75 most common combination vehicle
questions with correct answers 2025
Thevairvleakagevratevforvavcombinationvvehiclevwithvthevenginevoffvandvbrakesvonvshou
ldvnotvbevmo revthan_____psivpervminute?v-vcorrect-answersv-4
Undervgoodvdrivingvconditionsvyouvshouldvleavevatvleastvonevsecondvofvspacevbetween
vyourvvehicl evandvthevvehiclevaheadvforvevery_______feetvofvyourvvehiclesvlength.v-
vcorrect-answersv-10
Semivtrailersvmadevbeforev1975vthatvarevequippedvwithvairvbrakes________v-vcorrect-
answersvOftenvdovnotvhavevspringvbreaks
Airvlinesvonvavcombinationvvehiclevarevoftenvcoloredvtovkeepvthemvfromvgettingvmixedv
up.vThevem ergencyvlinevis______thevservicevlinevis________v-vcorrect-answersv-Red/blue
Ifvthevbrakesvdidvnotvreleasevwhenvyouvputvthevtrailervairvsupplyvvalvesvyouvshouldvd
ovwhatvvcorrect-answersv-Checkvthevairlinevconnections
Youvsupplyvairvtovthevtrailervtanksvbyv-vcorrect-answersv-
Pushingvinvthevtrailervairvsupplyvvalve Whatvarevthevothervnamesvforvthevservicevline?v-
vcorrect-answersv-Controlvlinevandvsignalvline
Whenvyouvturnvsuddenlyvwhilevpullingvdoublesvwhichvtrailervisvmostvlikelyvtovturnvov
er?v-vcorrectanswersv-Thevrearvtrailervisvtwicevasvlikelyvtovturnvovervasvthevtractor
, Aftervyouvhavevcoupledvthevtrailervyouvshouldvstartvtovraisevthevlandingvgearvbyvusing
v(whichvgear)v -vcorrect-answersv-Lowvgear
Whatvgearvshouldvthevtractorvenginevbevinvaftervyouvuncoupledvthevtrailervandvarevinsp
ectingvthevt railervsupports?v-vcorrect-answersv-Neutral
Describevwhatvthevtrailervairvsupplyvdoesv-vcorrect-answersv-
Itvisvusedvtovsupplyvthevtrailervwithvair shutvthevairvoff
andvapplyvthevtrailervemergencyvbrakes
Youvarevcouplingvavtrailervtovavsemivtrailer.vYouvhavevconnectedvthevairlines.vBeforevba
ckingvundervt hevtrailer,vyouvshouldv-vcorrect-answersv-
Supplyvairvtovthevtrailervsystemvandvthenvpourvoutvthevairvsupplyvknob
Whenvcheckingvthevtrailervemergencyvbrakes,vmakevsurevthatvthevtractorvprotectionvcont
rolvbowvi svplacedvinvthe______positionv-vcorrect-answersv-Emergency
Youvarevcouplingvavtrailervtovavsemivtrailer.vYouvhavevbackedvupvbutvarevnotvyetvunde
rvit.vBeforevbac kingvundervthevsemivtrailer,vyouvshouldvhookvupv-vcorrect-
answersvThevemergencyvandvservicevairvlines
Atvnight,vwhenvavvehiclevisvcarryingvavloadvthatvextendsv4vfeetvorvmorevbeyondvthevre
arvofvthevbody
,vtherevmustvbe_____atvthevextremevendvofvthevloadv-vcorrect-answersv-Redvlights
Howvshouldvyouvtestvthevtractorvsemivtrailervconnectionvforvsecurityv-vcorrect-answersv-
Pullvgentlyvforwardvinvavlowvgearvagainstvthevlotvtrailervbrakes;vthenvlookvatvitvcarefull
y
Thevtractorvprotectionvvalvevwillvclosevandvthevtrailer_brakesvwillvcomevonvwhenvtherev
isvavmajorvl eakvinvthevbrakevlinev-vcorrect-answersv-Emergency
