CHST Exam Study Guide Questions and Answers Updated 2026

CHST Exam Study Guide
Questions and Answers
Updated 2026
IsBaBtrenchBconsideredBanBexcavation?B-BAnswerBYes



WhatBisBtheBdistanceBaBworkerBneedsBtoBmaintainBfromBpowerBlines?B-BAnswerB10ft



WhatBdoesBtheBseverityBofBelectricBshockBdependBon?B-
BAnswerBPathBofBcurrent,BamountBofBcurrent,BdurationBofBexposure



TrueBorBfalse:BelectricalBcurrentBasBlowBasB75BmilliampsBcanBcauseBdeath?B-
BAnswerBTrue



WhatBareBsomeBexamplesBofBsurchargeBloads?B-
BAnswerBSpoilsBpileBandBequipBbeingBtooBcloseBtoBwalls



WhatBisBtheBcorrectBextensionBcordBforBconstruction?B-
BAnswerB3BwireBtypeBdesignedBforBhardBorBextraBhardBuse



TrueBorBfalse:BExposedBmetalBpartsBofBequipmentBshouldBbeBgroundedB-
BAnswerBTrue



HowBdoesBaBgfciBprotectBagainstBelectricalBshock?B-
BAnswerBDetectsBtheBdifferenceBinBcurrentBbetweenBtheBblackBandBwhiteBwires



HowBcanBoverloadedBcircuitBhazardsBbeBcontrolled?B-
BAnswerBThroughBtheBuseBofBelectricalBprotectiveBdevices

,WhatBareBsomeBexamplesBofBelectricalBprotectiveBdevices?B-
BAnswerBGfcis,Bfuses,BcircuitBbreakers



WhatBisBstaticBelectricity?B-BAnswerBAnBelectricBchargeBthatBcannotBmove



HowBwideBmustBtheBplatformBofBaBscaffoldBbe?B-BAnswerB18Binches



TheBplatformBofBaBscaffoldBmustBbeBcapableBofBsupportingBitsBweightBandB________
__BtimesBtheBmaximumBload.B-BAnswerBFour



TheBropesBorBwiresBusedBinBsuspensionBscaffoldsBmustBbeBcapableBofBsupportingB___
___BtimesBtheBload.B-BAnswerBSix



WhatBshouldBbeBusedBtoBrestrainBsupportedBscaffoldBplatformsBfromBtipping?B-
BAnswerBGuys,Bties,BorBbraces



WhatBisBFallBPrevention?B-
BAnswerBTheBprocess,Bequipment,BandBmethodsBusedBtoBactuallyBpreventBaBfallBfrom
Boccurring.



WhatBisBfallBprotection?B-
BAnswerBTheBprocess,Bequipment,BandBmethodsBusedBtoBprotectBaBworkerBonceBaBfa
llBhasBoccurred.



TheBtopBedgeBheightBofBaBguardrailBshouldBbeB_________Bin.BaboveBtheBwalking/wor
kingBsurface.B-BAnswerB42B+/-B3



WhatBareBsomeBcommonBhazardsBassociatedBwithBhotBwork?B-BAnswerB-
HealthBhazardsB(airBcontaminantsBfromBweldingBoperationsB[ironBoxide,Bzinc,Bberylliu
m,Bcopper],Bburns,BburnsBtoBtheBeyesBfromBflashes)

-PhysicalBhazardsB(trippingBfromBhoses)

-firesBandBexplosionsB(ignitingBgases,BimproperBstorage)

, WhatBareBsomeBcontrolsBforBtheBhazardsBcreatedBwhenBperformingBhotBwork?B-
BAnswerBProtectBorBremoveBfireBhazardsBinBtheBarea,BconfineBheat,Bsparks,BandBslag,
BfireBextinguishingBequipmentBavailable,Bventilation



WhatBareBsomeBcommonBelectricalBhazards?B-
BAnswerBExposedBelectricalBparts,BoverheadBpowerBlines,BinadequateBwiring,Bdefective
BorBdamagedBcordsBandBwires,BimproperBuseBofBflexibleBcords,BimproperBgrounding,B
overloadedBcircuits



WhatBareBsomeBcontrolsButilizedBforBelectricalBhazards?B-
BAnswerBTraining,Bplanning,Bgfci's,Bfuses,BcircuitBbreakers,BlockoutBtagout



WhatBareBsomeBcommonBhazardsBassociatedBwithBexcavations?B-
BAnswerBWeightB(nearbyBvehicles/equipment),Bvibration,BundergroundButilities,BwaterB
andBsoilBerosion.



WhatBisBaBsurchargeBload?B-
BAnswerBTheBspoilsBpileBandBtheBequipmentBbeingBtooBcloseBtoBtheBverticalBwallsBof
BtheBtrench.



WhatBareBsomeBcommonBcontrolsBusedBtoBmitigateBexcavationBhazards?B-
BAnswerBSloping,Bshoring,Bshields,BrpeBdesignedBprotectiveBsystems,BsoilBclassification.



WhatBareBsomeBcommonBhazardsBassociatedBwithBworkingBatBheights?B-
BAnswerBslipping,BunsafeBaccess,BlackBofBfallBprotection,BscaffoldBcollapse,BbadBplanki
ng,BunguardedBedges,



WhatBareBsomeBcontrolsBtoBmitigateBhazardsBwhenBworkingBatBheights?B-
BAnswerBFallBpreventionBequipment,Bguardrails,BpositioningBdeviceBsystem,BwarningBli
neBsystems,BcontrolledBaccessBzone,BsafetyBmonitoringBsystem,BpersonalBfallBarrestBsy
stem,BsafetyBnetBsystem