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8/3/2019 School Bus Tests
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The OfficialASE Study Guide
ASE SchoolBus Tests
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ASE School BuS TESTS
Overview ................................................................................................38
School Bus Tests ...................................................................................943
BodySystemsandSpecialEquipment(TestS1) ............................9
DieselEngines(TestS2) ...............................................................13
DriveTrain(TestS3).....................................................................20
Brakes(TestS4) ............................................................................25
SuspensionandSteering(TestS5)................................................30
Electrical/ElectronicSystems(TestS6) ........................................35
AirConditioningSystemsandControls(TestS7)........................40
Industry Training ............................................................................... 4447
Table of Contents
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ASE School BuSStudyGuidE PAGE3
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IntroductionTheOfcial ASE Study Guide for the School Bus Testsisintendedtohelptechni-
ciansstudyfortheASEcerticationtests.Thespecicmaterialabouteachtest,
includedinthebookletisausefultoolforreviewingthetechnicalknowledgethatiscoveredintheSchool Bus tests.Afterperformingathoroughreview,itshould
beeasiertoselectadditionalreferencematerialthatwillassistyouwiththetest
preparationneeds.
ASEvoluntarycerticationisameansbywhichtechnicianscanprovetheir
abilitiestothemselves,totheiremployers,andtotheircustomers.Bypassing
ASEtestsyouwillearnthemostvaluablecredentialavailabletoschoolbus
technicians.Becausethetestsaretough,youllhavethesatisfactionofproving
toyourselfthatyouareamongtheeliteinyourprofession.Whatsmore,thesecredentialsarerecognizedthroughoutthenation.
Certiedtechnicianspromotecustomertrustandimprovetheimageofthe
industry.Andtrustandprofessionalismaretherststepstoabetter,morepros -
perousbusiness.
ASEencouragesyoutotakethetestsandtojointheprovenproswhowear
theASEBlueSealofExcellence.
How Do I Become Certifed?TherearecurrentlyseventestsintheSchoolBusTechniciancerticationseries.
Ifyoupassoneormoretests,andhaveatleasttwoyearsofhands-onworking
experienceinschoolbusrepair,thenyouwillbecomecertiedasanASESchool
BusTechnician.(Appropriatevocationaltrainingmaybesubstitutedforupto
oneyearofworkexperience.)
IfyoupasstestsS1throughS6,andmeettheexperiencerequirement,you
willearnthecerticateofMasterSchoolBusTechnician.
IfyouarecurrentlycertiedinDieselEngines(A9,H2,S2,orT2)
andElectrical/ElectronicSystems(A6,H6,S6,orT6),youareeligibletotake
theL2ElectronicDieselEngineDiagnosisSpecialisttest.
Ifyoufailatest,youmaytakeitagainduringanyscheduledtestadmin-
istrationinwhichitisoffered.Andremember,youaretheonlyonewhowill
receiveyourtestsscores;resultswillnotbegivenoverthephonenorwilltheybe
releasedtoanyonewithoutyourwrittenpermission.
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School Bus Tests
ASEtestsandcertiestechniciansinthefollowingSchoolBusareas: Body Systems and Special Equipment (Test S1)
DieselEngines(TestS2)
DriveTrain(TestS3)
Brakes(TestS4)
SuspensionandSteering(TestS5)
Electrical/ElectronicSystems(TestS6)
AirConditioningSystemsandControls(TestS7)
ASEalsoofferscerticationinAutomobile,Medium/HeavyTruck,
TruckEquipment,CollisionRepair/Renish,TransitBus, Parts Specialist
andAdvancedLevelspecialties.SeparateStudy Guidesareavailablefor
eachtestseries.
ForfullinformationonASEtestingaswellasdownloadableStudy Guides,
Registration Booklets,andmore,visitwww.ase.com.Youmayalsorequest
Registration BookletsbymailingthecouponlocatedonthebackcoverofthisbookletorbycallingASEat703-669-6600,ext.400.
Who Writes the Questions?Thequestions,writtenbyserviceindustryexpertsfamiliarwithallaspectsof
schoolbusrepair,areentirelyjob-related.Theyaredesignedtotestknowledge
oftheskillsthatyouneedinservicingschoolbuses;theoreticalknowledgeisnot
covered.
EachquestionhasitsrootsinanASEitem-writingworkshopwhereservicerepresentativesfromschoolbusmanufacturers,aftermarketpartsand
equipmentmanufacturers,workingtechniciansandtechnicaleducatorsmeetin
aworkshopsettingtoshareideasandtranslatethemintotestquestions.Each
testquestionwrittenbytheseexpertsmustsurvivereviewbyallmembersofthe
group.Thequestionsarewrittentodealwithpracticalproblemsofdiagnosisand
repairexperiencedbytechniciansintheirday-to-daywork.
Fromthere,allquestionsarepre-testedandquality-checkedonanational
sampleoftechnicians.ThosequestionsthatmeetASEstandardsofqualityandaccuracyareincludedinthescoredsectionsofthetests;therejectsaresent
backtothedrawingboardordiscardedaltogether.
Eachcerticationtestismadeupofbetween45and55multiple-choice
questions.Thetestingsessionsare4hoursand15minutes,allowingplenty
oftimetocompleteseveraltests.
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Note: Eachtestcouldcontainuptofteenadditionalquestionsthatareincluded
forstatisticalresearchpurposesonly.Youranswerstothesequestionswillnot
affectyourscore,butsinceyoudonotknowwhichonestheyare,youshould
answerallquestionsinthetest.
How Do I Prepare or the ASE Tests?Becomefamiliarwithtestcontentandquestionformat:TheTestSpecications
inthisbookletcontainasummarydescriptionofthecontentcoveredbyeach
test.TheTaskListsdescribetheactualworkperformedbytechniciansineach
specialtyarea.Together,theseformablueprintforwritingandassemblingthe
ASEtests.
Pleasenotethateachquestiononthetestiskeyed,orlinked,toaparticulartask
orsetoftasksinthetasklist.Therefore,areviewofthetasklists,withaneye
tojudgingwhetheryouknowhowtoperformeachtasklisted,willprovideyou
valuableinformationasyouprepareforthetests.
Therearevetypesofmultiple-choicequestionsonthetests,eachofwhich
isincludedinthesamplequestionsinthisbooklet.Notethedifferentinstructions
forsomequestions. Besuretoreadeachquestioncarefully,(twice,ifnecessary)sothatyou
understandexactlywhatisbeingasked.Each question tests a specic diagnostic
or repair problem and has only one correct answer.
Tosummarize,wesuggestthefollowingstepsbetakentoprepareforthe
tests:
Step 1. Studythecontentlistforeachtestyouwillattempt.
Step2. Carefullyreadthetasklistforeacharea.
Step3. Gooverthesamplequestionstobecomefamiliarwitheach
questiontype.Thisisveryimportant.
Step4. Reviewsteps1through3andidentifytheskillarea(s)where
youneedadditionalstudy.
Types o Knowledge Measured By the TestsThetypesofknowledgeandskillsyouwillneedtoknowtopassthetestsareas
follows:
Basictechnicalknowledge:Testsyourknowledgeofwhatisinasystemand
howthesystemworks,andwhataretheproperproceduresandprecautionsto
befollowedinmakingrepairsandadjustments.
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Serviceorrepairknowledgeandskill:Testsyourunderstandingandability
toapplygenerallyacceptedrepairproceduresandprecautionsinassembly,
disassembly,andreconditioningoperations;andinmakinginspectionsand
adjustments.Alsotestsabilitytouseshopmanualsandprecisiontoolsofthe
trade.
Testinganddiagnosticknowledgeandskill: Testsyourabilitytorecognize
problemsandtousegenerallyavailablemeasurementandtestingequipment
tomakeadiagnosis.Alsotestsyourabilitytotracetheeffectsofaparticular
conditionandndthecauseofaparticularsetofsymptoms.
Ifyouareanexperiencedandcompetenttechnician,acarefulreviewofthisbooklet,andadditionalbrush-uponthoseareasinwhichyouareweakest,isall
youshouldneedtopasstheASEtests.
Beore The TestsTrytobewell-restedforthetestsoyouwillbealertandefcient.Ifyouaretak-
ingthewrittenversions,pleasebringseveralsharpenedsoft-lead(#2)pencilsand
aneraserwithyou;pencilswillnotbefurnishedatthetestcenter.Ifyouwishto
paceyourself,bringawatch;sometestingroomsmaynothaveclocks.Finally,besuretobringalongyourtestcenteradmissionticketandacurrentphotoI.D.
At the Test CenterSome TipsArriveearlyenoughtondthebuildingandtestingroom.Whenyoureachthe
location,waitintheassignedareauntiltheproctorbeginsthetestadministration.
Heorshewillinstructyouinllingouttheanswerbooklet(iftakingwritten
tests)orloggingontothecomputer(iftakingcomputer-basedtests).
Oncetestinghasbegun,keeptrackoftime.Donotspendtoolongonanysinglequestion.Besuretoreadeachquestioncarefullysothatyouunderstand
exactlywhatisbeingasked.Donotmarkanswersinthetestbooklet;theymust
bemarkedontheanswerbooklet.Yourtestwillnotbescoredifyouranswersare
notonyouranswerbooklet.
Ifaquestionisdifcult,marktheanswerthatyouthinkiscorrectandput
acheckbyitinthetestbook.(Computer-basedtestsallowyoutodothison
screen.)Thengoontothenextquestion.Ifyounishbeforetimeisup,youmay
gobacktothequestionsthatyouchecked. Itistoyouradvantagetoanswereveryquestion.Donotleaveany
answersblank.Yourscorewillbebasedonlyonthenumberofcorrect
answersthatyougive.
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ASE School BuSStudyGuidE PAGE7
Test Content and Sample Questions
ThefollowingmaterialisdesignedtohelptechnicianspreparefortheASE
certicationtests.
EachsectionbeginswiththeTestSpecications,whichwilllistthemain
categoriescoveredonthatparticulartestandthenumberoftestquestionsand
percentageofthetestdevotedtoeachtopic.
TheTaskListdescribestheworkactivitiesatechnicianshouldbeableto
performineachtechnicalareacoveredonthattest.Thislistwasdevelopedby
workingtechniciansandtechnicalexpertsfromacrossthecountryandwillpro-
videavaluablechecklistofwhattostudyforthetest. Thesetaskdescriptionsofferdetailedinformationtotechnicianspreparing
forthetestandtopersonswhomaybeinstructingtechnicians.Thetasklistsmay
alsoserveasguidelinesforquestionwriters,reviewers,andtestassemblers.
Itshouldalsobenotedthatthenumberofquestionsineachcontentareamay
notequalthenumberoftaskslisted.Someofthetasksarecomplexandbroad
inscopeandmaybecoveredbyseveralquestions.Othertasksaresimpleand
narrowinscopeandonequestionmaycoverseveraltasks.Themainobjective
inlistingthetasksistodescribeaccuratelywhatisdoneonthejob,nottomake
eachtaskcorrespondtoaparticulartestquestion.
Samplequestionsfollow.Althoughthesesamequestionswillnotappearon
actualtests,theyareinthesameformatasactualtestquestions.Allvetypesof
multiple-choicequestionsusedontheASEtestsarerepresentedhere.Notethe
differentinstructionsforsomequestions.
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School Bus Types Found on ASE Certifcation Tests
TheTypeAschoolbusisaconversionorbodyconstructeduponavan-type
orcutawayfront-sectionvehiclewithaleft-sidedriversdoor,designedfor
carryingmorethan10personswithagrossvehicleweightrating(GVWR)of
10,000poundsorless.
