机修钳工理论知识试卷（mechanical fitter; theoretical knowledge; test paper）

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1、机修钳工理论知识试卷（Mechanicalfitter;theoreticalknowledge;testpaper）-----------------------1页-----------------------称机修钳工理论知识试卷名位线注意事项单1、考试时间：90分钟。2、请首先按要求在试卷的标封处填写您的姓名、准考证号和所在单位的名称。此3、请仔细阅读各种题目的回答要求，在规定的位置填写您的答案。4、不要在试卷上乱写乱画，不要在标封区填写无关的内容。过一二三四五六总分统分人得分名超姓得分评分

2、人准一、填空题（第1～20题。请将正确答案填入题内空白处。每空0.5分，共20分。）1。游标卡尺由刀口形的内、外量爪和深度尺组成。不2。工作温度低时，宜选用粘度低的润滑油；工作温度高时，宜选用粘度高的润滑油。3。机械设备拆卸时的顺序与装配顺序相反，一般按”由外至内，自上而下先部件再零件”。号题证4。带轮孔与轴的配合通常采用H7/K6过渡配合。考5。机械零件损坏可分为自然磨损和事故磨损两种方式。accurateAnswer6.hydraulicsystemcontrolcomponentshavepr

3、essurecontrolvalve,directionalcontrolvalveandflowcontrolvalve.7.measurementerrorscanbeclassifiedintosystematicerror,randomerrorandgrosserror.8.themachinerythatdrawsandtransportsliquidiscalledapump.living9.aclosedsizefigureformedintheprocessofmachiningi

4、scalledaprocessdimensionchaindiagram.10.railaccordingtothefrictionstatecanbedividedintoslidingrail,rollingguideandstaticpressurerail.Therearetwowaystorealizethepreloadofthe11.rollingbearings,i.e.radialpreloadandaxialpreloadDistrict12.,nomatterwhichkind

5、ofhydraulicpump,isinaccordancewiththeprincipleofchangeinthevolumeofsealingwork.Thebrakingmethodofground13.motorhaspowerandmechanicalbrake.14.,inaccordancewithdifferentusesandforceconditions,theshaftisoftendividedintospindle,transmissionshaftandshaft.Pa

6、geand2-----------------------15.fusesareusedtoprotectthepowersupplytoensurethatitdoesnotoperateinshortcircuit;thermalrelaysareusedtoprotecttheasynchronouselectricalcircuitMotivationtoensurethatitdoesnotoperateunderoverload.16.pressurecontrolvalveaccord

7、ingtoitsperformanceanduseofdifferentsubreliefvalve,pressurereducingvalve,sequencevalveandpressurerelaySuchdevice.17.whenliftingequipmentwithslings,theanglebetweentheslingandthehorizontalplaneshallnotbelessthan30degrees.18.tomeasurethevibrationinthevert

8、icaldirectionofthebearing,thecenterofthebearingwidthshouldbechosenasthemeasuringpoint.19.gearpumptoworkbalance,andcancontinuetosupplyoil,itisrequiredtogearmeshingcoefficientofoverlapisgreaterthan1.20.centrifugalpumptest,theflowandliftup