ASE A5 – BRAKES QUESTIONS WITH CORRECT ANSWERS 2025

ASE A5 – BRAKES QUESTIONS WITH
CORRECT ANSWERS 2025
OnMaMcarMwithMdisc/drumMbrakes,MtheMfrontMbrakesMgrabMquicklyMwhenMlightMpedalMpressureMisMapplied.
MThisMproblemMcouldMbeMcausedMbyMaMbad:



A.MProportioningMvalve

B.MPressureMsafetyMswitch

C.MMeteringMvalve

D.MResidualMcheckMvalveM-MCORRECTMANSWERM-
TheMcorrectManswerMisMC.MTheMmeteringMvalveMdelaysMtheMflowMofMbrakeMfluidMtoMtheMfrontMcalipersMunti
lMtheMpressureMinMtheMsystemMrisesMtoMaMpointMwhereMtheMwheelMcylinderMcanMovercomeMtheMtensionMo
fMtheMbrakeMshoeMreturningMspring.MTheMpurposeMisMtoMhaveMbothMfrontMandMrearMbrakesMapplyMsimulta
neously.MThisMpreventsMtheMfrontMbrakesMfromMlockingMupMduringMlightMbrakeMapplications.



TheMdriverMofMaMvehicleMwithMpowerMdisc/drumMbrakesMsaysMthatMtheMbrakeMpedalMmovedMslowlyMtoMth
eMfloorMwhileMmaintainingMpedalMpressureMatMaMstoplight.MWhatMcouldMcauseMthisMproblem?

A.MLeakingMprimaryMpistonMcupMinMmasterMcylinder

B.MLeakingMpowerMbrakeMbooster

C.MLeakingMresidualMcheckMvalveMinMmasterMcylinder

D.MInternalMleakMinMtheMcombinationMvalveM-MCORRECTMANSWERM-
TheMcorrectManswerMisMA.MifMtheMprimaryMpistonMcupMinMtheMmasterMcylinderMisMleaking,MpressureMwillMn
otMbuildMupMaheadMofMtheMprimaryMpistonMtoMincreaseMpressureMtoMtheMrearMbrakes.MTheMpistonMwillMth
enMmoveMforwardMuntilMtheMspringMisMcompressedMenoughMtoMmoveMtheMsecondaryMpiston.MConsequent
ly,MthisMinternalMleakMwillMcauseMtheMbrakeMpedalMtoMslowlyMdropMtoMtheMfloor.



WhatMisMtheMpurposeMofMtheMmasterMcylinderMresidualMcheckMvalve(s)MonMvehiclesMequippedMwithMdrum
Mbrakes?



A.MAllowedMtheMdriverMtoMpumpMupMtheMbrakes

B.MPreventsMairMfromMenteringMtheMhydraulicMsystem

C.MPreventsMwheelMlockupMbyMreducingMtheMhydraulicMpressure

D.MReducesMpedalMpulsationMbyMcontrollingMhydraulicMpressureM-MCORRECTMANSWERM-
TheMcorrectManswerMisMB.MResidualMcheckMvalve(s)MareMusedMonMdrumMbrakesMtoMkeepMresidualMlowMpres
sureM(slightMstaticMpressure)MinMtheMbrakeMsystemMatMallMtimesMevenMwhenMtheMbrakeMpedalMisMreleased.
MThisMpressureM(5-

,20Mpsi)MkeepsMtheMlipsMofMtheMwheelMcylinderMpistonMcupsMtightMagainstMtheMcylinderMwallsMtoMpreventM
airMfromMenteringMtheMsystemMwhenMatMrestM(brakesMreleased).



AMtechnicianMhasMjustMoverhauledMtheMfrontMbrakesMonMaMvehicleMwithMfrontMdiscMandMrearMdrumMbrake
s.MHowever,MwhenMheMattachesMaMpressureMbleederM(pressurizedMtoMaboutM25Mpsi)MtoMtheMmasterMcylind
er,MheMcannotMgetManyMfluidMtoMcomeMoutMofMtheMdiscMbrakeMcaliperMbleederMscrews.MWhichMofMtheMfoll
owingMisMMOSTMLIKELYMtheMcause?

A.MBadMproportioningMvalve

B.MBadMpressureMdifferentialMvalve

C.MproportioningMvalveMreleaseMbuttonMnotMactivated

D.MMeteringMvalveMreleaseMbuttonMnotMactivatedM-MCORRECTMANSWERM-
TheMcorrectManswerMisMD.MAMmeteringMvalveMrequiresMaMminimumMpressureM(typicallyM75-
125Mpsi)MtoMopen.MAtMthisMpointMpressurizedMfluidMflowsMtoMtheMfrontMcalipers.MSinceMtheMbleederMtankMi
sMonlyMpressurizedMtoM25Mpsi,MfluidMpressureMisMtooMlowMtoMopenMtheMmeteringMvalveMduringMthisMproce
dure,MTherefore,MwhenMyouMuseMaMpressureMbleederMonMaMsystemMwithMaMmeteringMvalve,MyouMmustMm
anuallyMkeepMtheMvalveMopenMbyMeitherMpushingMtheMbuttonMinMtheMendMofMtheMvalve,MorMpullingMtheMst
emMoutwardMonMtheMendMofMtheMvalve.



