CDL Air Brake Practice Test Exam
Questions With 100% Correct Answers
Theiparkingioriemergencyibrakeioniaiheavyivehicleicanionlyibeiheldiinipo
sitionibyisomethingithaticannotileakiaway,ilike:
a.iFluidipressure
b.iSpringipressure
c.iAiripressure
d.iAnyiofitheiabovei-iCorrectiAnswer-b.iSpringipressure
Aistraightitruckioribusiairibrakeisystemishouldinotileakiatiairateiofimoreit
hani__ipsiiperiminuteiwithitheiengineioffianditheibrakeireleased.
a.i1
b.i2
c.i3
d.i4i-iCorrectiAnswer-c.i3
Yourivehicleihasidualiairibrakeisystem.iIfilowiairipressureiwarningicomesi
oniforitheisecondaryisystemioriforioneisystem,iyouishould:
, a.iBringitheivehicleitoiaisafeistopiandicontinueionlyiwhenitheisystemiisifi
xed.
b.iReduceiyourispeed,ianditestitheiremainingisystemiwhileiunder-way.
c.iReduceiyourispeed,iandidriveitoitheinearestigarageiforirepairs.
d.iContinueiatinormalispeediifionlyitheisecondaryisystemifails.i-
iCorrectiAnswer-
a.iBringitheivehicleitoiaisafeistopiandicontinueionlyiwhenitheisystemiisifi
xed.
Ifiyourivehicleihasianialcoholievaporator,iitiisithereito:
a.iRiditheiwetitankiofialcoholithaticondensesiandisitsiatitheibottom.
b.iEliminateitheineediforidailyitankidraining.
c.iBoostitankipressureitheisameiwayithatisuperchargersiboostiengines.
d.iReduceitheiriskiofiiceiinitheiairibrakeivalvesiinicoldiweather.i-
iCorrectiAnswer-
d.iReduceitheiriskiofiiceiinitheiairibrakeivalvesiinicoldiweather.
Airibrakingitakesimoreitimeithanihydraulicibecauseiair:
a.iBrakesiuseidifferentibrakeidrums.
b.iTakesimoreitimeitoiflowithroughitheilinesithanihydraulicifluid.
c.iBrakesirequireiheavierireturnisprings.
Questions With 100% Correct Answers
Theiparkingioriemergencyibrakeioniaiheavyivehicleicanionlyibeiheldiinipo
sitionibyisomethingithaticannotileakiaway,ilike:
a.iFluidipressure
b.iSpringipressure
c.iAiripressure
d.iAnyiofitheiabovei-iCorrectiAnswer-b.iSpringipressure
Aistraightitruckioribusiairibrakeisystemishouldinotileakiatiairateiofimoreit
hani__ipsiiperiminuteiwithitheiengineioffianditheibrakeireleased.
a.i1
b.i2
c.i3
d.i4i-iCorrectiAnswer-c.i3
Yourivehicleihasidualiairibrakeisystem.iIfilowiairipressureiwarningicomesi
oniforitheisecondaryisystemioriforioneisystem,iyouishould:
, a.iBringitheivehicleitoiaisafeistopiandicontinueionlyiwhenitheisystemiisifi
xed.
b.iReduceiyourispeed,ianditestitheiremainingisystemiwhileiunder-way.
c.iReduceiyourispeed,iandidriveitoitheinearestigarageiforirepairs.
d.iContinueiatinormalispeediifionlyitheisecondaryisystemifails.i-
iCorrectiAnswer-
a.iBringitheivehicleitoiaisafeistopiandicontinueionlyiwhenitheisystemiisifi
xed.
Ifiyourivehicleihasianialcoholievaporator,iitiisithereito:
a.iRiditheiwetitankiofialcoholithaticondensesiandisitsiatitheibottom.
b.iEliminateitheineediforidailyitankidraining.
c.iBoostitankipressureitheisameiwayithatisuperchargersiboostiengines.
d.iReduceitheiriskiofiiceiinitheiairibrakeivalvesiinicoldiweather.i-
iCorrectiAnswer-
d.iReduceitheiriskiofiiceiinitheiairibrakeivalvesiinicoldiweather.
Airibrakingitakesimoreitimeithanihydraulicibecauseiair:
a.iBrakesiuseidifferentibrakeidrums.
b.iTakesimoreitimeitoiflowithroughitheilinesithanihydraulicifluid.
c.iBrakesirequireiheavierireturnisprings.