GENERAL KNOWLEDGE EXAM
QUESTIONS AND ANSWERS
AhydraulicUbenderUisUusedUtoUbendUwhatUsizeUconduitUtoUstart?U-UCORRECTUANSWERS-
aU53mmU(2")Uconduit.
TheUminimumUlengthUofUconductorUthatUmustUbeUleftUinUaUboxUforUmakingUconnectionsUisU-
UCORRECTUANSWERS-150mmU(inch).
AUshieldUisUnotUproperlyUbondedUifU-UCORRECTUANSWERS-thereUisUanUerraticUsignalUonUaUdevice.
TheUdisconnectingUmeansUforUhermeticUequipmentUisUhowUfar?U-UCORRECTUANSWERS-
withinUsightUandU3m.UAllUothersUareUwithinUsightUandU9m.
TheUtapUconductorUfromUaUjunctionUboxUtoUaUheaterUisU-UCORRECTUANSWERS-
notUlessUthanU500mm.
MaximumUvoltageUtoUgroundUallowedUinUaUdwellingUunitUisU-UCORRECTUANSWERS-150.
TheUminimumUsizeUofUaUbondingUconductorUforUcommercialU(PublicUAddressUsystemUinUpatientUca
re)U-UCORRECTUANSWERS-isU#12.
MaximumUcurrentUratingUallowedUbeforeUcablesUmustUbeUde-ratedUdueUtoUsheathUcurrentUisU-
UCORRECTUANSWERS-200AU(400AUforUaluminum).
WhereUsingleUconductorsUenterUmetalUboxesUthroughUopenings,UwhatUprecautionsUmustUbeUtaken
?U-UCORRECTUANSWERS-
, preventUoverheatingUofUtheUmetalUbyUinductionUifUtheUcurrentUcarriedUperUconductorUexceedsU20
0A.
WhenUinstallingUtheUgroundingUsystemUforUanUoutdoorUhighUvoltageUsubstation,UtheUminimumUsiz
eUofUgroundUgridUconductorUmustUbeU-UCORRECTUANSWERS-2/0Uawg.
LadderUratiosUareU-UCORRECTUANSWERS-
3:1UminUandU4:1Umax.UForUdistanceUfromUtheUwall,UitisUviceUversa.
AUWebUsteelUjoistUisUonUwhichUdrawing?U-UCORRECTUANSWERS-structural
WhenUinstallingUaUbackupUpowerUsource,UtheUtypeUofUdeviceUusedUtoUswitchUfromUtheUnormalUpo
werUtoUbackUupUpowerUisUaU-UCORRECTUANSWERS-transferUswitch.
TheUmaximumUunguyedUprojectionUforUtheUsupportUmember,UorUserviceUmast,UforUaUconsumer'sUs
erviceUisU-UCORRECTUANSWERS-1.5m
WhenUanUAC-
90UcableUisUrunUthroughUmetalUstudsUthatUareUtoUbeUcoveredUbyUdrywall,UtheUcablesUmustUbeUkept
U-UCORRECTUANSWERS-32mmU(1-1/4")UfromUtheUedgeUofUtheUstud
TheUmaximumUvoltageUallowedUonUanUNMD-90UcableUisU-UCORRECTUANSWERS-
300VUbetweenUanyUtwoUconductors.
TheUmaximumUdistanceUfromUtheUfloorUtoUtheUmidpointUofUaUreceptacleUusedUtoUsupplyUanUelectri
cUrangeUinUaUdwellingUunitUisU-UCORRECTUANSWERS-130mmU(5").
SizeUofUpullUboxes,UstraightUthroughUisU-UCORRECTUANSWERS-8UtimesUandUangleUorUU-
UpullUisU6Utimes