OnMaMvehicleMwithMsingleMpistonMfloatingMcaliperMfrontMdiscMbrakes,MtheMbrakeMpadsMonMtheMleftMsideMof
MtheMvehicleMareMalmostMcompletelyMwornMwhileMtheMrightMsideMisMalmostMnew.MTechMAMsaysMthatMtooM

muchMrotorMrunoutMcouldMbeMtheMcause.MTechMBMsaysMthatMaMbindingMcaliperMpistonMcouldMbeMtheMcaus
e.MWhoMisMright?

A.MTechnicianMAMonly

B.MTechnicianMBMonly

C.MBothMAMandMB

D.MNeitherMAMorMBM-MCORRECTMANSWERM-
TheMcorrectManswerMisMB.MExcessiveMrotorMrunoutMwouldMcauseMaMpulsatingMbrakeMpedal,MbutMnotMunev
enMside-to-
sideMpadMwear.MAMfrozenMcaliperMpistonMonMtheMotherMhand,MwillMkeepMbothMinnerMandMouterMbrakeMpa
dsMequallyMappliedMagainstMtheMrotorMevenMwhenMtheMbrakeMpedalMisMreleased.MThisMconstantMfrictionM
willMcauseMrapidMpadMwearMinMtheMaffectedMcaliperMasMwellMasMtheMfront-endMpull



AMhydraulicMbrakeMlineMisMleaking.MWhichMofMtheMfollowingMisMtheMcorrectMrepairMprocedure?

A.MCutMoutMtheMbadMsectionMandMreplaceMwithMnewMsteelMtubingMusingMcompressionMfittings.

B.MReplaceMtheMleakingMlineMwithMdouble-flared,MseamlessMcopperMtubing.

, C.MCutMoutMtheMbadMsectionMandMreplacedMwithMsingle-flaredMsteelMtubingMusingMflareMnutsMandMunions.

D.MReplaceMtheMleakingMlineMwithMdouble-flaredMsteelMtubing.M-MCORRECTMANSWERM-
TheMcorrectManswerMisMD.MSteelMtubingMofMtheMsameMsize,Mtype,MandMlengthMwithMdoubleMflaredMendsMm
ustMbeMusedMwhenMreplacingMaMtraditionalMSAEMdoubleMinvertedMflairMstyleMhydraulicMbrakeMline.



WhichMofMtheMfollowingMproblemsMwouldMbeMcausedMbyMusingMaMresidualMcheckMvalveMinMaMdiscMbrakeM
masterMcylinder?

A.MReducedMbrakeMpedalMtravel

B.MReducedMbrakeMsystemMpressure

C.MIncreasedMbrakeMpadMwear

D.MIncreasedMrotorMrunout.M-MCORRECTMANSWERM-
TheMcorrectManswerMisMC.MIfMaMresidualMcheckMvalveMwasMinstalledMinMaMdiscMbrakeMmasterMcylinder,MitMw
ouldMcauseMincreasedMbrakeMpadMwearMsinceMtheMresidualMbrakeMpressureMwouldMcauseMtheMcaliperMpist
onsMtoMkeepMtheMpadsMappliedMevenMwhenMtheMbrakeMpedalMisMreleased.



AMcustomerMcomplainsMthatMtheirMvehicleMpullsMtoMtheMrightMwhenMtheMbrakesMareMapplied.MTechnicianM
AMsaysMaMrestrictedMbrakeMlineMtoMtheMleftMcaliperMcanMcauseMthisMproblem.MTechnicianMBMsaysMaMmalfun
ctioningMproportioningMvalveMisMprobablyMtheMcause.MWhoMisMright?

A.MTechnicianMAMonly

B.MTechnicianMBMonly

C.MBothMAMandMB

D.MNeitherMAMorMBM-MCORRECTMANSWERM-
TheMcorrectManswerMisMA.MAMrestrictionMinMtheMbrakeMlineMwillMcauseMaMdropMinMfluidMpressureMtoMtheMaf
fectedMcaliper.MThisMwillMcauseMtheMcaliperMtoMbeMunableMtoMexertMtheMsameMforceMagainstMtheMpadsMasM
theMunrestrictedMside.MbecauseMofMthis,MtheMvehicleMwillMpullMtoMtheMsideMwhereMtheMpressureMisMhighes
tMandMbrakeMforceMisMgreatest.MInMthisMcase,MthatMwouldMbeMtheMrightMside.



WithMfootMpressureMapplied,MtheMbrakeMpedalMonMaMvehicleMwithMvacuumMassistedMpowerMbrakesMmove
sMdownMslightlyMwhenMtheMengineMisMstarted.MTechMAMsaysMthatMthisMconditionMcanMbeMcausedMbyMaMleak
ingMpowerMbrakeMboosterMdiaphragm.MTechMBMsaysMthatMtheMcauseMcouldMbeMaMfaultyMpowerMbrakeMboo
sterMcheckMvalve.MWhoMisMright?

A.MTechnicianMAMonly

B.MTechnicianMBMonly

C.MBothMAMandMB