questions with correct answers 2025
Thevairvleakagevratevforvavcombinationvvehiclevwithvthevenginevoffvandvbrakesvonvshou
ldvnotvbevmo revthan_____psivpervminute?v-vcorrect-answersv-4
Undervgoodvdrivingvconditionsvyouvshouldvleavevatvleastvonevsecondvofvspacevbetween
vyourvvehicl evandvthevvehiclevaheadvforvevery_______feetvofvyourvvehiclesvlength.v-
vcorrect-answersv-10
Semivtrailersvmadevbeforev1975vthatvarevequippedvwithvairvbrakes________v-vcorrect-
answersvOftenvdovnotvhavevspringvbreaks
Airvlinesvonvavcombinationvvehiclevarevoftenvcoloredvtovkeepvthemvfromvgettingvmixedv
up.vThevem ergencyvlinevis______thevservicevlinevis________v-vcorrect-answersv-Red/blue
Ifvthevbrakesvdidvnotvreleasevwhenvyouvputvthevtrailervairvsupplyvvalvesvyouvshouldvd
ovwhatvvcorrect-answersv-Checkvthevairlinevconnections
Youvsupplyvairvtovthevtrailervtanksvbyv-vcorrect-answersv-
Pushingvinvthevtrailervairvsupplyvvalve Whatvarevthevothervnamesvforvthevservicevline?v-
vcorrect-answersv-Controlvlinevandvsignalvline
Whenvyouvturnvsuddenlyvwhilevpullingvdoublesvwhichvtrailervisvmostvlikelyvtovturnvov
er?v-vcorrectanswersv-Thevrearvtrailervisvtwicevasvlikelyvtovturnvovervasvthevtractor
, Aftervyouvhavevcoupledvthevtrailervyouvshouldvstartvtovraisevthevlandingvgearvbyvusing
v(whichvgear)v -vcorrect-answersv-Lowvgear
Whatvgearvshouldvthevtractorvenginevbevinvaftervyouvuncoupledvthevtrailervandvarevinsp
ectingvthevt railervsupports?v-vcorrect-answersv-Neutral
Describevwhatvthevtrailervairvsupplyvdoesv-vcorrect-answersv-
Itvisvusedvtovsupplyvthevtrailervwithvair shutvthevairvoff
andvapplyvthevtrailervemergencyvbrakes
Youvarevcouplingvavtrailervtovavsemivtrailer.vYouvhavevconnectedvthevairlines.vBeforevba
ckingvundervt hevtrailer,vyouvshouldv-vcorrect-answersv-
Supplyvairvtovthevtrailervsystemvandvthenvpourvoutvthevairvsupplyvknob
Whenvcheckingvthevtrailervemergencyvbrakes,vmakevsurevthatvthevtractorvprotectionvcont
rolvbowvi svplacedvinvthe______positionv-vcorrect-answersv-Emergency
Youvarevcouplingvavtrailervtovavsemivtrailer.vYouvhavevbackedvupvbutvarevnotvyetvunde
rvit.vBeforevbac kingvundervthevsemivtrailer,vyouvshouldvhookvupv-vcorrect-
answersvThevemergencyvandvservicevairvlines
Atvnight,vwhenvavvehiclevisvcarryingvavloadvthatvextendsv4vfeetvorvmorevbeyondvthevre
arvofvthevbody
,vtherevmustvbe_____atvthevextremevendvofvthevloadv-vcorrect-answersv-Redvlights
Howvshouldvyouvtestvthevtractorvsemivtrailervconnectionvforvsecurityv-vcorrect-answersv-
Pullvgentlyvforwardvinvavlowvgearvagainstvthevlotvtrailervbrakes;vthenvlookvatvitvcarefull
y
Thevtractorvprotectionvvalvevwillvclosevandvthevtrailer_brakesvwillvcomevonvwhenvtherev
isvavmajorvl eakvinvthevbrakevlinev-vcorrect-answersv-Emergency
