机修钳工试题库（mechanical examination bench）

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1、机修钳工试题库（Mechanicalexaminationbench）MechanicalexaminationbenchFirst,themultiple-choicequestion(eachitemhasonlyoneoptioniscorrect,pleaseinsertitscodeintoparentheses)1.,0.02verniercaliperonthecursor,fiftiethgridlineandrulerbody(A)mmlinealignment.A.49,B.39,C.192.with

2、themethodofpressingleadwirecheckgearbacklash,thewirediameterofthegearbacklashshouldnotexceedfourtimesthegap(B).A.MaxB.minimumC.mediumThemainworkofthe3.fileisreferstotheteeth(A).A.upperandlowersides,B.,twosides,C.,allsurfaces4.,anobjectinspace,withoutanyrestrictio

3、ns,shouldbe(C)degreesoffreedom.A.fourB.,fiveC.,six5.whenthebearingsareassembledbyhotcharging,thebearingswillbeheatedintheoiltankandthetemperatureshallnotexceed(A)A.100degreesCB.150degreesCC.200degreesC6.theparallelismerrorofthegeneralmachinetoolguiderailis(B)A.0.

4、01to0.02B.,0.015to0.02C.,0.02to0.047.hydrostaticbearingoilfilmpressureisbuilton(B)toensurethat.A.rotationspeedB.,feedingpressureC.,loadsize8.gearpumppumpbodyweargenerallyoccursin(B).A.oilpressurechamber,B.oilsuctioncavity,C.endline9.whenmeasuringthestraightnesser

5、roroflongrailinverticalplane,itismoresuitabletoadopt(B)method.A.indirectmeasurementofB.opticalreferenceC.physicalreferenceThe10.curvedrotorcausesaseverevibrationathighspeeds,andtherotorcanbeused(A)tosolvetheproblemofunbalance.A.straighteningB.dynamicbalancingC.hi

6、ghspeeddynamicbalancing11.,comparedwiththevibrationresistance,highspeedmechanicalrotor(C)bearingsarebest.A.B.C.ovalcylindricaltiltingtype12.themaincomponentsofthecontrolcircuitare(A).A.motor,B.indicator,C.fuse13.bearingsbearingbothradialandaxialforcesare(C).A.rad

7、ialbearing,B.thrustbearing,C.radialthrustbearing14.,reasonableadjustmentofbearingclearanceisthekeytoensurethebearinglifeandimprovetheshaft(B).A.rotationspeed,B.,rotationaccuracy,C.surfaceroughness15.,thebasicfactorthatdeterminesthestabilityofplainbearingsisthesha

8、ftinthebearing(B).A.speed,size,B.,eccentricity,size,C.,fitclearance,size16.afterrepair,high-speedandhigh-precisionspindlediametersurfaceroughnessrequirementsof