggoesbgunderground,
ndbggoesbgintobgBuildingbgB.bgTobgconvertbgthebgelectricalbgsignalbgofbgthebgaddressablebgcontrolbgpanelbginbgBuildingbgAb
obglightbgandbgthenbgbackbgtobgelectricalbgenergybgforbgusebginbgBuildingbgB,bgwebgwillbgneedbgtobgusebgabg____________.b
bganswer--
Transducer.bgAbgtransducerbgcanbgconvertbgabgsignalbginbgonebgformbgofbgenergybgtobgabgsignalbginbganotherbgformbgofbgen
gy.bgInbgthisbgcase,bgelectricalbgenergybgintobglightbgandbglightbgbackbgintobgelectricalbgenergy.
Whichbgtypebgofbgconductorbgisbgmorebgresistantbgtobgvibrations?bg-bganswer--Stranded
Atbgitsbgmostbgbasicbglevel,bganbgelectromechanicalbgorbgsolid-statebgrelaybgisbga(n)bg__________bgoperatedbgswitch.bg-
bganswer--
Electrically.bgWhenbgthebgcorrectbgelectricbgcurrentbgisbgappliedbgtobgthebgrelay'sbginput,bgthebgrelaybgwillbgswitchbgcircuitsb
nbgorbgoffbgdependingbguponbghowbgitbgisbgwiredbgintobgabgcircuit.
1bg/
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, D386 WGU PA
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Studybgonlinebgatbghttps://quizlet.com/
Tobgensurebga_esovgq
bgfusebgprotectsbgthebgcircuitbgconductorsbgandbgcomponents,bgitbgmustbgbebgwiredbginbgseriesbgwithbgthebgc
uit.bg-bganswer--
True.bgAbgfusebgmustbgbebgconnectedbginbgseriesbgtobgthebgcircuitbgorbgcomponentbgitbgisbgmeantbgtobgprotect.
Whichbgcomponentbgallowsbganbgelectricbgcurrentbgtobgbebgswitchedbgonbgorbgoffbgwhenbgabgsmallbgelectricbgcurrentbgisbga
liedbgtobgitsbgbase?bg-bganswer--
Transistor.bgAbgtransistorbghasbganbgemitter,bgcollector,bgandbgabgbase.bgWhenbgelectricbgcurrentbgisbgappliedbgtobgthebgba
,bgabglargebgamountbgofbgcurrentbgcanbgflowbgbetweenbgthebgcollectorbgandbgthebgemitter.bgThisbgallowsbgthebgtransistorbgto
actbgasbganbgamplifier,bgabgswitch,bgorbganbgoscillator
Whichbgcomponentbgisbgusedbgtobglimitbgcurrentbgflowbginbganbgelectricalbgcircuit?bg-bganswer--
Resistor.bgResistorsbglimitbgcurrentbgflowbginbgcircuitsbgandbgarebgoftenbgusedbginbgfirebgalarmbgcircuitsbgtobghelpbgwithbgsup
vision.
Abgtransformerbgthatbghasbg100bgturnsbgonbgitsbgprimarybgwindingsbgandbg200bgturnsbgonbgitsbgsecondarybgwindingsbgisbgc
edbgabgstep-upbgtransformer.bgIfbgthebgtransformer'sbgvolt-
amperebg(VA)bgratingbgisbg600bgVAbgwithbganbginputbgvoltagebgofbg120bgvoltsbgAC,bgwhatbgwillbgbebgthebgvoltagebgandbgamp
agebgonbgthebgoutputbgsidebgofbgthebgtransformer?bg-bganswer--
240bgvoltsbgACbgandbg2.5bgamps.bgThebgVAbgratingbgofbgabgstep-upbgorbgstep-
downbgtransformerbgwillbgalwaysbgbebgthebgsame.
So,bgwhenbgthebgoutputbgvoltagebglevelbgchanges,bgthebgamountbgofbgcurrentbgthebgtransformerbgproducesbgchangesbgas
well.bgInbgabgstep-
upbgtransformer,bgthebgamountbgofbgcurrentbgavailablebgisbginverselybgproportionalbgtobgthebgincreasebginbgthebgoutputbgvo
age.
Inbgourbgexample,bgabg600bgVAbgtransformerbgwithbganbginputbgofbg120bgvoltsbgmeansbgthatbgwebghavebg5bgampsbgavailabl
onbgthebginputbgside.
