the official ase study guide ase school bus...
TRANSCRIPT
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The Official ASE Study Guide
ASE School Bus Tests
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ASE School BuS TESTS
Overview ................................................................................................ 3–8
School Bus Tests ................................................................................... 9–43 • BodySystemsandSpecialEquipment(TestS1) ............................9 • DieselEngines(TestS2) ...............................................................13 • DriveTrain(TestS3) .....................................................................20 • Brakes(TestS4) ............................................................................25 • SuspensionandSteering(TestS5) ................................................30 • Electrical/ElectronicSystems(TestS6) ........................................35 • AirConditioningSystemsandControls(TestS7) ........................40
Industry Training ............................................................................... 44–47
Table of Contents
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IntroductionTheOfficial ASE Study Guide for the School Bus Testsisintendedtohelptechni-ciansstudyfortheASEcertificationtests.Thespecificmaterialabouteachtest,includedinthebookletisausefultoolforreviewingthetechnicalknowledgethatiscoveredintheSchool Bus tests.Afterperformingathoroughreview,itshouldbeeasiertoselectadditionalreferencematerialthatwillassistyouwiththetestpreparationneeds. ASEvoluntarycertificationisameansbywhichtechnicianscanprovetheirabilitiestothemselves,totheiremployers,andtotheircustomers.BypassingASEtestsyouwillearnthemostvaluablecredentialavailabletoschoolbustechnicians.Becausethetestsaretough,you’llhavethesatisfactionofprovingtoyourselfthatyouareamongtheeliteinyourprofession.What’smore,thesecredentialsarerecognizedthroughoutthenation. Certifiedtechnicianspromotecustomertrustandimprovetheimageoftheindustry.Andtrustandprofessionalismarethefirststepstoabetter,morepros-perousbusiness. ASEencouragesyoutotakethetestsandtojointheprovenproswhoweartheASEBlueSealofExcellence®.
How Do I Become Certified?TherearecurrentlyseventestsintheSchoolBusTechniciancertificationseries.Ifyoupassoneormoretests,andhaveatleasttwoyearsofhands-onworkingexperienceinschoolbusrepair,thenyouwillbecomecertifiedasanASESchoolBusTechnician.(Appropriatevocationaltrainingmaybesubstitutedforuptooneyearofworkexperience.) IfyoupasstestsS1throughS6,andmeettheexperiencerequirement,youwillearnthecertificateofMasterSchoolBusTechnician. IfyouarecurrentlycertifiedinDieselEngines(A9,H2,S2,orT2) andElectrical/ElectronicSystems(A6,H6,S6,orT6),youareeligibletotaketheL2ElectronicDieselEngineDiagnosisSpecialisttest. Ifyoufailatest,youmaytakeitagainduringanyscheduledtestadmin-istrationinwhichitisoffered.Andremember,youaretheonlyonewhowillreceiveyourtestsscores;resultswillnotbegivenoverthephonenorwilltheybereleasedtoanyonewithoutyourwrittenpermission.
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School Bus TestsASEtestsandcertifiestechniciansinthefollowingSchoolBusareas:• Body Systems and Special Equipment (Test S1)• DieselEngines(TestS2)• DriveTrain(TestS3)• Brakes(TestS4)• SuspensionandSteering(TestS5)• Electrical/ElectronicSystems(TestS6)• AirConditioningSystemsandControls(TestS7)
ASEalsoofferscertificationinAutomobile,Medium/HeavyTruck, TruckEquipment,CollisionRepair/Refinish,TransitBus,Parts SpecialistandAdvancedLevelspecialties.SeparateStudy Guidesareavailableforeachtestseries. ForfullinformationonASEtestingaswellasdownloadableStudy Guides,Registration Booklets,andmore,visitwww.ase.com.YoumayalsorequestRegistration BookletsbymailingthecouponlocatedonthebackcoverofthisbookletorbycallingASEat703-669-6600,ext.400.
Who Writes the Questions?Thequestions,writtenbyserviceindustryexpertsfamiliarwithallaspectsofschoolbusrepair,areentirelyjob-related.Theyaredesignedtotestknowledgeoftheskillsthatyouneedinservicingschoolbuses;theoreticalknowledgeisnotcovered. EachquestionhasitsrootsinanASE“item-writing”workshopwhereservicerepresentativesfromschoolbusmanufacturers,aftermarketpartsandequipmentmanufacturers,workingtechniciansandtechnicaleducatorsmeetinaworkshopsettingtoshareideasandtranslatethemintotestquestions.Eachtestquestionwrittenbytheseexpertsmustsurvivereviewbyallmembersofthegroup.Thequestionsarewrittentodealwithpracticalproblemsofdiagnosisandrepairexperiencedbytechniciansintheirday-to-daywork. Fromthere,allquestionsarepre-testedandquality-checkedonanationalsampleoftechnicians.ThosequestionsthatmeetASEstandardsofqualityandaccuracyareincludedinthescoredsectionsofthetests;the“rejects”aresentbacktothedrawingboardordiscardedaltogether. Eachcertificationtestismadeupofbetween45and55multiple-choicequestions.Thetestingsessionsare4hoursand15minutes,allowingplenty oftimetocompleteseveraltests.
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Note: Eachtestcouldcontainuptofifteenadditionalquestionsthatareincludedforstatisticalresearchpurposesonly.Youranswerstothesequestionswillnotaffectyourscore,butsinceyoudonotknowwhichonestheyare,youshouldanswerallquestionsinthetest.
How Do I Prepare for the ASE Tests?Becomefamiliarwithtestcontentandquestionformat:TheTestSpecificationsinthisbookletcontainasummarydescriptionofthecontentcoveredbyeachtest.TheTaskListsdescribetheactualworkperformedbytechniciansineachspecialtyarea.Together,theseforma“blueprint”forwritingandassemblingtheASEtests.Pleasenotethateachquestiononthetestiskeyed,orlinked,toaparticulartaskorsetoftasksinthetasklist.Therefore,areviewofthetasklists,withaneyetojudgingwhetheryouknowhowtoperformeachtasklisted,willprovideyouvaluableinformationasyouprepareforthetests. Therearefivetypesofmultiple-choicequestionsonthetests,eachofwhichisincludedinthesamplequestionsinthisbooklet.Notethedifferentinstructionsforsomequestions. Besuretoreadeachquestioncarefully,(twice,ifnecessary)sothatyouunderstandexactlywhatisbeingasked.Each question tests a specific diagnostic or repair problem and has only one correct answer. Tosummarize,wesuggestthefollowingstepsbetakentoprepareforthetests: Step 1. Studythecontentlistforeachtestyouwillattempt. Step2. Carefullyreadthetasklistforeacharea. Step3. Gooverthesamplequestionstobecomefamiliarwitheach questiontype.Thisisveryimportant. Step4. Reviewsteps1through3andidentifytheskillarea(s)where youneedadditionalstudy.
