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1、轮机工程基础（Marine Engineering Foundation）The basic concept of staticsAbout the meaning of force, the following _ is wrong.A. is one of the basic properties of objectsB. is the interaction between objectsC. is due to the change of state of motionD. is due to a change in the shape of an objectAnswer AAbou
2、t the meaning of force, the following _ is wrong.A. as long as there are objects will inevitably exist strong force, is the intrinsic attribute of objectB. is the interaction between objects, an object does not exist in isolation forceC. as long as the motion of an object changes, the object will be
3、 forceD. as long as the shape of the object is changed, the object will be forceAnswer AThe force acting on an object is _.A. location vectorB. slip vectorC. rotation vectorBidirectional D. vectorAnswer AThe following is true _.If the two A. equal force, this force is equal to twoThe role of B. in t
4、he body force position vectorThe role of C. two in the equivalent force on the rigid body condition is: the size of the force is equal to the same direction, the same line of actionD. force is the slip vectorAnswer CWhen the force moves along the line of action, the force of any point of the moment
5、will _.The increase of A.The decrease of B.C. invariantD. cannot be determinedAnswer CThe interaction between contact objects, the relative motion or relative motion trend, while there is friction on the contact surface, the direction of friction along the contact surface _.A. in the normal directio
6、nB. tangent directionC. outside the normal directionD.A or CAnswer BIn the plane, the torque is _.A. vectorB. location vectorThe amount of C. algebraD. constantAnswer COn the rigid body, to keep in the moment and the size of the same conditions, the role of _ in mobile couple couple in any plane.A.B
7、. in certain conditionsC. can notD. cannot be determinedAnswer ATwo a couple of equivalent, the arm of _.A.B. rangeC. does not necessarily equalD. rangeAnswer CThe torque vector _ couple surface.Perpendicular to the A.B. and the torque angle of 30 DEGParallel to C.D. and the arm at an angle of 30 de
8、greesAnswer AThe couple moment vector along the direction of _, according to _ to determine.A. normal / left handed screw ruleB. tangent / left handed screw ruleC. normal / right-hand ruleD. tangent / right-hand ruleAnswer CThe torque vector modulus is equal to _.The force couple A.The torque of the
9、 size of B.The two force size C. forceThe size of the arm of D.Answer BOn the rigid body, the torque vector is a _.A. location vectorFree vector B.C. slip vectorD. rotation vectorAnswer BThe role of surface refers to _.The role of A. in line with the plane perpendicular to the anti parallel two forc
10、eThe role of B. in the two line of the plane where the reverse parallel forceThe role of C. in line with the plane parallel to the two parallel reverse forceD.And the steering is perpendicular to the plane of the coupleAnswer BThe following _ is one of the three elements of the couple.The direction
11、of the arm of A.The couple turned to B.The size of the arm of C.D. in the direction of the forceAnswer BAbout the couple saying _ is wrong.A. two a couple on the rigid body, even if the three factors have a different effect, they may have the same (such as the two force couple is parallel to the sur
12、face)B. cannot couple and a force equivalent, because the couple did not forceC. couple of rigid body simply change the action of the rotation, without translation effectEffect of position effect and the couple of the rigid D. couple, couple can not move any role in the planeAnswer DAbout the couple
13、 saying _ is correct.A. two couple on an object, even if the three factors have a different effect, they are the sameB. couple of rigid body has changed the action of the rotation, translation also has the role ofC. could be the equivalent of a force couple andEffect of position effect and the coupl
14、e D. couple of rigid body independent of the couple, which can move freely in the plane of actionAnswer DAbout the couple saying _ is wrong.The effect of A. two on the body, as long as the three elements have a different effect, they are not the sameB. cannot couple and a force equivalent, because the couple did not forceC. couple of rigid body simply change the action of the rotation, without translation effectEffect of position effect and the couple D. couple of rigid body independent of the couple, which can move freely in