600bgVAbg÷bg120bgvoltsbg=bg5bgamps
SincebgthebgsamebgVAbgenergybgisbgpresentbgonbgthebgoutputbgside,bgbutbgourbgvoltagebghasbgincreased,bgourbgamperage
vailablebghasbgdecreased.
600bgVAbg÷bg240bgvoltsbg=bg2.5bgamps
Abgfirebgalarmbgsystembginbgwhichbgthebgdetectorsbgreportbgalarmsbgusingbgdigitalbgcommunicationsbgprotocolsbginbgabgsig
alingbglinebgcircuitbgisbgcalledbgabgconventionalbgfirebgalarmbgsystem.bg-bganswer--
False.bgThisbgtypebgofbgfirebgalarmbgsystembgisbganbgaddressablebgfirebgalarmbgsystem.
Whenbgtwobgorbgmorebgautomaticbgfirebgdetectorsbginbgtwobgseparatebgzonesbgarebgusedbgtobgdetectbgabgfirebginbgthebgsam
area,bgthisbgisbgknownbgasbg__________.bg-bganswer--Cross-zoning.bgInbgcross-
zoning,bgthebgdetectorsbgwithinbgthebgdifferentbgzonesbgarebgmountedbginbgrelativebgclosebgproximitybgandbgwillbgmonitorb
ebgsamebgarea.bgWhenbgbothbgdetectorsbgsensebgthebgsamebgfire,bgthebgfirebgalarmbgreleasingbgpanelbgwillbgallowbgthebgsu
pressionbgagentbgtobgdischarge.
Thebgbestbgtestbgequipmentbgtobgtestbgconductorbginsulation?bg-bganswer--
Megohmmeter.bgItbgisbgcapablebgofbgtestingbghighbgresistancebgandbgprovidingbgabgreliablebgreading.bgConductorbginsula
nbghasbgabghighbgresistancebgthatbgcannotbgbebgaccuratelybgreadbgusingbganbgohmmeter.
Abgnotificationbgappliancebgcircuitbgdevelopsbganbgopenbgsomewherebginbgitsbgcircuit.bgWhenbgthisbghappens,bginbgwhatbgt
ebgframebgshouldbgthebgfirebgalarmbgsystembgindicatebgthebgfaultbgatbgthebgcontrolbgpanel?bg-bganswer--
200bgseconds.bgReferencebgNFPAbg72bg2019,bgSectionbg12.6.1.
WherebginbgNFPAbg72bgwouldbgwebgfindbgthebgtestingbgproceduresbgforbgverifyingbgthebgcircuitbgintegritybgofbgcopperbgcon
ctors?bg-bganswer--Thebgcorrectbganswerbgis:bgTablebg14.4.3.2(15)(5).
2bg/
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, D386 WGU PA
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Studybgonlinebgatbghttps://quizlet.com/
_esovgq
Allbgfirebgalarmbgsystemsbgmonitorbgdetectorbgandbgnotificationbgappliancebgcircuitsbgforbgfaults.bgThisbgisbgcalledbgsuperv
on,bgorbgmonitoringbgforbgintegrity.bg-bganswer--
True.bgAnybgcircuitbgusedbgtobgreportbgabgfirebgalarmbgorbgtobgalertbgoccupantsbgtobgabgfirebgisbgmonitoredbg(supervised)bgfo
aults.
Inbgabgsystembgwherebgtwobgflamebgdetectorsbgarebgusedbginbgabgcross-
zoningbgsetupbgtobgdetectbgabgfire,bgthebgfirebgalarmbgcontrolbgpanelbgisbgsetbgupbgforbgabg__________bgconfiguration.bg-
bganswer--Countingbgzones.
Tobgfindbgabggroundbgfaultbgonbgabgcircuit,bgthebgbestbgpiecebgofbgtestbgequipmentbgtobgusebgwouldbgbebga(n)bg__________
bganswer--
Ohmmeter.bgWhenbgmeasuringbgthebgconductors,bgyoubgarebgtestingbgagainstbgabgreliablebggroundbgpoint.bgYoubgcanbgd
erminebgifbgyourbgconductor(s)bgisbg(are)bggroundedbgifbgtherebgisbgabglowbgresistancebgreadingbgbetweenbgthebgconducto
andbgthebggroundbgpoint.
A(n)bg__________bginbgabgcircuitbgpathwaybgisbganbgunwantedbgdisconnectionbgfrombgthebgpowerbgsourcebginbgwhichbgno
urrentbgcanbgflow.bg-bganswer--Open.
