Computerized Engine Controls 11th Edition By Steve Hatch, Tim Gilles, Cengage (Test Bank).pdf

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d d d d d d d d d d
Name: Class: Date:

Chapter 2 d

ComputersdindCars

1. Whatddecimald(based10)dvaluedisdrepresenteddbydthedbinarydcoded“10110011”?
a. 14 b.d115
c.d179
d.d243dAN
SWER:d cd POINTS:1

2. Whatddoesdad“bauddrate”dofd41,600dmean?
a. 41,600dbitsdaredcommunicateddperdsecond b.d41,600dbitsdaredcommunicateddperdminute
c.d41,600dbytesdaredcommunicateddperdsecond d.d41,600dbytesdaredcommunicateddperdminute
ANSWER:d a
POINTS: 1

3. Adscandtooldisddisplayingdthedhexadecimaldvaluedfordthedbinarydcoded“1010000100111110”.d Whichdhexdvaluedis
ddisplayeddondthedscandtool?
a. $A13E b.d$1010
c.d$B2CF d.d$A690
ANSWER:d a
POINTS: 1

4. Whichdcomponentdisdadmemorydtypedthatdallowsdthedmicroprocessordtodchangedthedinformationdthatdisdstoreddindit?
a. ROM b.dPROM
c.dRAM d.dCPU
ANSWER:d b
POINTS: 1

5. Whichdcomponentdindandenginedcomputerdisdadvolatiledmemorydanddstoresdsensordinputdvaluesduntildupdated,ds
trategydresults,dfueldtrimddata,danddmemorydtypedfaultdcodes?
a. ROM b.dPROM
c.dRAM d.dCPU
ANSWER:d c
POINTS: 1

6. Whichdofdthedfollowingddefinesdadcomputerdinput?
a. Voltaged&dgrounddsupplieddtodpowerdupdthedcomputer b.dAdsignaldfromdadsensordthatdmeasures
variousdconditions
c. Storeddinformationdindmemorydthatdthedcomputerdusesd d. Adcommanddsignaldtodadrelay,dadmotor,dord
indmakingddecisions adsolenoid
ANSWER:d b
POINTS: 1

7. TechniciandAdsaysdthatdadPCMdusesdandoutputdactuatordtodkeepditselfdinformeddofdenginedoperatingdcondition
s.d TechniciandBdsaysdthatdadPCMdusesdandoutputdactuatordtodcausedadchangedindthedperformancedofda

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d d d d d d d d d d
Name: Class: Date:

Chapter 2 d

ComputersdindCars

circuitdordsystem.dWhodisdcorrect?
a. TechniciandAdonly b.dTechniciandBdonly
c.dBothdAdanddB d.dNeitherdAdnordB
ANSWER:d b
POINTS: 1



8.

ConcerningdthedlogicdgatedpictureddindFigured3dabove,dwhichdconditiondwoulddproducedbinaryd"one"dford“C”d(thedoutput)
?
a. “A”disdad“zero”dandd“B”disdad“one” b.d“A”disdad“one”dandd“B”disdad“zero”
c.d“A”dandd“B”daredbothd“ones” d.dAlldofdthedabove
ANSWER:d c
POINTS: 1

9. Advehicle’sdenginedcomputerddoesdnotdoperatedproperly.d Thedvehicle’sdbatterydisdcheckeddwithdadDVOMdanddh
asdandopendcircuitdvoltagedofd8.3dvolts.
TechniciandAdsaysdthatdthedPCMdisdprobablyddefectivedanddshoulddbedreplaced.dTechniciandBdsaysdthat,dbeforedc
ondemningdthedPCM,dthedbatterydshoulddbedchargeddanddretested.d Thendthedappropriatedvoltageddropdtestsdofdth
edPCM’sdpowerdanddgrounddcircuitsdshoulddbedperformed.dWhodisdcorrect?
a. TechniciandAdonlyd d d b.dTechniciandBdonly
c.dBothdtechniciansd d d d d.dNeitherdtechnician
ANSWER:d b
POINTS: 1

