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    大家一起来做可靠性考试试卷!!

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  • Lv.6
    靓号:9999

    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

    [quote]
    [size=5][color=blue]其余几个试题:
    [url=https://www.kekaoxing.com/club/space-uid-160.html]fanweipin[/url][url=https://www.kekaoxing.com/club/attachment.php?aid=418]可靠度工程師(CertifiedReliabilityEngineer,CRE)考試辦法.pdf[/url](41KB)(下载后,将PDF改为DOC后缀)[url=https://www.kekaoxing.com/club/viewthread.php?tid=1165&page=3&fromuid=5#pid6431]原文地址>>[/url]

    [url=https://www.kekaoxing.com/my//?uid/721]robert928[/url][attach]475[/attach]
    美国可靠性工程师试题集.rar[url=https://www.kekaoxing.com//mag/reliability-mag/cre_sample_examCN.pdf]美国可靠性工程师认证考试试题翻译[/url](中文版)
    [/quote]

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    Lv.6
    挑两个简单的做一下::lol:) 第三题:设计阶段,首要的关注安全方面应该是终端用户的应用!(D)End-userapplications 第十题:0.9*[1-(1-0.7*0.8)*(1-0.7*0.8)]=0.72576只有选B了
    回复
    Lv.4
    强,请提供完整的文档下载,同时请admin用html出个在线考试。
    回复
    Lv.6
    靓号:9999
    :lol我也选两个来做一下: 第23题:答案选(A) 计算公式已知MTBF求可靠度 MTBFTλR(t)F(t) 50002002000.9607894390.039210561 6000200166.670.96721610.0327839 4500200222.220.9565287390.043471261 20002005000.9048374180.095162582 串联可靠度为:0.804304156 并联可靠度为:0.999994682 大概介绍一下里面计算的公式: λ=1/MTBFR(t)=EXP((-1/MTBF)*T)F(t)=1-R(t) 串联可靠度=4个R(t)相乘 第24题:选(B) 计算方法: [url=http://www.kekaoxing.com/club/thread-667-1-1.html]详细参考MIL-HDBK-338BP575[/url][url=http://www.kekaoxing.com/club/thread-80-1-3.html][color=#0000ff]定时截尾试验方案[/color][/url] 8.3.2.5.2ConfidenceLimits-ExponentialDistribution 已知参数:n=100 t*=500 故障时间是:1103000 置信水平:0.95 解:r=2 a=0.05 2r=4 T=52110 MTBF=8276.954921 MTBFTλR(t)F(t) 8276600120.83131950.930066870.06993313 R(t)=0.93答案B最接近 很久很久以前做了个EXCEL表。把可靠性的一些相关计算输入了进去,找个时间上传上来给大家看看:lol 楼下计算做题目,参加考试。。做的好有赠送积分,积分可是有用的哦,可以用来下载好的标准!! [[i]本帖最后由cliffcrag于2007-6-114:18编辑[/i]]
    回复
    Lv.2
    不错,做完这些题目,可以将可靠性的知识面归纳总结一下了。
    回复
    第一次看到可靠性测试还有试题。值得学习。
    回复
    Lv.1
    我也來試看看
    回复
    :'(第一题我觉得选B,A.C.D都不能改变产品的固有可靠性
    回复
    第二题B
    回复
    5A
    回复
    Lv.3
    1b
    回复

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