Types of Knowledge Measured By the TestsThetypesofknowledgeandskillsyouwillneedtoknowtopassthetestsareasfollows:• Basictechnicalknowledge:Testsyourknowledgeofwhatisinasystemandhowthesystemworks,andwhataretheproperproceduresandprecautionstobefollowedinmakingrepairsandadjustments.
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• Serviceorrepairknowledgeandskill:Testsyourunderstandingandabilitytoapplygenerallyacceptedrepairproceduresandprecautionsinassembly,disassembly,andreconditioningoperations;andinmakinginspectionsandadjustments.Alsotestsabilitytouseshopmanualsandprecisiontoolsofthetrade.
• Testinganddiagnosticknowledgeandskill:Testsyourabilitytorecognizeproblemsandtousegenerallyavailablemeasurementandtestingequipmenttomakeadiagnosis.Alsotestsyourabilitytotracetheeffectsofaparticularconditionandfindthecauseofaparticularsetofsymptoms.
Ifyouareanexperiencedandcompetenttechnician,acarefulreviewofthisbooklet,andadditionalbrush-uponthoseareasinwhichyouareweakest,isallyoushouldneedtopasstheASEtests.
Before The TestsTrytobewell-restedforthetestsoyouwillbealertandefficient.Ifyouaretak-ingthewrittenversions,pleasebringseveralsharpenedsoft-lead(#2)pencilsandaneraserwithyou;pencilswillnotbefurnishedatthetestcenter.Ifyouwishtopaceyourself,bringawatch;sometestingroomsmaynothaveclocks.Finally,besuretobringalongyourtestcenteradmissionticketandacurrentphotoI.D.
At the Test Center—Some TipsArriveearlyenoughtofindthebuildingandtestingroom.Whenyoureachthelocation,waitintheassignedareauntiltheproctorbeginsthetestadministration.Heorshewillinstructyouinfillingouttheanswerbooklet(iftakingwrittentests)orloggingontothecomputer(iftakingcomputer-basedtests). Oncetestinghasbegun,keeptrackoftime.Donotspendtoolongonanysinglequestion.Besuretoreadeachquestioncarefullysothatyouunderstandexactlywhatisbeingasked.Donotmarkanswersinthetestbooklet;theymustbemarkedontheanswerbooklet.Yourtestwillnotbescoredifyouranswersarenotonyouranswerbooklet. Ifaquestionisdifficult,marktheanswerthatyouthinkiscorrectandputacheckbyitinthetestbook.(Computer-basedtestsallowyoutodothisonscreen.)Thengoontothenextquestion.Ifyoufinishbeforetimeisup,youmaygobacktothequestionsthatyouchecked. Itistoyouradvantagetoanswereveryquestion.Donotleaveany answersblank.Yourscorewillbebasedonlyonthenumberofcorrect answersthatyougive.
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Test Content and Sample QuestionsThefollowingmaterialisdesignedtohelptechnicianspreparefortheASE certificationtests. EachsectionbeginswiththeTestSpecifications,whichwilllistthemaincategoriescoveredonthatparticulartestandthenumberoftestquestionsandpercentageofthetestdevotedtoeachtopic. TheTaskListdescribestheworkactivitiesatechnicianshouldbeabletoperformineachtechnicalareacoveredonthattest.Thislistwasdevelopedbyworkingtechniciansandtechnicalexpertsfromacrossthecountryandwillpro-videavaluablechecklistofwhattostudyforthetest. Thesetaskdescriptionsofferdetailedinformationtotechnicianspreparingforthetestandtopersonswhomaybeinstructingtechnicians.Thetasklistsmayalsoserveasguidelinesforquestionwriters,reviewers,andtestassemblers. Itshouldalsobenotedthatthenumberofquestionsineachcontentareamaynotequalthenumberoftaskslisted.Someofthetasksarecomplexandbroadinscopeandmaybecoveredbyseveralquestions.Othertasksaresimpleandnarrowinscopeandonequestionmaycoverseveraltasks.Themainobjectiveinlistingthetasksistodescribeaccuratelywhatisdoneonthejob,nottomakeeachtaskcorrespondtoaparticulartestquestion. Samplequestionsfollow.Althoughthesesamequestionswillnotappearonactualtests,theyareinthesameformatasactualtestquestions.Allfivetypesofmultiple-choicequestionsusedontheASEtestsarerepresentedhere.Notethedifferentinstructionsforsomequestions.
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School Bus Types Found on ASE Certification TestsTheTypeAschoolbusisaconversionorbodyconstructeduponavan-type orcutawayfront-sectionvehiclewithaleft-sidedriver’sdoor,designedforcarryingmorethan10personswithagrossvehicleweightrating(GVWR)of10,000poundsorless.The Type Bschoolbusisaconversionorbodyconstructedandinstalleduponafront-sectionvehiclechassis,orstrippedchassis,withagrossvehicleweightrating(GVWR)ofmorethan10,000pounds,designedforcarryingmorethan10persons.Partoftheengineisbeneathand/orbehindthewindshieldandbesidethedriver’sseat.Theentrancedoorisbehindthefrontwheels.TheTypeCschoolbusisabodyinstalleduponaflat-backcowlchassiswithagrossvehicleweightrating(GVWR)ofmorethan10,000pounds,designedforcarryingmorethan10persons.Theentireengineisinfrontofthewindshieldandtheentrancedoorisbehindthefrontwheels.TheTypeDschoolbusisabodyinstalleduponachassis,withtheenginemountedinthefront,midship,orrearwithagrossvehicleweightrating(GVWR)ofmorethan10,000pounds,anddesignedforcarryingmorethan 10persons.Theenginemaybebehindthewindshieldandbesidethedriver’sseat;itmaybeattherearofthebus,behindtherearwheels.Theentrancedoor isaheadofthefrontwheels.
