大学MOOC 电厂金属材料应用（张贺）(沈阳工程学院)1452059167 最新慕课完整章节测试答案

【在线测试】-金属的力学性能

1、单选题：
‎Materials that are soft and easily deformed are called       .​
选项：
A: ductile
B: elastic
C: plastic
D: malleable
答案: 【 plastic】

2、单选题：
‍A material that stretches considerably before breaking is considered to be        .‍
选项：
A: ductile
B: brittle
C: tough
D: strong
答案: 【 ductile】

3、单选题：
‏When a material returns to its original size and shape after a stress or force has been applied and removed, it demonstrates a property known as       .‎
选项：
A: ductility
B: plasticity
C: malleability
D: elasticity
答案: 【 elasticity】

4、单选题：
‍The ability of metal to resist indentation or penetration best describes the material's       . ‍
选项：
A: ductility
B: impact strength
C: tensile strength
D: hardness
答案: 【 hardness】

5、单选题：
‍The property that describes a metal’s ability to resist surface wear and abrasion is         .‏
选项：
A: Fatigue strength
B: Hardness
C: Toughness 
D: Tensile strength
答案: 【 Hardness】

6、多选题：
‎The test that is used to measure a metal’s toughness is           .​
选项：
A: Charpy test 
B: Brinell test
C: Tensile test
D: Izod test
答案: 【 Charpy test ;
Izod test】

7、多选题：
The most common hardness scales are       .‏
选项：
A: Brinell 
B: Rockwell
C: Vickers
D: none of them
答案: 【 Brinell ;
Rockwell;
Vickers】

8、多选题：
‏Izod test is used to measure           .‌
选项：
A: Hardness
B: Toughness
C: Tensile strength
D: Impact strength
答案: 【 Toughness;
Impact strength】

9、判断题：
‍Different hardness indexes(指标) are measured in exactly the same way.​
选项：
A: 正确
B: 错误
答案: 【 错误】

10、判断题：
‎Force is also called load.‏
选项：
A: 正确
B: 错误
答案: 【 正确】

【在线测试1】-金属的结晶

1、单选题：
‌Which is the lattice of α-Fe？           ​
选项：
A: (BCC)
B: (FCC)
C: (HCP)
D: (BCT)
答案: 【 (BCC)】

2、单选题：
‌Which is the lattice of γ-Fe?          .‎
选项：
A: (BCC)
B: (FCC)
C: (HCP)
D: (BCT)
答案: 【 (FCC)】

3、单选题：
​Which is the lattice of Zn?          .‍
选项：
A: (BCC)
B: (FCC)
C: (HCP)
D: (BCT)
答案: 【 (HCP)】

4、单选题：
‏Which is the Body-Centered Cubic?            ‍
选项：
A: Al
B: γ-Fe 
C: α-Fe
D: Mg
答案: 【 α-Fe】

5、单选题：
​Which is the Face-Centered Cubic?         .‌
选项：
A: β-Fe
B: γ-Fe
C: α-Fe
D: Mg
答案: 【 γ-Fe】

6、单选题：
‎Dislocation is belonging to         .‍
选项：
A: Body Defects
B: Planar Defects
C: Line Defects
D: Point Defects
答案: 【 Line Defects】

7、单选题：
‍Grain boundaries are belonging to          .‎
选项：
A: Body Defects 
B: Planar Defects
C: Line Defects
D: Point Defects
答案: 【 Planar Defects】

8、单选题：
‏The lattice of solid solution is the same as         .​
选项：
A: solution
B: solvent 
C: solute
D: solute or solvent
答案: 【 solvent 】

9、单选题：
‏The crystallization of pure metal usually proceeds in what condition?‏
选项：
A: Under a constant temperature
B: A certain temperature range
C: Above freezing temperature
D: none of them
答案: 【 Under a constant temperature】

10、单选题：
‌In practical production, when metals are cooling,             .‏
选项：
A: actual crystallizing temperature is always below theoretic crystallizing temperature
B: actual crystallizing temperature is always equal to theoretic crystallizing temperature.
C: actual crystallizing temperature is always higher than theoretic crystallizing temperature
D: actual crystallizing temperature and theoretic crystallizing temperature have no relationship.
答案: 【 actual crystallizing temperature is always below theoretic crystallizing temperature】

11、单选题：

‍What kind of lattice does the figure below belong to？

‏

‍

‏选项：
A: BCC 
B: FCC 
C: HCP
D: BCT
答案: 【 BCC 】

12、单选题：

‎What kind of lattice does the figure below belong to？

‏

‎

‏

‎

‏选项：
A: BCT
B: HCP
C: FCC 
D: BCC
答案: 【 FCC 】

13、单选题：

​What kind of lattice does the figure below belong to？

‌

​

‌选项：
A: BCC
B: FCC
C: HCP
D: BCT
答案: 【 HCP】

14、单选题：
‌If a metal transforms from a melted liquid into a crystalline solid, we call this process          .‍
选项：
A: crystallization
B: cooling
C: solidification
D: freezing
答案: 【 crystallization】