The Type Bschoolbusisaconversionorbodyconstructedandinstalledupon
afront-sectionvehiclechassis,orstrippedchassis,withagrossvehicleweight
rating(GVWR)ofmorethan10,000pounds,designedforcarryingmorethan10
persons.Partoftheengineisbeneathand/orbehindthewindshieldandbeside
thedriversseat.Theentrancedoorisbehindthefrontwheels.TheTypeCschoolbusisabodyinstalleduponaat-backcowlchassiswitha
grossvehicleweightrating(GVWR)ofmorethan10,000pounds,designedfor
carryingmorethan10persons.Theentireengineisinfrontofthewindshield
andtheentrancedoorisbehindthefrontwheels.
TheTypeDschoolbusisabodyinstalleduponachassis,withtheengine
mountedinthefront,midship,orrearwithagrossvehicleweightrating
(GVWR)ofmorethan10,000pounds,anddesignedforcarryingmorethan
10persons.Theenginemaybebehindthewindshieldandbesidethedrivers
seat;itmaybeattherearofthebus,behindtherearwheels.Theentrancedoor
isaheadofthefrontwheels.
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TEST SpEcificATionSAnd TASkliSTBodySySTEmSAnd SpEciAl EquipmEnT (TEST S1)
Content Questions PercentageArea in Test of Test
A. Safety and Emergency Equipment Systems
Diagnosis and Repair 10 20%
B. Body and Interior Maintenance 14 28%
C. Installed Special Equipment Diagnosis
and Repair 10 20%
D. Heating Systems Diagnosis and Repair 16 32%
Total 50 100%
A. Saety and Emergency Equipment Systems Diagnosis and Repair (10 questions) 1. Inspectsafetyequipmentconditionandsecurity;serviceorreplaceasrequired
(reextinguisher,rstaidkit,bodyuidcleanupkit,reectivetriangles,seatbelt
cutter,etc.).
2. Checkconditionandoperationofseatbelts/tetherbelts,retractor,latchanddriver/
passengerrestraintsystems;repairorreplaceasrequired.
3. Inspect,adjust,lubricate,repairorreplaceemergencyexits,doors,hatches,hold-open
devices,latches,hinges,handles,decals,andseals.
4. Checkoperationofstoparm(s)andcrossinggate(air-operated,vacuum,orelectric)
warningdevices;serviceorreplaceasneeded. 5. Inspect,test,adjust,repairorreplaceelectricalcomponentsintheemergencyexit
warningsystems(roofhatches,push-outwindows,doors,etc.).
6. Inspect,test,andreplacereectors,reectivematerials,andlettering.
B. Body and Interior Maintenance (14 questions) 1. Inspectupholstery,foam,seatframe,andmountinghardwareofpassengerseats
(includingtrack,ip,childseats,etc.);repairorreplaceasrequired.
2. Inspect,diagnose,test,adjust,repairorreplaceupholstery,foam,seatframe(airand
manual,etc.)andmountinghardwarefordriversseat.
3. Inspectoor,oorcovering,stepwell,wheelhouse,andmoldings;repairorreplace
asneeded.
4. Inspect,adjust,repairorreplaceentrydoors,liftdoors,andhandrails.
5. Checkmirrorsforclarity,mountingsecurity,andcondition;repairorreplaceasrequired.
6. Inspect,adjust,repairorreplacebodymountingbolts,clips(tiedowns),outriggers,
shearbolts,crossmembers(oorsills),cowlmounts,andaccessorycompartments
(battery,luggage)inaccordancewithmanufacturersrecommendedprocedures.
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7. Inspectchassisframeforcracks,breaks,distortion,looseness,anddamage;determine
neededrepairs.
8. Checkalignmentandsecurityofenginecoverandseals;adjust,service,repairorreplaceasrequired.
9. Inspect,test,adjust,repairorreplacemanual,electric,orair-operatedentrydoor
controlsincludingtheemergencyreleasesystems.
10. Inspectwindshield,windowglass,frame,sashandlatches;repairorreplaceas
necessary.
C. Installed Special Equipment Diagnosis and Repair (10 questions) 1. Checkoperationofwheelchairliftsystemscontrols(electrical,hydraulic,ormechan-
ical)andbackupsystems;adjust,repairorreplaceasneeded. 2. Inspectstructuralintegrityofwheelchairliftplatform,mountingdevices,handrails,
andsafetybarriers;repairorreplaceaccordingtomanufacturersrecommendations.
3. Inspectconditionandsecurityofwheelchairtrackandtiedowns,andwheelchair
passengerseatbelt(restraint)systems.
D. Heating Systems Diagnosis and Repair (16 questions) 1. Diagnosethecauseoftemperaturecontrolproblemsintheheating/ventilating/
defrostingsystem;determineneededrepairs.
2. Diagnosewindowfoggingproblems;determineneededrepairs.
3. Performcoolingsystemtests,includingfreezeprotection;determineneededrepairs. 4. Inspect,test,andreplaceheatercoolantcontrolvalve(manual,vacuum,and
electricaltypes).
5. Inspect,ush,andreplaceheatercore,hoses,clamps,andcovers;bleedthesystem.
6. Performheatingsystemteststoincludecorrectow,boosterpumpoperation,and
restrictors.
7. Checkconditionofheaterltersandexteriorofheatercore;cleanorreplace
accordingtomanufacturersrecommendations.
8. Inspect,diagnose,test,repair,andreplaceheater/defrosterblowersanddefogger
fans,resistors,switches,relay/modules,sensors,wiring,connectors,andprotectiondevices.
9. Inspect,diagnose,test,service,orreplaceheating,ventilating,anddefrostingcontrol
panelassemblies,cables,andlinkages.
10. Inspect,diagnose,test,andreplaceheating,ventilating,anddefrostingsystem
vacuumcontrolswitchesandhoses,diaphragms,vacuumpumps,vacuumreservoir,
checkvalves,anddrivebelts.
11. Inspect,test,adjust,repair,orreplaceheating/ventilating/defrostingducts,doors,
hoses,andoutlets.
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quESTionS:
1. Anair-operatedstoparmwillnotfullyextend.Whichoftheseisthemost
likelycause? *(A)Lowairpressure
(B)Bindinghingepivots
(C)Astickingsolenoidvalve
(D)Abrokenreturnspringpivot
2. Areplacementstudentwindowsideglassshould:
(A)betempered.
*(B)meetFMVSSrequirements. (C)belaminated.
(D)bereplacedbyaglasscompany.
3. Whichoftheseisthebestlocationforaschoolbusrstaidkit?
(A)Theoorbythestepwell
(B)Ontherearemergencydoor
(C)Inthetoolbox
*(D)Inthedriversarea
4. TechnicianAsaysthatthepHlevelshouldbecheckedduringacoolanttest.
TechnicianBsaysthatthefreezepointshouldbecheckedduringacoolanttest.
Whoisright?
(A)Aonly *(C)BothAandB
(B)Bonly (D)NeitherAnorB
5. Afterabrokenheaterhoseisrepaired,therightsideofthewindshieldwillnot
defrost.Themostlikelycauseis:
(A)thesystemwasoverlled.
*(B)airistrappedinthesystem.
(C)thereplacementcoolantwasimproperlymixed.
(D)theheaterlterwasinstalledbackwards.
SAmplE quESTionSBodySySTEmSAnd SpEciAl EquipmEnT (TEST S1)
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6. OnatypeCschoolbus,thedefrosterblowerworksonlowandmediumspeed,
butnotonthehighspeed.Themostlikelycauseisa:
(A)badcircuitbreaker.
*(B)badcontrolswitch.
(C)looseground.
(D)cloggedheaterlter.
Question 7 is not like the ones above.
IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcould
NOTcausethedescribedsituation.Readtheentirequestioncarefullybeforechoosingyouranswer.
7. Awheelchairlifthasadrifting/leakdownproblem.Allofthesecouldbethe
causeEXCEPT:
(A)anopenmanualvalve.
*(B)lowuidlevel.
(C)abadseal.
(D)abadhydraulicpump.
S1 SAmplE quESTionS (conTinuEd)
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TEST SpEcificATionSAnd TASkliSTdiESEl EnginES (TEST S2)
Content Questions PercentageArea in Test of Test
A. General Engine Diagnosis 15 27%
B. In-Chassis Engine Inspection and Repair 6 11%
C. Lubrication and Cooling Systems
Diagnosis and Repair 7 13%
D. Air Induction and Exhaust Systems
Diagnosis and Repair 9 16%
E. Fuel System Diagnosis and Repair 15 27%
F. Starting System Diagnosis and Repair 3 6%
Total 55 100%
A. General Engine Diagnosis (15 questions) 1. Verifythecomplaint,androadtestvehicle;reviewpastmaintenancedocuments
(ifavailable);checkfortechnicalservicebulletins(TSBs),determinefurther
diagnosis.
2. Inspectengineassemblyandcompartmentforfuel,oil,coolant,andotherleaks;
determineneededrepairs.
3. Isolateanddiagnoseenginenoises;determineneededrepairs. 4. Checkengineexhaustodor,smokecolor,density(opacity)andquantity;determine
neededrepairs.
5. Performfuelsystemtests(fuelpressure,volume,fuellevel,quality,contamination);
determineneededrepairs.
6. Performairintakesystemrestrictionandleakagetest;determineneededrepairs.
7. Performintakemanifoldboostpressuretest;determineneededrepairs.
8. Performexhaustbackpressuretests;determineneededrepairs.
9. Performcrankcasepressuretest;determineneededrepairs.
10. Diagnosenocranking,cranksbutfailstostart,hardstarting,andstartsbutdoesnotcontinuetorunproblems;determineneededrepairs.
11. Diagnosesurging,roughoperation,misring,lowpower,slowdeceleration,slow
acceleration,andengineshutoffproblems;determineneededrepairs.
12. Isolateanddiagnoseenginerelatedvibrationproblems;determineneededrepairs.
13. Checkcoolingsystemforcoolanttype,freezepoint,boilingpoint,contamination,
coolantlevel,temperature,pressure,conditionerconcentration(supplementalcoolant
additive),ltration,andfanoperation;determineneededrepairs.
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14. Checklubricationsystemforcontamination,oillevel,temperature,pressure,
ltration,andoilconsumption;determineneededrepairs.Changeoilandlters.
15. Connectdiagnostictooltovehicle/engineandverifysoftwaretocheck,record,andclearactiveandinactivediagnostictroublecodes(DTCs);monitorelectronicengine
data.
B. In-Chassis Engine Inspection and Repair (6 questions) 1. Remove,clean,inspect,andreinstallcylinderhead(s)assembly.
2. Inspectcylinderheadthreadedholes,studs,andboltsforservice-ability;service/
replaceasneeded.
3. Measurecylinderheaddeck-to-deckthicknessandmatingsurfaceareasforwarpage;
inspectforcracks/damage;checkconditionofpassages;inspectcoreandgalleryplugs;serviceasneeded.
4. Inspectandreplaceinjectorsleevesandseals/0-ringswherespeciedby
manufacturer.
5. Inspectvalvesprings,retainers,and/orrotaters,locksandseals,determineneeded
repairs.
6. Inspectpushrods,rockerarms,rockerarmshafts,andbracketsforwear,bending,
cracks,looseness,andblockedoilpassages;repair/replaceasneeded.
7. Inspect,replacecamfollowers.
8. Inspect,measureandreplacecamshaft;measure/adjustendplay;measurelobeforlift. 9. Inspect,replace,andtimetheenginegeartrain(includescheckinggearwearand
backlashofcamshaft,auxiliary,andidlergears).