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TEST SpEcificATionS And TASk liSTBody SySTEmS And SpEciAl EquipmEnT (TEST S1)
Content Questions Percentage Area 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. Safety and Emergency Equipment Systems Diagnosis and Repair (10 questions) 1. Inspectsafetyequipmentconditionandsecurity;serviceorreplaceasrequired
(fireextinguisher,firstaidkit,bodyfluidcleanupkit,reflectivetriangles,seatbeltcutter,etc.).
2. Checkconditionandoperationofseatbelts/tetherbelts,retractor,latchanddriver/passengerrestraintsystems;repairorreplaceasrequired.
3. Inspect,adjust,lubricate,repairorreplaceemergencyexits,doors,hatches,hold-opendevices,latches,hinges,handles,decals,andseals.
4. Checkoperationofstoparm(s)andcrossinggate(air-operated,vacuum,orelectric)warningdevices;serviceorreplaceasneeded.
5. Inspect,test,adjust,repairorreplaceelectricalcomponentsintheemergencyexitwarningsystems(roofhatches,push-outwindows,doors,etc.).
6. Inspect,test,andreplacereflectors,reflectivematerials,andlettering.
B. Body and Interior Maintenance (14 questions) 1. Inspectupholstery,foam,seatframe,andmountinghardwareofpassengerseats
(includingtrack,flip,childseats,etc.);repairorreplaceasrequired. 2. Inspect,diagnose,test,adjust,repairorreplaceupholstery,foam,seatframe(airand
manual,etc.)andmountinghardwarefordriver’sseat. 3. Inspectfloor,floorcovering,stepwell,wheelhouse,andmoldings;repairorreplace
asneeded. 4. Inspect,adjust,repairorreplaceentrydoors,liftdoors,andhandrails. 5. Checkmirrorsforclarity,mountingsecurity,andcondition;repairorreplaceas
required. 6. Inspect,adjust,repairorreplacebodymountingbolts,clips(tiedowns),outriggers,
shearbolts,crossmembers(floorsills),cowlmounts,andaccessorycompartments(battery,luggage)inaccordancewithmanufacturers’recommendedprocedures.
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7. Inspectchassisframeforcracks,breaks,distortion,looseness,anddamage;determineneededrepairs.
8. Checkalignmentandsecurityofenginecoverandseals;adjust,service,repairorreplaceasrequired.
9. Inspect,test,adjust,repairorreplacemanual,electric,orair-operatedentrydoorcontrolsincludingtheemergencyreleasesystems.
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;repairorreplaceaccordingtomanufacturers’recommendations. 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,flush,andreplaceheatercore,hoses,clamps,andcovers;bleedthesystem. 6. Performheatingsystemteststoincludecorrectflow,boosterpumpoperation,and
restrictors. 7. Checkconditionofheaterfiltersandexteriorofheatercore;cleanorreplace
accordingtomanufacturer’srecommendations. 8. Inspect,diagnose,test,repair,andreplaceheater/defrosterblowersanddefogger
fans,resistors,switches,relay/modules,sensors,wiring,connectors,andprotectiondevices.
9. Inspect,diagnose,test,service,orreplaceheating,ventilating,anddefrostingcontrolpanelassemblies,cables,andlinkages.
10. Inspect,diagnose,test,andreplaceheating,ventilating,anddefrostingsystemvacuumcontrolswitchesandhoses,diaphragms,vacuumpumps,vacuumreservoir,checkvalves,anddrivebelts.
11. Inspect,test,adjust,repair,orreplaceheating/ventilating/defrostingducts,doors,hoses,andoutlets.
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quESTionS:
1. Anair-operatedstoparmwillnotfullyextend.Whichoftheseisthemostlikelycause?
*(A)Lowairpressure (B)Bindinghingepivots (C)Astickingsolenoidvalve (D)Abrokenreturnspringpivot
2. Areplacementstudentwindowsideglassshould: (A)betempered. *(B)meetFMVSSrequirements. (C)belaminated. (D)bereplacedbyaglasscompany.
3. Whichoftheseisthebestlocationforaschoolbusfirstaidkit? (A)Thefloorbythestepwell (B)Ontherearemergencydoor (C)Inthetoolbox *(D)Inthedriver’sarea
4. TechnicianAsaysthatthepHlevelshouldbecheckedduringacoolanttest.TechnicianBsaysthatthefreezepointshouldbecheckedduringacoolanttest.Whoisright?
(A)Aonly *(C)BothAandB (B)Bonly (D)NeitherAnorB
5. Afterabrokenheaterhoseisrepaired,therightsideofthewindshieldwillnotdefrost.Themostlikelycauseis:
(A)thesystemwasoverfilled. *(B)airistrappedinthesystem. (C)thereplacementcoolantwasimproperlymixed. (D)theheaterfilterwasinstalledbackwards.
SAmplE quESTionSBody SySTEmS And SpEciAl EquipmEnT (TEST S1)
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6. OnatypeCschoolbus,thedefrosterblowerworksonlowandmediumspeed,butnotonthehighspeed.Themostlikelycauseisa:
(A)badcircuitbreaker. *(B)badcontrolswitch. (C)looseground. (D)cloggedheaterfilter. Question 7 is not like the ones above. IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcould
NOTcausethedescribedsituation.Readtheentirequestioncarefullybeforechoosingyouranswer.
7. Awheelchairlifthasadrifting/leakdownproblem.AllofthesecouldbethecauseEXCEPT:
(A)anopenmanualvalve. *(B)lowfluidlevel. (C)abadseal. (D)abadhydraulicpump.
S1 SAmplE quESTionS (conTinuEd)
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TEST SpEcificATionS And TASk liSTdiESEl EnginES (TEST S2)
Content Questions Percentage Area 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,andstartsbutdoesnot
continuetorunproblems;determineneededrepairs.11. Diagnosesurging,roughoperation,misfiring,lowpower,slowdeceleration,slow
acceleration,andengineshutoffproblems;determineneededrepairs.12. Isolateanddiagnoseenginerelatedvibrationproblems;determineneededrepairs.13. Checkcoolingsystemforcoolanttype,freezepoint,boilingpoint,contamination,
coolantlevel,temperature,pressure,conditionerconcentration(supplementalcoolantadditive),filtration,andfanoperation;determineneededrepairs.
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14. Checklubricationsystemforcontamination,oillevel,temperature,pressure, filtration,andoilconsumption;determineneededrepairs.Changeoilandfilters.
