answers 2025
1.vOnvavcarvwithvdisc/drumvbrakes,vthevfrontvbrakesvgrab
quicklyvwhenvlightvpedalvpressurevisvapplied.vThisvproblem
couldvbevcausedvbyvavbad:
A.vproportioningvvalve
B.vpressurevsafetyvswitch
C.vmeteringvvalve
D.vresidualvcheckvvalvev-vcorrect-answersv-C
2.vThevdrivervofvavvehiclevwithvpowervdisc/drumvbrakes
saysvthatvthevbrakevpedalvmovesvslowlyvtovthevfloorvwhile
maintainingvpedalvpressurevatvavstoplight.vWhatvcould
causevthisvproblem?
A.vleakingvprimaryvpistonvcupvinvmastervcylinder
B.vleakingvpowervbrakevbooster
C.vleakingvresidualvcheckvvalvevinvmastervcylinder
D.vinternalvleakvinvthevcombinationvvalvev-vcorrect-answersv-A
,3.vWhichvofvthevfollowingvwouldvMOSTvLIKELYvhappen
ifvthevmeasurementsvtakenvfromvthevcheckvshownvabove
variedvfromvthevmanufacturer'svspecifications?
A.vnoisyvbrakevoperation
B.vbrakevgrabvorvpull
C.vpulsatingvbrakevpedal
D.vlowvbrakevpedalv-vcorrect-answersv-C
4.vWhatvisvthevpurposevofvthevmastervcylindervresidual
checkvvalve(s)vonvvehiclesvequippedvwithvdrumvbrakes?
A.vallowsvthevdrivervtovpumpvupvthevbrakes
B.vpreventsvairvfromventeringvthevhydraulicvsystem
C.vpreventsvwheelvlockupvbyvreducingvthevhydraulic
pressure
D.vreducesvpedalvpulsationvbyvcontrollingvhydraulic
pressurev-vcorrect-answersv-B
5.vAvtechnicianvhasvjustvoverhauledvthevfrontvbrakesvonva
vehiclevwithvfrontvdiscvandvrearvdrumvbrakes.vHowever,vwhen
hevattachesvavpressurevbleederv(pressurizedvtovaboutv25
psi)vtovthevmastervcylinder,vhevcannotvgetvanyvfluidvtovcome
outvofvthevdiscvbrakevcalipervbleedervscrews.vWhichvofvthe
followingvisvMOSTvLIKELYvthevcause?
A.vbadvproportioningvvalve
B.vbadvpressurevdifferentialvvalve
,C.vproportioningvvalvevreleasevbuttonvnotvactivated
D.vmeteringvvalvevreleasevbuttonvnotvactivatedv-vcorrect-answersv-D
6.vOnvavvehiclevwithvsinglevpistonvfloatingvcalipervfrontvdisc
brakes,vthevbrakevpadsvonvthevleftvsidevofvthevvehiclevare
almostvcompletelyvwornvwhilevthevrightvsidevisvalmostvnew.
TechnicianvAvsaysvthatvtoovmuchvrotorvrunoutvcouldvbe
thevcause.vTechnicianvBvsaysvthatvavbindingvcalipervpiston
couldvbevthevcause.vWhovisvright?
A.vTechnicianvAvonly
B.vTechnicianvBvonly
C.vBothvAvandvB
D.vNeithervAvorvBv-vcorrect-answersv-B
7.vWhatvisvthevpurposevofvthevbarvthatvisvbeingvremoved
fromvthevbrakevassemblyvshownvbelow?
A.vtovequalizevthevbrakingvforcevbetweenvthevshoes
duringvnormalvbraking
B.vtovcentervthevshoesvafterveachvbrakevapplication
C.vtovforcevthevshoesvintovthevdrumvwhenvthevparking
brakesvarevapplied
D.vtovreducevthevdistancevbetweenvthevshoesvandvthe
drumv-vcorrect-answersv-C
8.vAvhydraulicvbrakevlinevisvleaking.vWhichvofvthevfollowingvis
thevcorrectvrepairvprocedure?
, A.vCutvoutvthevbadvsectionvandvreplacevwithvnewvsteel
tubingvusingvcompressionvfittings.
B.vReplacevthevleakingvlinevwithvdouble-flared,vseamless
coppervtubing.
C.vCutvoutvthevbadvsectionvandvreplacevwithvsingle-flared
steelvtubingvusingvflarevnutsvandvunions.
D.vReplacevthevleakingvlinevwithvdouble-flaredvsteel
tubing.v-vcorrect-answersv-D
9.vThevset-upvshownvabovevisvusedvtovcheck:v(dialvindicatorvonvrotorvface)
A.vrotorvparallelism
B.vwheelvbearingvadjustment
C.vrotorvlateralvrunout
D.vrotorvfacevwearv-vcorrect-answersv-C
10.vWhichvofvthevfollowingvproblemsvwouldvbevcausedvby
usingvavresidualvcheckvvalvevinvavdiscvbrakevmastervcylinder?
A.vreducedvbrakevpedalvtravel
B.vreducedvbrakevsystemvpressure
C.vincreasedvbrakevpadvwear
D.vincreasedvrotorvrunoutv-vcorrect-answersv-C
11.vAvcustomervcomplainsvthatvtheirvvehiclevpullsvtovthe
rightvwhenvthevbrakesvarevapplied.vTechnicianvAvsays
avrestrictedvbrakevlinevtovthevleftvcalipervcanvcausevthis
problem.vTechnicianvBvsaysvavmalfunctioningvproportioning