SOS BRAKE & BRAKING SYSTEM QUESTIONS AND CORRECT ANSWERS

SOS BRAKE & BRAKING SYSTEM
QUESTIONS AND CORRECT ANSWERS

InA2aA2singleA2anchorA2bendixA2drumA2typeA2rearA2brakeA2-A2Ans--
theA2secondaryA2liningA2isA2longerA2thanA2theA2primary

ComparedA2toA2theA2secondaryA2shoeA2liningA2areasA2ofA2drumA2brakes,A2theA2primaryA2s
hoeA2liningA2areaA2is:A2-A2Ans--smallerA2andA2goesA2towardA2theA2frontA2ofA2theA2car

DuringA2aA2brakeA2overhaul,A2youA2noticeA2thatA2theA2brakeA2fluidA2seemsA2toA2beA2veryA2
dirtyA2andA2darkA2inA2color.A2WhatA2shouldA2youA2do?A2-A2Ans--
flushA2theA2systemA2beforeA2theA2newA2partsA2areA2installed

InA2orderA2toA2bleedA2theA2systemA2onA2aA2vehicleA2equippedA2withA2powerA2brakes:A2-
A2Ans--NoneA2ofA2theA2above


WhichA2ofA2theA2followingA2couldA2beA2aA2symptomA2ofA2over-torquedA2lugA2nuts?A2-
A2Ans--AA2brakeA2pedalA2pulsationA2duringA2braking.


WhichA2ofA2theA2followingA2describesA2theA2properA2sequenceA2toA2bleedA2brakeA2linesA2o
nA2mostA2rearA2wheelA2driveA2vehicles:A2-A2Ans--RR,A2LR,A2RF,A2LF

InA2discA2brakeA2caliperA2assemblies,A2theA2"squareA2cutA2seal"A2isA2usuallyA2located:A2-
A2Ans--InA2theA2caliperA2pistonA2bore


WhenA2performingA2aA2caliperA2overhaul,A2whatA2wouldA2youA2useA2toA2removeA2theA2pist
onsA2fromA2theA2calipers?A2-A2Ans--CompressedA2air

SlidingA2caliperA2discA2brakeA2padsA2areA2keptA2inA2adjustmentA2byA2theA2-A2Ans--
SquareA2cutA2pistonA2seal

AA2crackedA2orA2tornA2vacuumA2diaphragmA2inA2aA2powerA2boosterA2wouldA2likelyA2cause:
A2-A2Ans--HardA2pedalA2withA2veryA2highA2effortA2required


WhenA2theA2brakesA2areA2appliedA2onA2aA2carA2withA2disc-
drumA2brakes,A2aA2vibrationA2orA2pulsatingA2movementA2isA2felt.A2WhatA2canA2causeA2thisA
2problem?A2-A2Ans--AA2rotorA2thicknessA2variation


WhileA2testA2drivingA2aA2car,A2theA2mechanicA2findsA2thatA2theA2rightA2frontA2brakeA2"grabs
".A2TheA2mostA2likelyA2causeA2ofA2thisA2problemA2is:A2-A2Ans--
BrakeA2fluidA2orA2greaseA2onA2theA2brakeA2linings.

, DuringA2aA2roadA2test,A2youA2findA2thatA2whenA2normalA2breakingA2pressureA2isA2appliedA2t
heA2pedalA2slowlyA2goesA2toA2theA2floor.A2WhatA2isA2theA2likelyA2causeA2ofA2thisA2problem?
A2-A2Ans--AA2leakingA2masterA2cylinderA2primaryA2pistonA2seal.


AA2rattleA2isA2aA2singleA2pistonA2discA2brakeA2assemblyA2whichA2goesA2awayA2whenA2theA2
brakesA2areA2appliedA2isA2mostA2likelyA2aA2resultA2of:A2-A2Ans--
LooseA2padsA2inA2theA2caliper

WhichA2ofA2theA2followingA2wouldA2mostA2likelyA2causeA2draggingA2brakes?A2-A2Ans--
AA2defectiveA2vehicleA2loadA2sensor

WithA2theA2carA2standingA2still,A2youA2canA2hearA2aA2squeakingA2noiseA2whenA2applyingA2t
heA2brakeA2pedalA2slowly.A2WhatA2couldA2causeA2thisA2noise?A2-A2Ans--
DryA2backingA2plateA2contactA2surfaces.

ThereA2isA2aA2scrapingA2soundA2comingA2fromA2oneA2rearA2brake.A2TheA2soundA2stopsA2w
henA2theA2brakesA2areA2applied.A2WhatA2isA2theA2likelyA2causeA2ofA2theA2problem?A2-
A2Ans--AA2brokenA2shoeA2hold-downA2springA2orA2pin


IfA2aA2drumA2brakeA2self-adjusterA2seizesA2up,A2theA2likelyA2resultA2willA2be:A2-A2Ans--
AA2lowA2pedal

WhichA2ofA2theA2followingA2canA2beA2usedA2toA2checkA2forA2rotorA2thicknessA2variation?A2-
A2Ans--DialA2indicator


OnA2aA2vehicleA2withA2aA2disc/
drumA2brakeA2system,A2theA2rearA2wheelsA2lockA2upA2underA2hardA2braking.A2TheA2mostA2l
ikelyA2causeA2is:A2-A2Ans--AA2defectiveA2proportioningA2valve

AfterA2puttingA2aA2bearingA2raceA2inA2aA2hub,A2youA2noticeA2thatA2theA2newA2raceA2isA2loos
eA2andA2canA2spinA2inA2theA2hub.A2WhatA2shouldA2youA2do?A2-A2Ans--ReplaceA2theA2hub

WhenA2adjustingA2disc-drumA2brakes,A2youA2should:A2-A2Ans--
AdjustA2theA2rearA2brakesA2afterA2releasingA2theA2parkingA2brakes

WhatA2typeA2ofA2rotorA2surfaceA2providesA2theA2bestA2brakingA2withA2newA2pads?A2-
A2Ans--AA2smooth,A2flatA2surface


WhichA2ofA2theA2followingA2isA2aA2quickA2wayA2toA2determineA2whetherA2theA2masterA2cylin
derA2isA2bad?A2ThereA2areA2noA2externalA2leaksA2inA2theA2system.A2-A2Ans--
PumpA2upA2theA2brakeA2pedal,A2thenA2holdA2itA2firm.A2IfA2theA2pedalA2slowlyA2dropsA2toA2th
eA2floor,A2theA2masterA2cylinderA2isA2bad.

YouA2areA2rebuildingA2aA2masterA2cylinder.A2WhatA2shouldA2youA2useA2toA2lubricateA2theA2i
nternalA2parts?A2-A2Ans--BrakeA2fluid