15. Connectdiagnostictooltovehicle/engineandverifysoftwaretocheck,record,andclearactiveandinactivediagnostictroublecodes(DTCs);monitorelectronicenginedata.
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-ringswherespecifiedby manufacturer.
5. Inspectvalvesprings,retainers,and/orrotaters,locksandseals,determineneededrepairs.
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;inspectthreadedholes,studs,dowelpinsandboltsforserviceability;service/replaceasneeded.
13. Measurelinerheight(protrusion)andcounterboredepth;determineneededrepairs.14. Inspect,measure,service/replacecrankshaftvibrationdamperandflywheel.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),andfilters. 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. Flushandrefillcoolingsystemwithcorrectcoolanttype;bleedairfromsystem.10. Inspect,repair/replacecoolantconditioner(supplementalcoolantadditive)filter,
checkvalves,lines,andfittings.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,andreplacewastegateandwastegatecontrols.
3. Inspect,repair/replaceintakemanifold,gaskets,temperatureandpressuresensors,andconnections.
4. Inspect,test,clean,replacechargeaircoolerandpipingsystem. 5. Inspect,repair/replaceexhaustmanifold,gaskets,piping,mufflers,exhaustaftertreat-
mentdevices,(includingthree-wayandoxidationcatalystanddieselparticulatefiltersDPF)andmountinghardware.
6. Inspect,test,andrepair/replacepreheater/inletairheater,orglowplugsystemandcontrols.
7. Inspect,test,andreplaceexhaustaftertreatmentregenerationsystemandcontrols. 8. Inspect,test,service,andreplaceEGRsystemcomponents;includingEGRvalve,
cooler,piping,filter,sensors,controls,andwiring.
E. Fuel System Diagnosis and Repair (15 questions) 1. Inspect,repair/replacefueltank,vent,cap,mounts,tankprotection(cages),valves,
screen,supplylines,returnlines,fittings,andseals. 2. Inspect,clean,test,repair/replacefueltransfer(lift)pump,pumpdrives,screens,
fuel/waterseparators/indicators,filters,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,fittings,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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12. Inspect,adjust,repair/replaceelectronicthrottlecontrols.13. Performon-engineinspectionsandtestsonhydraulicelectronicunitinjectors
(HEUI)andsystemcontrols(commonrailorrailpressurecontrol)andelectronic unitinjectionsystemcontrols.
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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ASE School BuS Study GuidE PAGE 17
quESTionS:
1. AdrivercomplainsthataTypeCschoolbushasexcessiveblacksmokewhenstartedinthemorning.Whichofthesecouldbethecause?
*(A)Abadfuelinjectionnozzle (B)Arestrictedfuelfilter (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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PAGE 18 ASE School BuS Study GuidE
5. Duringacoldweatherstart-up,theoilfilterruptures,causinganoilleak. Thiscouldbecausedby:
*(A)Astuck-closedoilfilterbypassvalve (B)Astuck-openoilpressureregulatorvalve (C)Useofahigh-viscositymotoroil (D)Excessiveenginerpm’satstart-up
6. Whatisthetechniciancheckingintheillustrationshownabove? (A)Valveprotrusion (B)Valverecession (C)Coolantnozzlerecession *(D)Cylinderheadwarpage 7. Duringadieselengineoverhaul,thecylinderlinersarefoundtohaveexcessive
externalcavitationerosion. TechnicianAsaysthatimproperlytreatedcoolantcouldbethecause. TechnicianBsaysthatanimproperantifreezetowatermix(ratio)couldbethecause. Whoisright?
(A)Aonly *(C)BothAandB (B)Bonly (D)NeitherAnorB
8. AHEUIenginerunspoorlyandmisfires.Whileperforminganenginerunninginjectortest,afaultcodeissetforpoor#3cylindercontribution.TechnicianAsaysthatabadinjectoroncylinder#3couldbethecause.TechnicianBsaysthatabentpushrodoncylinder#3couldbethecause.Whoisright?
(A)Aonly *(C)BothAandB (B)Bonly (D)NeitherAnorB
S2 SAmplE quESTionS (conTinuEd)
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9. Thecauseofaloggedfaultcodeinanelectronicdieselenginehasjustbeen repaired. TechnicianAsaysthatthecodesshouldbeclearedbeforereleasingthevehicle.TechnicianBsaysthatthecustomer’spasswordshouldberesetbefore releasingthevehicle. Whoisright?
*(A)Aonly (C)BothAandB (B)Bonly (D)NeitherAnorBQuestion 10 is not like the ones above. IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcould
NOT causethedescribedsituation.Readtheentirequestioncarefullybeforechoosingyouranswer.
10. ATypeDschoolbushasexcessiveengineoilconsumptionandanoilfilmonthebackofthebus.AllofthesecouldbethecauseEXCEPT:
(A)badturbochargerseals. *(B)acrackedcylinderliner. (C)wornpistonrings. (D)wornvalveguideseals.
S2 SAmplE quESTionS (conTinuEd)
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PAGE 20 ASE School BuS Study GuidE
TEST SpEcificATionS And TASk liSTdrivE TrAin TEST (TEST S3)
Content Questions Percentage Area 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. Inspectflywheelmountingareaoncrankshaft;determineneededrepairs. 8. Inspect,service,orreplaceflywheelandstarterringgear. 9. Measureflywheelfacerunout;determineneededrepairs.10. Inspectengineblock,flywheelhousing,andtransmissionhousingmatingsurfaces;
determineneededrepairs.11. Measureflywheelhousingborerunoutandflywheelhousingfacerunout;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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4. Checktransmissionfluidlevel,type,andcondition;determineneededserviceand addpropertypeoflubricant.
5. Inspect,adjust,andreplacetransmissionshiftlever,cover,rails,forks,levers, bushings,sleeves,detents,interlocks,springs,andlockbolts.
6. Inspectandreplacespeedometerdrivegearratioadapters,drivengear,cable,andretainers.
7. Inspect,test,orreplacespeedometerspeedsensor. 8. Inspectandtestbackuplightandwarningdevicecircuitswitches.
C. Automatic Transmission Diagnosis and Repair (25 questions) 1. Diagnosenoise,vibration,andshiftingproblems;determineneededrepairs. 2. Checktransmissionfluidlevel;diagnosefluidusageandcondition;determineneeded
serviceandaddpropertypeoflubricant. 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. Replacefluidandfilter(s).10. Checkdipstickcalibration.11. Inspect,testand/orreplacegovernor,governorcover,andgasket.12. Inspectandreplaceexternalsealsandgaskets.13. Inspect,test,flush,andreplacecooler,lines,filtersandfittings.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/ingearandreverseswitches,warningdevices,andwiringharnesses.
