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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 t
15、he 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 the plane of actionAnswer AOn a point of the moment (torque) is a me
16、asure of the force of the physical objects of _.Since the effect of the A. translational start pointThe effect of rotation around the point B.C. in the point of the deformation effectD. in the vibration effect of the pointAnswer BTwo rigid force balance _ is the two force equivalent, reverse, collin
17、ear.A. sufficient conditionB. necessary conditionC.A or BD.A and BAnswer DThe two component refers to _.A. only by the two component forceComponent B. only by two parallel forceComponent C. only by two perpendicular force.D. only by two forces in a balance memberAnswer DThe translation theorem that
18、role in rigid body force can be _, but we add a couple.A. is free to move to any point on a rigid bodyB. parallel move to any point on a rigid bodyC. move to a rigid body at the centerD. vertical move to any point on a rigid bodyAnswer BIf the two force of equal size, the size of the two _ force pro
19、jections to the same axis.A. must be equalB. does not necessarily equalC. must not equalD. algebra and zeroAnswer BForce projection in the axis is _, component force in the axis direction is _.A. Algebra / Algebraic quantityB. vector / scalar quantityC. scalar / vectorD. vector / vectorAnswer CThe s
20、ize of _ force force projection in two axes perpendicular to each other along the two axes of the size.A. greater thanB. is less thanC. equalsD. is not equal toThe answer, CComponent force on the orthogonal axes projection size and force along the two axis of the size of the _; component force in tw
21、o axis vertical projection of the size and force along the two axis of the size of the _.A. equal / equalB. equal / unequalC. is not equal / equalD. is not equal / unequalThe answer, BLaw of action and reaction _.A. applies only to rigid bodiesB. applies to rigid bodies and deformable bodiesC. appli
22、es only to deformable bodiesD. does not apply to rigid bodies or deformable bodiesThe answer, BGenerally speaking, the object can be divided into two categories, namely _.A. initiative and powerB. gravity and inertial forcesC. active force and constrained reaction forceD. binding and binding reactio
23、nThe answer, CThe rope of the constraint force direction for _.A. goes along the center line of the rope and points to the objectB. follows the vertical line of the center line of the ropeC. deviates from the center line of the ropeD. arbitrary directionThe answer, CIn general, the rope constraint f
24、orce available to _ said.A. a force along the centerline of a ropeA couple of B.C. the force in the direction of the center line of a vertical ropeD.A+BThe answer, AWhen the belt or chain around the wheel, belt or chain constraint force for _.A. travels along the tangent of the wheel and points to t
25、he wheelB. follows the normal direction of the wheel flange and points to the wheel shaftC. deviates from the wheel along the tangent of the wheelD. deviates from the wheel along the normal direction of the wheel flangeThe answer, CIn general, the belt constraint force available to _ said.A. a force
26、 along the centerline of the beltA couple of B.A C. along the direction of the center line of the belt force and a coupleD. a pair of forces perpendicular to each otherThe answer, ASmooth contact constraint objects along the contact surface _ movement.A. normal directionB. tangent directionC. extern
27、al normal directionD.B+CThe answer, AIn general, smooth constraint constraint force can be used to represent _.A. a force along the plane of the smooth faceA couple of B.C. a force along the normal direction of the smooth faceD. a pair of mutually perpendicular force and a coupleThe answer, CIn gene
28、ral, smooth constraint constraint force can be used to represent _.A. a force along the normal direction of the smooth faceB. a force along the plane of the smooth faceC. a force along the outer normal direction of the smooth faceD. a pair of forces perpendicular to each otherThe answer, CIn general
29、, the fixed hinge constraint constraint force can be used to represent _.A. a pair of forces perpendicular to each otherA couple of B.C. a pair of mutually perpendicular force and a coupleD. a pair of mutually perpendicular force and two coupleThe answer, AIn general, the sliding hinge constraint an
30、d constraint forces can be said to _.A. a force along the tangent of the supporting surfaceA couple of B.C. a force along the normal direction of the support surfaceD. a pair of mutually perpendicular force and a coupleThe answer, CThe following _ for sliding hinge constraints.A. to limit movement a
31、long the support surfaces, limit bearing surface along the tangential direction, but not limited to rotate around the bearing pinB. to limit movement along the bearing surfaces, does not limit the bearing surface along the tangential direction, is not limited to rotate around the bearing pinC. to li
32、mit movement along the support surfaces, limit bearing surface along the tangential direction, rotate around the bearing pin also limitsD. is not restricted to movement along the bearing surface, does not limit the bearing surface along the tangential direction, is not limited to rotate around the b
33、earing pinAnswer BIf the two components with the cylindrical pin connection becomes smooth, _.A. fixed hinge constraintB. sliding hinge constraintC. middle hinge constraintD. fixed constraintAnswer CThe middle hinge constraint _.A. limited two components connected with the vertical movementThe level
34、 of motion B. only limit two component which is connected with theC. only limit relative translation of the connecting between the two components, without limiting the relative rotation between two membersD. is the two member limit relative translation of the connecting between the limited relative
35、rotation between two membersAnswer C_ is characterized by limited objects can not move, can not rotate.A. fixed hinge constraintB. sliding hinge constraintC. smooth contact surface constraintD. fixed constraintAnswer DIn general, the fixed end forces available to _ said.A. a pair of mutually perpend
36、icular forceA couple of B.C. a pair of mutually perpendicular force and a coupleD. a pair of mutually perpendicular force and two coupleAnswer CFixed in the plane is completely restricted to three kinds of moving objects may exist, namely _.The rotation and translational motion A. two vertical direc
37、tionThe rotation and translational motion B. two parallel directionC. two vertical translational motion and rotationD. three direction translational motion and rotationAnswer CIn general, fixed by _ said the restriction to a moving object, with _ said of rod rotation restriction.A. a pair of parallel constraint force / a constraint coupleB. is a constraint force / a pair of parallel constraint coupleC. a pair of mutually perpendicular constraint force / a constraint coupleD. is a constraint force / a pair of mutually vertical constraint coupleAnswer C