2024知到答案 Mechanical Engineering Practice 金工实习 完整智慧树网课章节测试答案
绪论 单元测试
1、单选题：
In this course, which part does the knowledge of “injection molding” belong to?
选项：
A:Manufacturing;
B:Industrial Design;
C:CNC Turning
D:3D digital measurement;
答案: 【Manufacturing;】
第一章 单元测试
1、判断题：
The parting plane is the contact surface between the stationary and moving sides of the mold.
选项：
A:对
B:错
答案: 【对】
2、判断题：
During the plastication stage, the polymer melt is forced from the barrel of the molding machine and into the mold.
选项：
A:错
B:对
答案: 【错】
3、判断题：
After the mold cavity is filled with the polymer melt, the packing stage provides additional material into the mold cavity as the molten plastic melt cools and contracts.
选项：
A:错
B:对
答案: 【对】
4、判断题：
An injection mold has many structures to accomplish the functions required by the injection molding process.
选项：
A:对
B:错
答案: 【对】
5、判断题：
An injection mold is constructed of a number of plates, bolted together with socket head cap screws.
选项：
A:错
B:对
答案: 【对】
第二章 单元测试
1、判断题：
Whether a part is qualified depends first on whether it has reached the basic size.Just equal to the basic size must be qualified products.（ ）
选项：
A:错
B:对
答案: 【错】
2、判断题：
Dimensional deviation is the difference of a certain size minus its basic size, so the size deviation can be positive, negative and zero.（ ）
选项：
A:对
B:错
答案: 【对】
3、判断题：
Position tolerance can be divided into three categories: directional tolerance, positioning tolerance and runout tolerance.（）
选项：
A:错
B:对
答案: 【对】
4、判断题：
The surface roughness of parts is directly related to the processing method.（）
选项：
A:对
B:错
答案: 【对】
5、判断题：
Surface roughness belongs to micro geometric error.（）
选项：
A:错
B:对
答案: 【对】
6、判断题：
The surface roughness symbol represents the machined surface obtained by material removal.（）
选项：
A:错
B:对
答案: 【错】
7、判断题：
When measuring workpiece with vernier caliper, the measurement error will increase if the force is too large or too small.（）
选项：
A:错
B:对
答案: 【对】
8、判断题：
The outer diameter micrometer is a measuring tool for measuring aperture and groove depth.（）
选项：
A:错
B:对
答案: 【错】
9、判断题：
The vernier universal angle ruler can measure any angle from 0 to 360 degrees.（）
选项：
A:错
B:对
答案: 【错】
10、判断题：
Relative measurement method is used when measuring length with percentile meter.（）
选项：
A:错
B:对
答案: 【对】