18. Inspect,testoperation,repair,orreplaceelectronicshiftselectors(drivercontrols),switches,displays,indicators,andwiringharnesses.
19. Useappropriatediagnostictoolsandsoftware,procedures,andserviceinformation/flowchartstodiagnoseautomatictransmissionproblems;checkandrecord diagnosticcodes,clearcodes,interpretdigitalmultimeter(DMM)readings, determineneededrepairs.
20. Diagnoseautomatictransmissionproblemscausedbydatalink/businterfaceswithrelatedelectroniccontrolsystems.
21. Inspect,replace,andaligntransmissionmounts.22. Removeandreplacetransmission;inspectflexplate.23. Remove,inspect,andreplacetorqueconverter.24. Inspectengineblock,flywheelhousing,transmissionmatingsurfaces,andengine-
to-transmissionmountingadapters;determineneededrepairs.25. Diagnosetransmissionbrakeproblems;determineneededrepairs.
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D. Drive Shaft and Universal Joint Diagnosis and Repair (5 questions) 1. Diagnosedriveshaftanduniversaljointnoiseandvibrationproblems;determine
neededrepairs. 2. Inspect,service,orreplacedriveshaft,slipjoints,yokes,driveflanges,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;determineneeded
repairs. 2. Checkandrepairfluidleaks;inspectandreplacerearaxledriveunitcoverplates,
gaskets,vents,magneticplugs,andpinionseals. 3. Checkrearaxledriveunitfluidlevelandcondition;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,andaxleflangegasket;adjustrearwheelbearings.
10. Inspectorreplaceextendedservice(sealed,close-tolerance,andunitized)bearingassemblies;performinitialinstallationadjustmentprocedures.
11. Check,adjust,andreplacewheelspeedsensor(s).
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ASE School BuS Study GuidE PAGE 23
SAmplE quESTionSdrivE TrAin (TEST S3)
quESTionS:
1. ATypeAschoolbuswithanoverdrivetransmissionandacomputer-controlledlock-upconverterhasshiftsthatareearlyandverysoft.Themostlikely causeis:
*(A)Animproperlyadjustedthrottlevalve(TV)cable. (B)Aslippingconverterclutch. (C)Aworngovernorgear. (D)Ashortedconverterclutchsolenoid. 2. TechnicianAsaysthatavibrationinthedrivelinecouldbecausedbyexcessive
universaljointmovement. TechnicianBsaysthatavibrationinthedrivelinecouldbecausedbyan incorrectuniversaljointoperatingangle. Whoisright?
(A)Aonly (B)Bonly *(C)BothAandB (D)NeitherAnorB 3. Theautomatictransmissionfluidofaschoolbusisdiscoloredandhasan
unusualodor.Themostlikelycauseis: (A)Overrunningtheenginegovernor. *(B)Overheatingthetransmission. (C)Adraggingspring(parking)brake. (D)Impropergearselection. 4. Thefluidlevelinaschoolbusautomatictransmissionshouldbechecked
withthe: (A)Engineshutoffatnormaloperatingtemperatures. (B)EngineshutoffandthetransmissioninNEUTRAL. (C)EnginerunningandthetransmissioninDRIVE,atnormaloperating
temperatures. *(D)EnginerunningandthetransmissioninPARK,atnormaloperating
temperatures.
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PAGE 24 ASE School BuS Study GuidE
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)Alowtransmissionfluidlevel (D)Astuckone-wayclutch Question 8 is not like the ones above. IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcould
NOT causethedescribedsituation.Readtheentirequestioncarefullybeforechoosingyouranswer.
8. Aschoolbusdriverreportsthattheclutchslipswhenthebusisaccelerated.AllofthesecouldbethecauseEXCEPT:
(A)Noclutchpedalfreeplay. (C)Wornpressureplatesprings. (B)Awornclutchdisc. *(D)Excessiveflywheelrunout.
S3 SAmplE quESTionS (conTinuEd)
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ASE School BuS Study GuidE PAGE 25
Content Questions Percentage Area 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 SpEcificATionS And TASk liSTBrAkES (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,oilandwaterlinesandfittings. 6. Inspect,test,adjust,orreplacesystempressurecontrols(governor/reliefvalve),
unloaderassemblyvalves,pressureprotectionvalves,andfilters. 7. Inspect,repair,orreplaceairsystemlines,hoses,fittings,andcouplings. 8. Inspect,test,clean,orreplaceairtankrelief(pop-off)valves,one-waycheckvalves,
draincocks,automaticdrain(spitter)valves,heaters,wiring,andconnectors. 9. Inspect,clean,repair,orreplaceairdriersystems,filters,valves,heaters,wiring,
andconnectors.10. Inspect,test,adjust,repair,orreplacebrakeapplication(foot/treadle)valve,fittings,
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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14. Inspect,test,andreplaceinversionandemergency(spring)brakecontrolvalve(s).15. Inspect,test,repair,orreplacelowpressurewarningdevices.16. Inspect,test,andreplaceairpressuregauges,lines,andfittings.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)andmodulatorvalves;test,repair,andreplacewiringandconnectors.
2. Mechanical/Foundation (9 questions) 1. Diagnosepoorstopping,brakenoise,pulling,grabbing,ordraggingproblemscaused
byfoundationbrake,slackadjuster,andbrakechamberproblems;determineneededrepairs.
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,andfittings. 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,flexiblehoses,andfittings. 6. Inspect,test,andreplacemetering(hold-off),proportioning,andcombinationvalves. 7. Inspect,test,orreplacebrakepressuredifferentialvalveandwarninglightcircuit
switch,bulbs,wiring,andconnectors. 8. Inspect,andreplacewheelcylinders.
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9. Remove,inspect,clean,andreplacediscbrakecaliperassemblies.10. Inspect/testbrakefluid;bleedand/orflushhydraulicsystem.11. Performantilockbrakesystem(ABS)warninglampstart-uptest;determineneeded
repairs;diagnosehardfaultcodes/diagnostictroublecodes(DTCs)usingscantool,PCcomputer,orLEDs;determineneededrepairs.
