HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE QUESTIONS WITH CORRECT ANSWERS

HEAVY TRUCK BRAKES MICHIGAN
MECHANIC STUDY GUIDE QUESTIONS
WITH CORRECT ANSWERS

ANJHENGINEJHBRAKEJH(JACOBSJHBRAKE)JH-JHANS--A.JHISJHAJHSELF-
ENERGIZINGJHSERVOJHTYPE.
B.JHISJHNORMALLYJHUSEDJHINJHPLACEJHOFJHAJHSPRINGJHBRAKE.
C.JHRESTRICTSJHTHEJHINTAKEJHPORTJHANDJHCAUSESJHAJHBUILDJHUPJHOFJH30-
45JHLBSJHOFJHPRESSURE.
D.JHOPENSJHTHEJHEXHAUSTJHVALVESJHNEARJHTHEJHTOPJHOFJHTHEJHCOMPRES
SIONJHSTROKEJHTOJHRELEASEJHTHEJHCOMPRESSEDJHAIR.JH(CORRECTJHAWNS
ER)

INJHTHEJHSYSTEMJHSHOWNJHBELOW,JHTHEJHPARTJHATJHCJHIS:JH-JHANS--
A.JHANJHINVERSIONJHVALVE.JH(POSSIBLEJHCORRECTJHAWNSER)
B.JHAJHSAFETYJHVALVE.
C.JHAJHMODULATORJHVALVE.JH(NOTJHCORRECTJHAWNSER)
D.JHAJHRELAYJHVALVE.

AJHMECHANICJHHASJHREMOVEDJHAJHBRAKEJHDRUMJHANDJHFOUNDJHTHEJHBRAK
EJHLININGSJHSOAKEDJHWITHJHGREASE.JHTHEJHBRAKEJHLININGSJHSHOULDJHBE:J
H-JHANS--A.JHREPLACED.JH(CORRECTJHAWNSER)
B.JHSANDEDJHTOJHROUGHENJHUPJHTHEJHFRICTIONJHSURFACE.
C.JHDIPPEDJHINJHLACQUERJHTHINNER.
D.JHWASHEDJHWITHJHDENATUREDJHALCOHOL.

INJHTHEJHDRAWINGJHBELOW,JHTHEJHPARKINGJHBRAKESJHAREJHAPPLIEDJHBY:JH-
JHANS--A.JHAIRJHPRESSUREJHATJHPOINTJHF.
B.JHVACUUMJHINJHAREAJHB.
C.JHSPRINGJHATJHPOINTJHC.
D.JHPRESSUREJHINJHAREAJHA.JH(NOTJHCORRECTJHAWNSER)

WHATJHISJHTHEJHPURPOSEJHOFJHAJHVACUUMJHBOOSTER?JH-JHANS--
A.JHTOJHDECREASEJHBRAKEJHPEDALJHEFFORT.JH(POSSIBLEJHCORRECTJHAWNS
ER)
B.JHTOJHPREVENTJHFADEJHUNDERJHHEAVYJHBRAKING.
C.JHTOJHPROVIDEJHASSISTANCEJHWHENJHTHEJHENGINEJHVACUUMJHISJHLOW.JH(
NOTJHCORRECTJHAWNSER)
D.JHTOJHMAINTAINJHUNIFORMJHPEDALJHTRAVELJHASJHTHEJHLININGSJHWEAR.

