大学MOOC Theory of Machine and Mechanisms(Xidian University)1458081166 最新慕课完整章节测试答案
Chapter 1 Introduction
文章目录
- Chapter 1 Introduction
- Chapter 2 Structural Analysis of Planar Mechanisms
- Chapter 3 Kinematic Analysis of Planar Mechanisms
- Chapter 4 Planar Linkage Mechanisms
- Chapter 5 Cam Mechanisms
- Chapter 6 Gear Mechanisms
- Chapter 7 Gear Trains
- Chapter 8 Other Mechanisms in Common Use
- Chapter 9 Dynamic Analysis of Planar Mechanisms
Chapter 1 Unit Test
1、判断题：
The term “synthesis” differs from “design” which is the process of prescribing the size, shape, material compositions, arrangements of parts, calculations of strength, methods of production, etc.
选项：
A: 正确
B: 错误
答案: 【 正确】
2、判断题：
Mechanisms used in machines which have different functions and profiles may be the same.
选项：
A: 正确
B: 错误
答案: 【 正确】
3、判断题：
The radii of the holes and the cross-section areas of the links are the kinematics dimensions.
选项：
A: 正确
B: 错误
答案: 【 错误】
4、判断题：
Machine is a mechanical system that can transmit or transform energy, materials or information.
选项：
A: 正确
B: 错误
答案: 【 正确】
5、判断题：
Almost all machines contain only one basic mechanism.
选项：
A: 正确
B: 错误
答案: 【 错误】
Chapter 2 Structural Analysis of Planar Mechanisms
Chapter 2 Unit Test
1、单选题：
In the following choices, which one is a planar higher pair?
选项：
A: 
B: 
C: 
D: 
答案: 【 】
2、单选题：
In the following single-cylinder four-stroke internal combustion engine, which part is an output link?
选项：
A: 2
B: 3
C: 4
D: 5
答案: 【 4】
3、单选题：
In the following mechanisms, which one has not redundant DOF.
选项：
A: 
B: 
C: 
D: 
答案: 【 】
4、单选题：
In the following mechanism, the DOF of the mechanism is .
选项：
A: 0
B: 1
C: 2
D: 3
答案: 【 2】
5、单选题：
In the following mechanisms, whose DOF differ from others.
选项：
A: 
B: 
C: 
D: 
答案: 【 】
6、单选题：
If the compound pair contains K links, the number of revolute joints is .
选项：
A: K-2
B: K-1
C: K
D: K+1
答案: 【 K-1】
7、单选题：
In the following mechanism, it has redundant constraints.
选项：
A: 0
B: 1
C: 2
D: 3
答案: 【 2】
8、单选题：
In the following mechanism, in order to have a determined motion, the mechanism needs to have driving link(s).
选项：
A: 1
B: 2
C: 3
D: 4
答案: 【 1】
9、单选题：
In the following choices, which one cannot be deleted before the calculation of the DOF of a mechanism?
选项：
A: compound pairs
B: passive DOF
C: redundant constraints
D: all of the above
答案: 【 compound pairs】
10、单选题：
In the following mechanism, the mechanism has redundant constraint(s) and DOF.
选项：
A: 2，3
B: 2，1
C: 0，3
D: 0，1
答案: 【 0，3】
Chapter 3 Kinematic Analysis of Planar Mechanisms
Chapter 3 Unit Test
1、单选题：
How many instant centers in the mechanism below?
选项：
A: 5
B: 6
C: 7
D: 8
答案: 【 6】
2、单选题：
How many instant centers in the mechanism below?
选项：
A: 3
B: 4
C: 5
D: 6
答案: 【 3】
3、单选题：
The cam mechanism below has the dimensions: R=50mm, lOA=20mm,lAC=80mm, j1=90 degree. Cam 1 rotates at a constant angular velocity of w1 = 10 rad/s. counterclockwise. P12 is an instant center. The angular velocity w2 of follower 2 is equal to:
选项：
A: 
B: 
C: 
D: 
答案: 【 】
4、判断题：
The velocity vector polygon and acceleration vector polygon of the link are similar to the shape of the link.
选项：
A: 正确
B: 错误
答案: 【 正确】
5、判断题：
The method of instant center can be applied to calculate velocity and acceleration.