12. Diagnosepoorstoppingandlockupproblemsonantilockbrakesystems(ABS);determineneededrepairs.
13. Test,adjust,orreplaceantilockbrakesystem(ABS)wheelspeedsensorsandtone/exciterrings.
14. Testandreplaceantilockbrakesystem(ABS),electroniccontrolunits(ECU)andmodulatorvalves;test,repair,andreplacewiringandconnectors.
15. Inspect,test,andreplaceparkingbakeinterlockvalves,modules,wiring,and connectors.
2. Mechanical System (6 questions) 1. Diagnosepoorstopping,noise,pulling,grabbing,dragging,orpedalpulsation
complaintscausedbydrumanddiscbrakemechanicalassemblyproblems;determineneededrepairs.
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. Adjustaxlewheelbearingsinaccordancewithmanufacturers’proceduresand
specifications(includesstandardandunitized).
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PAGE 28 ASE School BuS Study GuidE
SAmplE quESTionSBrAkES (TEST S4)
quESTionS:
1. Theparkingbrakesfailtoapplyonaschoolbuswithairbrakes. TechnicianAsaysthatlowairpressureinthespringbrakechambercouldbethecause. 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.
TechnicianAsaysthattravelXshouldbeasshortaspossiblewithoutcausingthebrakestodrag. TechnicianBsaysthatangleYshouldbelessthan90°whenthebrakes areapplied. Whoisright?
*(A)Aonly (B)Bonly (C)BothAandB (D)NeitherAnorB
Y
X
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ASE School BuS Study GuidE PAGE 29
S4 SAmplE quESTionS (conTinuEd)
4. Allthebrakesdragonaschoolbuswithhydraulicbrakes.Thisismostlikelycausedby:
(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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PAGE 30 ASE School BuS Study GuidE
Content Questions Percentage Area 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 SpEcificATionS And TASk liSTSuSpEnSion And STEEring (TEST S5)
A. Steering System Diagnosis and Repair (18 questions)1. Diagnosesteeringcolumn(tiltandfixed)shaftnoise,looseness,andbinding
problems;determineneededrepairs.2. InspectandreplacesteeringshaftU-joint(s),slipjoints,bearings,bushings,andseals;
phaseshaftU-joints.3. Diagnosepowersteeringsystemnoises,steeringbinding,uneventurningeffort,
looseness,hardsteering,overheating,fluidleakage,andfluidaerationproblems;determineneededrepairs.
4. Inspectpowersteeringfluidlevelandcondition;determineneededserviceandfluidtype.
5. Purgeairfromthepowersteeringsystem.6. Performpowersteeringsystempressureandflowtests;determineneededrepairs.7. Inspect,service,orreplacepowersteeringreservoirincludinghoses,filter,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,andfittings.13. Inspect,adjust,orreplaceintegral-typepowersteeringgear.14. Inspectandreplacepitmanarm.
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S5 TASk liST (conTinuEd)
15. Inspect,adjust,orreplacedraglink/centerlink,tierods,andends;positionadjustingsleeves,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,andfittings.8. Inspect,test,repair,orreplaceairbags,springs,shims,mountingplates,suspension
arms,bushings,pinsandbolts.
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S5 TASk liST (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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ASE School BuS Study GuidE PAGE 33
SAmplE quESTionSSuSpEnSion And STEEring (TEST S5)
quESTionS:
1. Whichofthesecouldcausethefronttiresofaschoolbustoshowafeatherededgewearpattern?
*(A)Awrongtoesetting (C)Awrongcastersetting (B)Awrongcambersetting (D)Wrongtirepressures 2. Excessivesteeringwheelfreeplaymaybeanindicationof: (A)Aloosepowersteeringpumpdrivebelt. (B)Improperlyadjustedaxlestops. (C)Contaminatedpowersteeringfluid. *(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)Incorrectpowersteeringfluid. *(D)Incorrectaxlestopadjustment. 5. Atechnicianfindslowpumppressureduringapowersteeringpressuretest.
Whichofthesecouldbethecause? (A)Excessivehoseback-pressure (B)Awornsteeringgear (C)Ahighfluidlevel *(D)Awornpowersteeringpump
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PAGE 34 ASE School BuS Study GuidE
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 SpEcificATionS And TASk liSTSElEcTricAl/ElEcTronic SySTEmS (TEST S6)
Content Questions Percentage Area 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-Lamp and 8-Lamp Warning Systems (8) F. Gauges and Instrument Warning Device Diagnosis and Repair 4 9% G. Miscellaneous 5 11%
Total 45 100%
A. General Electrical System Diagnosis (4 questions) 1. Checkcontinuityinelectrical/electroniccircuitsusingappropriate
testequipment. 2. Checkappliedvoltages,circuitvoltages,andvoltagedropsinelectrical/electronic
circuitsusingadigitalmultimeter(DMM). 3. Checkcurrentflowinelectrical/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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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,andmounting
brackets. 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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2. Diagnosethecauseofnoturnsignalandhazardflasherlightsandindicators,orlightswithnoflashononeorbothsides.
3. Inspect,test,repair,orreplaceturnsignalandhazardcircuitflasher,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/flasherunits,andactuators.
6. Inspect,test,repairorreplace4-lampand8-lampwarningsystems(electronic, sequentialandnon-sequential),stoparmlights,switches,relays,diodes,control/flasherunits,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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1. Ifachargingsystemcheckshowsafullychargedbatteryandahighchargingrate,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. TechnicianBsaysthatagroundinthecircuitbetweenthehornrelayandthehornswitchcouldbethecause. 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. Whichofthesecouldcausethedriver’sheaterblowermotortooperateatlow
speedonly? (A)Anopenground (C)Abindingblowercage *(B)Abadheaterswitch (D)Awiringshorttotheheater
Questions 7 and 8 are not like the ones above. EachofthesehasthewordEXCEPT.Foreachquestion,lookforthe
choicethatcouldNOT causethedescribedsituation.Readtheentirequestioncarefullybeforechoosingyouranswer.
