CDL COMBINATION VEHICLES TEST QUESTIONS WITH CORRECT ANSWERS 2025

CDL COMBINATION VEHICLES TEST
QUESTIONS WITH CORRECT ANSWERS 2025
HowMshouldMyouMtestMtheMtractorMsemiMtrailerMcombinationMforMbeingMproperlyMcoupled?M-
MCORRECTMANSWER-


PullMgentlyMforwardMinMlowMgearMagainstMtheMlockedMtrailerMbrakes,MthenMinspectMyourMcoupling.



WhenMcouplingMtoMtheMtrailer,MhowMfarMdoMyouMbackMupMbeforeMstoppingMtheMfirstMtime?M-
MCORRECTMANSWER-UntilMtheMfifthMwheelMplateMjustMtouchesMtheMtrailer.




WhatMdoMyouMcheckMbeforeMbackingMunderMtheMtrailer?M-MCORRECTMANSWER-
MakeMsureMtheMtrailerMbrakesMareMset.



AirMlinesMonMaMcombinationMvehicleMareMoftenMcoloredMtoMkeepMthemMfromMgettingMmixedMup.M
WhatMcolorMisMtheMemergencyMlineMandMwhatMcolorMisMtheMserviceMline?M-MCORRECTMANSWER-
RedMandMblue.



AfterMyouMbackMupMtoMtheMtrailerMandMtheMfifthMwheelMplateMtouchesMtheMtrailer,MyouMsetMtheMtra
ctorMparkMbrake,MgetMoutMandMhookMupMtheMemergencyMandMserviceMairMlines.MThenMwhatMdoMyo
uMdoMbeforeMbackingMunderMtheMtrailer?M-MCORRECTMANSWER-
SupplyMairMtoMtheMtrailerMsystem,MthenMpullMoutMtheMtrailerMairMsupplyMknobMtoMfullyMsetMtheMtrai
lerMbrakes.



WhatMthreeMthingsMcanMyouMdoMtoMpreventMrollovers?M-MCORRECTMANSWER-
KeepMyourMloadMcentered,MkeepMtheMloadMasMlowMinMtheMtrailerMasMpossible,MandMgoMslowMaroun
dMturns.



HowMfarMdoMyouMraiseMtheMlandingMgearMonMyourMtrailer?M-MCORRECTMANSWER-
CrankMitMupMasMfarMasMitMwillMgo.

, YouMhaveMcoupledMwithMaMsemiMtrailer.MInMwhatMpositionMshouldMyouMputMtheMlandingMgearMbefo
reMdrivingMaway?M-MCORRECTMANSWER-
FullyMraisedMwithMtheMcrankMhandleMsecuredMinMitsMbracket.



WhenMuncoupling,MwhatMcouldMhappenMifMyouMparkMtheMtrailerMatManMangle?M-
MCORRECTMANSWER-YouMcouldMdoMdamageMtoMtheMlandingMgearMandMdollyMlegs.




WhyMshouldMyouMlockMtheMtractorMgladMhandsMtogetherMorMcoupleMthemMtoMtheMdummyMgladMha
ndsMwhenMbobtailing?M-MCORRECTMANSWER-ItMwillMkeepMdirtMandMwaterMoutMofMtheMlines.



WhenMbackingMunderMaMtrailer,MyouMshouldMexpectMtheMtrailerMtoMbeMliftedMslightlyMbyMtheMfifthM
wheelMplate.M-MCORRECTMANSWER-True.



BeforeMyouMbeginMcoupling,MyouMshouldMcheckMyourMtravelMpathMforMobstaclesMandMhazards.M-
MCORRECTMANSWER-True.




WhatMshouldMyourMairMsupplyMpressureMgaugeMreadMbeforeMbackingMunderMaMtrailer?M-
MCORRECTMANSWER-100M-M125Mpsi.




InMcaseMofMaMjackknifeMsituation,MyouMcanMuseMyourMtrailerMhandMvalveMtoMapplyMtrailerMbrakesMt
oMstopMtheMtrailerMfromMskidding.M-MCORRECTMANSWER-False.



WhichMknobMdoMyouMactuateMtoMsupplyMairMtoMyourMtrailer?M-MCORRECTMANSWER-
PushMinMonMtheMtractorMprotectionMvalveMknob,MwhichMisMtheMredMknob.



DoMcombinationMvehiclesMtakeMlongerMtoMstopMwhenMtheyMareMemptyMorMloaded?M-
MCORRECTMANSWER-WhenMtheyMareMempty.