2015年电大水利水电工程与管理（专科）《水轮机、水泵及辅助设备》复习试题及参考答案

试卷代号2051座位号福建广播电视大学20122013学年度第二学期期末考试水利水电工程与管理（专科）水轮机、水泵及辅助设备试题（闭卷）2013年7月题号一二三四五总分题分注意请考生正确填写试卷右上角的座位号。得分评卷人一、判断题（每小题2分，共20分。）1水轮机与发电机是水电站的心脏。（）2可逆式水轮机既是水泵，又是水轮机。（）3贯流式水轮机用于高水头电站。（）4喷嘴是冲击式水轮机的必要部件。（）5转轮中水流的轴面速度就是轴向速度。（）6轮机尺寸越大，其效率越低。（）7高水头电站的水轮机一般用金属蜗壳。（）8尾水管的损失越大，其恢复系数越小。（）9水轮机导叶开度越大，其空化系数越大。（）10转桨式水轮机模型综合特性曲线上都不绘制出力限制线。（）得分评卷人二、单项选择题（每小题2分，共20分）1叶片角度可以调整的水轮机有（）。水轮机、水泵及辅助设备试题第1页（共4页）A轴流式斜流式与贯流式B混流式2实际水电站中运行的水轮机其转速（）。A保持不变B是随负荷变化的3当水轮机运行在大流量时，出口VU2与圆周速度方向（）。A一致B相反4比转速越高的水轮机，其空化系数（）。A越大B越小5计算水轮机的转速直径D1时应用（）。A额定水头HRB平均水头HA6混流式水轮机的效率修正采用（）。A等值修正法B非等值修正法7冲击式水轮机的流量与转速（）。A有关B无关8当需要减少蜗壳的平面尺寸时蜗壳包角应选（）。A大一些B小一些9水轮机的流量调节的实质是（）。A改变导叶出口水流角B改变导叶出口面积10比转速高的水轮机，其尾水管深度H应是（）。A大一些B小一些得分评卷人三、简答题（每小题10分，共20分。）1小型反击式水轮机有几种引水型式水轮机、水泵及辅助设备试题第2页（共4页）2定桨式水轮机与转桨式水轮机有什么区别3高比转速水轮机用于高水头水电站有什么问题水轮机、水泵及辅助设备试题第3页（共4页）得分评卷人四、计算题（共20分。）1某水电站上游水位上10M，下游水位下950M，水轮机的单位流量3Q20M/S，引水管损头H，假定水轮机的效率，发电机的效率G96，试求该水轮机的出力P与发电机的出力GP。注水轮机的工作水头GHH，G为毛水头。2某水电站装置一台小机组，水轮机型号为HL240LJ140，水轮机出力为3200KW，同时装一台大机组，水轮机型号为HL240LJ280。若两水轮机工况相似，求大机的水轮机出力是多少注可用一次近似式计算。水轮机、水泵及辅助设备试题第4页（共4页）试卷代号2051座位号福建广播电视大学20122013学年度第二学期期末考试水利水电工程与管理（专科）水轮机、水泵及辅助设备试题（闭卷）2013年7月题号一二三四五总分题分注意请考生正确填写试卷右上角的座位号。得分评卷人一、判断题（每小题2分，共20分。）12345678910得分评卷人二、单项选择题（每小题2分，共20分）1A2A3B4A5A6A7A8A9A10A得分评卷人三、简答题（每小题10分，共30分。）1答小型反击式水轮机除了用蜗壳引水外，还常用明槽引水，罐式引水，小型流式水轮机还用竖井式和轴伸式装置型式。2答定桨式水轮机的叶片不能改变角度，工况变化时效率变化大，高效率区窄，转桨式水轮机叶片可以改变角度，工况变化时效率下降慢，高效率区宽广。水轮机、水泵及辅助设备答案3答高比转速水轮机一般叶片数目少，过流量大，因此，转轮强度低，空化系数大，用于高水头时，转轮强度不够，容易发生空化。得分评卷人四、计算题（每小题15分，共30分。）1解水轮机的工作水头为G上下HHH10954（M）P981Q24862（KW）G65093（K）2解根据水轮机的相似率，在同样水头条件下，水轮机的出力与转轮直径的平方成正比，故大机组的出力为2P320（8/14）0（KW）水轮机、水泵及辅助设备答案请您删除一下内容，O_O谢谢2015年中央电大期末复习考试小抄大全，电大期末考试必备小抄，电大考试必过小抄AFTEREARNINGHISSPURSINTHEKITCHENSOFTHEWESTIN,THESHERATON,SENSONTHEBUND,ANDASPRINKLINGOFOTHERTOPNOTCHVENUES,SIMPSONLUFINALLYGOTTHECHANCETOBECOMEHISOWNBOSSINNOVEMBER2010SORTOFTHESHANGHAIBORNCHEFMIGHTNOTACTUALLYOWNCALIFORNIAPIZZAKITCHENCPKBUTHEISINSOLECHARGEOFBOTHKITCHENANDFRONTOFHOUSEATTHISSINANMANSIONSSTALWART“ITSCERTAINLYARESPONSIBILITYTOBETHEHEADCHEF,ANDTHENTOHAVETOMANAGETHERESTOFTHERESTAURANTASWELL,“THE31YEAROLDTELLSENJOYSHANGHAI“INHOTELS,FOREXAMPLE,THESEJOBSARESTRICTLYDEMARCATED,SOITSAGREATOPPORTUNITYTOLEARNHOWABUSINESSOPERATESACROSSTHEBOARD“ITWASATASKTHATMANAGEMENTBACKINSUNNYCALIFORNIAEVIDENTLYFELTHEWASREADYFOR,ANDAVOTEOFCONFIDENCEFROMACOMPANYTHAT,TODATE,HASOPENED250OUTLETSIN11COUNTRIESANDFORADDEDPRESSURE,THESHANGHAIBRANCHWASALSOCPKSCHINADEBUT“FORSUREITWASABIGSTEP,ANDUNLIKEALLTHEIROTHERASIAOPERATIONSTHATAREFRANCHISES,THEYDECIDEDTOMANAGEITDIRECTLYTOBEGINWITH,“SAYSSIMPSONTWOYEARSAGOAPRIVATEFRANCHISEETOOKOVERTHELEASE,BUTTHELINKSTOCPKHEADQUARTERSARESTILLSTRONG,WITHAMAINLANDBASEDBRANDAMBASSADORONHANDTOENSURETHEBUSINESSADHERESTOITSETHOSOFCREATING“INNOVATIVE,HEARTHBAKEDPIZZAS“,ASLICEOFPRBLURBTHATSIMPSONINSISTSLIVESUPTOTHEHYPE“THEYAREVERYINNOVATIVE,“HESAYS“THEPROBLEMWITHMOSTFASTFOODPLACESISTHATTHEYUSETHESAMESAUCEONEVERYPIZZAANDJUSTCHANGETHETOPPINGSEVERYONEOFOUR16PIZZASAUCESISAUNIQUERECIPETHATHASBEENFORMULATEDTOCOMPLEMENTTHETOPPINGSPERFECTLY“THELARGELYLOCALCUSTOMERBASEEVIDENTLYAGREESANDONSATURDAYANDSUNDAY,ATLEAST,THEPLACEISTEEMINGTHEKIDSEATFORFREEPOLICYATWEEKENDSISUNDOUBTEDLYABIGDRAW,ASWELLASISTHESPACIOUSSECONDFLOORLAYOUTOVERLOOKEDBYACANOPYOFGREENFROMFUXINGPARKOVERTHEROADTHECOMPANYISALSOFOCUSINGONINCREASINGBRANDRECOGNITIONANDINRECENTYEARSHASTAKENPARTINOUTSIDEEVENTSSUCHASTHEREGULARCALIFORNIAWEEKSTILL,THESTAAREHONESTENOUGHTOADMITTHATBUSINESSCOULDBEBETTERASGOOD,INFACT,ASINCPKSSECONDOUTLETINTHEPOPULARKERRYPARKSIDESHOPPINGMALLINPUDONG“SINANMANSIONSHASREALLYSTRUGGLEDTOGETTHENUMBEROFVISITORSTHATWEREENVISAGEDWHENITFIRSTOPENED,ANDITHASNTBEENEASYFORANYOFTHETENANTSHERE,“ADDSSIMPSON“WEREPLANNINGATHIRDOUTLETINTHECITYIN2015,ANDWEWILLPROBABLYCHOOSEASHOPPINGMALLAGAINBECAUSEOFTHEBETTERFOOTTRAFFIC“THETEAROOMSONCEFREQUENTEDBYCOCOCHANELANDMARCELPROUSTAREUPPINGSTICKSANDCOMINGTOSHANGHAI,XUJUNQIANVISITSTHEPARISIANOUTPOSTWITHSWEETTREATSONETHINGTHECENTURYOLDPARISIANTEAROOMANGELINAHASSHOWNISTHATLEGENDARYFASHIONDESIGNERCOCOCHANELNOTONLYHADSTYLEANDGLAMORBUTALSOBOASTEDGREATTASTEINFOOD,PASTRIESINPARTICULARONEOFTHEMOSTPOPULARTEAROOMSINPARIS,ANGELINAISFAMOUSFORHAVINGONCEBEENFREQUENTEDBYCELEBRITIESSUCHASCHANELANDWRITERMARCELPROUSTNOWANGELINAHASPACKEDUPITSFRENCHAMBIENCE,EFFICIENTSERVICE,ANDBEAUTIFUL,COMFORTINGDESSERTSANDFLOWNTHEMTOSHANGHAIATTHEFLAGSHIPDINEINANDTAKEOUTSPACEINSHANGHAI,EVERYTHINGMIMICSTHEORIGINALTEAROOMDESIGNEDFROMTHEBEGINNINGOFTHE20THCENTURY,INPARIS,THEHEIGHTOF“BELLEEPOQUE“THEPAINTINGSONTHEWALL,FOREXAMPLE,AREEXACTLYTHESAMEASTHEONETHATDEPICTSTHELANDSCAPEOFSOUTHERNFRANCE,THEHOMETOWNOFTHEOWNERANDTHESMALLTABLESAREINTENTIONALIMITATIONSOFTHEONESTHATCOCOCHANELONCESATATEVERYAFTERNOONFORHOTCHOCOLATETHEFAMOUSHOTCHOCOLATE,KNOWNASLAFRICAIN,ISALUXURIOUSMIXTUREOFFOURTYPESOFCOCOABEANSIMPORTEDFROMAFRICA,BLENDEDINPARISANDTHENSHIPPEDTOSHANGHAIITSSINFULLYSWEET,RICHANDTHICKASIFPUTTINGABAROFMELTINGCHOCOLATEDIRECTLYONTHETONGUEANDTHEFRESHWHIPPEDCREAMONTHESIDEMAKESALIGHT,BUTEQUALLYGRATIFYINGCONTRASTITISALSOSOLDINGLASSBOTTLESASTAKEAWAYTHESIGN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