轮机工程基础（marine engineering foundation）

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1、轮机工程基础（MarineEngineeringFoundation）ThebasicconceptofstaticsAboutthemeaningofforce,thefollowing________iswrong.A.isoneofthebasicpropertiesofobjectsB.istheinteractionbetweenobjectsC.isduetothechangeofstateofmotionD.isduetoachangeintheshapeofanobjectAnswerAAboutthemeaningofforce,thefollowing_______

2、_iswrong.A.aslongasthereareobjectswillinevitablyexiststrongforce,istheintrinsicattributeofobjectB.istheinteractionbetweenobjects,anobjectdoesnotexistinisolationforceC.aslongasthemotionofanobjectchanges,theobjectwillbeforceD.aslongastheshapeoftheobjectischanged,theobjectwillbeforceAnswerATheforce

3、actingonanobjectis________.A.locationvectorB.slipvectorC.rotationvectorBidirectionalD.vectorAnswerAThefollowingistrue________.IfthetwoA.equalforce,thisforceisequaltotwoTheroleofB.inthebodyforcepositionvectorTheroleofC.twointheequivalentforceontherigidbodyconditionis:thesizeoftheforceisequaltothe

4、samedirection,thesamelineofactionD.forceistheslipvectorAnswerCWhentheforcemovesalongthelineofaction,theforceofanypointofthemomentwill________.TheincreaseofA.ThedecreaseofB.C.invariantD.cannotbedeterminedAnswerCTheinteractionbetweencontactobjects,therelativemotionorrelativemotiontrend,whiletherei

5、sfrictiononthecontactsurface,thedirectionoffrictionalongthecontactsurface________.A.inthenormaldirectionB.tangentdirectionC.outsidethenormaldirectionD.AorCAnswerBIntheplane,thetorqueis________.A.vectorB.locationvectorTheamountofC.algebraD.constantAnswerCOntherigidbody,tokeepinthemomentandthesize

6、ofthesameconditions,theroleof________inmobilecouplecoupleinanyplane.A.B.incertainconditionsC.cannotD.cannotbedeterminedAnswerATwoacoupleofequivalent,thearmof________.A..B.rangeC.doesnotnecessarilyequalD.rangeAnswerCThetorquevector________couplesurface.PerpendiculartotheA.B.andthetorqueangleof30D

7、EGParalleltoC.D.andthearmatanangleof30degreesAnswerAThecouplemomentvectoralongthedirectionof________,accordingto________todetermine.A.normal/lefthandedscrewruleB.tangent/lefthandedscrewruleC.normal/right-handruleD.tangent/ri