ASQ的一个关于可靠性考试的几个题目：
1.Whichofthefollowingmethodswillmostimprovethereliabilityofaproduct?
(A)Reducingconfidencelevels
(B)Reducingvariation
(C)Increasingsamplesize
(D)Increasingtesttime
2.Whichofthefollowingmethodscanbeusedtoquantitativelyidentifyitemsthatarerisk-critical?
(A)Designreview
(B)Fault-treeanalysis
(C)Concurrentengineering
(D)Humanreliabilityanalysis
3.Atthedesignstageofaproduct,thefirstsafetyfocusshouldbeonwhichofthefollowing?
(A)Regulatoryrequirements
(B)Productiontools
(C)Controlsandequipment
(D)End-userapplications
4.Whichofthefollowingstatementsistrueaboutresponsesurfacemethods?
(A)Theycaneliminateday-to-dayvariationsinamanufacturingenvironment.
(B)Theyaremoreefficientthantwo-levelfactorialdesigntechniques.
(C)Theydonotrequiretechnicalconsiderationstoimplementthemethod.
(D)Theydeterminehowanoutputisaffectedbyasetofvariablesoveraspecifiedregion.
5.Whichofthefollowingassumptionsistrueaboutdegradation?
(A)Itisinherentandirreversible.
(B)Itisinherentandreversible.
(C)Itisunacceptableandirreversible.
(D)Itisunacceptableandreversible.
6.Aparts-countreliabilitypredictioniscalculatedbysummingonlythe
(A)partsfailurerates
(B)numberofpartsinthesystem
(C)variancesofthepartfailurerates
(D)partsfailurerateswithapplicationstress
7.Aparthasaconstanthazardrate.Ifpreventivemaintenanceisused,thepart’sfailureprobabilitywillbeaffectedinwhichofthefollowingways?
(A)Itwillincrease.
(B)Itwilldecreasetoafixedvaluegreaterthanzero.
(C)Itwilldecreasetozero.
(D)Itwillremainthesame.
8.Theuseofexperimentaldesigntechniquesearlyintheprocessdevelopmentstagegenerallyresultsin
(A)increasedpersonnelandproductcosts
(B)increasedproductdevelopmenttime
(C)decreasedvariabilityaroundtargetrequirements
(D)decreasedstart-upprocessyields
9.Aqualificationtestisplannedtoestablishwhetheraunitmeetsrequiredminimummeantimebetweenfailures(MTBF).WhichofthefollowingtoolscanbeusedtoestimatethechancethattheunitwillpassthetestevenifitstrueMTBFisbelowtherequiredlevel?
(A)Operatingcharacteristiccurve
(B)Blockdiagram
(C)Faulttree
(D)Transitionstatematrix
10.Thereliabilityblockdiagramofasystemisshowninthefollowingfigurewithcomponentreliabilitynotedineachblock.
–.70—-.80—
—.90–
——
—.70—–.80–
即为（07与0.8串,两个再相并,再与0.9相串联)可靠性方框图RBD的一些知识
Whatisthereliabilityofthesystem?
(A)0.670
(B)0.726
(C)0.804
(D)0.820
Questions11-13refertothefollowinginformation.
Areliabilityengineerneedstouseanacceleratedtestplantoselectanewmaterial.Thefailuremodesareknowntobetemperature-related.
11.Whichofthefollowingstress-relatedcharacteristicsshouldbeconsideredbythereliabilityengineerduringthematerialselectionstage?
(A)Activationenergy
(B)Flexuralenergy
(C)Tensilestrength
(D)Compressionstrength
12.Whichofthefollowingtesttechniqueswouldallowthereliabilityengineertoevaluatethematerialquickly?
(A)Ambienttemperaturetest
(B)Step-stresstest
(C)Fullsystemtest
(D)Durabilitytest
13.Whichofthefollowingapproachesshouldbeusedforafieldvalidationtestofthenewmaterial?
(A)Implementthematerialchangeandmonitorfieldperformance.
(B)Fieldtestasampleofonlythenewmaterialinthesystem.
(C)Fieldtestsamplesofbotholdandnewmaterialinthesystem.