15、多选题：
‌According to the geometrical shape, crystal lattice imperfections are classified          .‎
选项：
A: Point Defects
B: Line Defects
C: Planar Defects
D: none of them
答案: 【 Point Defects;
Line Defects;
Planar Defects】

16、多选题：
‎Most elementary metals (about 90%) crystallize upon solidification into three densely packed crystal structures, they are            .‍
选项：
A: ACC
B: BCC
C: FCC
D: HCP
答案: 【 BCC;
FCC;
HCP】

17、多选题：
‏Which of the following methods can strengthen the properties of metals?              ‍
选项：
A: Deformation Strengthening
B: Refined Grain Strengthening
C: Solid Solution Strengthening
D: none of them
答案: 【 Deformation Strengthening;
Refined Grain Strengthening;
Solid Solution Strengthening】

18、多选题：
‏Which of the following are the properties of crystals?​
选项：
A: long-range order
B: have fixed melting points
C: anisotropic各向异性
D: short-range order
E: isotropic各向同性
答案: 【 long-range order;
have fixed melting points;
anisotropic各向异性】

19、多选题：
‏Which of the following are the properties of amorphous solids?​
选项：
A: long-range order
B: don’t have fixed melting points
C: anisotropic各向异性
D: short-range order
E: isotropic各向同性
答案: 【 don’t have fixed melting points;
short-range order;
isotropic各向同性】

20、多选题：
‍Which of the following are the methods of getting fine grains?‏
选项：
A: Increase the degree of supercooling 
B: Inoculation
C: Vibration and stirring
D: Reduce the degree of supercooling
答案: 【 Increase the degree of supercooling ;
Inoculation;
Vibration and stirring】

【第一次单元测验】4.30周四

1、单选题：
‌Properties of a material that may be hammered（锤击） into shape without breaking are called         . ‍
选项：
A: plasticity塑性
B: impact strength冲击强度
C: brittleness脆性
D: malleability可锻性
答案: 【 malleability可锻性】

2、单选题：
Properties of a material that are soft and easily deformed are called         .​
选项：
A: ductility延展性
B: elasticity弹性
C: plasticity塑性 
D: malleability可锻性
答案: 【 plasticity塑性 】

3、单选题：
A material that stretches（伸长，拉伸） considerably before breaking is considered to be             . ‎
选项：
A: ductile延展的 
B: brittle脆的 
C: hard硬的
D: strong强壮的
答案: 【 ductile延展的 】

4、单选题：
​The ability of metal to resist indentation（压痕） or penetration（渗透） best describes the material's          .  ‏
选项：
A: ductility延展性
B: impact strength冲击强度
C: tensile strength抗拉强度
D: hardness硬度
答案: 【 hardness硬度】

5、单选题：
When a material returns to its original（原始的） size and shape after a stress or force has been applied and removed, it demonstrates a property known as            . ‎
选项：
A: ductility延展性 
B: plasticity塑性
C: malleability可锻性
D: elasticity弹性
答案: 【 elasticity弹性】

6、单选题：
In practical production, when metals are cooling,          .在实际生产中，当金属冷却时，下列说法正确的是‎
选项：
A: actual crystallizing temperature（实际结晶温度） is always below theoretic crystallizing temperature（理论结晶温度）.
B: actual crystallizing temperature is always equal to theoretic crystallizing temperature.
C: actual crystallizing temperature is always higher than theoretic crystallizing temperature.
D: actual crystallizing temperature and theoretic crystallizing temperature have no relationship.
答案: 【 actual crystallizing temperature（实际结晶温度） is always below theoretic crystallizing temperature（理论结晶温度）.】

7、单选题：
Dislocation（位错） is belonging to          .‏
选项：
A: Body Defects
B: Planar Defects
C: Line Defects 
D: Point Defects
答案: 【 Line Defects 】

8、单选题：
Grain boundaries（晶界）are belonging to           .‎
选项：
A: Body Defects
B: Planar Defects 
C: Line Defects
D: Point Defects
答案: 【 Planar Defects 】

9、单选题：
The lattice（晶格）of solid solution is the same as          .​
选项：
A: solution溶体
B: solvent溶剂
C: solute溶质
D: solute or solvent
答案: 【 solvent溶剂】

10、单选题：
The crystallization of pure metal usually proceeds in what condition?           ‏纯金属的结晶通常以哪种方式进行？‏
选项：
A: Under a constant temperature恒定温度下
B: A certain temperature range某一个温度范围
C: Above freezing temperature高于凝固温度
D: all of above
答案: 【 Under a constant temperat