10. WhichdofdthedfollowingdisdNOTdrequireddindorderdfordandenginedcomputerdtodenterdcloseddloopdoperation?
a. Thedoxygendsensordmustdbedupdtodoperatingd b. Thedengine’sdcoolantdtemperaturedmustdbed
temperature. atdordabovedadspecifieddtemperature.
c.dThedvehicledmustdbedatdordabovedaddesignateddsp d.dAdspecifieddtimedperioddmustdhavedpassedd
eeddasdmeasureddbydthedvehicledspeeddsensor. sincedthedenginedwasdstarted.
ANSWER:d c
POINTS: 1

11. Indadditiondtodprovidingdvoltagedtodthedcomputer’sdinternaldcircuits,dwhatdisdthedpurposedofdthedreferencedv
oltagedregulatordwithindadmoderndPCM?
a. Todprovided5dvoltsdtodthedsensorsdondthedinputd b. Todprovided5dvoltsdtodthedactuatorsdondthedoutputd
sidedofdthedPCM sidedofdthedPCM
c.dTodprovided12dvoltsdtodthedsensorsdondthedinputd d.dTodprovided12dvoltsdtodthedactuatorsdondthed
sidedofdthedPCM outputdsidedofdthedPCM
ANSWER:d a
POINTS: 1

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d d d d d d d d d d
Name: Class: Date:

Chapter 2 d

ComputersdindCars


12. “Closeddloop”disddefineddasdadsystemdoperatingdmode:
a. indwhichdthedcomputerdbecomesdpartdofdadco b. indwhichdthedcomputerdignoresdthedinputd
mmunicationsdloopdwithdotherdcomputers fromdthedoxygendsensor
c.dindwhichdthedcomputerdmonitorsdthedresultsdofditsdownd d.dthatdthedcomputerdentersdonlydwhendthed
control throttledisdclosed
ANSWER:d c
POINTS: 1

13. Whichdgasdisdnaturallydproduceddwithindthedengine’sdcylindersdthroughdcombiningdthedhydrogendatomdofdthed
HCdmoleculedwithdatmosphericdoxygen?
a. CO b.dCO2
c.dNOX d.dH2O
ANSWER:d d
POINTS: 1

14. TechniciandAdsaysdthatdcloseddloopdisdthedmostdefficientdoperatingdmodedanddallowsdthedenginedcomputerdtodco
ntroldthedair-
fueldratiodwithdthedmostdprecision.dTechniciandBdsaysdthatdopendloopdoperationdisduseddtodimprovedperformanceddu
ringdcolddenginedwarm-
updanddisdalsoduseddunderdheavydloaddordduringdwidedopendthrottledoperation.dWhodisdcorrect?
a. TechniciandAdonly b.dTechniciandBdonly
c.dBothdtechnicians d.dNeitherdtechnician
ANSWER:d c
POINTS: 1

15. Whatdisdindicateddifdthedoxygendsensordvoltagedisdcyclingdbackdanddforthdacrossdthedstoichiometricdvalueds
everaldtimesdperdsecond?
a. Thedair- b. Thedair-
fueldratiodisdtoodleandanddthedvoltagedcannotds fueldratiodisdtoodrichdanddthedvoltagedcannotds
tabilize tabilize
c.dThedcomputerdisdproperlydcontrollingdthedair- d.dThedcomputerdisdmalfunctioning
dfueldratio


ANSWER:d c
POINTS: 1

16. Whichdoperatingdcondition(s)dhas/havedthedprogrammeddgoaldofd maintainingdadstoichiometricdair-fueldratio?
a. opendloopdoperationdonly b.dcloseddloopdoperationdonly
c.dbothdcloseddloopdanddopendloopdoperation d.dlimp-indmodedonly
ANSWER:d b
POINTS: 1

17. Whatdisdthedadvantagedofdcontrollingdthedair-fueldratiodtodadstoichiometricdratio?
a. Adstoichiometricdratiodreducesdthedproductiondof b.dAdstoichiometricdratiodhelpsdthedthree-way
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