10. Adjustvalveclearanceandinjectorsettings.
11. Inspect,service,andinstallpans,covers,vents,enginedrivenaccessories,mounts
andsupports,gaskets,seals,andwearrings.
12. Cleanandinspectengineblockassemblyforcracks,andmatingsurfaceareasfor
damageorwarpage;checkconditionofpassages,core,andgalleryplugs;inspect
threadedholes,studs,dowelpinsandboltsforserviceability;service/replaceas
needed.13. Measurelinerheight(protrusion)andcounterboredepth;determineneededrepairs.
14. Inspect,measure,service/replacecrankshaftvibrationdamperandywheel.
15. Inspectcylinderwallsorliners,pistonsandringsforwearanddamage;determine
neededservice.
C. Lubrication and Cooling Systems Diagnosis and Repair (7 questions) 1. Verifyengineoilpressureandcheckpressuregauge,sendingunit,andwarning
devices.
2. Inspect,measure,repair/replaceoilpump,drives,inletpipes,andscreens.
3. Inspect,repair/replaceoilpressureregulatorvalve(s),bypassvalve(s),andlters. 4. Inspect,clean,test,reinstall/replace,oilcooler;test,reinstall/replacebypassvalve
andoilthermostatvalve;inspectandrepair/replacelinesandhoses.
5. Inspectandcleanturbochargerlubricationsystem;replaceasneeded.
6. Inspect,reinstall/replace,drivebelts,pulleys,idlerpulleys,andautomatictensioners;
checkalignmentandadjustdrivebelts.
7. Verifycoolanttemperatureandchecktemperaturegauge,sendingunit,andwarning
devices.
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8. Inspectandreplacecoolantthermostat(s),bypasses,housing(s),andseals.
9. Flushandrellcoolingsystemwithcorrectcoolanttype;bleedairfromsystem.
10. Inspect,repair/replacecoolantconditioner(supplementalcoolantadditive)lter,checkvalves,lines,andttings.
11. Inspect,repair/replacewaterpumpandhoses.
12. Inspectandcleanradiator,pressurecap,andtank(s);determineneededservice.
13. Inspect,repair/replacefanhub,fan,fanclutch,fancontrols,fanthermostat,andfan
shroud.
14. Inspect,repair/replaceradiatorcoverings,(includingshutterassembly,controls,
andwinterfronts).
15. Inspect,test,repair/replacecomponentsofengineblockheatersystems.
D. Air Induction and Exhaust Systems Diagnosis and Repair (9 questions) 1. Inspect,service/replaceairinductionpiping,aircleaner,andelement;checkforair
restriction;checkoperationofairrestrictionindicatorandhousingdrainvalve.
2. Inspect,test,andrepair/replaceturbocharger(s)(includingvariableratio/geometry
VGT),pneumatic,hydraulic,electroniccontrols,andactuators;inspect,test,and
replacewastegateandwastegatecontrols.
3. Inspect,repair/replaceintakemanifold,gaskets,temperatureandpressuresensors,
andconnections.
4. Inspect,test,clean,replacechargeaircoolerandpipingsystem. 5. Inspect,repair/replaceexhaustmanifold,gaskets,piping,mufers,exhaustaftertreat-
mentdevices,(includingthree-wayandoxidationcatalystanddieselparticulatelters
DPF)andmountinghardware.
6. Inspect,test,andrepair/replacepreheater/inletairheater,orglowplugsystemand
controls.
7. Inspect,test,andreplaceexhaustaftertreatmentregenerationsystemandcontrols.
8. Inspect,test,service,andreplaceEGRsystemcomponents;includingEGRvalve,
cooler,piping,lter,sensors,controls,andwiring.
E. Fuel System Diagnosis and Repair (15 questions) 1. Inspect,repair/replacefueltank,vent,cap,mounts,tankprotection(cages),valves,
screen,supplylines,returnlines,ttings,andseals.
2. Inspect,clean,test,repair/replacefueltransfer(lift)pump,pumpdrives,screens,
fuel/waterseparators/indicators,lters,heaters,andassociatedmountinghardware.
3. Checkfuelsystemforair;determineneededrepairs.
4. Primeandbleedfuelsystem;check,repair/replaceprimerhandpump.
5. Inspect,adjust,repair/replacethrottlecontrollinkage.
6. Performon-engineinspections,tests,adjustments,andtime,orreplacerotary-type
andinlineinjectionpumps. 7. Performon-engineinspections,tests,andadjustments,orreplacefuelinjectors.
8. Inspectandtestair/fuelratiocontrolsandtimingadvancemechanisms;determine
neededrepairs.
9. Inspect,reinstall/replacehigh-pressureinjectionlines,ttings,andseals.
10. Inspect,test,adjust,repair/replaceenginefuelshutoffdevicesandcontrols.
11. Useascantool,digitalmultimeter(DMM),and/orPC-baseddiagnostictoolto
inspectortestelectronicenginecontrolsystemsensors,actuators,circuits,harnesses,
andelectroniccontrolmodule(ECM);determineneededrepairs.
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S2 TASkliST (conTinuEd)
12. Inspect,adjust,repair/replaceelectronicthrottlecontrols.
13. Performon-engineinspectionsandtestsonhydraulicelectronicunitinjectors
(HEUI)andsystemcontrols(commonrailorrailpressurecontrol)andelectronicunitinjectionsystemcontrols.
14. Diagnoseenginelowpowerproblemscausedbyrelatedelectronictransmission
andtractioncontrolsystems.
15. Inspect,test,andreplaceelectricalconnectorterminals,pins,harnesses,deals,
andlocks.
F. Starting System Diagnosis and Repair (3 questions) 1. Performbatterystate-of-chargetest,chargebattery(s)asneeded,loadtest;determine
neededservice. 2. Startvehicleusingjumpercables,boosterbattery,orauxiliarypowersupply.
3. Inspect,cleanbatterycablesandterminals;performbatterycablevoltagedroptest.
4. Inspect,test,andreinstall/replacestarterrelays,safetyswitch(s),vandallocksystem,
andsolenoids.
5. Performstartercurrentdrawtest;determineneededrepairs.
6. Performstartercircuitvoltagedroptests;determineneededrepairs.
7. Removeandreplacestarter.
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quESTionS:
1. AdrivercomplainsthataTypeCschoolbushasexcessiveblacksmokewhen
startedinthemorning.Whichofthesecouldbethecause? *(A)Abadfuelinjectionnozzle
(B)Arestrictedfuellter
(C)Ablockedfueltankvent
(D)Aleakingfuelreturnline
2. Thedrivercomplainsthattheschoolbuswillnotcrank.Themostlikely
causeis:
(A)Loosestarterbolts *(B)Anopenvandallockcircuit
(C)Ashortedstartergroundcable
(D)Thegearselectorleftinneutral
3. Aschoolbusenginerepeatedlythrowsofftheengineaccessorydrivebelts.
Whichoftheseisthemostlikelycause?
(A)Wornpulleygroves
(B)Anover-tighteneddrivebelt (C)Loosedrivelineyokes
*(D)Anout-of-balancecrankshaftvibrationdamper
4. Anin-linesixcylinderdieselenginehasablownheadgasket.
TechnicianAsaysthatthecylinderheadshouldbecheckedforcracks.
TechnicianBsaysthatcylinderlinerprotrusionshouldbechecked.
Whoisright?
(A)Aonly (B)Bonly
*(C)BothAandB
(D)NeitherAnorB
SAmplE quESTionSdiESEl EnginES (TEST S2)
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PAGE18 ASE S chool BuSStudyGuidE
5. Duringacoldweatherstart-up,theoillterruptures,causinganoilleak.
Thiscouldbecausedby:
*(A)Astuck-closedoillterbypassvalve
(B)Astuck-openoilpressureregulatorvalve
(C)Useofahigh-viscositymotoroil
(D)Excessiveenginerpmsatstart-up
6. Whatisthetechniciancheckingintheillustrationshownabove? (A)Valveprotrusion
(B)Valverecession
(C)Coolantnozzlerecession
*(D)Cylinderheadwarpage
7. Duringadieselengineoverhaul,thecylinderlinersarefoundtohaveexcessive
externalcavitationerosion.
TechnicianAsaysthatimproperlytreatedcoolantcouldbethecause.TechnicianBsaysthatanimproperantifreezetowatermix(ratio)couldbethe
cause.
Whoisright?
(A)Aonly *(C)BothAandB
(B)Bonly (D)NeitherAnorB
8. AHEUIenginerunspoorlyandmisres.Whileperforminganenginerunning
injectortest,afaultcodeissetforpoor#3cylindercontribution.TechnicianAsaysthatabadinjectoroncylinder#3couldbethecause.TechnicianBsays
thatabentpushrodoncylinder#3couldbethecause.Whoisright?
(A)Aonly *(C)BothAandB
(B)Bonly (D)NeitherAnorB
S2 SAmplE quESTionS (conTinuEd)
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9. Thecauseofaloggedfaultcodeinanelectronicdieselenginehasjustbeen
repaired.
TechnicianAsaysthatthecodesshouldbeclearedbeforereleasingthevehicle.
TechnicianBsaysthatthecustomerspasswordshouldberesetbefore
releasingthevehicle.
Whoisright?
*(A)Aonly (C)BothAandB
(B)Bonly (D)NeitherAnorB
Question 10 is not like the ones above.
IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcouldNOT causethedescribedsituation.Readtheentirequestioncarefullybefore
choosingyouranswer.
10. ATypeDschoolbushasexcessiveengineoilconsumptionandanoillmon
thebackofthebus.AllofthesecouldbethecauseEXCEPT:
(A)badturbochargerseals.
*(B)acrackedcylinderliner.
(C)wornpistonrings.
(D)wornvalveguideseals.
S2 SAmplE quESTionS (conTinuEd)
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PAGE20 ASE S chool BuSStudyGuidE
TEST SpEcificATionSAnd TASkliSTdrivE TrAin TEST (TEST S3)
Content Questions PercentageArea in Test of Test
A. Clutch Diagnosis and Repair 4 9%
B. Manual Transmission Diagnosis
and Repair 4 9%C. Automatic Transmission Diagnosis 25 55%
and Repair
D. Drive Shaft and Universal Joint Diagnosis
and Repair 5 11%
E. Drive Axle Diagnosis and Repair 7 16%
Total 45 100%
A. Clutch Diagnosis and Repair (4 questions) 1. Diagnoseclutchnoise,binding,slippage,pulsation,grabbing,hardshifting,and
chatterproblems;determineneededrepairs.
2. Inspect,adjust,repair,orreplaceclutchlinkage,cables,levers,brackets,bushings,
pivots,andsprings(includespushandpull-typeassemblies).
3. Inspect,adjust,repair,orreplacehydraulicclutchslaveandmastercylinders,lines,
andhoses;bleedsystem.
4. Inspectrelease(throw-out)bearingclearance,sleeve,bushing,springs,levers,shafts,
andseals;determineneededrepairs. 5. Inspect,orreplaceclutchpressureplateanddiscassembly.
6. Inspectandreplacepilotbearing;checkpilotbearingboreforcondition.
7. Inspectywheelmountingareaoncrankshaft;determineneededrepairs.
8. Inspect,service,orreplaceywheelandstarterringgear.
9. Measureywheelfacerunout;determineneededrepairs.
10. Inspectengineblock,ywheelhousing,andtransmissionhousingmatingsurfaces;
determineneededrepairs.
