School Bus Tests

8/3/2019 School Bus Tests

1/48

The OfficialASE Study Guide

ASE SchoolBus Tests


2/48

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


3/48

ASE School BuSStudyGuidE PAGE3

ovErviEw

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.


4/48

PAGE4 ASE S chool BuSStudyGuidE

ovErviEw (conTinuEd)

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.


5/48



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.


6/48



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.


7/48


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.



8/48



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.


9/48


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.


10/48


S1 TASkliST (conTinuEd)

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.


11/48


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)


12/48


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)


13/48


TEST SpEcificATionSAnd TASkliSTdiESEl EnginES (TEST S2)


A. General Engine Diagnosis 15 27%

B. In-Chassis Engine Inspection and Repair 6 11%

C. Lubrication and Cooling Systems


D. Air Induction and Exhaust Systems


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);


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.


14/48



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.


15/48



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.


16/48



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.


17/48


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)


18/48


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?



8. AHEUIenginerunspoorlyandmisres.Whileperforminganenginerunning

injectortest,afaultcodeissetforpoor#3cylindercontribution.TechnicianAsaysthatabadinjectoroncylinder#3couldbethecause.TechnicianBsays

thatabentpushrodoncylinder#3couldbethecause.Whoisright?





19/48


9. Thecauseofaloggedfaultcodeinanelectronicdieselenginehasjustbeen

repaired.

TechnicianAsaysthatthecodesshouldbeclearedbeforereleasingthevehicle.

TechnicianBsaysthatthecustomerspasswordshouldberesetbefore

releasingthevehicle.

Whoisright?

*(A)Aonly (C)BothAandB



IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcouldNOT causethedescribedsituation.Readtheentirequestioncarefullybefore

choosingyouranswer.

10. ATypeDschoolbushasexcessiveengineoilconsumptionandanoillmon

thebackofthebus.AllofthesecouldbethecauseEXCEPT:

(A)badturbochargerseals.

*(B)acrackedcylinderliner.

(C)wornpistonrings.

(D)wornvalveguideseals.



20/48


TEST SpEcificATionSAnd TASkliSTdrivE TrAin TEST (TEST S3)


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;


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.


21/48



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.


22/48



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).


23/48


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.


24/48


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



NOT causethedescribedsituation.Readtheentirequestioncarefullybefore

choosingyouranswer.

8. Aschoolbusdriverreportsthattheclutchslipswhenthebusisaccelerated.All

ofthesecouldbethecauseEXCEPT:

(A)Noclutchpedalfreeplay. (C)Wornpressureplatesprings.

(B)Awornclutchdisc. *(D)Excessiveywheelrunout.



25/48



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.


26/48



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);


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.


27/48



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);


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;


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).


28/48


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


29/48



4. Allthebrakesdragonaschoolbuswithhydraulicbrakes.Thisismostlikely

causedby:

(A)Airinthehydraulicsystem.

(B)Excessivevacuumsupplytothepowerbrakebooster.

(C)Aleakingsecondarycupinthemastercylinder.

*(D)Nobrakepedalfreetravel.

5. TechnicianAsaysthatthelowairpressurewarningsystemmustprovide

asignalthatthedrivercanhear.

TechnicianBsaysthatthelowairpressurewarningsystemmustprovide

asignalthatthedrivercansee.

Whoisright?



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.


30/48



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;


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.


31/48



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;


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;


2. Inspectandreplacefrontaxle,U-bolts,andnuts.

3. Inspect,serviceorreplacekingpin,steeringknucklebushings,locks,bearings,shims,

seals,andcovers.


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;


2. Inspectandreplacerearaxlehousing,U-bolts,andnuts.


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.


32/48



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;


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.


33/48


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?



4. Aschoolbushasagreaterturningradiusinonedirectionthanintheother.

Thiscouldbecausedby:

(A)Over-tightenedwheelbearingadjustment.

(B)Airinthehydraulicsystem.

(C)Incorrectpowersteeringuid.

*(D)Incorrectaxlestopadjustment.

5. Atechnicianndslowpumppressureduringapowersteeringpressuretest.Whichofthesecouldbethecause?

(A)Excessivehoseback-pressure

(B)Awornsteeringgear

(C)Ahighuidlevel

*(D)Awornpowersteeringpump


34/48


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.



NOT causethedescribedsituation.Readthequestioncarefullybefore

choosingyouranswer.

8. AllofthesemustbecheckedbeforealigningthefrontwheelsonaschoolbusEXCEPT:

(A)tirepressure.

(B)trimheight.

(C)wheelbearingadjustment.

*(D)tirebalance.



35/48


TEST SpEcificATionSAnd TASkliSTSElEcTricAl/ElEcTronic SySTEmS (TEST S6)


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.


36/48



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.


37/48



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.


38/48


1. Ifachargingsystemcheckshowsafullychargedbatteryandahighcharging

rate,thetechnicianshouldtestthe:

(A)Alternatordiodes. (B)Statorwindings.

*(C)Voltageregulator.

(D)Fieldcurrentdraw.

2. Bothheadlightsonaschoolbusaredimonhighbeam,andnormal

onlowbeam.

TechnicianAsaysthatapoorheadlightgroundcouldbethecause.

TechnicianBsaysthatashortedheadlightswitchcouldbethecause.

Whoisright?


(B)Bonly *(D)NeitherAnorB

3. Thehornsinthecircuitshownaboveonlyblowwhenajumperwireis

connectedbetweenterminals#1and#2ofthehornrelay.

TechnicianAsaysthatabadhornrelaycouldbethecause.

TechnicianBsaysthatagroundinthecircuitbetweenthehornrelayandthe

hornswitchcouldbethecause.

Whoisright?



SAmplE quESTionSElEcTricAl/ElEcTronic SySTEmS (TEST S6)

quESTionS:

BATTERY

HORNS

2 3

1

HORN RELAY

HORN SWITCH

20 AMPS


39/48



4. Whenthedoorisopenedandtheamberlightscancel,theredlightsdonot

illuminateonaschoolbuswithanelectronic8-lampwarningsystem.

TechnicianAsaysthatabadrelaycouldbethecause.

TechnicianBsaysthatabadmasterswitchcouldbethecause.

Whoisright?



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


40/48



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.


41/48



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;


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.


42/48


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?


*(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)


43/48



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?



8. AfterreplacingacondenserandchargingaschoolbusA/Csystem,thereis

alossofrefrigerant.Thiscouldbecausedby:

(A)bentcondenserns.

*(B)damagedO-rings.

(C)excessiverefrigerantoil.

(D)alowrefrigerantcharge.


IthasthewordEXCEPT.Forthisquestion,lookforthechoicethatcouldNOT

causethedescribedsituation.Readtheentirequestioncarefullybefore

choosingyouranswer.

9. ThedriverofaTypeDschoolbuscomplainsthatthereisnohotairwhentheblendvalvecontrolismovedfromCOLDtoHOT.Allofthesecouldbethe

causeEXCEPTthe:

*(A)Manualshutoffvalvesareopen. (C)Heatercoreltersareclogged.

(B)Coolantlevelislow. (D)Controlcableismisadjusted.


44/48


induSTryTrAining

Thefollowingsourcesofinformationprovidecomprehensivelistingsoftrainingresources

availabletoworkingtechnicians:

Delmar Cengage LearningP.O.Box6904

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


45/48


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


46/48



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


47/48



* 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


48/48

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

To:

Documents

School Bus Tests