7. AllofthesecouldcausehighstartercurrentdrawEXCEPT: (A)Wornstarterbushings *(B)Abadstarterrelay (C)Groundedfieldcoils (D)Agroundedarmature 8. Schoolbuseswhicharenotoperatedduringthesummerformorethan30days
shouldhaveallofthesedonetothebatteriesEXCEPT: (A)Removedandstored (B)Periodicallytestedandcharged (C)Disconnectthenegativecable *(D)Replacetheelectrolyte
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PAGE 40 ASE School BuS Study GuidE
Content Questions Percentage Area 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 Controls Diagnosis and Repair 12 27% D. Refrigerant Recovery, Recycling, and Handling 3 6%
Total 45 100%
TEST SpEcificATionS And TASk liSTAir condiTioning SySTEmS And conTrolS (TEST S7)
A. A/C System Diagnosis and Repair (16 questions) 1. DiagnosethecauseofunusualoperatingnoisesoftheA/Csystem;determineneeded
repairs. 2. IdentifysystemtypeandconductperformancetestontheA/Csystem;determine
neededrepairs. 3. DiagnoseA/Csystemproblemsindicatedbyrefrigerantflowpastthesightglass
(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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ASE School BuS Study GuidE PAGE 41
S7 TASk liST (conTinuEd)
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/Csystemmufflers,hoses,lines,in-linefilters,fittings,
andseals. 2. InspectA/Ccondenserforairflowrestrictions;cleanandstraightenfins. 3. Inspect,repairorreplaceA/Csystemcondensercoil,condenserchassis,and
mountings. 4. Removeandreplacereceiver/drier. 5. Removeandreplaceaccumulator/drier. 6. Inspect,test,andreplaceexpansionvalve. 7. Inspect,test,andreplaceorificetube. 8. Inspect,clean,orreplaceevaporatorandinletairfilter. 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. Refrigerant Recovery, Recycling, and Handling (3 questions)Tasks1through5shouldbeaccomplishedinaccordancewithcurrentEPA regulationsandSAEstandardsformotorvehiclerefrigerants. 1. Maintainandverifycorrectoperationofcertifiedequipment. 2. IdentifyandrecoverA/Csystemrefrigerantandcontainers. 3. Recyclelabelandstore,properlydisposeofrefrigerant,testfornon-condensables
andcontamination.
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PAGE 42 ASE School BuS Study GuidE
quESTionS:
1. TheA/CsystemonaTypeAschoolbusisblowingcool,butnotcold,air fromthedashducts.Thesystemhasthecorrectchargeandthepressuregaugereadingsarenormal.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)Arestrictedrefrigerantflowinthecondenser (C)Arestrictedairflowoverthecondenser (D)Acompressorclutchthatwillnotdisengage 4. Thehigh-sidepressurereaches300psiwithin15secondswhenthecompressor
onanA/Csystemisengaged. TechnicianAsaysthatabadcompressorcouldbethecause. TechnicianBsaysthatarestrictionintheevaporatorcouldbethecause. Whoisright?
(A)Aonly (C)NothAandB (B)Aonly *(D)NeitherAnorB
SAmplE quESTionSAir condiTioning SySTEmS And conTrolS (TEST S7)
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ASE School BuS Study GuidE PAGE 43
S7 SAmplE quESTionS (conTinuEd)
5. WhichofthesecomponentsshouldbereplacedwhenanA/Csystemisfoundtohaveexcessivemoisture?
(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)bentcondenserfins. *(B)damagedO-rings. (C)excessiverefrigerantoil. (D)alowrefrigerantcharge. Question 9 is not like the ones above. IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcouldNOT
causethedescribedsituation.Readtheentirequestioncarefullybefore choosingyouranswer.
9. ThedriverofaTypeDschoolbuscomplainsthatthereisnohotairwhentheblendvalvecontrolismovedfromCOLDtoHOT.AllofthesecouldbethecauseEXCEPTthe:
*(A)Manualshutoffvalvesareopen. (C)Heatercorefiltersareclogged. (B)Coolantlevelislow. (D)Controlcableismisadjusted.
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PAGE 44 ASE School BuS Study GuidE
induSTry TrAining
Thefollowingsourcesofinformationprovidecomprehensivelistingsoftrainingresourcesavailabletoworkingtechnicians:
Delmar Cengage LearningP.O.Box6904Florence,KY410221-800-487-8488www.autoed.cengage.comwww.cengage.com/delmar
Motor Age Training for Certification131WestFirstStreetDuluth,MN55802800-240-1968www.motorage.com
In Canada
Thomson Learning Nelson Canada1120BirchmountRoadScarborough,OntarioM1K5G41-800-268-222E-mail:[email protected]
SpanishLanguageTrainingResourcesForalistingoftrainingproviderswhooffertraining,ortrainingmaterialsinSpanishgotowww.ase.com;oncethere,enterthe“ServiceProfessionals”areaandclickon“SpanishLanguageTrainingResources.”
CASE:ASECertificationforTrainingProvidersofContinuingAutomotiveServiceEducation.Visitwww.natef.org/case/case_certified.cfmforperiodicupdatestothislist. TheNationalInstituteforAutomotiveServiceExcellence(ASE)anditseducationalfoundation,theNationalAutomotiveTechniciansEducationFoundation(NATEF),offeravoluntarycertificationprogramforinstitutionsandorganizationsprovidingcontinuingautomotiveserviceeducation.ASEseekstoimprovethequalityofcontinuingautomotiveeducationandhelpautomotivetechniciansidentifyappropriatetrainingsourcesandactivitiesbyevaluatingandcertifyingprovidersofcontinuingautomotiveserviceeducationagainstCASEStandards. TheCASEprogramdiffersfromASE’sexistingentry-leveltrainingprogramcertificationinthatitaddressesthetrainingprovider’sprocessofdevelopinganddeliveringtrainingasopposedtoprescribingspecificprogramcontent.Elementsoforganization,structureandmethodswhichappeartocontributesignificantlytothedevelopmentanddeliveryofhighqualityautomotiveserviceeducation,havebeenidentifiedandincorporatedintotheCASEStandards. ThefollowingtrainingprovidershaveachievedCASEcertification.Pleasenotethat*indicatesaproprietaryprogramunavailabletoalltechnicians.
RecursosdeEducaciónenEspañolParaobteneraccesoalalistadeproveedoresdeeducación,ómaterialeseducativosenEspañoldiríjaseawww.ase.com;unavesallí,entreenlasección“Español”yprosigaalárea“ListadeEducadoresyMaterialesDidácticos.”
