2021 Engineering Mechanics(Xidian University) 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-05-06到2021-07-26
本篇答案更新状态:已完结

01. Principles of Statics and the Free-Body Diagrams Test of Chapter 1

1、 问题:The constraint at Point C is 
选项：
A:Pin support
B:Roller support
C:Built-in support
D:Lever
答案: 【Pin support】

2、 问题:“axiom of two forces in equilibrium” can be applied to deformable body.
选项：
A:正确
B:错误
答案: 【错误】

3、 问题:The constraint at point B is a Pin support.
选项：
A:正确
B:错误
答案: 【正确】

4、 问题:Which bar is a “two-force body” ?
答案: 【(以下答案任选其一都对)Bars AB and BC;
AB and BC;
Bar AB and Bar BC;
Bar AB, Bar BC;
Bars BC and AB;
BC and AB;
Bar BC and Bar AB;
Bar BC, Bar AB;
AB, BC;
AB BC;
BC AB;
BC, AB】

02. Basic Operations with Force Systems Test of Chapter 2

1、 问题:Consider the coplanar force system shown in the following figure, F1=200N,  F2=300N, F3=100N, and F4=250N. The magnitude of the resultant of the four forces is
选项：
A:171.3 N
B:71.3 N
C:100 N
D:173.2 N
答案: 【171.3 N】

2、 问题:
选项：
A:
B:
C:
D:
答案: 【】

3、 问题:
选项：
A:
B:
C:
D:
答案: 【】

4、 问题:
答案: 【(以下答案任选其一都对)78.93;
79;
78.9】

03. Reductions and Resultants of Force System Test of Chapter 3

1、 问题:The Principal Moment is related to moment center point O
选项：
A:正确
B:错误
答案: 【正确】

2、 问题:A force at a given point can always be replaced by a force at a different point and a couple-vector that is parallel to the force.
选项：
A:正确
B:错误
答案: 【错误】

3、 问题:The resultant force and the principal vector are the same
选项：
A:正确
B:错误
答案: 【错误】

04. Equilibrium of Coplanar Force System Tset of Chapter 4

1、 问题:
选项：
A:
B:
C:
D:
答案: 【】

2、 问题:
选项：
A:
B:
C:
D:
答案: 【】

3、 问题:
答案: 【17.5】

05. Axial tension and compression Test of Chapter 5

1、 问题: Low carbon steel will occur in the yield stage (  )
选项：
A: Elasticity
B: Linear elasticity
C:Plasticity
D: Elasticity and plasticity
答案: 【 Elasticity and plasticity】

2、 问题:The plane assumption in axial tension and compression is applicable to (  ).
选项：
A: Everywhere along the length of the rod
B:Everywhere except the two ends of the rod
C:Everywhere a bit far from the afterburner end of the rod
D: Everywhere along the width of the rod
答案: 【Everywhere a bit far from the afterburner end of the rod】

3、 问题: The relationship between internal force and stress is (  ).
选项：
A: Internal force is greater than stress
B:Internal force is equal to the algebraic sum of stress
C: Internal force is vector and stress is scalar
D: Stress is the concentration of distributed internal force
答案: 【 Stress is the concentration of distributed internal force】

4、 问题:the factors that affect the ultimate stress are (  ).
选项：
A: Load
B: Material properties
C: Section size
D: Working conditions
答案: 【 Material properties ;
 Working conditions】

5、 问题: The factors that affect the working stress of members are ()
选项：
A:Load
B: Material properties
C: Section size
D: Working conditions
答案: 【Load;
 Section size】

6、 问题: the external force causing the axial tension and compression deformation of the rod must be a pair of concentrated forces along the axis of the rod (  ).
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:Only statically indeterminate structures can have assembly stress and temperature stress(  ).
选项：
A:正确
B:错误
答案: 【正确】

8、 问题: In axial tension, the ratio of axial stress to strain is always constant(  ).
选项：
A:正确
B:错误
答案: 【错误】

9、 问题:After the rod is extended, the transverse direction will be shortened, because there is transverse stress in the rod(  ).
选项：
A:正确
B:错误
答案: 【错误】

10、 问题: Internal force refers to the internal force of an object after external force(  ).
选项：
A:正确
B:错误
答案: 【正确】

11、 问题:the greater the axial force is, the easier the bar is to be broken, so the axial force can be used to judge the strength of the bar(  ).
选项：

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