A(n)bg__________bgcanbgbebgdefinedbgasbganbgelectricalbgcircuitbgofbglowerbgresistancebgthanbgthatbgofbgabgnormalbgcircui
typicallybgresultingbgfrombgthebgunintendedbgcontactbgofbgcomponents.bg-bganswer--Short.
Inbgorderbgtobgcorrectlybgaimbgabgflamebgdetector,bgyoubgmaybgneedbgtobgusebga(n)bg__________.bg-bganswer--
AnbgAnglebgfinder.bgYoubgmaybgalsobgneedbgtobgusebgabglaserbgpointer.bgAlwaysbgcheckbgthebgmanufacturer'sbgpublished
nstructions.
Inbgwhatbgtimeframebgmustbgabgsprinklerbgwaterflowbgalarmbgactivatebgwhenbgabgflowbgequalbgto,bgorbggreaterbgthanbgthatb
ombgthebgsmallestbgorificebgsprinklerbgactivatesbginbgthebgsprinklerbgsystem?bg-bganswer--
90bgseconds.bgReferencebgNFPAbg72bg2019,bgSectionbg17.13.2.
Carbonbgmonoxidebgconcentrationsbgasbglowbgasbg__________bgcanbgcausebgheadaches,bgnausea,bgandbgdizzinessbga
rbg45bgminutesbgofbgexposure.bg-bganswer--800bgpartsbgperbgmillion.
Whichbgtypebgofbgheatbgdetectionbgusesbgtwobgsteelbgconductorsbgcoatedbgwithbgabgheatbgsensitivebgpolymer?
bgThebgpolymerbgmeltsbgawaybgallowingbgthebgsteelbgconductorsbgtobgmakebgcontactbgandbgcausebganbgalarm.bg-bganswer
Line-type.
Whatbgisbgthebgminimumbgdistancebgthatbgabgpullbgstation'sbgoperablebgpartbgmaybgbebglocatedbgfrombgthebgfinishedbgfloor
bg-bganswer--42bgin.bgReferencebgNFPAbg72bg2019,bgSectionbg17.15.6.
Whichbgdetectorbgisbgabg"line-of-sight"bgdevice?bg-bganswer--
Flamebgdetector.bgFlamebgdetectorsbgarebgopticalbgdevicesbgthatbgmustbgbebgablebgtobg"see"bgthebgareabgwherebgtheybgar
monitoring.bgIfbgthebglensbgisbgdirtybgorbgthebgline-of-
sightbgisbgblocked,bgthebgdetectorbgwillbgnotbgbebgablebgtobgsensebgthebgfire.
Abgrate-of-
risebgheatbgdetectorbgwillbgsignalbganbgalarmbgonlybgwhenbgabgpredeterminedbgtemperaturebgisbgreachedbginbgthebgareabgt
bgdetectorbgisbgmonitoring.bg-bganswer--False.bgAbgrate-of-
risebgheatbgdetectorbgwillbgsignalbganbgalarmbgwhenbgthebgtemperaturebginbgthebgareabgrisesbgrapidly,bgusuallybg15bgdegre
bgFbg(orbghigher)bgperbgminute.
3bg/
bg31
, D386 WGU PA
bg bg
Studybgonlinebgatbghttps://quizlet.com/
_esovgq
Abgwaterbgtemperature bgswitchbgisbgabgtypebgofbg__________bgdevicebgusedbgtobgalertbgusbgtobganbgabnormalbgcondition.b
bganswer--
Supervisory.bgSupervisorybgdevicesbgletbgusbgknowbgwhenbgpartbgofbgthebgsystembgisbginbganbgabnormalbgconditionbgorbgp
ition.
Whichbgautomaticbgfirebgdetectorsbghavebgthebgfastestbgreactionbgtimebgcomparedbgtobgthebgothers?bg-bganswer--
Flamebgdetector.bgFlamebgdetectorsbgarebgverybgfastbgreactingbgdetectorsbgandbgarebgusedbginbgfirebgsuppressionbgsyste
sbgtobgextinguishbgfiresbgbeforebgthebgfirebghasbgthebgchancebgtobggrow.
