CDL AIR BRAKE PRACTICE TEST QUESTIONS WITH CORRECT ANSWERS

CDL AIR BRAKE PRACTICE TEST
QUESTIONS WITH CORRECT ANSWERS
TheJHparkingJHorJHemergencyJHbrakeJHonJHaJHheavyJHvehicleJHcanJHonlyJHbeJHheldJHinJ
HpositionJHbyJHsomethingJHthatJHcannotJHleakJHaway,JHlike:


a.JHFluidJHpressure
b.JHSpringJHpressure
c.JHAirJHpressure
d.JHAnyJHofJHtheJHaboveJH-JHANS--b.JHSpringJHpressure

AJHstraightJHtruckJHorJHbusJHairJHbrakeJHsystemJHshouldJHnotJHleakJHatJHaJHrateJHofJHm
oreJHthanJH__JHpsiJHperJHminuteJHwithJHtheJHengineJHoffJHandJHtheJHbrakeJHreleased.

a.JH1
b.JH2
c.JH3
d.JH4JH-JHANS--c.JH3

YourJHvehicleJHhasJHdualJHairJHbrakeJHsystem.JHIfJHlowJHairJHpressureJHwarningJHcome
sJHonJHforJHtheJHsecondaryJHsystemJHorJHforJHoneJHsystem,JHyouJHshould:

a.JHBringJHtheJHvehicleJHtoJHaJHsafeJHstopJHandJHcontinueJHonlyJHwhenJHtheJHsystemJHi
sJHfixed.
b.JHReduceJHyourJHspeed,JHandJHtestJHtheJHremainingJHsystemJHwhileJHunder-way.
c.JHReduceJHyourJHspeed,JHandJHdriveJHtoJHtheJHnearestJHgarageJHforJHrepairs.
d.JHContinueJHatJHnormalJHspeedJHifJHonlyJHtheJHsecondaryJHsystemJHfails.JH-JHANS--
a.JHBringJHtheJHvehicleJHtoJHaJHsafeJHstopJHandJHcontinueJHonlyJHwhenJHtheJHsystemJHi
sJHfixed.

IfJHyourJHvehicleJHhasJHanJHalcoholJHevaporator,JHitJHisJHthereJHto:

a.JHRidJHtheJHwetJHtankJHofJHalcoholJHthatJHcondensesJHandJHsitsJHatJHtheJHbottom.
b.JHEliminateJHtheJHneedJHforJHdailyJHtankJHdraining.
c.JHBoostJHtankJHpressureJHtheJHsameJHwayJHthatJHsuperchargersJHboostJHengines.
d.JHReduceJHtheJHriskJHofJHiceJHinJHtheJHairJHbrakeJHvalvesJHinJHcoldJHweather.JH-
JHANS--d.JHReduceJHtheJHriskJHofJHiceJHinJHtheJHairJHbrakeJHvalvesJHinJHcoldJHweather.


AirJHbrakingJHtakesJHmoreJHtimeJHthanJHhydraulicJHbecauseJHair:

a.JHBrakesJHuseJHdifferentJHbrakeJHdrums.
b.JHTakesJHmoreJHtimeJHtoJHflowJHthroughJHtheJHlinesJHthanJHhydraulicJHfluid.
c.JHBrakesJHrequireJHheavierJHreturnJHsprings.

, d.JHIsJHalwaysJHleakingJHthroughJHairlineJHfittings.JH-JHANS--
b.JHTakesJHmoreJHtimeJHtoJHflowJHthroughJHtheJHlinesJHthanJHhydraulicJHfluid.

TheJHbrakeJHpedalJHinJHanJHairJHbrakeJHsystem:

a.JHControlsJHtheJHspeedJHofJHtheJHairJHcompressor.
b.JHAlwaysJHneedsJHtoJHbeJHheldJHdownJHhalfwayJHduringJHnormalJHdriving.
c.JHControlsJHtheJHairJHpressureJHappliedJHtoJHputJHonJHtheJHbrakes.
d.JHIsJHconnectedJHtoJHslackJHadjustersJHbyJHaJHseriesJHofJHrodsJHandJHlinkages.JH-
JHANS--c.JHControlsJHtheJHairJHpressureJHappliedJHtoJHputJHonJHtheJHbrakes.


WithJHairJHbrakeJHvehicles,JHtheJHparkingJHbrakesJHshouldJHbeJHused:

a.JHWheneverJHyouJHleaveJHtheJHvehicleJHunattended.
b.JHToJHholdJHyourJHspeedJHwhenJHgoingJHdownhill.
c.JHAsJHlittleJHasJHpossible.
d.JHOnlyJHduringJHpreJHandJHpost-tripJHinspections.JH-JHANS--
a.JHWheneverJHyouJHleaveJHtheJHvehicleJHunattended.

ForJHemergencyJHstabJHbraking,JHyouJHshould:

a.JHPumpJHtheJHbrakeJHpedalJHrapidlyJHandJHlightly.
b.JHPressJHonJHtheJHbrakeJHpedalJHasJHhardJHasJHyouJHcan,JHreleaseJHtheJHbrakesJHwh
enJHtheJHwheelsJHlock,JHandJHwhenJHtheJHwheelsJHstartJHrollingJHputJHonJHtheJHbrakesJ
HfullyJHagain.
c.JHBrakeJHhardJHuntilJHtheJHwheelsJHlock,JHthenJHgetJHoffJHtheJHbrakesJHforJHasJHmuch
JHtimeJHasJHtheJHwheelsJHwereJHlocked.
d.JHPressJHhardJHonJHtheJHbrakeJHpedalJHandJHapplyJHfullJHhandJHvalveJHuntilJHyouJHsto
p.JH-JHANS--
b.JHPressJHonJHtheJHbrakeJHpedalJHasJHhardJHasJHyouJHcan,JHreleaseJHtheJHbrakesJHwh
enJHtheJHwheelsJHlock,JHandJHwhenJHtheJHwheelsJHstartJHrollingJHputJHonJHtheJHbrakesJ
HfullyJHagain.


IfJHyourJHtruckJHorJHbusJHhasJHdualJHparkingJHcontrolJHvalves,JHyouJHcanJHuseJHpressur
eJHfromJHaJHseparateJHtankJHto:

a.JHReleaseJHtheJHspringJHemergency/
JHparkingJHbrakesJHtoJHmoveJHaJHshortJHdistance.
b.JHApplyJHmoreJHbrakeJHpressureJHifJHtheJHmainJHtankJHisJHgettingJHlow.
c.JHStayJHparkedJHtwiceJHasJHlongJHwithJHyourJHserviceJHairJHpressure.
d.JHBalanceJHtheJHserviceJHbrakeJHsystemJHwheneverJHyouJHareJHparked.JH-JHANS--
a.JHReleaseJHtheJHspringJHemergency/
JHparkingJHbrakesJHtoJHmoveJHaJHshortJHdistance.


ModernJHairJHbrakesJHsystemsJHcombineJHthreeJHdifferentJHsystems.JHTheyJHareJHtheJH
service,JHparking,JHandJHtheJH_________JHbrakes.