11. Measureywheelhousingborerunoutandywheelhousingfacerunout;repair
asnecessary.B. Manual Transmission Diagnosis and Repair (4 questions) 1. Diagnosetransmissionnoise,hardshifting,lockup,jumping-out-of-gear,overheat-
ing,andvibrationproblems;determineneededrepairs.
2. Removeandreplacetransmission;inspectandreplacetransmissionmounts,
insulators,andmountingbolts.
3. Inspectforleakage;replacetransmissioncoverplates,gaskets,capbolts,andseals;
inspectsealsurfaces.
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S3 TASkliST (conTinuEd)
4. Checktransmissionuidlevel,type,andcondition;determineneededserviceand
addpropertypeoflubricant.
5. Inspect,adjust,andreplacetransmissionshiftlever,cover,rails,forks,levers,bushings,sleeves,detents,interlocks,springs,andlockbolts.
6. Inspectandreplacespeedometerdrivegearratioadapters,drivengear,cable,and
retainers.
7. Inspect,test,orreplacespeedometerspeedsensor.
8. Inspectandtestbackuplightandwarningdevicecircuitswitches.
C. Automatic Transmission Diagnosis and Repair (25 questions) 1. Diagnosenoise,vibration,andshiftingproblems;determineneededrepairs.
2. Checktransmissionuidlevel;diagnoseuidusageandcondition;determineneededserviceandaddpropertypeoflubricant.
3. Performpressuretests;determineneededrepairs.
4. Performstalltests;determineneededrepairs.
5. Performlock-upconvertersystemtests;determineneededrepairs.
6. Diagnosemechanicalandvacuumcontrolsystems;determineneededrepairs.
7. Inspect,adjust,andreplacemanualvalveshiftlinkageandcables.
8. Inspect,adjust,andreplacecables,linkagesorlinesforthrottlevalve(modulator),
kickdown,andacceleratorpedal.
9. Replaceuidandlter(s).10. Checkdipstickcalibration.
11. Inspect,testand/orreplacegovernor,governorcover,andgasket.
12. Inspectandreplaceexternalsealsandgaskets.
13. Inspect,test,ush,andreplacecooler,lines,ltersandttings.
14. Inspectandreplacespeedometercabledrivegear,drivengear,ratioadapters,
andretainers.
15. Inspect,test,orreplacespeedometerspeedsensor(pulsegenerator).
16. Inspectandtesttransmissiontemperaturegaugecircuitforaccuracy;determine
neededrepairs.17. Inspect,testoperation,adjust,repair,orreplaceelectronicshiftcontrols,indicators,
speedsensors,electronic/transmissioncontrolunits(ECU/TCU),neutral/ingearand
reverseswitches,warningdevices,andwiringharnesses.
18. Inspect,testoperation,repair,orreplaceelectronicshiftselectors(drivercontrols),
switches,displays,indicators,andwiringharnesses.
19. Useappropriatediagnostictoolsandsoftware,procedures,andserviceinformation/
owchartstodiagnoseautomatictransmissionproblems;checkandrecord
diagnosticcodes,clearcodes,interpretdigitalmultimeter(DMM)readings,
determineneededrepairs.20. Diagnoseautomatictransmissionproblemscausedbydatalink/businterfaceswith
relatedelectroniccontrolsystems.
21. Inspect,replace,andaligntransmissionmounts.
22. Removeandreplacetransmission;inspectexplate.
23. Remove,inspect,andreplacetorqueconverter.
24. Inspectengineblock,ywheelhousing,transmissionmatingsurfaces,andengine-
to-transmissionmountingadapters;determineneededrepairs.
25. Diagnosetransmissionbrakeproblems;determineneededrepairs.
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S3 TASkliST (conTinuEd)
D. Drive Shat and Universal Joint Diagnosis and Repair (5 questions) 1. Diagnosedriveshaftanduniversaljointnoiseandvibrationproblems;determine
neededrepairs.
2. Inspect,service,orreplacedriveshaft,slipjoints,yokes,driveanges,universal
joints,vibrationdampers;determinedriveshaftphasing.
3. Inspect,repair,andreplacedriveshaftcentersupportbearingsandmounts.
4. Measureloadedandunloadeddrivelineangles;determineneededrepairs.
5. Inspect,adjust,repair,orreplacedrivelineparkingbrakesystemcomponents.
6. Diagnosedrivelineretarderproblems;determineneededrepairs.
E. Drive Axle Diagnosis and Repair (7 questions)
1. Diagnoserearaxledriveunitnoiseandoverheatingproblems;determineneededrepairs.
2. Checkandrepairuidleaks;inspectandreplacerearaxledriveunitcoverplates,
gaskets,vents,magneticplugs,andpinionseals.
3. Checkrearaxledriveunituidlevelandcondition;determineneededserviceand
addpropertypeoflubricant.
4. Remove,inspect,andreplacedifferentialcarrierassembly.
5. Inspectrearaxlehousingmatingsurfaces;determineneededrepairs.
6. Remove,inspect,andreplaceaxleshafts.
7. Remove,inspect,andreplacerearwheelhubassembly;determineneededrepairs. 8. Diagnosewheelbearingnoisesanddamage;determineneededrepairs.
9. Clean,inspect,lubricate,andreplacewheelbearingconesandraces;cleanand
inspectlockingplatesandnuts,replaceseals,wearrings,andaxleangegasket;
adjustrearwheelbearings.
10. Inspectorreplaceextendedservice(sealed,close-tolerance,andunitized)bearing
assemblies;performinitialinstallationadjustmentprocedures.
11. Check,adjust,andreplacewheelspeedsensor(s).
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SAmplE quESTionSdrivE TrAin (TEST S3)
quESTionS:
1. ATypeAschoolbuswithanoverdrivetransmissionandacomputer-controlled
lock-upconverterhasshiftsthatareearlyandverysoft.Themostlikely
causeis: *(A)Animproperlyadjustedthrottlevalve(TV)cable.
(B)Aslippingconverterclutch.
(C)Aworngovernorgear.
(D)Ashortedconverterclutchsolenoid.
2. TechnicianAsaysthatavibrationinthedrivelinecouldbecausedbyexcessive
universaljointmovement.
TechnicianBsaysthatavibrationinthedrivelinecouldbecausedbyanincorrectuniversaljointoperatingangle.
Whoisright?
(A)Aonly
(B)Bonly
*(C)BothAandB
(D)NeitherAnorB
3. Theautomatictransmissionuidofaschoolbusisdiscoloredandhasanunusualodor.Themostlikelycauseis:
(A)Overrunningtheenginegovernor.
*(B)Overheatingthetransmission.
(C)Adraggingspring(parking)brake.
(D)Impropergearselection.
4. Theuidlevelinaschoolbusautomatictransmissionshouldbechecked
withthe: (A)Engineshutoffatnormaloperatingtemperatures.
(B)EngineshutoffandthetransmissioninNEUTRAL.
(C)EnginerunningandthetransmissioninDRIVE,atnormaloperating
temperatures.
*(D)EnginerunningandthetransmissioninPARK,atnormaloperating
temperatures.
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PAGE24 ASE S chool BuSStudyGuidE
5. Whichoftheseisbeingcheckedinthesetupshownabove?
*(A)Clutchhousingrunout
(B)Clutchdiscrunout
(C)Pilotbearingwear
(D)Clutchdiscsplinewear
6. TherearaxleinaTypeCschoolbusisnoisyondeceleration.Whichofthese
isthemostlikelycause? (A)Awornringandpinion
(B)Aworncarrierbearing
*(C)Abadfrontpinionbearing
(D)Abadrearpinionbearing
7. Acomputer-controlledtransmissionstartsoffinhighgear.Whichofthese
couldbethecause?
*(A)Abadtransmissioncontrolmodule (B)Abadcoolanttemperaturesensor
(C)Alowtransmissionuidlevel
(D)Astuckone-wayclutch
Question 8 is not like the ones above.
IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcould
NOT causethedescribedsituation.Readtheentirequestioncarefullybefore
choosingyouranswer.
8. Aschoolbusdriverreportsthattheclutchslipswhenthebusisaccelerated.All
ofthesecouldbethecauseEXCEPT:
(A)Noclutchpedalfreeplay. (C)Wornpressureplatesprings.
(B)Awornclutchdisc. *(D)Excessiveywheelrunout.
S3 SAmplE quESTionS (conTinuEd)
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Content Questions PercentageArea in Test of Test
A. Air Brakes Diagnosis and Repair 28 56%
1. Air Supply and Service Systems (15)
2. Mechanical/Foundation (9)3. Parking Brakes (4)
B. Hydraulic Brakes Diagnosis and Repair 18 36%
1. Hydraulic System (9)2. Mechanical System (6)
3. Power Assist Units and Misc. (3)
C. Wheel Bearings Diagnosis and Repair 4 8%
Total 50 100%
TEST SpEcificATionSAnd TASkliSTBrAkES (TEST S4)
A. Air Brakes Diagnosis and Repair (28 questions)
1. Air Supply and Service Systems (15 questions) 1. Diagnosepoorstopping,airleaks,pulling,grabbing,ordraggingcomplaintscaused
bysupplyandservicesystemproblems;determineneededrepairs.
2. Checkairsystembuild-upandrecoverytime;determineneededrepairs.
3. Drainairreservoirtanks;checkforoil,water,andforeignmaterial;determineneeded
repairs. 4. Inspect,adjust,align,orreplaceaircompressordrivebelts,pulleys,tensioners,drive
gears,andcouplings.
5. Inspect,repair,orreplaceaircompressor,aircleaner,oilandwaterlinesandttings.
6. Inspect,test,adjust,orreplacesystempressurecontrols(governor/reliefvalve),
unloaderassemblyvalves,pressureprotectionvalves,andlters.
7. Inspect,repair,orreplaceairsystemlines,hoses,ttings,andcouplings.
8. Inspect,test,clean,orreplaceairtankrelief(pop-off)valves,one-waycheckvalves,
draincocks,automaticdrain(spitter)valves,heaters,wiring,andconnectors.
9. Inspect,clean,repair,orreplaceairdriersystems,lters,valves,heaters,wiring,
andconnectors.
10. Inspect,test,adjust,repair,orreplacebrakeapplication(foot/treadle)valve,ttings,
andmounts;checkandadjustbrakepedalfreeplay.
11. Inspect,test,clean,orreplacetwo-way(double)checkvalvesandanti-compounding
valves.
12. Inspect,test,repair,orreplacestopandparkingbrakelightcircuitswitches,wiring,
andconnectors.
13. Inspect,test,repair,orreplacebrakerelayvalve,quick-releasevalves,andlimiting
quick-releasevalves.
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PAGE26 ASE S chool BuSStudyGuidE
S4 TASkliST (conTinuEd)
14. Inspect,test,andreplaceinversionandemergency(spring)brakecontrolvalve(s).
15. Inspect,test,repair,orreplacelowpressurewarningdevices.
16. Inspect,test,andreplaceairpressuregauges,lines,andttings.17. Performantilockbrakesystem(ABS)warninglampstart-uptest;determineneeded
repairs;diagnosehardfaultcodes/diagnostictroublecodes(DTCs)usingscantool,
PCcomputer,orLEDs;determineneededrepairs.
18. Diagnosepoorstoppingandlockupproblemsonantilockbrakesystems(ABS);
determineneededrepairs.
19. Test,adjust,orreplaceantilockbrakesystem(ABS)wheelspeedsensorsandtone/
exciterrings.
20. Testandreplaceantilockbrakesystem(ABS)electroniccontrolunits(ECU)and
modulatorvalves;test,repair,andreplacewiringandconnectors.