MD PublicationsUndercarDigest,JulyIssueTransmissionDigest,SeptemberIssueP.O.Box2210Springfield,MO658011-800-274-7890
Motor Source GuideHearstBusinessPublishing,Inc.645StewartAve.GardenCity,NY11530www.motor.com
Fleet Equipment, April IssueP.O.Box7605Mt.Prospect,IL60056-7605www.truklink.com
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ASE School BuS Study GuidE PAGE 45
induSTry TrAining (conTinuEd)
3M Industrial and Transportation Business Services Training and Development3MCenterBuilding225-1N-01St.Paul,MN55144651-737-0141www.3m.com/automotive
ACDelco Service Training6200GrandPointDr.,MC#2-316GrandBlanc,MI48439800-825-5886prompt1www.acdelcotechconnect.com
Affinia Under Vehicle GroupTechnicalServicesDepartment4400PrimeParkwayMcHenry,IL60050815-363-9000–askfortechnicalwww.raybestos.com
AKZO NOBEL Coatings Inc., Car Refinishes5555SpaldingDr.Norcross,GA30092770-242-5760www.akzonobelcarrefinishes.net
American Automobile Association, Inc.1000AAADr.Heathrow,FL32746407-444-7169or407-444-8041AllanStanley,[email protected],[email protected]
*American Honda Automobile Service Training1919TorranceBlvd.Torrance,CA90501310-783-3557www.honda.com
Automotive Spray Equipment Technologies (ASET)3703WestParkwayBlvd.SaltLakeCity,UT84120801-964-6646www.asetusa.com
ATech Training, Inc12290ChandlerDr.POBox297Walton,KY41094859-485-7229ext.109www.atechtraining.com
BASF Automotive Refinish Division26701TelegraphRd.Southfield,MI48034248-304-5200www.basfrefinish.com
BP Global Fuels Technology150W.WarrenvilleRd.800BuildingNaperville,IL60563312-729-4212www.fuelcertification.com
Chief Automotive Systems996IndustrialDr.Madison,IN47250800-445-9262www.chiefautomotive.com
CARQUEST Technical Institute4401AtlanticAve.Raliegh,NC27604919-573-3000www.CARQUEST.com/CTI
Collision Management Services Inc.2040RLordBaltimoreDr.Baltimore,MD21244410-944-3383www.ineedcms.com/Training.html
Delphi Integrated Service Solutions5820DelphiDr.Troy,MI48098800-545-2220 CustomerSupportwww.delphi-iss.com
DuPont Performance Coatings500EagleviewBlvd.Exton,PA19341610-458-6323www.pc.dupont.com
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PAGE 46 ASE School BuS Study GuidE
induSTry TrAining (conTinuEd)
EAST Training Inc.4404SylonBlvd.Hainesport,NJ08036609-267-2223www.easttraining.com
Federal Mogul Technical Education Centers 6565WellsAve.St.Louis,MO63133314-977-0684www.federal-mogul.com
Fox Valley Technical College1825N.BluemoundDr.Appleton,WI54912920-993-5163www.fvtc.edu/public
*General Motors Service Technical College30501VanDykeAve.,M/C480-204-100Warren,MI48090586-947-9704www.gmstc.com
Hunter Engineering11250HunterDr.Bridgeton,MO63044314-731-0000www.hunter.com
I-CAR (Inter-Industry Conference on Auto Collision Repair)5125TrilliumBlvd.HoffmanEstates,IL60192800-422-7872www.i-car.com
Iwata Medea3703WestParkwayBlvd.WestValleyCity,UT87120801-964-6646www.asetusa.com
Jiffy Lube International700Milam,Room24038PNTHouston,TX77002713-546-3957www.jiffylube.com
Kent Automotive6200OakTreeBlvd.,#350Independence,OH44131216-642-5973www.kent-automotive.com
Lawson State Community College11009thAve.,SWBessemer,AL35022205-929-3521www.lawsonstate.edu
Lew Kinney & Associates On-site Welding Training and CertificationsPOBox511,184StateRoute314Centerburg,OH43011740-625-6342
*Lexus, A Division of Toyota Motor Sales, Inc., U.S.A.19001S.WesternAve.Torrance,CA90509TechnicalTraining310-468-4958www.lexus.com
Martin Senour Automotive Finishes7019HighgroveRd.BurrRidge,IL60527630-887-7516www.martinsenour-autopaint.com
Megatech Corporation525WoburnSt.,Suite3Tewksbury,MA01876800-767-6342(US)978-937-9600(Int’l)www.megatechcorp.com
Melior, Inc.200CahabaParkCircleWest,Suite250Birmingham,AL35242205-298-8300www.melioronline.com
National Automotive Parts Association (NAPA)2999Circle75Pkwy.Atlanta,GA30339800-292-NIAT(6428)www.niat-training.com
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ASE School BuS Study GuidE PAGE 47
induSTry TrAining (conTinuEd)
* This program is proprietary and therefore not available to all technicians.
National Appraisal Institute10150CanogaAveChatsworth,CA91311818-775-1370www.nainstitute.com
Nationwide Training Organization9243ColumbusPikeLewisCenter,OH43035614-840-7169www.nationwide.com
*Navistar, Inc.3033WayneTerraceFortWayne,IN46806260-461-1951www.navistar.com
*Nissan North America, Inc. Customer Loyalty and TrainingP.O.Box685001Franklin,TN37068615-725-8319www.nissantechinfo.com
*Penske Truck LeasingRoute10PheasantRd.,POBox563Reading,PA19607610-775-6479www.gopenske.com
PPG Industries19699ProgressDr.Strongsville,OH44149440-572-6784www.ppg.com
Raytheon Professional Services L.L.C.1919TechnologyDr.Troy,MI48083248-837-6777www.rps.com
Saint Gobain Abrasives1NewBondSt.Worcester,MA01606508-795-2774www.nortonautomotive.comwww.aa.carborundumabrasives.com
SEM Products, Inc.1685OverviewDr.RockHill,SC29730803-207-8231www.semproducts.com
Sherwin-Williams Automotive Finishes Corp. 7019HighgroveRd.BurrRidge,IL60527630-887-7516www.sherwin-automotive.com
Solera, Inc.P.O.Box151376AltamonteSprings,FL32715858-724-1600www.training.audatex.us
Specialty Products Company4045SpecialtyPlaceLongmont,CO80504303-772-2103www.spcalignment.com
Technical Training, Inc. (TTi)2750ProductDr.RochesterHills,MI48309248-853-5550or800-837-5222www.ttinao.com
*Toyota Motor Sales, USA, Inc.19001S.WesternAve.Torrance,CA90509-2991310-468-7171www.toyota.com
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National Institute for
AUTOMOTIVE SERVICE EXCELLENCE
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