Mechanicalbgheatbgdetectorsbgarebgtypicallybglowerbginbgcostbgthanbgelectronicbgheatbgdetectorsbgandbgarebgalsobgtypicall
ablebgtobgbebgresetbgafterbgsignalingbganbgalarm.bg-bganswer--
False.bgMechanicalbgheatbgdetectorsbgarebgtypicallybglowerbginbgcost,bgbutbgoncebgthebgmechanicalbgportionbgofbgthebgdet
torbghasbgactuated,bgthebgdetectorbgwillbgneedbgtobgbebgreplaced.
Truebgstatementsbgaboutbgpullbgstationsbg-bganswer--(1)bgPullbgstationsbgshallbgbebgredbginbgcolor
(2)bgPullbgstationsbgshallbgbebglocatedbgwithinbg5bgft.bgofbgeachbgexitbgopeningbgatbgeachbgexitbgonbgeachbgfloor
(3)bgPullbgstationsbgshallbgbebginstalledbgonbgeachbgsidebgofbggroupedbgopeningsbgoverbg40bgft.bginbgwidthbgandbgwithinbg5bg
gofbgeachbgsidebgofbgthebgopening.
ReferencebgNFPAbg72bg2019,bgSectionsbg17.15.9.3,bg17.15.9.4,bgandbg17.15.9.6bgrespectively.
Electronicbgheatbgdetectorsbgutilizebg___________,bgwhichbgarebgelectronicbgcomponentsbgthatbgchangebgresistancebgb
edbgonbgthebgambientbgtemperature.bg-bganswer--
Thermistors.bgThermistorsbgchangebgtheirbgresistancebgvaluebgbasedbguponbgthebgtemperature.bgThermistorsbgarebguse
ginbgelectronicbgheatbgdetectorsbgallowingbgthebgheatbgdetectorsbgtobgbebgrestorablebgtypebgdetectors.
Abgwaterbglevelbgsupervisorybgswitchbgforbgabgpressurebgtankbgmustbgsignalbganbgoff-
normalbgconditionbgwhenbgthebgwaterbglevelbginbgthebgpressurebgstoragebgtankbgrisesbgorbglowersbgmorebgthanbg________
_.bg-bganswer--3bgin.bgReferencebgNFPAbg72bg2019,bgSectionbg17.17.3.2.1.
Afterbgcleaningbgabgsmokebgdetector,bgyoubgmustbgtestbgthebgsensitivitybgagain.bg-bganswer--
True.bgAfterbgthebgsmokebgdetectorbghasbgbeenbgreassembled,bgyoubgmustbgretestbgitbgtobgseebgifbgitbgisbgwithinbgthebglisted
sensitivitybgrange.bgIfbgitbgisbgnot,bgitbgmustbgbebgreplaced.
Videobgsmokebgdetectionbgcanbgdetectbgsmokebginbgwhichbgways?bg-bganswer--
Presencebgofbgsmokebgwithinbgthebgfieldbgofbgviewbgofbgthebgcamerabgandbgpresencebgofbgambientbgsmoke.
Photoelectricbgspot-typebgsmokebgdetectorsbgoperatebgusingbgthebg___________bgconcept.bg-bganswer--
Lightbgscattering.bgWhenbgsmokebgentersbgthebgchamber,bglightbgfrombganbgLEDbghitsbgthebgsmokebgparticlesbgandbgscatt
sbgthebglight.bgAbgsensorbgthatbgnormallybgdoesbgnotbgreceivebganybglightbgwillbggetbglightbgoffbgthebgsmokebgparticles.bgWhe
gabgpredeterminedbgamountbgofbglightbgisbgcollectedbgbybgthebgsensor,bgthebgsmokebgdetectorbgwillbgsignalbganbgalarm.
Ifbganybgsmokebgdetectorbgfailsbgabgsensitivitybgtestbgbybgbeingbgwithinbg5%bgofbgitsbgupperbglistedbgsensitivitybgrange,bgthe
etectorbgshallbgbebgcleanedbgandbgrecalibrated,bgorbgbebgreplaced.bg-bganswer--
False.bgReferencebgNFPAbg72bg2019,bgSectionbg14.4.4.3.4.bgThebgsmokebgdetectorbgfailsbgabgsensitivitybgtestbgwhenbgitb
asbgabgsensitivitybgoutsidebgofbgitsbglistedbgrange.
beam-typebgsmokebgdetectorsbgarebgnotbgnormallybgaffectedbgby?bg-bganswer--
Altitudebgabovebg3,000bgft.bgReferencebgNFPAbg72bg2019,bgTablebgA.17.7.1.8.
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