2. Mechanical/Foundation (9 questions) 1. Diagnosepoorstopping,brakenoise,pulling,grabbing,ordraggingproblemscaused
byfoundationbrake,slackadjuster,andbrakechamberproblems;determineneeded
repairs.
2. Inspect,test,adjust,repair,orreplaceservicebrakechambers,diaphragm,clamp,
spring,pushrod,clevis/pins,andmountingbrackets.
3. Inspect,test,adjust,repair,orreplacemanualandautomaticslackadjusters.
4. InspectorreplaceS-camsbrakerollers,camshafts,bushings,seals,spacers,retainers,brakespiders,shields,anchorsprings,andsprings.
5. Inspect,clean,rebuildorreplace,andadjustairdiscbrakecaliperassemblies.
6. Inspectandreplacebrakeshoes,orpads.
7. Inspect,resurface,orreplacebrakedrumsorrotors.
3. Parking Brakes (4 questions) 1. Inspectandtestparking(spring)brakechamberoperation;replaceparking(spring)
brakechamber;disposeofremovedchambersinaccordancewithlocalregulations.
2. Inspect,test,orreplaceparking(spring)brakevalves,lines,hoses,andttings.
3. Manuallyreleaseand(cage)reset(uncage)parking(spring)brakes. 4. Inspect,test,orreplaceparkingbrakeinterlockvalve,module,wiring,and
connectors.
B. Hydraulic Brakes Diagnosis and Repair (18 questions)
1. Hydraulic System (9 questions) 1. Diagnosepoorstopping,pulling,dragging,orbrakefeelcomplaintscausedby
hydraulicsystemproblems;determineneededrepairs.
2. Inspecthydraulicsystemforleaks.
3. Checkandadjustbrakepedalfreeplay. 4. Inspect,test,orreplacemastercylinder.
5. Inspect,test,orreplacebrakelines,exiblehoses,andttings.
6. Inspect,test,andreplacemetering(hold-off),proportioning,andcombinationvalves.
7. Inspect,test,orreplacebrakepressuredifferentialvalveandwarninglightcircuit
switch,bulbs,wiring,andconnectors.
8. Inspect,andreplacewheelcylinders.
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S4 TASkliST (conTinuEd)
9. Remove,inspect,clean,andreplacediscbrakecaliperassemblies.
10. Inspect/testbrakeuid;bleedand/orushhydraulicsystem.
11. Performantilockbrakesystem(ABS)warninglampstart-uptest;determineneededrepairs;diagnosehardfaultcodes/diagnostictroublecodes(DTCs)usingscantool,
PCcomputer,orLEDs;determineneededrepairs.
12. Diagnosepoorstoppingandlockupproblemsonantilockbrakesystems(ABS);
determineneededrepairs.
13. Test,adjust,orreplaceantilockbrakesystem(ABS)wheelspeedsensorsandtone/
exciterrings.
14. Testandreplaceantilockbrakesystem(ABS),electroniccontrolunits(ECU)and
modulatorvalves;test,repair,andreplacewiringandconnectors.
15. Inspect,test,andreplaceparkingbakeinterlockvalves,modules,wiring,andconnectors.
2. Mechanical System (6 questions) 1. Diagnosepoorstopping,noise,pulling,grabbing,dragging,orpedalpulsation
complaintscausedbydrumanddiscbrakemechanicalassemblyproblems;determine
neededrepairs.
2. Inspect,resurface,orreplacebrakedrumsorrotors.
3. Inspect,adjust,orreplacedrumbrakeshoes,mountinghardware,adjustermecha-
nisms,andbackingplates. 4. Inspect,orreplacediscbrakepadsandmountinghardware;inspectorreplaceanchor
plateandmountinghardware.
5. Inspect,adjust,andrepairorreplacein-wheelmechanicalandhydraulicparking
brakesystems.
6. Inspect,adjust,orreplacedrivelineparkingbrakedrums,rotors,bands,shoes,mount-
inghardwareandadjusters.
7. Inspect,adjust,orreplacedrivelineparkingbrakeapplicationsystempedal,actuators,
cables,linkage,levers,pivots,springs,bearings,andseals.
3. Power Assist Units and Miscellaneous (3 questions) 1. Diagnosepoorstoppingcomplaintscausedbypowerbrakeboosterproblems;
determineneededrepairs.
2. Inspect,test,repair,orreplacepowerbrakeboosterhosesandcontrolvalves.
3. Test,adjust,andreplacebrakestoplightswitch,bulbs,wiring,connectors,and
warningdevices.
C. Wheel Bearings Diagnosis and Repair (4 questions) 1. Removeandreplaceaxlehubandwheelassembly.
2. Clean,inspect,lubricate,orreplacewheelbearingassemblies;replacesealsand
wearrings(ifapplicable).
3. Adjustaxlewheelbearingsinaccordancewithmanufacturersproceduresand
specications(includesstandardandunitized).
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PAGE28 ASE S chool BuSStudyGuidE
SAmplE quESTionSBrAkES (TEST S4)
quESTionS:
1. Theparkingbrakesfailtoapplyonaschoolbuswithairbrakes.
TechnicianAsaysthatlowairpressureinthespringbrakechambercouldbe
thecause.TechnicianBsaysthatarupturedspringbrakediaphragmcouldbethecause.
Whoisright?
(A)Aonly (C)BothAandB
(B)Bonly *(D)NeitherAnorB
2. Aschoolbushasanunevenbrakingproblem.Whichofthesecouldbe
thecause?
(A)Abindingtreadle(foot)valve *(C)Abadbrakedrum (B)Lowbrakelineairpressure (D)Abadgovernor
3. Theslackadjustershownisbeingadjusted.
TechnicianAsaysthattravelXshouldbeasshortaspossiblewithoutcausing
thebrakestodrag.
TechnicianBsaysthatangleYshouldbelessthan90whenthebrakes
areapplied.
Whoisright? *(A)Aonly
(B)Bonly
(C)BothAandB
(D)NeitherAnorB
Y
X
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S4 SAmplE quESTionS (conTinuEd)
4. Allthebrakesdragonaschoolbuswithhydraulicbrakes.Thisismostlikely
causedby:
(A)Airinthehydraulicsystem.
(B)Excessivevacuumsupplytothepowerbrakebooster.
(C)Aleakingsecondarycupinthemastercylinder.
*(D)Nobrakepedalfreetravel.
5. TechnicianAsaysthatthelowairpressurewarningsystemmustprovide
asignalthatthedrivercanhear.
TechnicianBsaysthatthelowairpressurewarningsystemmustprovide
asignalthatthedrivercansee.
Whoisright?
(A)Aonly *(C)BothAandB
(B)Bonly (D)NeitherAnorB
6. Themostlikelycausefornoairpressureinthesecondaryairreservoirtankis:
(A)Animproperlyadjustedairgovernor.
*(B)Apluggedone-waycheckvalve.
(C)Aweakpressurereliefvalve.
(D)Arestrictedcompressormaindischargeline.
Questions 7 and 8 are not like the ones above.
EachofthesehasthewordEXCEPT.Foreachquestion,lookforthechoice
thatcouldNOTcausethedescribedsituation.Readtheentirequestion
carefullybeforechoosingyouranswer
7. Thedriverofaschoolbuswithairbrakessaysthatithaspoorstoppingpower.AllofthesecouldbethecauseEXCEPT:
*(A)Thequick-releasevalveexhaustportisplugged.
(B)Theairpressureistoolow.
(C)Theapplicationlineisrestricted.
(D)Thebrakesareadjustedwrong.
8. Thelowairpressureindicatorstaysonwhentheairpressuregaugeshows
100psi.AllofthesecouldbethecauseEXCEPT: (A)Burnedcontactpointsinthepressureswitch.
*(B)Lowbatteryvoltageatthepressureswitch.
(C)Apluggedairinlettothepressureswitch.
(D)Ablowndiaphragminthepressureswitch.
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PAGE30 ASE S chool BuSStudyGuidE
Content Questions PercentageArea in Test of Test
A. Steering System Diagnosis and Repair 18 36%
B. Suspension Systems Diagnosis and Repair 18 36%
1. Independent Front Suspensions (5)2. Straight/I-Beam Axle Diagnosis
and Repair (6)
3. Rear Suspensions (7)
C. Wheel Alignment Diagnosis,
Adjustment, and Repair 8 16%
D. Wheels and Tires Diagnosis and Repair 6 12%
Total 50 100%
TEST SpEcificATionSAnd TASkliSTSuSpEnSionAnd STEEring (TEST S5)
A. Steering System Diagnosis and Repair (18 questions)1. Diagnosesteeringcolumn(tiltandxed)shaftnoise,looseness,andbinding
problems;determineneededrepairs.
2. InspectandreplacesteeringshaftU-joint(s),slipjoints,bearings,bushings,andseals;
phaseshaftU-joints.
3. Diagnosepowersteeringsystemnoises,steeringbinding,uneventurningeffort,
looseness,hardsteering,overheating,uidleakage,anduidaerationproblems;
determineneededrepairs.
4. Inspectpowersteeringuidlevelandcondition;determineneededserviceanduid
type.
5. Purgeairfromthepowersteeringsystem.
6. Performpowersteeringsystempressureandowtests;determineneededrepairs.
7. Inspect,service,orreplacepowersteeringreservoirincludinghoses,lter,seals,
andgaskets.
8. Inspect,adjust,align,orreplacepowersteeringpumpbelt(s),pulley(s),andtension-
ers.
9. Inspectpowersteeringpumpdrivegearandcoupling;replaceasrequired.
10. Inspect,adjust,repair,orreplacepowersteeringpump,mountings,andbrackets.
11. Inspect,test,orreplacepowersteeringpumpinternal/externalpressureregulator
valve(s).
12. Inspectandreplacepowersteeringsystemlines,hoses,cooler,andttings.
13. Inspect,adjust,orreplaceintegral-typepowersteeringgear.
14. Inspectandreplacepitmanarm.
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S5 TASkliST (conTinuEd)
15. Inspect,adjust,orreplacedraglink/centerlink,tierods,andends;positionadjusting
sleeves,clamps,andretainers.
16. Inspectand/orreplaceidlerarm(s).17. InspectandreplacesteeringandAckerman(tierod)arms.
18. Checkandadjuststeeringlinkageorwheelstops(axlestops).
19. Checkandadjuststeeringgearpoppets/reliefvalves.
B. Suspension Systems Diagnosis and Repair (18 questions)
1. Independent Front Suspensions (5 questions)1. Diagnosefrontsuspensionsystemnoises,looseness,bodysway,androughride;
determineneededrepairs.
2. Inspectandreplaceupperandlowercontrolarms,strutrods/radiusarms,bushings,shafts,andrebound/jouncebumpersonshortandlongarm(SLA)suspension
systems.
3. Inspectandreplaceupperandlowerballjointsand/orkingpins.
4. Inspectandreplacesteeringknuckle/spindleassemblies.
5. Measureandcorrectrideheightasrequired.
6. Inspectandreplacefrontsuspensionsystemcoilspringsandspringinsulators
(silencers);measurerideheight.
7. Inspectandreplacestabilizerbar(swaybar)bushings,brackets,andlinks.
8. Inspectandreplaceshockabsorbers,bushings,brackets,andmounts.
2. Straight/I-Beam Axle Diagnosis and Repair (6 questions)1. Diagnosefrontsuspensionsystemnoises,looseness,bodysway,androughride;
determineneededrepairs.
2. Inspectandreplacefrontaxle,U-bolts,andnuts.
3. Inspect,serviceorreplacekingpin,steeringknucklebushings,locks,bearings,shims,
seals,andcovers.
