大学MOOC 材料工程导论（双语）(宿迁学院)1450340219 最新慕课完整章节测试答案

Video1WhyStudytheCourse

1、单选题：
‎In the first video of Module 1, the examples used to demonstrate the successful application of materials include ________‎‎‎
选项：
A: high-speed
railways
B: Shenzhou-11
spacecraft
C: Chinese
dragon
D: All
of the above
答案: 【 All
of the above】

2、单选题：
‍Which of the following characteristics is not desirable for the materials used to make the helmets?‌‍‌
选项：
A: Great heat resistance
B: Great impact resistance
C: High density
D: Great strength
答案: 【 High density】

3、单选题：
‎Which of the following materials belong to advanced materials？​
选项：
A: Functional
materials
B: Smart
materials
C: Biomaterials
D: All
of the above
答案: 【 All
of the above】

4、判断题：
‎The smart materials can respond to the environmental changes.‌
选项：
A: 正确
B: 错误
答案: 【 正确】

Video2MSEandmaterialsselection

1、单选题：
‍_______ is the rule in materials selection.‌
选项：
A: Compromise
B: Cost effectiveness
C: In-service conditions
D: Ideal combination of properties
答案: 【 Compromise】

2、单选题：
​There are ____ components involved in the discipline of materials science and engineering.‏
选项：
A: three
B: four
C: five 
D: six
答案: 【 four】

3、多选题：
‍The term materials science and engineering combine both _______ and ________.​
选项：
A: materials science
B: materials engineering
C: materials technology
D: materials processing
答案: 【 materials science;
materials engineering】

Video3TheMaterialsCycles

1、单选题：
‎Which of the following is not the approaches used to minimize any possible adverse impacts on the environment at all stages of the materials cycle?‌
选项：
A: life cycle analysis
B: life cycle assessment
C: green design
D: design for assembly
答案: 【 design for assembly】

2、多选题：
​Which of the following step(s) belongs (or belong) to materials cycles?‎
选项：
A: Extracting raw materials
B: Creating bulk materials
C: Fabricating products and system
D: Recycling and disposal
答案: 【 Extracting raw materials;
Creating bulk materials;
Fabricating products and system;
Recycling and disposal】

3、判断题：
‏The materials cycle is a system that involves interactions and exchanges among materials, energy, and the environment.‌
选项：
A: 正确
B: 错误
答案: 【 正确】

Video4FamilyofMaterials

1、单选题：
‎Which of the following is not ceramics?‏
选项：
A: Porcelain
B: Magnesium
C: Glass
D: Structural clay
答案: 【 Magnesium】

2、判断题：
‍Advanced materials include semiconductors, biomaterials, smart materials and nanomaterials.​
选项：
A: 正确
B: 错误
答案: 【 正确】

Video10Phasediagram

1、单选题：
‏A homogeneous part or aggregation of material that differs from another part due to difference in structure‏
选项：
A: Liquidus
B: Solidus
C: Solution
D: Phase
答案: 【 Phase】

2、多选题：
‎When an alloy is at a temperature above the solidus but below the liquidus, it coexists as ___________‎
选项：
A: Liquid
B: Gas
C: Solid
D: Plasma
答案: 【 Liquid;
Solid】

3、判断题：
‏The Gibbs rule represents a criterion for the number of phases that coexist within a system at equilibrium​
选项：
A: 正确
B: 错误
答案: 【 正确】

Video1PrimaryBonds

1、单选题：
‎The bonding type of Aluminum is        ‏
选项：
A: Ionic bondingIonic bonding
B: Metallic bonding
C: Covalent bonding
D: Hydrogen bonding
答案: 【 Metallic bonding】

Video2SecondaryBonds

1、单选题：
​O2 is a         molecule‌
选项：
A: Polar
B: Non-Polar
C: No
D: No
答案: 【 Non-Polar】

2、判断题：
‏Because of hydrogen bonding, hydrogen fluoride (HF) has a higher boiling point than hydrogen chloride (HCl)​
选项：
A: 正确
B: 错误
答案: 【 正确】

Video3CrystallineandAmorphousSolids

1、单选题：
‏Amorphous metals develop their miscrostructure as a result of _______‌
选项：
A: Dendrites
B: Directional solidification
C: Slip
D: Extremely rapid cooling
答案: 【 Extremely rapid cooling】

2、多选题：
‏A crystalline solid has           ‌
选项：
A:  Long-range order
B: Distinctive X-ray pattern
C:  Irregular arrangement of atoms
D: No
答案: 【  Long-range order;
Distinctive X-ray pattern】

Video4UnitCellsandSpaceLattices

1、判断题：
‎When stacked together, the unit cells form the whole crystal‌
选项：
A: 正确
B: 错误
答案: 【 正确】

2、判断题：
‏The periodicity of any single crystal can be described by an equivalent space lattice‍
选项：
A: 正确
B: 错误
答案: 【 正确】

Video5CrystalSystems

1、判断题：
​In crystallography, there are eight crystal systems and 14 Bravais lattices‌
选项：
A: 正确
B: 错误
答案: 【 错误】

Video6PolymorphismandAllotropy

1、判断题：
‍Any crystal structure changes in a material produces different properties.‏
选项：
A: 正确
B: 错误
答案: 【 正确】

2、判断题：
‏Tin pest occurs because of an allotropic change of Tin below 13.2oC‍
选项：
A: 正确
B: 错误
答案: 【 正确】

Video7PointDefectsandCrystalImpurites

1、判断题：
‍Steel is an interstitial solid solution with impurity carbon atoms in iron crystal lattice​
选项：
A: 正确
B: 错误
答案: 【 正确】