(D)Runlabtestsontwosystems.
14.Whichofthefollowingstatementsbestdescribesthesetofallvaluesofarandomvariable?
(A)Itisfinite.
(B)Itisaninterval.
(C)Itcanbediscreteorcontinuous.
(D)Itcanbetrackedbyusingcontrolchartsorscatterplots.
15.Whichofthefollowingisthebestdescriptionofrandomization?
(A)Atechniqueusedtoincreasetheprecisionofanexperiment
(B)Ameansofassuringrepresentativesampling
(C)Therepetitionofanobservationormeasurement
(D)Therelationshipbetweentwoormorevariables
16.Thehazardratefunctionforadeviceisgivenby
0.001ift<=10hours
and0.010ift>10hours
Whatisthereliabilityofthisdeviceat12hours?
(A)0.970
(B)0.980
(C)0.988
(D)0.990
17.Faultisolationisbestfacilitatedbyusing
(A)troublereports,correctiveactionreports,andinspectiondata
(B)interchangeability,redundancy,andcorrectivemaintenance
(C)preventivemaintenance,built-intestequipment,anddesignsimplification
(D)periodicconditioninspectionsandcorrectionofdetecteddeterioration
18.Tobemostcost-effective,acorrectiveactionshouldbeimplementedbetweenwhichofthefollowingevents?
AfterBefore
(A)InitialbuildFinalqualificationtest
(B)FinalqualificationtestInitialproduction
(C)InitialproductionFieldrelease
(D)FieldreleaseFieldupgrades
19.Inthemodely=12.1×1+5.3×2+ε,thex1followsaWeibulldistributionwithashapeparameterof3.5anda
characteristiclifeof20;x2followsalognormaldistributionwithameanof16andastandarddeviation(σ)of2.5;andεisarandomvariablewithameanof0andaσof1.Inthissituation,whichofthefollowingmethodswouldbebesttoevaluatethedistributionofy?
(A)Regressionanalysis
(B)MonteCarlosimulation
(C)Analysisofvariance
(D)Numericalintegral
20.Forlargepopulations,thesamplesizefortestingahypothesisdependsonallofthefollowingEXCEPTthe
(A)decisionrisksrequired(alphaandbeta)
(B)populationsize
(C)sizeofthesmallestdifferenceofinterest
(D)variationincharacteristicbeingmeasured
21.Acertainelectroniccomponenthasaconstantfailurerateof4*10e-7/hour.Asystemrequirestheuseof64unitsof
thiscomponent,andallofthecomponentsmustfunctionforthesystemtowork.Whatisthesystemfailurerate?
(A)2.56*10-5/hour
(B)3.91*10e-5/hour
(C)2.56*10e4hours
(D)3.91*10e4hours
22.Whentheorderofitemsisnotimportant,whichofthefollowingisthemethodtousetodeterminethenumberofsetsandsubsetsofitems?
(A)Combination
(B)Permutation
(C)Factorization
(D)Simulation
23.Asystemhasfourcomponentsinserieswithmeantimebetweenfailures(MTBF)of5,000,6,000,4,500and2,000
hours,respectively.Whatisthe200-hoursystemreliability?
(A)0.804
(B)0.832
(C)0.898
(D)0.989
24.Onehundredunitsaresubjectedtoareliabilitytestwithduration500clockhours.Duringthetest,2failuresoccur,atT1=110hoursandatT2=300hours.Thefailedunitsarenotreplaced.Onthebasisofthissample,theone-sided95%lowerconfidencelimitofreliabilityoftheseunitsforamissionof600hoursis
(A)0.858
(B)0.926
(C)0.976
(D)0.988
25.Afaircoinistossed10times.Whataretheexpectedmeanandvarianceofthenumberofheads?
MeanVariance
(A)0.50.025
(B)5.02.500
(C)5.05.000
(D)10.05.000
26–75见附件:cre_sample_exam3.rar
[attach]127[/attach]
全文共有75个题目，大家都来做一做，做出来的话，请写一写你做哪题的详细过程。
我们一起来，检查一下，看自己对可靠性到底有多了解！！！:lol:lol
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