4. Inspectandreplaceshockabsorbers,bushings,brackets,andmounts.
5. Inspect,repair,orreplaceleafsprings,shims/wedges,centerbolts,clips,fasteners,bushings,shackles,pins,insulators,brackets,andmounts.
6. Measurevehiclerideheight;determineneededadjustmentsorrepairs.
3. Rear Suspensions (7 questions)1. Diagnosesuspensionsystemnoises,looseness,roughride,andbodyswayproblems;
determineneededrepairs.
2. Inspectandreplacerearaxlehousing,U-bolts,andnuts.
3. Inspectandreplaceshockabsorbers,bushings,brackets,andmounts.
4. Measurevehiclerideheight;determineneededadjustmentsorrepairs.
5. Inspectandreplaceleafsprings,centerbolts,clips,fasteners,bushings,shackles,pins,insulators,brackets,shims/wedges,andmounts(padsandsaddles).
6. Inspectandreplacetorquearms(rods),pins,bolts,bushings,andmounts.
7. Inspect,test,adjust,repair,orreplaceairsuspensionpressureregulator,pressure
protectionvalve(s),heightcontrolvalve(s),links,lines,hoses,andttings.
8. Inspect,test,repair,orreplaceairbags,springs,shims,mountingplates,suspension
arms,bushings,pinsandbolts.
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PAGE32 ASE S chool BuSStudyGuidE
S5 TASkliST (conTinuEd)
C. Wheel Alignment Diagnosis, Adjustment, and Repair (8 questions)1. Diagnosevehiclewandering,pulling,shimmy,darting,andsteeringeffortproblems;
determineneededadjustmentsorrepairs.
2. Checkandadjustcamberandcaster;determineneededrepairs.
3. CheckSAI(steeringaxisinclination)/KPI(kingpininclination)andincludedangle;
determineneededrepairs.
4. Checkandadjusttoe.
5. Diagnosetoe-out-on-turn(Ackermanangle)problems;determineneededrepairs.
6. Checkrearaxlealignment(thrustline/centerline)andtracking;adjustordetermine
neededrepairs.
7. Checkandadjuststeeringand/ordriveaxlewheelbearings.
D. Wheels and Tires Diagnosis and Repair (6 questions)1. Diagnosetirewearpatterns;determineneededrepairs.
2. Inspect,repair,orreplacetires;checkairpressure;valvestems,andcaps.
3. Diagnosewheel/tirevibration,wheelhop,andshimmyproblems;determineneeded
repairs.
4. Inspectandreplacewheels/rims,wheelspacers,clamps,studs,andnuts.
5. Measurewheelandtireradialandlateralrunout;determineneededrepairs.
6. Balancewheelandtireassembly.
7. Measuretirediameterand/orcircumference;matchtiresandrims.
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SAmplE quESTionSSuSpEnSionAnd STEEring (TEST S5)
quESTionS:
1. Whichofthesecouldcausethefronttiresofaschoolbustoshowafeathered
edgewearpattern?
*(A)Awrongtoesetting (C)Awrongcastersetting (B)Awrongcambersetting (D)Wrongtirepressures
2. Excessivesteeringwheelfreeplaymaybeanindicationof:
(A)Aloosepowersteeringpumpdrivebelt.
(B)Improperlyadjustedaxlestops.
(C)Contaminatedpowersteeringuid.
*(D)Loosesteeringsector-to-framemountingbolts.
3. Aschoolbushasahistoryofspringsbreakingatthecenterboltholes.
TechnicianAsaysthatlooseu-boltscouldbethecause.
TechnicianBsaysthatloosespringshacklescouldbethecause.
Whoisright?
*(A)Aonly (C)BothAandB
(B)Bonly (D)NeitherAnorB
4. Aschoolbushasagreaterturningradiusinonedirectionthanintheother.
Thiscouldbecausedby:
(A)Over-tightenedwheelbearingadjustment.
(B)Airinthehydraulicsystem.
(C)Incorrectpowersteeringuid.
*(D)Incorrectaxlestopadjustment.
5. Atechnicianndslowpumppressureduringapowersteeringpressuretest.Whichofthesecouldbethecause?
(A)Excessivehoseback-pressure
(B)Awornsteeringgear
(C)Ahighuidlevel
*(D)Awornpowersteeringpump
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PAGE34 ASE S chool BuSStudyGuidE
6. Aschoolbusdriverreportsthatthefrontendstartstoshimmyat40mph
(64kph)andstopsat45mph(72kph).Thiscouldbecausedbya:
*(A)missingwheelweight.
(B)wornswaybarbushing.
(C)brokenspringleaf.
(D)drykingpinbushing.
7. Aschoolbusleanstooneside.Themostlikelycauseis:
(A)AloosespringU-bolt.
*(B)Abrokenleafspring.
(C)Badshockabsorbers
(D)Loosespringshackles.
Question 8 is not like the ones above.
IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcould
NOT causethedescribedsituation.Readthequestioncarefullybefore
choosingyouranswer.
8. AllofthesemustbecheckedbeforealigningthefrontwheelsonaschoolbusEXCEPT:
(A)tirepressure.
(B)trimheight.
(C)wheelbearingadjustment.
*(D)tirebalance.
S5 SAmplE quESTionS (conTinuEd)
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TEST SpEcificATionSAnd TASkliSTSElEcTricAl/ElEcTronic SySTEmS (TEST S6)
Content Questions PercentageArea in Test of Test
A. General Electrical Diagnosis 4 9%
B. Battery Diagnosis and Service 3 6%
C. Starting System Diagnosis and Repair 7 16%
D. Charging System Diagnosis and Repair 7 16%
E. Lighting Systems Diagnosis and Repair 15 33%
1. Headlights, Daytime Running Lights,
Fog Lights, Parking, Clearance, Tail
Lights, Dome, Stepwell, Strobe, and
Dash Lights (7)
2. Stoplights, Turn Signals, Hazard Lights,
Back-up Lights/Alarms, and 4-Lampand 8-Lamp Warning Systems (8)
F. Gauges and Instrument Warning DeviceDiagnosis and Repair 4 9%
G. Miscellaneous 5 11%
Total 45 100%
A. General Electrical System Diagnosis (4 questions) 1. Checkcontinuityinelectrical/electroniccircuitsusingappropriatetestequipment.
2. Checkappliedvoltages,circuitvoltages,andvoltagedropsinelectrical/electronic
circuitsusingadigitalmultimeter(DMM).
3. Checkcurrentowinelectrical/electroniccircuitsandcomponentsusinganammeter.
4. Checkresistanceinelectrical/electroniccircuitsandcomponentsusinganohmmeter.
5. Locateopen,shorted,andgroundedcircuitsinelectrical/electronicsystems.
6. Diagnosekey-offbatterydrainproblems.
7. Inspect,test,andreplacefusiblelinks,circuitbreakers,andfuses. 8. Inspect,test,andreplacespikesuppressioncapacitors,resistorsanddiodes.
B. Battery Diagnosis and Service (3 questions) 1. Performbatterycapacity(load,highratedischarge)test;determineneededservice.
2. Determinebatterystate-of-chargebymeasuringterminalpostvoltageusingadigital
multimeter(DMM).
3. Inspect,clean,service,orreplacebatteries.
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S6 TASkliST (conTinuEd)
4. Inspect,clean,repair,andreplacebatteryboxes,mounts,andholddowns.
5. Chargebatteryusingsloworfastchargemethodasappropriate.
6. Inspect,clean,repair,andreplacebatterycablesandconnectors. 7. Jumpstartavehicleusingjumpercablesandaboosterbatteryorauxiliarypower
supply.
C. Starting System Diagnosis and Repair (7 questions) 1. Performstartercurrentdrawtest;determineneededrepairs.
2. Performstartercircuitvoltagedroptests;determineneededrepairs.
3. Inspect,test,andreplacecomponentsandwiringinthestartercontrol/interrupt
circuit. 4. Inspect,remove,andreplacestarter.
5. Inspect,test,andreplacestarterrelaysandsolenoids/switches.
D. Charging System Diagnosis and Repair (7 questions) 1. Diagnosedash-mountedchargemetersand/orindicatorlightsthatshowanocharge,
lowcharge,oroverchargecondition;determineneededrepair.
2. Diagnosethecauseofanocharge,lowcharge,oroverchargecondition;determine
neededrepair.
3. Inspect,adjust,andreplacealternatordrivebelts,pulleys,fans,andmountingbrackets.
4. Performchargingsystemoutputtest;determineneededrepairs.
5. Performchargingcircuitvoltagedroptests;determineneededrepairs.
6. Inspect,removeandreplacealternator.
7. Inspect,repair,orreplaceconnectorsandwiringinthechargingcircuit.
E. Lighting Systems Diagnosis and Repair (15 questions)
1. Headlights, Daytime Running Lights, Fog Lights, Parking, Clearance, Tail Lights,Dome, Stepwell, Strobe, and Dash Lights (7 questions) 1. Diagnosethecauseofbrighter-than-normal,intermittent,dim,ornoheadlight
operation.
2. Inspect,test,aim,andreplaceheadlights.
3. Inspect,test,repair,orreplaceheadlightanddimmerswitches,relays,control
modules,solenoids,wiring,connectors,andsockets.
4. Inspect,test,repair,orreplaceswitches,relays,solenoids,bulbs,LEDs,sockets,con-
nectors,andwiringoffoglight,parking,clearance,stepwell,strobelight,
andtaillightcircuits. 5. Inspect,test,repair,orreplacedashlightcircuitswitches,bulbs,LEDs,sockets,
connectors,wiring,printedcircuits,andinstrumentpanelwarninglights.
6. Inspect,test,repair,orreplacedomelightcircuitswitches,relays,bulbs,LEDs,
sockets,connectors,andwiring.
2. Stoplights, Turn Signals, Hazard Lights, Back-up Lights/Alarms, and 4-Lamp and
8-Lamp Warning Systems (8 questions) 1. Inspect,test,adjust,repair,orreplacestoplightcircuitswitches,relays,bulbs,LEDs,
sockets,connectors,andwiring.
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S6 TASkliST (conTinuEd)
2. Diagnosethecauseofnoturnsignalandhazardasherlightsandindicators,orlights
withnoashononeorbothsides.
3. Inspect,test,repair,orreplaceturnsignalandhazardcircuitasher,switches,bulbs,LEDs,sockets,connectors,andwiring.
4. Inspect,test,adjust,repair,orreplaceback-uplights/alarmsandwarningdevice
circuitswitches,relays,solenoids,bulbs,LEDs,sockets,horns,buzzers,connectors,
andwiring.
5. Inspect,test,repairorreplace4-lampand8-lampwarningsystems(motor-driven,
sequentialandnon-sequential),stoparmlights,switches,relays,diodes,control/
asherunits,andactuators.
6. Inspect,test,repairorreplace4-lampand8-lampwarningsystems(electronic,
sequentialandnon-sequential),stoparmlights,switches,relays,diodes,control/asherunits,andactuators.
7. Inspect,testandrepairoverridecircuitsfor4-lampand8-lampwarninglightsystems.
8. Inspect,test,adjustandrepairelectronically-controlledstoparmsandcrossinggates.
F. Gauges and Instrument Warning Devices Diagnosis and Repair (4 questions) 1. Diagnoseintermittent,high,low,ornogaugereadings;determineneededrepairs.
(Doesnotincludechargeindicators.)