Video8LineDefectsandDislocationMovement

1、判断题：
‍Dislocations make it easier for slip or plastic deformation to occur.‎
选项：
A: 正确
B: 错误
答案: 【 正确】

2、判断题：
‏A ductile metal becomes harder and stronger as it is subjected to cold working‏
选项：
A: 正确
B: 错误
答案: 【 正确】

Video9AreaDefects

1、单选题：
​If a crystalline solid consists of a number of grains, such material is called         ‌
选项：
A: A Polycrystalline Solid
B: An Amorphous Solid
C: A Single Crystal
D: No
答案: 【 A Polycrystalline Solid】

2、判断题：
‎Internal atoms have missing bonds, so, they are in higher energy states than surface atoms‌
选项：
A: 正确
B: 错误
答案: 【 错误】

Video10ThermalExpansion

1、判断题：
‏Material with high bonding energy has low thermal expansion coefficient.‏
选项：
A: 正确
B: 错误
答案: 【 正确】

Video11ThermalConductivity

1、判断题：
‏Polymers transmit heat mainly through free electrons.‍
选项：
A: 正确
B: 错误
答案: 【 错误】

Video1StressandStrain

1、单选题：
‎Which equation describes the Engineering strain?‍
选项：
A:
B:
C:
D:
答案: 【 】

2、多选题：
​What information you can find in a stress-strain diagram?‏
选项：
A: Elastic modulus
B: Yield Point
C: Ultimate Strength
D: Fracture Point
答案: 【 Elastic modulus;
Yield Point;
Ultimate Strength;
Fracture Point】

Video2ElasticandPlasticDeformation

1、多选题：
‎Which of the below terms have same meaning?‏
选项：
A: Ultimate Strength
B: Tensile Strength
C: Yield Strength
D: Uniform Strain
答案: 【 Ultimate Strength;
Tensile Strength】

2、判断题：
​A material subjects to a deformation under force and can go back to its original shape. We call the material undergoes an elastic deformation.​
选项：
A: 正确
B: 错误
答案: 【 正确】

Video3Ductility

1、单选题：
‍In a stress-strain diagram, which region refers to ductile property?‏
选项：
A: Elastic Region
B: Plastic Region
C: Elastic and Plastic Region
D: No
答案: 【 Elastic and Plastic Region】

2、多选题：
​Which statement is correct?‍
选项：
A: The area under which the straight-line portion (elastic region) of the stress-strain curve is modulus of resilience
B: Modulus resilience is a measure of the energy per unit volume that the material can absorb without plastic deformation
C: Resilience tells you the capacity of a material to adsorb energy when it is deformed elastically and then, upon unloading, to have this energy recovered
D: No
答案: 【 The area under which the straight-line portion (elastic region) of the stress-strain curve is modulus of resilience;
Modulus resilience is a measure of the energy per unit volume that the material can absorb without plastic deformation;
Resilience tells you the capacity of a material to adsorb energy when it is deformed elastically and then, upon unloading, to have this energy recovered】

Video4Toughness

1、单选题：
‏_____is defined as a sudden application of a load confined to a localized area of a material.​
选项：
A: Stretch
B: Compress
C: Punch
D: Impact
答案: 【 Impact】

2、多选题：
‏Which of the below statement are correct?‎
选项：
A: Impact test is a typical static testing method.
B: Toughness is a measure of a material’s resistance to brittle fracture when a crack is present.
C: A material’s tensile stress tends to gradually increase with the size of the crack increases.
D: Fracture toughness is used in design to find allowable flaw size.
答案: 【 Toughness is a measure of a material’s resistance to brittle fracture when a crack is present.;
Fracture toughness is used in design to find allowable flaw size.】

Video5Ductile-to-BrittleTransition

1、单选题：
​Adding more carbon, the steel show ___transition temperature ranges.‏
选项：
A: Wider
B: Narrower
C: Same
D: No
答案: 【 Wider】

2、判断题：
‏High temperature may change a ductile material into brittle.‌
选项：
A: 正确
B: 错误
答案: 【 错误】

3、判断题：
‎A brittle material has very little plastic deformation.‌
选项：
A: 正确
B: 错误
答案: 【 正确】

4、判断题：
‎When broken, cross-section image of a ductile material has flake-like structure.​
选项：
A: 正确
B: 错误
答案: 【 错误】

Video6Fatigue

1、单选题：
‌The _____ the stress is applied to the material, the less cycle it will endure before its failure.‍
选项：
A: Lower
B: Higher
C: Quick
D: Slow
答案: 【 Higher】

2、单选题：
​Fatigue limits of a typical ferrous alloy is about____ tensile strength.‍
选项：
A: Half
B: 1/3
C: 1/4
D: 1/5
答案: 【 Half】

3、判断题：
‍All materials have a fatigue limit.‎
选项：
A: 正确
B: 错误
答案: 【 错误】

Video7Creep

1、多选题：
‍Which statements about creep forming is correct?‎
选项：
A: A workpiece is loaded against a die or tool for a specific time
B: The load is normally applied using pressure or vacuum at temp. around 600°C
C: The process results in predetermined shapes that required little or no machining
D: No
答案: 【 A workpiece is loaded against a die or tool for a specific time;
The process results in predetermined shapes that required little or no machining】

2、判断题：
‍Creep happens at specific temperatures.‍
选项：
A: 正确
B: 错误
答案: 【 错误】

3、判断题：
​The creep rate is higher at a high temperature.‎
选项：
A: 正确
B: 错误
答案: 【 正确】

Video8Hardness

1、单选题：
‎What is range of Mohs Scale?‎