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Mechanical Engineering Practice 金工实习 2024智慧树满分答案
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绪论 单元测试
1、单选题:
In this course, which part does the knowledge of “injection molding” belong to?
A:Industrial Design;
B:Manufacturing;
C:3D digital measurement;
D:CNC Turning
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.
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.
A:对
B:错
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.
A:对
B:错
答案: 对
4、判断题:
An injection mold has many structures to accomplish the functions required by the injection molding process.
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.
A:对
B:错
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.( )
A:对
B:错
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. ( )
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.()
A:对
B:错
答案: 对
4、判断题:
The surface roughness of parts is directly related to the processing method.()
A:对
B:错
答案: 对
5、判断题:
Surface roughness belongs to micro geometric error. ()
A:对
B:错
答案: 对
6、判断题:
The surface roughness symbol represents the machined surface obtained by material removal. ()
A:对
B:错
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. ()
A:对
B:错
答案: 对
8、判断题:
The outer diameter micrometer is a measuring tool for measuring aperture and groove depth. ()
A:对
B:错
答案: 错
9、判断题:
The vernier universal angle ruler can measure any angle from 0 to 360 degrees. ()
A:对
B:错
答案: 错
10、判断题:
Relative measurement method is used when measuring length with percentile meter. ()
A:对
B:错
答案: 对
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