2. Inspect,test,adjust,repair,orreplacegaugecircuitsendingunits,gauges,connectors,andwiring.
3. Inspect,test,repair,orreplaceinstrumentwarninglightcircuitsendingunits,bulbs,
sockets,connectors,wiring,diodes,andprintedcircuits.
4. Inspect,test,repair,orreplaceaudiblealarmcircuitsendingunits,buzzers,switches,
relays,connectors,wiring,andprintedcircuits.
5. Inspect,test,replaceandcalibrateelectronicspeedometer,odometer,tachometer
systems,andhourmeters.
G. Miscellaneous (5 questions) 1. Diagnose,inspect,test,repair,orreplacehorncircuitrelays,horns,switches,
connectors,andwiring.
2. Diagnose,inspect,test,repair,orreplacewipermotor,intermittent(delay)module,
transmissionlinkage,resistors,parkswitch,relays,switches,connectors,andwiring.
3. Inspect,test,repair,orreplacewindshieldwashermotor,pump/relayassembly,
switches,connectors,andwiring.
4. Inspect,test,repair,orreplacemirrorheatercircuitgrids,relays,timercircuits,
switches,connectors,andwiring.
5. Inspect,test,repairorreplacemotorizedsideviewmirrorrelays,motors,switches,connectors,andwiring.
6. Inspect,test,repair,orreplaceheaterelectricalcomponentsincludingblowermotors,
boosterpumps,resistors,relays,switches,connectors,andwiring.
7. Inspect,test,repair,orreplaceaccessorypoweroutlets,integralfuses,connectors,
andwiring.
8. Diagnose,inspect,test,adjust,repairorreplacevandallock/starterinterlocksystem
switches,actuators,relays,alarms,connectors,andwiring.
9. Inspect,test,adjustandrepairelectrically-controlleddooropeningdevices.
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PAGE38 ASE S chool BuSStudyGuidE
1. Ifachargingsystemcheckshowsafullychargedbatteryandahighcharging
rate,thetechnicianshouldtestthe:
(A)Alternatordiodes. (B)Statorwindings.
*(C)Voltageregulator.
(D)Fieldcurrentdraw.
2. Bothheadlightsonaschoolbusaredimonhighbeam,andnormal
onlowbeam.
TechnicianAsaysthatapoorheadlightgroundcouldbethecause.
TechnicianBsaysthatashortedheadlightswitchcouldbethecause.
Whoisright?
(A)Aonly (C)BothAandB
(B)Bonly *(D)NeitherAnorB
3. Thehornsinthecircuitshownaboveonlyblowwhenajumperwireis
connectedbetweenterminals#1and#2ofthehornrelay.
TechnicianAsaysthatabadhornrelaycouldbethecause.
TechnicianBsaysthatagroundinthecircuitbetweenthehornrelayandthe
hornswitchcouldbethecause.
Whoisright?
*(A)Aonly (C)BothAandB
(B)Bonly (D)NeitherAnorB
SAmplE quESTionSElEcTricAl/ElEcTronic SySTEmS (TEST S6)
quESTionS:
BATTERY
HORNS
2 3
1
HORN RELAY
HORN SWITCH
20 AMPS
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S6 SAmplE quESTionS (conTinuEd)
4. Whenthedoorisopenedandtheamberlightscancel,theredlightsdonot
illuminateonaschoolbuswithanelectronic8-lampwarningsystem.
TechnicianAsaysthatabadrelaycouldbethecause.
TechnicianBsaysthatabadmasterswitchcouldbethecause.
Whoisright?
*(A)Aonly (C)BothAandB
(B)Bonly (D)NeitherAnorB
5. Thewindshieldwipersonaschoolbuswillnotpark.Whichoftheseisthe
mostlikelycause?
(A)Thewormgearisout-of-adjustment
*(B)Abadparkingswitchassembly
(C)Abindingwipertransmission
(D)Apoorgroundatthewipermotor
6. Whichofthesecouldcausethedriversheaterblowermotortooperateatlow
speedonly?
(A)Anopenground (C)Abindingblowercage
*(B)Abadheaterswitch (D)Awiringshorttotheheater
Questions 7 and 8 are not like the ones above.
EachofthesehasthewordEXCEPT.Foreachquestion,lookforthe
choicethatcouldNOT causethedescribedsituation.Readtheentirequestion
carefullybeforechoosingyouranswer.
7. AllofthesecouldcausehighstartercurrentdrawEXCEPT:
(A)Wornstarterbushings *(B)Abadstarterrelay
(C)Groundedeldcoils
(D)Agroundedarmature
8. Schoolbuseswhicharenotoperatedduringthesummerformorethan30days
shouldhaveallofthesedonetothebatteriesEXCEPT:
(A)Removedandstored
(B)Periodicallytestedandcharged (C)Disconnectthenegativecable
*(D)Replacetheelectrolyte
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PAGE40 ASE S chool BuSStudyGuidE
Content Questions PercentageArea in Test of Test
A. A/C System Diagnosis and Repair 16 36%
B. A/C System Component Diagnosis and
Repair 14 31%1. Compressor and Clutch (6)
2. Evaporator, Condenser, and Related
Components (8)
C. Operating Systems and Related ControlsDiagnosis and Repair 12 27%
D. Refrigerant Recovery, Recycling,
and Handling 3 6%
Total 45 100%
TEST SpEcificATionSAnd TASkliSTAir condiTioning SySTEmSAnd conTrolS (TEST S7)
A. A/C System Diagnosis and Repair (16 questions) 1. DiagnosethecauseofunusualoperatingnoisesoftheA/Csystem;determineneeded
repairs.
2. IdentifysystemtypeandconductperformancetestontheA/Csystem;determine
neededrepairs.
3. DiagnoseA/Csystemproblemsindicatedbyrefrigerantowpastthesightglass(forsystemsusingasightglass);determineneededrepairs.
4. DiagnoseA/Csystemproblemsindicatedbypressuregaugereadings;determine
neededrepairs.
5. DiagnoseA/Csystemproblemsindicatedbyvisualandtouchprocedures;determine
neededrepairs.
6. LeaktestA/Csystem;determineneededrepairs.
7. Determinetypeofrefrigerant;performA/Csystemrecoveryprocedure.
8. EvacuateA/Csystem.
9. InternallycleanA/Csystemcomponentsandhoses.10. ChargeA/Csystemwithrefrigerant(liquidorvapor).
B. A/C System Component Diagnosis and Repair (14 questions)
1. Compressor and Clutch (6 questions) 1. DiagnoseA/Csystemproblemsthatcausethepressureprotectiondevicestointerrupt
systemoperation;determineneededrepairs.
2. TestandreplaceA/Csystempressureprotectiondevices.
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3. Inspect,adjust,andreplaceA/Ccompressordrivebeltsandpulleys;checkoperation
ofautomatictensioner(s);checkpulleyalignment.
4. Inspect,test,service,andreplaceA/Ccompressorclutchcomponentsorassembly. 5. Determineoiltype;inspectandcorrectoillevelinA/Ccompressor.
6. Inspect,test,andreplaceA/Ccompressor.
7. Inspect,repairorreplaceA/Ccompressormountings.
2. Evaporator, Condenser, and Related Components (8 questions) 1. Inspect,repairorreplaceA/Csystemmufers,hoses,lines,in-linelters,ttings,
andseals.
2. InspectA/Ccondenserforairowrestrictions;cleanandstraightenns.
3. Inspect,repairorreplaceA/Csystemcondensercoil,condenserchassis,and
mountings.
4. Removeandreplacereceiver/drier.
5. Removeandreplaceaccumulator/drier.
6. Inspect,test,andreplaceexpansionvalve.
7. Inspect,test,andreplaceoricetube.
8. Inspect,clean,orreplaceevaporatorandinletairlter.
9. Inspect,clean,andrepairevaporatorhousingandwaterdrain.
10. Identify,inspect,andreplaceA/Csystemserviceports(gaugeconnections).
C. Operating Systems and Related Controls Diagnosis and Repair (12 questions) 1. Diagnosefailuresinthecontrolsystemofheating,ventilating,andA/Csystems;
determineneededrepairs.
2. Inspect,test,repair,orreplaceevaporatorblowermotors,resistors,switches,
relay/modules,wiring,andprotectiondevices;checkoperationofelectrically-
operatedmode/blenddoors.
3. Inspect,test,repair,orreplaceA/Ccompressorclutchcoil,relay/modules,wiring,
sensors,switches,diodesandprotectiondevices.
4. DiagnoseA/Cproblemsrelatedtoengineidlespeedcontrolsystems.
5. Inspect,test,repair,orreplacecondenserfanmotors,relays/modules,switches,sensors,wiring,andprotectiondevices.
6. Inspect,test,adjust,andrepairorreplaceevaporatortemperatureswitches,sensors,
andwiring.
7. Inspect,test,adjust,andrepairorreplaceelectricalchargingsystemcomponents.
8. Inspect,test,adjust,repair,orreplaceheating,ventilating,andA/Cducts,doors,
hoses,andoutlets.
9. Inspect,test,andreplacemechanicalheater-controlvalvesandmanualshut-off
valves.
D. Rerigerant Recovery, Recycling, and Handling (3 questions)Tasks1through5shouldbeaccomplishedinaccordancewithcurrentEPA
regulationsandSAEstandardsformotorvehiclerefrigerants.
1. Maintainandverifycorrectoperationofcertiedequipment.
2. IdentifyandrecoverA/Csystemrefrigerantandcontainers.
3. Recyclelabelandstore,properlydisposeofrefrigerant,testfornon-condensables
andcontamination.
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PAGE42 ASE S chool BuSStudyGuidE
quESTionS:
1. TheA/CsystemonaTypeAschoolbusisblowingcool,butnotcold,air
fromthedashducts.Thesystemhasthecorrectchargeandthepressuregauge
readingsarenormal.Whichoftheseisthemostlikelycause?
(A)Theairrecirculationdoorisstuckclosed.
(B)Theheatervalveisstuckclosed.
(C)Thesourceofvacuumhasbeenlost.
*(D)Theblenddoorisoutofadjustment.
2. AhighpitchednoisecomesfromoneoftheevaporatorswhiletheA/Csystem
isrunning.
TechnicianAsaysthatthenoisecouldbecausedbytheA/Csystemequalizing.
TechnicianBsaysthatthenoisecouldbecausedbyapartiallyrestricted
expansionvalve.
Whoisright?
(A)Aonly (C)BothAandB
*(B)Bonly (D)NeitherAnorB
3. AnA/Csystemhasalowdischargepressure.Whichofthesecouldbethe
cause?
*(A)Abadinternalcompressorseal
(B)Arestrictedrefrigerantowinthecondenser
(C)Arestrictedairowoverthecondenser
(D)Acompressorclutchthatwillnotdisengage
4. Thehigh-sidepressurereaches300psiwithin15secondswhenthecompressor
onanA/Csystemisengaged.
TechnicianAsaysthatabadcompressorcouldbethecause.
TechnicianBsaysthatarestrictionintheevaporatorcouldbethecause.
Whoisright?
(A)Aonly (C)NothAandB
(B)Aonly *(D)NeitherAnorB
SAmplE quESTionSAir condiTioning SySTEmSAnd conTrolS (TEST S7)
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S7 SAmplE quESTionS (conTinuEd)
5. WhichofthesecomponentsshouldbereplacedwhenanA/Csystemisfound
tohaveexcessivemoisture?
(A)Compressor
(B)Thermostat
*(C)Receiver/drier
(D)Evaporator
6. Theaccumulator/drieriswarmonanA/Csystemthathasbeenoperating
(compressorengaged)for20minutes.Whichofthesecouldbethecause?