THEJHTRAILERJHBRAKESJHDOJHNOTJHWORK.JHTHEJHTRACTORJHSYSTEMJHISJHATJ
HNORMALJHPRESSURE.JHTHEREJHAREJHNOJHLEAKSJHANDJHTHEJHSERVICEJHAND

, HEAVY TRUCK BRAKES MICHIGAN
MECHANIC STUDY GUIDE QUESTIONS
WITH CORRECT ANSWERS
JHEMERGENCYJHLINESJHAREJHHOOKEDJHUPJHRIGHT.JHWHATJHCOULDJHCAUSEJH
THISJHPROBLEM?JH-JHANS--A.JHICEJHINJHTHEJHLINESJHATJHTHEJHTRAILER.
B.JHAJHBADJHRELAYJHVALVE.
C.JHAJHBADJHSAFETYJHRELIEFJHVALVE.
D.JHBOTHJHAJHANDJHB.JH(CORRECTJHAWNSER)

THEJHRESIDUALJHVALVEJHINJHTHEJHMASTERJHCYLINDER:JH-JHANS--
A.JHLIMITSJHPRESSUREJHBUILDJHUPJHINJHTHEJHSYSTEM.
B.JHSTOPSJHTHEJHFLOWJHTOJHDAMAGEDJHBRAKEJHLINES.
C.JHKEEPSJHSOMEJHPRESSUREJHINJHTHEJHSYTEMJHWHENJHTHEJHBRAKESJHAREJ
HRELEASED.JH(CORRECTJHAWNSER)
D.JHISJHOPERATEDJHBYJHENGINEJHVACUUM.

HIGHERJHTHANJHNORMALJHAIRJHPRESSUREJHWOULDJHLIKELYJHBEJHCAUSEDJHB
Y:JH-JHANS--
A.JHAJHGOVENORJHTHATJHISJHBADJHORJHOUTJHOFJHADJUSTMENT.JH(POSSIBLEJH
CORRECTJHAWNSER)
B.JHAJHPLUGGEDJHSAFETYJHVALVE.JH(NOTJHCORRECTJHAWNSER)
C.JHAJHONE-WAYJHCHECKJHVALVEJHSTUCKJHOPEN.
D.JHAJHSTICKYJHQUICKJHRELEASEJHVALVE.

IFJHGLADHANDJH2JHISJHUNHOOKEDJHORJHHASJHAJHSEVEREJHLEAK,JHWHATJHWIL
LJHHAPPENJHDURINGJHOPERATION?JH-JHANS--
A.JHVALVEJHATJHAJHWILLJHPROTECTJHTHEJHPRESSUREJHINJHTHEJHDRYJHTANK.
B.JHTRACTORJHBRAKESJHWILLJHAPPLYJHAUTOMATICALLY.JH(NOTJHCORRECTJHA
WNSER)
C.JHVALVEJHATJHCJHWILLJHAPPLYJHTRAILERJHBRAKES.
D.JHVALVEJHATJHBJHWILLJHAPPLYJHTRAILERJHBRAKES.

DURINGJHAJHHARDJHSTOP,JHONEJHBRAKEJHHASJHLOCKEDJHONJHAJHTRAILERJHWI
THJH"S"JHCAMJHBRAKES.JHTHEJHSERVICEJHANDJHEMERGENCYJHLINESJHAREJHHO
OKEDJHUPJHPROPERLYJHANDJHTHEJHSYSTEMJHISJHATJHNORMALJHPRESSUREJHB
UTJHTHEJHBRAKESJHWILLJHNOTJHRELEASE.JHWHATJHISJHTHEJHLIKELYJHCAUSEJH
OFJHTHISJHPROBLEM?JH-JHANS--
A.JHTHEJHSERVICEJHBRAKEJHCHAMBERJHDIAPHRAGMJHHASJHSPLIT.JH(POSSIBLE
JHCORRECTJHAWNSER)
B.JHTHEJHCAMJHHASJHROLLEDJHOVERJHDUEJHTOJHTOOJHMUCHJHLININGJHWEAR.
C.JHTHEJHANTI-
LOCKJHMODULEJHHASJHBURNEDJHOUTJHATJHTHEJHSENDINGJHUNIT.JH(NOTJHCOR
RECTJHAWNSER)
D.JHTHEJHCHAMBERJHSPRINGJHHASJHRUSTEDJHANDJHISJHBROKEN.