(A)Toolittleclutchairgap
*(B)Arefrigerantundercharge
(C)Arefrigerantovercharge
(D)Anopeninthepressureswitch
7. AnA/Csystemwithanewcompressorandreceiver/drierisnotcooling
properlyandthecompressoriscoldandsweating.
TechnicianAsaysthatastuck-openexpansionvalvecouldbethecause.
TechnicianBsaysthatanoverchargedsystemcouldbethecause.
Whoisright?
(A)Aonly *(C)BothAandB
(B)Bonly (D)NeitherAnorB
8. AfterreplacingacondenserandchargingaschoolbusA/Csystem,thereis
alossofrefrigerant.Thiscouldbecausedby:
(A)bentcondenserns.
*(B)damagedO-rings.
(C)excessiverefrigerantoil.
(D)alowrefrigerantcharge.
Question 9 is not like the ones above.
IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcouldNOT
causethedescribedsituation.Readtheentirequestioncarefullybefore
choosingyouranswer.
9. ThedriverofaTypeDschoolbuscomplainsthatthereisnohotairwhentheblendvalvecontrolismovedfromCOLDtoHOT.Allofthesecouldbethe
causeEXCEPTthe:
*(A)Manualshutoffvalvesareopen. (C)Heatercoreltersareclogged.
(B)Coolantlevelislow. (D)Controlcableismisadjusted.
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PAGE44 ASE S chool BuSStudyGuidE
induSTryTrAining
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Florence,KY41022
1-800-487-8488
www.autoed.cengage.com
www.cengage.com/delmar
Motor Age Training or Certifcation131WestFirstStreet
Duluth,MN55802
800-240-1968
www.motorage.com
In Canada
Thomson Learning Nelson Canada1120BirchmountRoad
Scarborough,OntarioM1K5G41-800-268-222
E-mail:[email protected]
SpanishLanguageTrainingResources
Foralistingoftrainingproviderswhooffer
training,ortrainingmaterialsinSpanish
gotowww.ase.com;oncethere,enterthe
ServiceProfessionalsareaandclickon
SpanishLanguageTrainingResources.
CASE:ASECerticationforTrainingProvidersofContinuingAutomotiveService
Education.Visitwww.natef.org/case/case_certied.cfmforperiodicupdatestothislist.
TheNationalInstituteforAutomotiveServiceExcellence(ASE)anditseducational
foundation,theNationalAutomotiveTechniciansEducationFoundation(NATEF),offer
avoluntarycerticationprogramforinstitutionsandorganizationsprovidingcontinuing
automotiveserviceeducation.ASEseekstoimprovethequalityofcontinuingautomotive
educationandhelpautomotivetechniciansidentifyappropriatetrainingsourcesandactivitiesby
evaluatingandcertifyingprovidersofcontinuingautomotiveserviceeducationagainstCASEStandards.
TheCASEprogramdiffersfromASEsexistingentry-leveltrainingprogramcerticationin
thatitaddressesthetrainingprovidersprocessofdevelopinganddeliveringtrainingasopposed
toprescribingspecicprogramcontent.Elementsoforganization,structureandmethodswhich
appeartocontributesignicantlytothedevelopmentanddeliveryofhighqualityautomotive
serviceeducation,havebeenidentiedandincorporatedintotheCASEStandards.
ThefollowingtrainingprovidershaveachievedCASEcertication.Pleasenotethat*
indicatesaproprietaryprogramunavailabletoalltechnicians.
RecursosdeEducacinenEspaol
Paraobteneraccesoalalistadeproveedores
deeducacin,materialeseducativosen
Espaoldirjaseawww.ase.com;unavesall,
entreenlaseccinEspaolyprosigaalrea
ListadeEducadoresyMaterialesDidcticos.
MD PublicationsUndercarDigest,JulyIssue
TransmissionDigest,SeptemberIssue
P.O.Box2210
Springeld,MO65801
1-800-274-7890
Motor Source Guide
HearstBusinessPublishing,Inc.645StewartAve.
GardenCity,NY11530
www.motor.com
Fleet Equipment, April IssueP.O.Box7605
Mt.Prospect,IL60056-7605
www.truklink.com
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ASE School BuSStudyGuidE PAGE45
induSTryTrAining (conTinuEd)
3M Industrial and Transportation
Business Services Training and
Development3MCenterBuilding225-1N-01
St.Paul,MN55144
651-737-0141
www.3m.com/automotive
ACDelco Service Training6200GrandPointDr.,MC#2-316
GrandBlanc,MI48439
800-825-5886prompt1www.acdelcotechconnect.com
Afnia Under Vehicle GroupTechnicalServicesDepartment
4400PrimeParkway
McHenry,IL60050
815-363-9000askfortechnical
www.raybestos.com
AKZO NOBEL Coatings Inc.,Car Refnishes5555SpaldingDr.
Norcross,GA30092
770-242-5760
www.akzonobelcarrenishes.net
American Automobile Association, Inc.1000AAADr.
Heathrow,FL32746407-444-7169or407-444-8041
AllanStanley,[email protected]
LenJohannes,[email protected]
www.aaa.com
*American Honda Automobile Service
Training1919TorranceBlvd.
Torrance,CA90501
310-783-3557www.honda.com
Automotive Spray Equipment
Technologies (ASET)3703WestParkwayBlvd.
SaltLakeCity,UT84120
801-964-6646
www.asetusa.com
ATech Training, Inc12290ChandlerDr.
POBox297
Walton,KY41094
859-485-7229ext.109
www.atechtraining.com
BASF Automotive Refnish Division26701TelegraphRd.
Southeld,MI48034
248-304-5200
www.basfrenish.com
BP Global Fuels Technology150W.WarrenvilleRd.
800Building
Naperville,IL60563
312-729-4212
www.fuelcertication.com
Chie Automotive Systems
996IndustrialDr.Madison,IN47250
800-445-9262
www.chiefautomotive.com
CARQUEST Technical Institute4401AtlanticAve.
Raliegh,NC27604
919-573-3000
www.CARQUEST.com/CTI
Collision Management Services Inc.2040RLordBaltimoreDr.
Baltimore,MD21244
410-944-3383
www.ineedcms.com/Training.html
Delphi Integrated Service Solutions5820DelphiDr.
Troy,MI48098
800-545-2220
CustomerSupport
www.delphi-iss.com
DuPont Perormance Coatings500EagleviewBlvd.
Exton,PA19341
610-458-6323
www.pc.dupont.com
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induSTryTrAining (conTinuEd)
EAST Training Inc.4404SylonBlvd.
Hainesport,NJ08036
609-267-2223
www.easttraining.com
Federal Mogul Technical Education
Centers6565WellsAve.
St.Louis,MO63133
314-977-0684
www.federal-mogul.com
Fox Valley Technical College1825N.BluemoundDr.
Appleton,WI54912
920-993-5163
www.fvtc.edu/public
*General Motors Service Technical
College
30501VanDykeAve.,M/C480-204-100Warren,MI48090
586-947-9704
www.gmstc.com
Hunter Engineering11250HunterDr.
Bridgeton,MO63044
314-731-0000
www.hunter.com
I-CAR (Inter-Industry Conerence on
Auto Collision Repair)5125TrilliumBlvd.
HoffmanEstates,IL60192
800-422-7872
www.i-car.com
Iwata Medea
3703WestParkwayBlvd.WestValleyCity,UT87120
801-964-6646
www.asetusa.com
Jiy Lube International700Milam,Room24038PNT
Houston,TX77002
713-546-3957
www.jiffylube.com
Kent Automotive6200OakTreeBlvd.,#350
Independence,OH44131
216-642-5973
www.kent-automotive.com
Lawson State Community College11009thAve.,SW
Bessemer,AL35022
205-929-3521
www.lawsonstate.edu
Lew Kinney & Associates On-site
Welding Training and CertifcationsPOBox511,184StateRoute314
Centerburg,OH43011
740-625-6342
*Lexus, A Division o Toyota Motor
Sales, Inc., U.S.A.19001S.WesternAve.
Torrance,CA90509TechnicalTraining310-468-4958
www.lexus.com
Martin Senour Automotive Finishes7019HighgroveRd.
BurrRidge,IL60527
630-887-7516
www.martinsenour-autopaint.com
Megatech Corporation525WoburnSt.,Suite3
Tewksbury,MA01876
800-767-6342(US)
978-937-9600(Intl)
www.megatechcorp.com
Melior, Inc.200CahabaParkCircleWest,Suite250
Birmingham,AL35242205-298-8300
www.melioronline.com
National Automotive Parts Association
(NAPA)2999Circle75Pkwy.
Atlanta,GA30339
800-292-NIAT(6428)
www.niat-training.com
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ASE School BuSStudyGuidE PAGE47
induSTryTrAining (conTinuEd)
* This program is proprietary and therefore
not available to all technicians.
National Appraisal Institute10150CanogaAve
Chatsworth,CA91311818-775-1370
www.nainstitute.com
Nationwide Training Organization9243ColumbusPike
LewisCenter,OH43035
614-840-7169
www.nationwide.com
*Navistar, Inc.3033WayneTerrace
FortWayne,IN46806
260-461-1951
www.navistar.com
*Nissan North America, Inc.
Customer Loyalty and TrainingP.O.Box685001
Franklin,TN37068615-725-8319
www.nissantechinfo.com
*Penske Truck LeasingRoute10PheasantRd.,POBox563
Reading,PA19607
610-775-6479
www.gopenske.com
PPG Industries19699ProgressDr.
Strongsville,OH44149
440-572-6784
www.ppg.com
Raytheon Proessional Services L.L.C.1919TechnologyDr.
Troy,MI48083
248-837-6777
www.rps.com
Saint Gobain Abrasives1NewBondSt.
Worcester,MA01606
508-795-2774
www.nortonautomotive.com
www.aa.carborundumabrasives.com
SEM Products, Inc.1685OverviewDr.
RockHill,SC29730803-207-8231
www.semproducts.com
Sherwin-Williams Automotive Finishes
Corp.7019HighgroveRd.
BurrRidge,IL60527
630-887-7516
www.sherwin-automotive.com
Solera, Inc.P.O.Box151376
AltamonteSprings,FL32715
858-724-1600
www.training.audatex.us
Specialty Products Company4045SpecialtyPlace
Longmont,CO80504303-772-2103
www.spcalignment.com
Technical Training, Inc. (TTi)2750ProductDr.
RochesterHills,MI48309
248-853-5550or800-837-5222
www.ttinao.com
*Toyota Motor Sales, USA, Inc.19001S.WesternAve.
Torrance,CA90509-2991
310-468-7171
www.toyota.com
COPYRIGHT2011by
National Institute for
AUTOMOTIVE SERVICE EXCELLENCE
Allrightsreserved
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Name_______
_____________________
_____________________
ShopName_________________________
______________________
StreetAddress
_____________________________________________
City_________
______________________
_State_____Zip________
TelephoneNum
ber___________________
___
Pleasesend_____copiesofASEsRegistr
ationBooklet
includingtestregistrationforms.
Ivechecked(
)appropriatebox.
TechnicianEmployer,with_____technicians
UsethisformtorequestRegistrationBook
lets.Printinformation,
clipalongdotte
dlineatrightandmailentirecouponbackto:
ASE,
101BlueSealDr.,S.E.,Sui
te101,Leesburg,VA20175
Telephone:703-669-6600(
FAX:703-669-6123)
Downloadforms24/7atwww.ase.com!
NationalInstitutefor
AUTOMOTIVESERVIC
EEXCELLENCE
101BlueSealDr.,S.E.,Suite101
Leesburg,VA20175
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